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Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2018	Jul. 31, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	MIDDLESEX WATER CO
Entity Central Index Key	0000066004
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		16,392,350
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2018

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Operating Revenues	$ 34,919	$ 33,014	$ 66,096	$ 63,145
Operating Expenses:
Operations and Maintenance	16,825	16,856	34,659	32,795
Depreciation	3,736	3,385	7,345	6,693
Other Taxes	3,637	3,415	7,021	6,724
Total Operating Expenses	24,198	23,656	49,025	46,212
Operating Income	10,721	9,358	17,071	16,933
Other Income (Expense):
Allowance for Funds Used During Construction	214	180	381	299
Other Income (Expense), net	571	230	868	436
Total Other Income, net	785	410	1,249	735
Interest Charges	2,068	1,469	3,206	2,472
Income before Income Taxes	9,438	8,299	15,114	15,196
Income Taxes	763	2,918	1,945	5,374
Net Income	8,675	5,381	13,169	9,822
Preferred Stock Dividend Requirements	36	36	72	72
Earnings Applicable to Common Stock	$ 8,639	$ 5,345	$ 13,097	$ 9,750
Earnings per share of Common Stock:
Basic	$ 0.53	$ 0.33	$ 0.80	$ 0.60
Diluted	$ 0.52	$ 0.33	$ 0.80	$ 0.59
Average Number of Common Shares Outstanding:
Basic	16,388	16,332	16,371	16,316
Diluted	16,544	16,488	16,527	16,472
Cash Dividends Paid per Common Share	$ 0.2238	$ 0.2113	$ 0.4475	$ 0.4225

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
UTILITY PLANT:
Water Production	$ 154,542	$ 153,844
Transmission and Distribution	480,265	468,649
General	70,837	69,457
Construction Work in Progress	26,517	11,562
TOTAL	732,161	703,512
Less Accumulated Depreciation	151,681	146,272
UTILITY PLANT - NET	580,480	557,240
CURRENT ASSETS:
Cash and Cash Equivalents	2,673	4,937
Accounts Receivable, net	11,011	10,785
Unbilled Revenues	8,744	6,999
Materials and Supplies (at average cost)	4,826	4,118
Prepayments	3,805	2,408
TOTAL CURRENT ASSETS	31,059	29,247
Preliminary Survey and Investigation Charges	4,859	4,676
Regulatory Assets	99,717	58,423
Operations Contracts, Developer and Other Receivables	439	439
Restricted Cash	3,157	1,460
Non-utility Assets - Net	9,598	9,478
Other	435	177
TOTAL DEFERRED CHARGES AND OTHER ASSETS	118,205	74,653
TOTAL ASSETS	729,744	661,140
CAPITALIZATION:
Common Stock, No Par Value	156,251	155,120
Retained Earnings	79,826	74,055
TOTAL COMMON EQUITY	236,077	229,175
Preferred Stock	2,433	2,433
Long-term Debt	142,129	139,045
TOTAL CAPITALIZATION	380,639	370,653
CURRENT LIABILITIES:
Current Portion of Long-term Debt	7,236	6,865
Notes Payable	39,000	28,000
Accounts Payable	16,413	13,929
Accrued Taxes	14,700	11,418
Accrued Interest	1,259	1,093
Unearned Revenues and Advanced Service Fees	974	951
Other	1,993	2,281
TOTAL CURRENT LIABILITIES	81,575	64,537
COMMITMENTS AND CONTINGENT LIABILITIES (Note 7)
DEFERRED CREDITS AND OTHER LIABILITIES:
Customer Advances for Construction	21,832	21,423
Accumulated Deferred Income Taxes	43,706	43,160
Employee Benefit Plans	35,128	36,686
Regulatory Liabilities	83,298	43,745
Other	1,250	1,315
TOTAL DEFERRED CREDITS AND OTHER LIABILITIES	185,214	146,329
CONTRIBUTIONS IN AID OF CONSTRUCTION	82,316	79,621
TOTAL CAPITALIZATION AND LIABILITIES	$ 729,744	$ 661,140

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 13,169	$ 9,822
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	7,793	6,887
Provision for Deferred Income Taxes	(2,760)	4,395
Equity Portion of Allowance for Funds Used During Construction (AFUDC)	(256)	(205)
Cash Surrender Value of Life Insurance	(60)	(114)
Stock Compensation Expense	535	437
Changes in Assets and Liabilities:
Accounts Receivable	(226)	176
Unbilled Revenues	(1,745)	(1,694)
Materials & Supplies	(708)	(787)
Prepayments	(1,397)	(888)
Accounts Payable	2,484	2,702
Accrued Taxes	3,282	752
Accrued Interest	166	(6)
Employee Benefit Plans	(2,478)	(640)
Unearned Revenue & Advanced Service Fees	23	44
Other Assets and Liabilities	1,401	(710)
NET CASH PROVIDED BY OPERATING ACTIVITIES	19,223	20,171
CASH FLOWS FROM INVESTING ACTIVITIES:
Utility Plant Expenditures, Including AFUDC of $125 in 2018, $94 in 2017	(28,377)	(21,165)
NET CASH USED IN INVESTING ACTIVITIES	(28,377)	(21,165)
CASH FLOWS FROM FINANCING ACTIVITIES:
Redemption of Long-term Debt	(2,144)	(2,115)
Proceeds from Issuance of Long-term Debt	5,567	4,047
Net Short-term Bank Borrowings	11,000	5,000
Deferred Debt Issuance Expense	(75)	(33)
Proceeds from Issuance of Common Stock	596	592
Payment of Common Dividends	(7,325)	(6,893)
Payment of Preferred Dividends	(72)	(72)
Construction Advances and Contributions-Net	1,040	278
NET CASH PROVIDED BY FINANCING ACTIVITIES	8,587	804
NET CHANGES IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(567)	(190)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF PERIOD	4,937	4,318
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	2,673	4,128
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITY:
Utility Plant received as Construction Advances and Contributions	2,064	1,131
Cash Paid During the Year for:
Interest	2,711	2,594
Interest Capitalized	125	94
Income Taxes	$ 1,989	$ 714

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Cash Flows [Abstract]
Allowance for funds used during construction	$ 125	$ 94

CONDENSED CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Common Stock, No Par Value	$ 156,251	$ 155,120
Retained Earnings	79,826	74,055
TOTAL COMMON EQUITY	236,077	229,175
TOTAL PREFERRED STOCK	2,433	2,433
SUBTOTAL LONG-TERM DEBT	151,276	147,852
Add: Premium on Issuance of Long-term Debt	1,369	1,367
Less: Unamortized Debt Expense	(3,280)	(3,309)
Less: Current Portion of Long-term Debt	(7,236)	(6,865)
TOTAL LONG-TERM DEBT	142,129	139,045
Amortizing Secured Note, due December 20, 2021 [Member]
SUBTOTAL LONG-TERM DEBT	1,055	1,180
Amortizing Secured Note, due May 19, 2028 [Member]
SUBTOTAL LONG-TERM DEBT	4,165	4,375
Amortizing Secured Note, due August 25, 2030 [Member]
SUBTOTAL LONG-TERM DEBT	3,407	3,547
Amortizing Secured Note, due September 19, 2031 [Member]
SUBTOTAL LONG-TERM DEBT	3,687	3,827
State Revolving Trust Note, due December 31, 2022 [Member]
SUBTOTAL LONG-TERM DEBT	253	279
State Revolving Trust Note, due May 1, 2025 [Member]
SUBTOTAL LONG-TERM DEBT	1,743	1,851
State Revolving Trust Note, due March 1, 2026 [Member]
SUBTOTAL LONG-TERM DEBT	372	392
State Revolving Trust Note, due January 25, 2027 [Member]
SUBTOTAL LONG-TERM DEBT	408	427
State Revolving Trust Note, due December 1, 2026 [Member]
SUBTOTAL LONG-TERM DEBT	527	553
State Revolving Trust Bond 4.00% to 5.00%, due August 1, 2021 [Member]
SUBTOTAL LONG-TERM DEBT	162	162
State Revolving Trust Bond 0.00%, due August 1, 2021 [Member]
SUBTOTAL LONG-TERM DEBT	124	128
State Revolving Trust Note, due January 1, 2028 [Member]
SUBTOTAL LONG-TERM DEBT	80	84
State Revolving Trust Note, due July 1, 2028 [Member]
SUBTOTAL LONG-TERM DEBT	246	256
State Revolving Trust Note, due August 1, 2031 [Member]
SUBTOTAL LONG-TERM DEBT	935	962
Amortizing Secured Note, due April 20, 2029 [Member]
SUBTOTAL LONG-TERM DEBT	3,779	3,953
Amortizing Secured Note 7.05%, due January 20, 2030 [Member]
SUBTOTAL LONG-TERM DEBT	2,896	3,021
Amortizing Secured Note 5.69%, due January 20, 2030 [Member]
SUBTOTAL LONG-TERM DEBT	5,940	6,197
Amortizing Secured Note, due April 20, 2040 [Member]
SUBTOTAL LONG-TERM DEBT	9,607	9,827
Amortizing Secured Note, due April 20, 2040 [Member]
SUBTOTAL LONG-TERM DEBT	3,566	3,646
State Revolving Trust Note, due July 1, 2031 [Member]
SUBTOTAL LONG-TERM DEBT	2,015	2,075
State Revolving Trust Note, due November 30, 2030 [Member]
SUBTOTAL LONG-TERM DEBT	1,057	1,090
Construction Loans [Member]
SUBTOTAL LONG-TERM DEBT		3,874
First Mortgage Bonds - Series X [Member]
SUBTOTAL LONG-TERM DEBT	54	55
First Mortgage Bonds - Series Y [Member]
SUBTOTAL LONG-TERM DEBT	61	61
First Mortgage Bonds - Series Z [Member]
SUBTOTAL LONG-TERM DEBT	221	224
First Mortgage Bonds - Series AA [Member]
SUBTOTAL LONG-TERM DEBT	300	300
First Mortgage Bonds - Series BB [Member]
SUBTOTAL LONG-TERM DEBT	471	482
First Mortgage Bonds - Series CC [Member]
SUBTOTAL LONG-TERM DEBT	636	636
First Mortgage Bonds - Series EE [Member]
SUBTOTAL LONG-TERM DEBT	2,231	2,296
First Mortgage Bonds - Series FF [Member]
SUBTOTAL LONG-TERM DEBT	3,495	3,495
First Mortgage Bonds - Series GG [Member]
SUBTOTAL LONG-TERM DEBT	799	813
First Mortgage Bonds - Series HH [Member]
SUBTOTAL LONG-TERM DEBT	880	880
First Mortgage Bonds - Series II [Member]
SUBTOTAL LONG-TERM DEBT	594	610
First Mortgage Bonds - Series JJ [Member]
SUBTOTAL LONG-TERM DEBT	750	750
First Mortgage Bonds - Series KK [Member]
SUBTOTAL LONG-TERM DEBT	969	988
First Mortgage Bonds - Series LL [Member]
SUBTOTAL LONG-TERM DEBT	1,095	1,095
First Mortgage Bonds - Series MM [Member]
SUBTOTAL LONG-TERM DEBT	1,203	1,237
First Mortgage Bonds - Series NN [Member]
SUBTOTAL LONG-TERM DEBT	1,505	1,505
First Mortgage Bonds - Series OO [Member]
SUBTOTAL LONG-TERM DEBT	2,057	2,107
First Mortgage Bonds - Series PP [Member]
SUBTOTAL LONG-TERM DEBT	740	740
First Mortgage Bonds - Series QQ [Member]
SUBTOTAL LONG-TERM DEBT	9,915	9,915
First Mortgage Bonds - Series RR [Member]
SUBTOTAL LONG-TERM DEBT	22,500	22,500
First Mortgage Bonds - Series SS [Member]
SUBTOTAL LONG-TERM DEBT	23,000	23,000
First Mortgage Bonds - Series TT [Member]
SUBTOTAL LONG-TERM DEBT	2,208	2,258
First Mortgage Bonds - Series UU [Member]
SUBTOTAL LONG-TERM DEBT	845	845
First Mortgage Bonds - Series VV [Member]
SUBTOTAL LONG-TERM DEBT	2,243	2,290
First Mortgage Bonds - Series WW [Member]
SUBTOTAL LONG-TERM DEBT	830	830
First Mortgage Bonds - Series XX [Member]
SUBTOTAL LONG-TERM DEBT	11,259	11,259
First Mortgage Bonds - Series YY [Member]
SUBTOTAL LONG-TERM DEBT	3,860	3,860
0.00%, Series 2018A, due August 1, 2047 [Member]
SUBTOTAL LONG-TERM DEBT	7,076
3.00% to 5.00%, Series 2018B, due August 1, 2047 [Member]
SUBTOTAL LONG-TERM DEBT	2,365
Convertible Preferred Stock $7.00 Series [Member]
TOTAL PREFERRED STOCK	1,005	1,005
Convertible Preferred Stock $8.00 Series [Member]
TOTAL PREFERRED STOCK	349	349
Nonredeemable Preferred Stock $7.00 Series [Member]
TOTAL PREFERRED STOCK	79	79
Nonredeemable Preferred Stock $4.75 Series [Member]
TOTAL PREFERRED STOCK	1,000	1,000
State Revolving Trust Note, due February 1, 2036 [Member]
SUBTOTAL LONG-TERM DEBT	$ 1,090	$ 1,115

CONDENSED CONSOLIDATED STATEMENTS OF CAPITAL STOCK AND LONG-TERM DEBT (Parenthetical) - shares shares in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Common Stock, Shares Authorized	40,000	40,000
Common Stock, Shares Outstanding	16,392	16,352
Preferred Stock, Shares Authorized	126	126
Preferred Stock, Shares Outstanding	24	24
State Revolving Trust Note, due February 1, 2036 [Member]
Interest rate	2.00%
Due date of debt	Feb. 01, 2036
Convertible Preferred Stock $7.00 Series [Member]
Preferred Stock, Shares Outstanding	10	10
Convertible Preferred Stock $8.00 Series [Member]
Preferred Stock, Shares Outstanding	3	3
Nonredeemable Preferred Stock $7.00 Series [Member]
Preferred Stock, Shares Outstanding	1	1
Nonredeemable Preferred Stock $4.75 Series [Member]
Preferred Stock, Shares Outstanding	10	10
Amortizing Secured Note, due December 20, 2021 [Member]
Interest rate	8.05%
Due date of debt	Dec. 20, 2021
Amortizing Secured Note, due May 19, 2028 [Member]
Interest rate	6.25%
Due date of debt	May 19, 2028
Amortizing Secured Note, due August 25, 2030 [Member]
Interest rate	6.44%
Due date of debt	Aug. 25, 2030
Amortizing Secured Note, due September 19, 2031 [Member]
Interest rate	6.46%
Due date of debt	Sep. 19, 2031
State Revolving Trust Note, due December 31, 2022 [Member]
Interest rate	4.22%
Due date of debt	Dec. 31, 2022
State Revolving Trust Note, due May 1, 2025 [Member]
Interest rate	3.60%
Due date of debt	May 01, 2025
State Revolving Trust Note, due March 1, 2026 [Member]
Interest rate	3.30%
Due date of debt	Mar. 01, 2026
State Revolving Trust Note, due January 25, 2027 [Member]
Interest rate	3.49%
Due date of debt	Jan. 25, 2027
State Revolving Trust Note, due December 1, 2026 [Member]
Interest rate	4.03%
Due date of debt	Dec. 01, 2026
State Revolving Trust Bond 4.00% to 5.00%, due August 1, 2021 [Member]
Due date of debt	Aug. 01, 2021
State Revolving Trust Bond 4.00% to 5.00%, due August 1, 2021 [Member] \| Minimum [Member]
Interest rate	4.00%
State Revolving Trust Bond 4.00% to 5.00%, due August 1, 2021 [Member] \| Maximum [Member]
Interest rate	5.00%
State Revolving Trust Bond 0.00%, due August 1, 2021 [Member]
Due date of debt	Aug. 01, 2021
State Revolving Trust Note, due July 1, 2028 [Member]
Interest rate	3.64%
Due date of debt	Jul. 01, 2028
State Revolving Trust Note, due January 1, 2028 [Member]
Interest rate	3.64%
Due date of debt	Jan. 01, 2028
State Revolving Trust Note, due August 1, 2031 [Member]
Interest rate	3.45%
Due date of debt	Aug. 01, 2031
Amortizing Secured Note, due April 20, 2029 [Member]
Interest rate	6.59%
Due date of debt	Apr. 20, 2029
Amortizing Secured Note 7.05%, due January 20, 2030 [Member]
Interest rate	7.05%
Due date of debt	Jan. 20, 2030
Amortizing Secured Note 5.69%, due January 20, 2030 [Member]
Interest rate	5.69%
Due date of debt	Jan. 20, 2030
Amortizing Secured Note, due April 20, 2040 [Member]
Interest rate	4.45%
Due date of debt	Apr. 20, 2040
Amortizing Secured Note, due April 20, 2040 [Member]
Interest rate	4.47%
Due date of debt	Apr. 20, 2040
State Revolving Trust Note, due July 1, 2031 [Member]
Interest rate	3.75%
Due date of debt	Jul. 01, 2031
State Revolving Trust Note, due November 30, 2030 [Member]
Interest rate	3.75%
Due date of debt	Nov. 30, 2030
First Mortgage Bonds - Series X [Member]
Interest rate	0.00%
Due date of debt	Aug. 01, 2018
First Mortgage Bonds - Series Y [Member]
Due date of debt	Aug. 01, 2018
First Mortgage Bonds - Series Y [Member] \| Minimum [Member]
Interest rate	4.25%
First Mortgage Bonds - Series Y [Member] \| Maximum [Member]
Interest rate	4.63%
First Mortgage Bonds - Series Z [Member]
Interest rate	0.00%
Due date of debt	Aug. 01, 2019
First Mortgage Bonds - Series AA [Member]
Due date of debt	Aug. 01, 2019
First Mortgage Bonds - Series AA [Member] \| Minimum [Member]
Interest rate	5.25%
First Mortgage Bonds - Series AA [Member] \| Maximum [Member]
Interest rate	5.75%
First Mortgage Bonds - Series BB [Member]
Interest rate	0.00%
Due date of debt	Aug. 01, 2021
First Mortgage Bonds - Series CC [Member]
Due date of debt	Aug. 01, 2021
First Mortgage Bonds - Series CC [Member] \| Minimum [Member]
Interest rate	4.00%
First Mortgage Bonds - Series CC [Member] \| Maximum [Member]
Interest rate	5.00%
First Mortgage Bonds - Series EE [Member]
Interest rate	0.00%
Due date of debt	Aug. 01, 2023
First Mortgage Bonds - Series FF [Member]
Due date of debt	Aug. 01, 2024
First Mortgage Bonds - Series FF [Member] \| Minimum [Member]
Interest rate	3.00%
First Mortgage Bonds - Series FF [Member] \| Maximum [Member]
Interest rate	5.50%
First Mortgage Bonds - Series GG [Member]
Interest rate	0.00%
Due date of debt	Aug. 01, 2026
First Mortgage Bonds - Series HH [Member]
Due date of debt	Aug. 01, 2026
First Mortgage Bonds - Series HH [Member] \| Minimum [Member]
Interest rate	4.00%
First Mortgage Bonds - Series HH [Member] \| Maximum [Member]
Interest rate	5.00%
First Mortgage Bonds - Series II [Member]
Interest rate	0.00%
Due date of debt	Aug. 01, 2024
First Mortgage Bonds - Series JJ [Member]
Due date of debt	Aug. 01, 2027
First Mortgage Bonds - Series JJ [Member] \| Minimum [Member]
Interest rate	3.40%
First Mortgage Bonds - Series JJ [Member] \| Maximum [Member]
Interest rate	5.00%
First Mortgage Bonds - Series KK [Member]
Interest rate	0.00%
Due date of debt	Aug. 01, 2028
First Mortgage Bonds - Series LL [Member]
Due date of debt	Aug. 01, 2028
First Mortgage Bonds - Series LL [Member] \| Minimum [Member]
Interest rate	5.00%
First Mortgage Bonds - Series LL [Member] \| Maximum [Member]
Interest rate	5.50%
First Mortgage Bonds - Series MM [Member]
Interest rate	0.00%
Due date of debt	Aug. 01, 2030
First Mortgage Bonds - Series NN [Member]
Due date of debt	Aug. 01, 2030
First Mortgage Bonds - Series NN [Member] \| Minimum [Member]
Interest rate	3.00%
First Mortgage Bonds - Series NN [Member] \| Maximum [Member]
Interest rate	4.375%
First Mortgage Bonds - Series OO [Member]
Interest rate	0.00%
Due date of debt	Aug. 01, 2031
First Mortgage Bonds - Series PP [Member]
Due date of debt	Aug. 01, 2031
First Mortgage Bonds - Series PP [Member] \| Minimum [Member]
Interest rate	2.00%
First Mortgage Bonds - Series PP [Member] \| Maximum [Member]
Interest rate	5.00%
First Mortgage Bonds - Series QQ [Member]
Interest rate	5.00%
Due date of debt	Oct. 01, 2023
First Mortgage Bonds - Series RR [Member]
Interest rate	3.80%
Due date of debt	Oct. 01, 2038
First Mortgage Bonds - Series SS [Member]
Interest rate	4.25%
Due date of debt	Oct. 01, 2047
First Mortgage Bonds - Series TT [Member]
Interest rate	0.00%
Due date of debt	Aug. 01, 2032
First Mortgage Bonds - Series UU [Member]
Due date of debt	Aug. 01, 2032
First Mortgage Bonds - Series UU [Member] \| Minimum [Member]
Interest rate	3.00%
First Mortgage Bonds - Series UU [Member] \| Maximum [Member]
Interest rate	3.25%
First Mortgage Bonds - Series VV [Member]
Interest rate	0.00%
Due date of debt	Aug. 01, 2033
First Mortgage Bonds - Series WW [Member]
Due date of debt	Aug. 01, 2033
First Mortgage Bonds - Series WW [Member] \| Minimum [Member]
Interest rate	3.00%
First Mortgage Bonds - Series WW [Member] \| Maximum [Member]
Interest rate	5.00%
First Mortgage Bonds - Series XX [Member]
Interest rate	0.00%
Due date of debt	Aug. 01, 2047
First Mortgage Bonds - Series YY [Member]
Due date of debt	Aug. 01, 2047
First Mortgage Bonds - Series YY [Member] \| Minimum [Member]
Interest rate	3.00%
First Mortgage Bonds - Series YY [Member] \| Maximum [Member]
Interest rate	5.00%
0.00%, Series 2018A, due August 1, 2047 [Member]
Interest rate	0.00%
Due date of debt	Aug. 01, 2047
3.00% to 5.00%, Series 2018B, due August 1, 2047 [Member]
Due date of debt	Aug. 01, 2047
3.00% to 5.00%, Series 2018B, due August 1, 2047 [Member] \| Minimum [Member]
Interest rate	3.00%
3.00% to 5.00%, Series 2018B, due August 1, 2047 [Member] \| Maximum [Member]
Interest rate	5.00%
State Revolving Fund Bond 0.00%, due August 1, 2021 [Member]
Interest rate	0.00%
Construction Loans [Member]
Interest rate	0.00%

Basis of Presentation and Recent Developments

6 Months Ended

Jun. 30, 2018

Basis of Presentation and Recent Developments [Abstract]

Basis of Presentation and Recent Developments

Note 1 – Basis of Presentation and Recent Developments

Middlesex Water Company (Middlesex or the Company) is the parent company and sole shareholder of Tidewater Utilities, Inc. (Tidewater), Tidewater Environmental Services, Inc. (TESI), Pinelands Water Company (Pinelands Water) and Pinelands Wastewater Company (Pinelands Wastewater) (collectively, Pinelands), Utility Service Affiliates, Inc. (USA), Utility Service Affiliates (Perth Amboy) Inc. (USA-PA), and Twin Lakes Utilities, Inc. (Twin Lakes). Southern Shores Water Company, LLC (Southern Shores) and White Marsh Environmental Systems, Inc. (White Marsh) are wholly-owned subsidiaries of Tidewater. The financial statements for Middlesex and its wholly-owned subsidiaries (the Company) are reported on a consolidated basis. All significant intercompany accounts and transactions have been eliminated.

The consolidated notes within the 2017 Annual Report on Form 10-K (the 2017 Form 10-K) are applicable to these financial statements and, in the opinion of the Company, the accompanying unaudited condensed consolidated financial statements contain all adjustments necessary (including normal recurring accruals) to present fairly the financial position as of June 30, 2018, the results of operations for the three and six month periods ended June 30, 2018 and 2017 and cash flows for the six month periods ended June 30, 2018 and 2017. Information included in the Condensed Consolidated Balance Sheet as of December 31, 2017, has been derived from the Company’s audited financial statements for the year ended December 31, 2017 included in the 2017 Form 10-K.

Recent Developments

USA-PA currently operates the City of Perth Amboy, New Jersey’s water and wastewater systems under a 20-year agreement, which expires in December 2018. In July 2018, through a competitive proposal process, USA-PA was awarded a $67 million base professional services contract to continue to operate the water and wastewater systems through December 31, 2028.

Recent Accounting Guidance

Revenue Recognition - In May 2014, the Financial Accounting Standards Board (FASB) issued guidance, which replaces most of the existing guidance with a single set of principles for recognizing revenue from contracts with customers. The guidance was effective January 1, 2018 and did not have a material impact on the Company’s financial statements. Disclosures related to Revenue Recognition are included in Note 9, Revenue Recognition from Contracts with Customers.

Recognition and Measurement of Financial Assets and Financial Liabilities - In January 2016, the FASB issued guidance which (i) requires all investments in equity securities, including other ownership interests such as partnerships, unincorporated joint ventures and limited liability companies, to be carried at fair value through net income, (ii) requires an incremental recognition and disclosure requirement related to the presentation of fair value changes of financial liabilities for which the fair value option has been elected, (iii) amends several disclosure requirements, including the methods and significant assumptions used to estimate fair value or a description of the changes in the methods and assumptions used to estimate fair value, and (iv) requires disclosure of the fair value of financial assets and liabilities measured at amortized cost at the amount that would be received to sell the asset or paid to transfer the liability. The guidance was effective January 1, 2018 and did not have a material impact on the Company’s financial statements.

Statement of Cash Flows - In August 2016, the FASB issued guidance which amends the previous guidance on the classification of certain cash receipts and payments in the statement of cash flows. The primary purpose of the amendment is to reduce the diversity in practice that has resulted from the lack of consistent principles on this topic. The guidance was effective January 1, 2018 and did not have a material impact on the Company’s financial statements.

Restricted Cash - In November 2016, the FASB issued guidance related to the classification and presentation of restricted cash in the statement of cash flows, which requires entities to a) include restricted cash balances in its cash and cash-equivalent balances in the statement of cash flows and b) include a reconciliation of cash and cash-equivalents per the statement of financial position as compared to the statement of cash flows. Changes in restricted cash and restricted cash equivalents that result from transfers between cash, cash equivalents, and restricted cash and restricted cash equivalents will not be presented as cash flow activities in the statement of cash flows. In addition, an entity with a material balance of amounts described as restricted cash and restricted cash equivalents must disclose information about the nature of the restrictions. The guidance was effective January 1, 2018 and did not have a material impact on the Company’s financial statements. As a result of adopting this guidance, the consolidated statement of cash flows for the six months ended June 30, 2017 was revised, which resulted in a $0.4 million increase in Cash, Cash Equivalents and Restricted Cash at the Beginning and End of the Period.

Employee Benefit Plans-Net Periodic Benefit Cost – In March 2017, the FASB issued guidance which requires entities to (1) disaggregate the current-service-cost component from the other components of net benefit cost and present it with other current compensation costs for related employees in the income statement and (2) present the other components elsewhere in the income statement and outside of income from operations if that subtotal is presented. In addition, the guidance requires entities to disclose the income statement lines that contain the other components if they are not presented on appropriately described separate lines. The guidance was effective January 1, 2018 and did not have a material impact on the Company’s financial statements. See Note 8, Employee Benefit Plans for more information. As a result of adopting this guidance, the consolidated statement of income for the three and six months ended June 30, 2017 was revised, which resulted in increases in Operations and Maintenance expense and Other Income (Expense), net of $0.2 million and $0.4 million, respectively.

Leases - In February 2016, the FASB issued guidance related to leases which will require lessees to recognize a lease liability (a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis) and a right-of-use asset (an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term). In January 2018, the FASB issued additional guidance related to leases which permits entities to forgo the evaluation of existing land easement arrangements to determine if they contain a lease as part of the adoption of this guidance. Land easement arrangements, or modifications to existing arrangements, entered into after adoption of this guidance will need to be evaluated to determine if they meet the definition of a lease. The guidance is effective for fiscal years beginning after December 15, 2018 with early adoption permitted. The Company is currently assessing the impact of this standard on its consolidated financial statements and footnote disclosures, but, based on the Company’s current leasing activity, does not expect the adoption of this guidance to have a material impact on the Company’s financial statements.

There are no other new adopted or proposed accounting guidance that the Company is aware of that could have a material impact on the Company’s financial statements.

Rate and Regulatory Matters

6 Months Ended

Jun. 30, 2018

Regulated Operations [Abstract]

Rate and Regulatory Matters

Note 2 – Rate and Regulatory Matters

Middlesex – In March 2018, Middlesex’s petition to the New Jersey Board of Public Utilities (NJBPU) seeking permission to increase its base water rates was concluded, based on a negotiated settlement, resulting in an increase in annual operating revenues of $5.5 million. In its initial October 2017 filing with the NJBPU, Middlesex had sought an increase of $15.3 million to recover costs for capital infrastructure investments Middlesex has made, or has committed to make, to drinking water infrastructure since the last filing in New Jersey in 2015 as well as increased operations and maintenance costs. During the pendency of this rate matter, the Tax Cuts and Jobs Act of 2017 (the Tax Act) was signed into law. Under the Tax Act the maximum corporate income tax rate was reduced from 35% to 21% effective January 1, 2018. Because income tax is one of the cost components used to determine a regulated utility’s revenue requirement, Middlesex was able to reduce its original rate increase request by $4.9 million to $10.4 million. The new base water rates are designed to recover the increased operating costs as well as a return on invested capital in rate base of $245.5 million, based on an authorized return on equity of 9.6%. As part of the settlement, Middlesex received approval for regulatory accounting treatment of accumulated deferred income tax benefits associated with required adoption of tangible property regulations issued by the Internal Revenue Service (IRS). The settlement agreement allowed for a four-year amortization period for $28.7 million of deferred income tax benefits as well as immediate and prospective recognition of the tangible property regulations tax benefits in future years. The rate increase became effective April 1, 2018.

Tidewater - Effective July 1, 2018, Tidewater revised its Delaware Public Service Commission (DEPSC)-approved Distribution System Improvement Charge (DSIC) rate, which is expected to generate $0.2 million of revenues in 2018. A DSIC is a rate-mechanism that allows water utilities to recover investments in, and generate a return on, qualifying capital improvements to their water distribution system made between base rate proceedings.

Tax Act - On December 22, 2017, the Tax Act was signed into law making significant changes to the Internal Revenue Code, including a corporate tax rate decrease from 35% to 21% effective for tax years beginning after December 31, 2017. Tariff rates charged to customers in the Company’s regulated companies include recovery of income taxes at the statutory rate in effect at the time those rates became effective. The conclusion of Middlesex’s base rate case and the resulting rates implemented April 1, 2018 reflect the impact of the Tax Act on its revenue requirement.

In March 2018, the Company submitted compliance filings with the DEPSC proposing to reduce rates charged to its Delaware customers to reflect the impact of the Tax Act. It is uncertain at this time when the DEPSC will act upon the rate reduction proposals or whether it will accept the proposed methodologies.

As of June 30, 2018, the Company has recorded regulatory liabilities of $32.6 million for excess income taxes collected through rates due to the lower income tax rate under the Tax Act. These regulatory liabilities are overwhelmingly related to accelerated tax depreciation deduction timing differences, which are subject to IRS normalization rules. The IRS rules limit how quickly the excess taxes attributable to accelerated tax depreciation can be returned to customers.

Capitalization

6 Months Ended

Jun. 30, 2018

CAPITALIZATION:

Capitalization

Note 3 – Capitalization

Common Stock - During the six months ended June 30, 2018 and 2017, there were 15,026 shares (approximately $0.6 million) and 15,954 common shares (approximately $0.6 million), respectively, respectively, issued under the Middlesex Water Company Investment Plan.

Long-term Debt - In April 2018, the NJBPU approved Middlesex’s request to borrow up to $57.0 million under the New Jersey Infrastructure Bank (NJIB) program to fund the construction of a large-diameter transmission pipeline from the Carl J. Olsen (CJO) water treatment plant and interconnect with our distribution system. Middlesex currently expects to close on the NJIB construction loan in the third quarter of 2018 with funding requisitions beginning in August 2018 through the end of 2019.

In April 2018, the NJBPU approved Middlesex’s request to borrow up to $55.0 million under the NJIB program to fund upgrades to the Company’s CJO water treatment plant. Middlesex currently expects to close on the NJIB construction loan in the fourth quarter of 2018 with funding requisitions beginning late in 2018 and through 2020.

In March 2018, the NJBPU approved Middlesex’s request to borrow up to $14.0 million under the NJIB program to fund the 2018 RENEW Program, which is an ongoing initiative to eliminate all unlined water distribution mains in the Middlesex system. Middlesex expects to close on the NJIB construction loan in the third quarter of 2018 with funding requisitions beginning in September 2018 through early 2019.

In March 2018, the DEPSC approved Tidewater’s request to borrow up to $0.9 million under the Delaware State Revolving Fund (SRF) program to fund the replacement of an entire water distribution system of a small Delaware subdivision. Tidewater closed on the SRF loan in May 2018 and expects to complete the project in the fourth quarter of 2018.

In November 2017, Middlesex closed out three of its NJIB construction loans (booster station upgrade, RENEW 2015 and RENEW 2016 projects) by issuing to the NJIB first mortgage bonds designated as Series XX ($11.3 million) and Series YY ($3.9 million). The interest rate on the Series XX bond is zero and the interest rate on the Series YY bond range between 3.0% and 5.0%. Through June 30, 2018, Middlesex has drawn down $14.9 million and expects to draw down the remaining proceeds during the third quarter of 2018. The final maturity date for both bonds is August 1, 2047, with scheduled debt service payments over the life of the loan.

In May 2018, Middlesex closed out its RENEW 2017 construction loan by issuing to the NJIB first mortgage bonds designated as Series 2018A ($7.1 million) and Series 2018B ($2.4 million). The interest rate on the Series 2018A bond is zero and the interest rate on the Series 2018B bond ranges between 3.0% and 5.0%. Through June 30, 2018, Middlesex has drawn down $7.1 million and expects to draw down the remaining proceeds during the third quarter of 2018. The final maturity date for both bonds is August 1, 2047, with scheduled debt service payments over the life of the loan.

Fair Value of Financial Instruments - The following methods and assumptions were used by the Company in estimating its fair value disclosure for financial instruments for which it is practicable to estimate that value. The carrying amounts reflected in the condensed consolidated balance sheets for cash and cash equivalents, trade receivables, accounts payable and notes payable approximate their respective fair values due to the short-term maturities of these instruments. The fair value of First Mortgage and State Revolving Fund Bonds (collectively, the Bonds) issued by Middlesex is based on quoted market prices for similar issues. Under the fair value hierarchy, the fair value of cash and cash equivalents is classified as a Level 1 measurement and the fair value of notes payable and the Bonds in the table below are classified as Level 2 measurements. The carrying amount and fair value of the Bonds were as follows:

	June 30, 2018		December 31, 2017
	Carrying	Fair	Carrying	Fair
	Amount	Value	Amount	Value
Bonds	$ 104,449	$ 106,188	$95,322	$98,036

For other long-term debt for which there was no quoted market price and there is not an active trading market, it was not practicable to estimate their fair value (for details, including carrying value, interest rate and due date on these series of long-term debt, please refer to those series noted as “Amortizing Secured Note”, “State Revolving Trust Note” and “Construction Loans” on the Condensed Consolidated Statements of Capital Stock and Long-Term Debt). The carrying amount of these instruments was $46.8 million and $52.5 million at June 30, 2018 and December 31, 2017, respectively. Customer advances for construction have carrying amounts of $21.8 million and $21.4 million at June 30, 2018 and December 31, 2017, respectively. Their relative fair values cannot be accurately estimated since future refund payments depend on several variables, including new customer connections, customer consumption levels and future rate increases.

Earnings Per Share

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share

Note 4 – Earnings Per Share

Basic earnings per share (EPS) are computed on the basis of the weighted average number of shares outstanding during the period presented. Diluted EPS assumes the conversion of both the Convertible Preferred Stock $7.00 Series and the Convertible Preferred Stock $8.00 Series.

	(In Thousands Except per Share Amounts)
	Three Months Ended June 30,
	2018					2017
Basic:	Income			Shares		Income			Shares
Net Income	$	8,675			16,388	$	5,381			16,332
Preferred Dividend		(36	)				(36	)
Earnings Applicable to Common Stock	$	8,639			16,388	$	5,345			16,332

Basic EPS	$	0.53				$	0.33

Diluted:
Earnings Applicable to Common Stock	$	8,639			16,388	$	5,345			16,332
$7.00 Series Preferred Dividend		17			115		17			115
$8.00 Series Preferred Dividend		6			41		6			41
Adjusted Earnings Applicable to Common Stock	$	8,662			16,544	$	5,368			16,488

Diluted EPS	$	0.52				$	0.33

	(In Thousands Except per Share Amounts)
	Six Months Ended June 30,
	2018					2017
Basic:	Income			Shares		Income			Shares
Net Income	$	13,169			16,371	$	9,822			16,316
Preferred Dividend		(72	)				(72	)
Earnings Applicable to Common Stock	$	13,097			16,371	$	9,750			16,316

Basic EPS	$	0.80				$	0.60

Diluted:
Earnings Applicable to Common Stock	$	13,097			16,371	$	9,750			16,316
$7.00 Series Preferred Dividend		34			115		34			115
$8.00 Series Preferred Dividend		12			41		12			41
Adjusted Earnings Applicable to Common Stock	$	13,143			16,527	$	9,796			16,472

Diluted EPS	$	0.80				$	0.59

Business Segment Data

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Business Segment Data

Note 5 – Business Segment Data

The Company has identified two reportable segments. One is the regulated business of collecting, treating and distributing water on a retail and wholesale basis to residential, commercial, industrial and fire protection customers in parts of New Jersey, Delaware and Pennsylvania. This segment also includes regulated wastewater systems in New Jersey and Delaware. The Company is subject to regulations as to its rates, services and other matters by New Jersey, Delaware and Pennsylvania with respect to utility services within these states. The other segment is primarily comprised of non-regulated contract services for the operation and maintenance of municipal and private water and wastewater systems in New Jersey and Delaware. Inter-segment transactions relating to operational costs are treated as pass-through expenses. Finance charges on inter-segment loan activities are based on interest rates that are below what would normally be charged by a third party lender.

	(In Thousands)
	Three Months Ended						Six Months Ended
	June 30,						June 30,
Operations by Segments:	2018			2017			2018			2017
Revenues:
Regulated	$	31,168		$	29,278		$	58,374		$	55,771
Non – Regulated		3,882			3,863			7,982			7,613
Inter-segment Elimination		(131	)		(127	)		(260	)		(239	)
Consolidated Revenues	$	34,919		$	33,014		$	66,096		$	63,145

Operating Income:
Regulated	$	9,988		$	8,672		$	15,613		$	15,687
Non – Regulated		733			686			1,458			1,246
Consolidated Operating Income	$	10,721		$	9,358		$	17,071		$	16,933

Net Income:
Regulated	$	8,151		$	4,972		$	12,134		$	9,111
Non – Regulated		524			409			1,035			711
Consolidated Net Income	$	8,675		$	5,381		$	13,169		$	9,822

Capital Expenditures:
Regulated	$	18,350		$	11,588		$	28,328		$	21,160
Non – Regulated		16			—			49			5
Total Capital Expenditures	$	18,366		$	11,588		$	28,377		$	21,165

	As of			As of
	June 30,			December 31,
	2018			2017
Assets:
Regulated	$	732,592		$	661,816
Non – Regulated		6,819			7,093
Inter-segment Elimination		(9,667	)		(7,769	)
Consolidated Assets	$	729,744		$	661,140

Short-term Borrowings

6 Months Ended

Jun. 30, 2018

Short-term Debt [Abstract]

Short-term Borrowings

Note 6 – Short-term Borrowings

As of June 30, 2018, the Company has established lines of credit aggregating $92.0 million. At June 30, 2018, the outstanding borrowings under these credit lines were $39.0 million at a weighted average interest rate of 3.18%.

The weighted average daily amounts of borrowings outstanding under the Company’s credit lines and the weighted average interest rates on those amounts were as follows:

	(In Thousands)
	Three Months				Six Months
	June 30,				June 30,
	2018		2017		2018		2017
Average Daily Amounts Outstanding	$	31,555	$	15,582	$	29,721	$	14,221
Weighted Average Interest Rates		3.10%		2.08%		2.94%		1.95%

The maturity dates for the $39.0 million outstanding as of June 30, 2018 are in July 2018 through September 2018 and are extendable at the discretion of the Company.

Interest rates for short-term borrowings under the lines of credit are below the prime rate with no requirement for compensating balances.

Commitments and Contingent Liabilities

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingent Liabilities

Note 7 – Commitments and Contingent Liabilities

Water Supply - Middlesex has an agreement with the New Jersey Water Supply Authority (NJWSA) for the purchase of untreated water through November 30, 2023, which provides for an average purchase of 27.0 million gallons a day (mgd). Pricing is set annually by the NJWSA through a public rate making process. The agreement has provisions for additional pricing in the event Middlesex overdrafts or exceeds certain monthly and annual thresholds.

Middlesex also has an agreement with a non-affiliated regulated water utility for the purchase of treated water. This agreement, which expires February 27, 2021, provides for the minimum purchase of 3.0 mgd of treated water with provisions for additional purchases.

Tidewater contracts with the City of Dover, Delaware to purchase 15.0 million gallons of treated water annually.

Purchased water costs are shown below:

	(In Thousands)
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017

Treated	$	703	$	795	$	1,591	$	1,574
Untreated		850		573		1,780		1,232
Total Costs	$	1,553	$	1,368	$	3,371	$	2,806

Guarantees - As part of an agreement with the County of Monmouth, New Jersey (County), Middlesex serves as guarantor of the performance of Applied Water Management, Inc. (AWM), an unaffiliated wastewater treatment contractor, to operate a County-owned leachate pretreatment facility at the Monmouth County Reclamation Center in Tinton Falls, New Jersey. The performance guaranty is effective through 2028 unless another guarantor, acceptable to the County, replaces Middlesex before such date. Under agreements with AWM and Natural Systems Utilities, LLC (NSU), the parent company of AWM, Middlesex earns a fee for providing the performance guaranty. In addition, Middlesex may provide operational support to the facility, as needed, and AWM and NSU, serving as guarantor to Middlesex with respect to the performance of AWM, agree to indemnify Middlesex against any claims that may arise under the Middlesex guaranty to the County.

If requested to perform under the guaranty to the County and, if AWM and NSU, as guarantor to Middlesex, do not fulfill their obligations to indemnify Middlesex against any claims that may arise under the Middlesex guaranty to the County, Middlesex would be required to fulfill the remaining operational commitment of AWM. As of both June 30, 2018 and December 31, 2017, the liability recognized in Other Non-Current Liabilities on the balance sheet for the guaranty is less than $0.1 million.

Leases - The Company has entered into office space operating leases. Rental expenses under operating leases were less than $0.1 million for each of the six months ended June 30, 2018 and 2017. The operating leases for these facilities will expire in 2028.

Construction - The Company has forecasted to spend approximately $78 million for its construction program in 2018. The actual timing and amount of capital expenditures is dependent on project scheduling and refinement of engineering estimates for certain projects.

Litigation - The Company is a defendant in lawsuits in the normal course of business. We believe the resolution of pending claims and legal proceedings will not have a material adverse effect on the Company’s consolidated financial statements.

Change in Control Agreements - The Company has Change in Control Agreements with certain of its officers that provide compensation and benefits in the event of termination of employment in connection with a change in control of the Company.

Employee Benefit Plans

6 Months Ended

Jun. 30, 2018

Retirement Benefits [Abstract]

Employee Benefit Plans

Note 8 – Employee Benefit Plans

Pension Benefits - The Company’s Pension Plan covers all active employees hired prior to April 1, 2007. For the three months ended June 30, 2018 and 2017, the Company made Pension Plan cash contributions of $0.8 million and $1.0 million, respectively. For the six months ended June 30, 2018 and 2017, the Company made Pension Plan cash contributions of $1.3 million and $1.5 million, respectively. The Company expects to make Pension Plan cash contributions of approximately $2.0 million over the remainder of the current year. Employees hired after March 31, 2007 are not eligible to participate in this plan, but do participate in a defined contribution plan that provides an annual contribution at the discretion of the Company, based upon a percentage of the participants’ eligible compensation. In order to be eligible for a contribution, the participant must be employed by the Company on December 31st of the year to which the contribution relates. The Company also maintains an unfunded supplemental retirement benefit plan for certain active and retired Company officers and currently pays $0.3 million in annual benefits to the retired participants.

Other Postretirement Benefits - The Company’s retirement plan other than pensions (Other Benefits Plan) covers substantially all of its current retired employees. Employees hired after March 31, 2007 are not eligible to participate in this plan. Coverage includes healthcare and life insurance. For each of the three months ended June 30, 2018 and 2017, the Company made Other Benefits Plan cash contributions of $0.2 million, respectively. For each of the six months ended June 30, 2018 and 2017, the Company made Other Benefits Plan cash contributions of $0.4 million and $0.2 million, respectively. The Company expects to make Other Benefits Plan cash contributions of approximately $1.2 million over the remainder of the current year.

The following tables set forth information relating to the Company’s periodic costs for its employee retirement benefit plans:

	(In Thousands)
	Pension Benefits						Other Benefits
	Three Months Ended June 30,
	2018			2017			2018			2017

Service Cost	$	607		$	600		$	284		$	272
Interest Cost		765			786			474			491
Expected Return on Assets		(1,218	)		(1,122	)		(637	)		(601	)
Amortization of Unrecognized Losses		415			391			447			445
Amortization of Unrecognized Prior Service Cost (Credit)		—			—			(402	)		(432	)
Net Periodic Benefit Cost*	$	569		$	655		$	166		$	175

	Pension Benefits						Other Benefits
	Six Months Ended June 30,
	2018			2017			2018			2017

Service Cost	$	1,213		$	1,200		$	567		$	544
Interest Cost		1,530			1,572			949			982
Expected Return on Assets		(2,435	)		(2,245	)		(1,275	)		(1,203	)
Amortization of Unrecognized Losses		829			783			894			890
Amortization of Unrecognized Prior Service Cost (Credit)		—			—			(803	)		(864	)
Net Periodic Benefit Cost*	$	1,137		$	1,310		$	332		$	349

*Service cost is included in Operations and Maintenance expense on Consolidated Statements of Income; all other amounts are included in Other Income/Expense, net.

Revenue Recognition from Contracts with Customers

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Revenue Recognition from Contracts with Customers

Note 9 – Revenue Recognition from Contracts with Customers

The Company’s revenues are primarily generated from regulated tariff-based sales of water and wastewater services and non-regulated operation and maintenance contracts for services on water and wastewater systems owned by others. Revenue from contracts with customers is recognized when control of a promised good or service is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services.

The Company’s regulated revenue from contracts with customers is derived from tariff-based sales that result from the obligation to provide water and wastewater services to residential, industrial, commercial, fire-protection and wholesale customers. The Company’s residential customers are billed quarterly while most of the Company’s industrial, commercial, fire-protection and wholesale customers are billed monthly. Payments by customers are due between 15 to 30 days after the invoice date. The Company recognizes revenue as the water and wastewater services are delivered to customers as well as records unbilled revenues estimated from the last meter reading date to the end of the accounting period utilizing factors such as historical customer data, regional weather indicators and general economic conditions in its service territories. Unearned Revenues and Advance Service Fees include fixed service charge billings in advance to Tidewater customers that are recognized as service is provided to the customer.

Non-regulated service contract revenues consist of base service fees as well as fees for additional billable services provided to customers, are billed monthly and are due within 30 days after the invoice date. The Company considers the amounts billed to represent the value of these services provided to customers. These contracts expire between December 2018 and 2022 and thus contain remaining performance obligations for which the Company expects to recognize revenue in the future. These contracts also contain customary termination provisions.

Almost all of the amounts included in operating revenues and accounts receivable are from contracts with customers. The Company records its allowance for doubtful accounts based on historical write-offs combined with an evaluation of current economic conditions within its service territories.

The Company’s contracts do not contain any significant financing components.

The Company’s operating revenues are comprised of the following:

	(In Thousands)
	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Regulated Tariff Sales
Residential	$	17,892		$	17,024		$	33,515		$	32,183
Commercial		3,771			3,493			6,880			6,447
Industrial		2,689			2,395			5,001			4,578
Fire Protection		3,073			2,911			5,961			5,824
Wholesale		3,680			3,397			6,892			6,631
Non-Regulated Contract Operations		3,781			3,762			7,780			7,411
Total Revenue from Contracts with Customers	$	34,886		$	32,982		$	66,029		$	63,074
Other Regulated Revenues		63			48			125			98
Other Non-Regulated Revenues		101			111			202			212
Inter-segment Elimination		(131	)		(127	)		(260	)		(239	)
Total Revenue	$	34,919		$	33,014		$	66,096		$	63,145

Income Taxes

6 Months Ended

Jun. 30, 2018

Income Tax Disclosure [Abstract]

Income Taxes

Note 10 – Income Taxes

As part of its 2014 Federal income tax return, the Company adopted the final IRS tangible property regulations and changed its accounting method for the tax treatment of expenditures that qualified as deductible repairs. The adoption resulted in a net reduction of $17.6 million in taxes previously remitted to the IRS, for which the Company has already sought and received the tax refunds. While the Company believes that its treatment of qualifying tangible property repair costs is proper, a reserve provision against refunded taxes of $2.3 million was recorded in 2015 at the time of filing its change in accounting method. This was based on a possible challenge by the IRS during an audit examination. The Company’s 2014 federal income tax return was subsequently selected for examination by the IRS in 2016. During the second quarter of 2018, the Company received information from the IRS regarding certain aspects of the its adopted accounting method used to calculate qualifying tangible property repair cost deductions and has determined that it should increase its reserve provision to $3.7 million. As the IRS examination continues and pending its completion, the tax liability could be different than the recorded reserve provision. For the three and six months ended June 30, 2018, the Company has recorded $0.4 million in interest expense due to this reserve provision.

Capitalization (Tables)

6 Months Ended

Jun. 30, 2018

CAPITALIZATION:

Schedule of carrying amount and fair value of bonds

The carrying amount and fair value of the Bonds were as follows:

	June 30, 2018		December 31, 2017
	Carrying	Fair	Carrying	Fair
	Amount	Value	Amount	Value
Bonds	$ 104,449	$ 106,188	$95,322	$98,036

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Schedule of earnings per share

	(In Thousands Except per Share Amounts)
	Three Months Ended June 30,
	2018					2017
Basic:	Income			Shares		Income			Shares
Net Income	$	8,675			16,388	$	5,381			16,332
Preferred Dividend		(36	)				(36	)
Earnings Applicable to Common Stock	$	8,639			16,388	$	5,345			16,332

Basic EPS	$	0.53				$	0.33

Diluted:
Earnings Applicable to Common Stock	$	8,639			16,388	$	5,345			16,332
$7.00 Series Preferred Dividend		17			115		17			115
$8.00 Series Preferred Dividend		6			41		6			41
Adjusted Earnings Applicable to Common Stock	$	8,662			16,544	$	5,368			16,488

Diluted EPS	$	0.52				$	0.33

	(In Thousands Except per Share Amounts)
	Six Months Ended June 30,
	2018					2017
Basic:	Income			Shares		Income			Shares
Net Income	$	13,169			16,371	$	9,822			16,316
Preferred Dividend		(72	)				(72	)
Earnings Applicable to Common Stock	$	13,097			16,371	$	9,750			16,316

Basic EPS	$	0.80				$	0.60

Diluted:
Earnings Applicable to Common Stock	$	13,097			16,371	$	9,750			16,316
$7.00 Series Preferred Dividend		34			115		34			115
$8.00 Series Preferred Dividend		12			41		12			41
Adjusted Earnings Applicable to Common Stock	$	13,143			16,527	$	9,796			16,472

Diluted EPS	$	0.80				$	0.59

Business Segment Data (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Schedule of segment reporting information, by segment

Finance charges on inter-segment loan activities are based on interest rates that are below what would normally be charged by a third party lender.

	(In Thousands)
	Three Months Ended						Six Months Ended
	June 30,						June 30,
Operations by Segments:	2018			2017			2018			2017
Revenues:
Regulated	$	31,168		$	29,278		$	58,374		$	55,771
Non – Regulated		3,882			3,863			7,982			7,613
Inter-segment Elimination		(131	)		(127	)		(260	)		(239	)
Consolidated Revenues	$	34,919		$	33,014		$	66,096		$	63,145

Operating Income:
Regulated	$	9,988		$	8,672		$	15,613		$	15,687
Non – Regulated		733			686			1,458			1,246
Consolidated Operating Income	$	10,721		$	9,358		$	17,071		$	16,933

Net Income:
Regulated	$	8,151		$	4,972		$	12,134		$	9,111
Non – Regulated		524			409			1,035			711
Consolidated Net Income	$	8,675		$	5,381		$	13,169		$	9,822

Capital Expenditures:
Regulated	$	18,350		$	11,588		$	28,328		$	21,160
Non – Regulated		16			—			49			5
Total Capital Expenditures	$	18,366		$	11,588		$	28,377		$	21,165

	As of			As of
	June 30,			December 31,
	2018			2017
Assets:
Regulated	$	732,592		$	661,816
Non – Regulated		6,819			7,093
Inter-segment Elimination		(9,667	)		(7,769	)
Consolidated Assets	$	729,744		$	661,140

Short-term Borrowings (Tables)

6 Months Ended

Jun. 30, 2018

Shortterm Borrowings Tables Abstract

Schedule of Credit Lines

The weighted average daily amounts of borrowings outstanding under the Company’s credit lines and the weighted average interest rates on those amounts were as follows:

	(In Thousands)
	Three Months				Six Months
	June 30,				June 30,
	2018		2017		2018		2017
Average Daily Amounts Outstanding	$	31,555	$	15,582	$	29,721	$	14,221
Weighted Average Interest Rates		3.10%		2.08%		2.94%		1.95%

Commitments and Contingent Liabilities (Tables)

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of purchased water cost

Purchased water costs are shown below:

	(In Thousands)
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017

Treated	$	703	$	795	$	1,591	$	1,574
Untreated		850		573		1,780		1,232
Total Costs	$	1,553	$	1,368	$	3,371	$	2,806

Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2018

Retirement Benefits [Abstract]

Schedule of periodic costs for employee retirement benefit plan

The following tables set forth information relating to the Company’s periodic costs for its employee retirement benefit plans:

	(In Thousands)
	Pension Benefits						Other Benefits
	Three Months Ended June 30,
	2018			2017			2018			2017

Service Cost	$	607		$	600		$	284		$	272
Interest Cost		765			786			474			491
Expected Return on Assets		(1,218	)		(1,122	)		(637	)		(601	)
Amortization of Unrecognized Losses		415			391			447			445
Amortization of Unrecognized Prior Service Cost (Credit)		—			—			(402	)		(432	)
Net Periodic Benefit Cost*	$	569		$	655		$	166		$	175

	Pension Benefits						Other Benefits
	Six Months Ended June 30,
	2018			2017			2018			2017

Service Cost	$	1,213		$	1,200		$	567		$	544
Interest Cost		1,530			1,572			949			982
Expected Return on Assets		(2,435	)		(2,245	)		(1,275	)		(1,203	)
Amortization of Unrecognized Losses		829			783			894			890
Amortization of Unrecognized Prior Service Cost (Credit)		—			—			(803	)		(864	)
Net Periodic Benefit Cost*	$	1,137		$	1,310		$	332		$	349

*Service cost is included in Operations and Maintenance expense on Consolidated Statements of Income; all other amounts are included in Other Income/Expense, net.

Revenue Recognition from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Schedule of Operating Revenue

The Company’s operating revenues are comprised of the following:

	(In Thousands)
	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Regulated Tariff Sales
Residential	$	17,892		$	17,024		$	33,515		$	32,183
Commercial		3,771			3,493			6,880			6,447
Industrial		2,689			2,395			5,001			4,578
Fire Protection		3,073			2,911			5,961			5,824
Wholesale		3,680			3,397			6,892			6,631
Non-Regulated Contract Operations		3,781			3,762			7,780			7,411
Total Revenue from Contracts with Customers	$	34,886		$	32,982		$	66,029		$	63,074
Other Regulated Revenues		63			48			125			98
Other Non-Regulated Revenues		101			111			202			212
Inter-segment Elimination		(131	)		(127	)		(260	)		(239	)
Total Revenue	$	34,919		$	33,014		$	66,096		$	63,145

Basis of Presentation and Recent Developments (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Jul. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Product Information [Line Items]
Cash, Cash Equivalents and Restricted Cash			$ 400
Other Income (Expense)		$ 200		$ 400
Wastewater system description			<p class="MsoNormal" style="text-align: justify">USA-PA currently operates the City of Perth Amboy, New Jersey's water and wastewater systems under a 20-year agreement, which expires in December 2018.</p>
Subsequent Event [Member]
Product Information [Line Items]
Professional services contract	$ 67,000

Rate and Regulatory Matters (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Oct. 17, 2017	Jun. 30, 2018	Jun. 30, 2017
Regulatory Liabilities [Line Items]
Deferred income tax benefits		$ (2,760)	$ 4,395
Regulatory liabilities		$ 32,600
Minimum [Member]
Regulatory Liabilities [Line Items]
Corporate tax rate		21.00%
Base rate amount		$ 4,900
Maximum [Member]
Regulatory Liabilities [Line Items]
Corporate tax rate		35.00%
Base rate amount		$ 10,400
Middlesex [Member]
Regulatory Liabilities [Line Items]
Base rate amount	$ 15,300
Deferred income tax benefits		$ 28,700
Amortization period		4 years
Middlesex [Member] \| New Jersey Board Of Public Utilities [Member]
Regulatory Liabilities [Line Items]
Approved increase in annual operating revenues		$ 5,500
Base rate amount		$ 245,500
Return on equity		9.60%
Tidewater Utilities Inc [Member]
Regulatory Liabilities [Line Items]
Projected annual revenue		$ 200

Capitalization (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended		6 Months Ended
	May 31, 2018	Nov. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Apr. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Schedule of Capitalization [Line Items]
Issuance of shares under the DRP, shares			15,026	15,954
Issuance of shares under the DRP			$ 600	$ 600
Other long term debt			46,800				$ 52,500
Customer advances			21,832				$ 21,423
Amount drawn			5,567	$ 4,047
New Jersey Infrastructure Bank [Member]
Schedule of Capitalization [Line Items]
Amount drawn			14,900
Middlesex [Member]
Schedule of Capitalization [Line Items]
Amount drawn			$ 7,100
Series XX [Member]
Schedule of Capitalization [Line Items]
Proceeds from issuance of first mortgage bond		$ 11,300
Interest rate		0.00%
Due date of debt		Aug. 01, 2047
Series YY [Member]
Schedule of Capitalization [Line Items]
Proceeds from issuance of first mortgage bond		$ 3,900
Due date of debt		Aug. 01, 2047
Series YY [Member] \| Minimum [Member]
Schedule of Capitalization [Line Items]
Interest rate		3.00%
Series YY [Member] \| Maximum [Member]
Schedule of Capitalization [Line Items]
Interest rate		5.00%
Series 2018A [Member]
Schedule of Capitalization [Line Items]
Proceeds from issuance of first mortgage bond	$ 7,100
Interest rate	0.00%
Due date of debt	Aug. 01, 2047
Series 2018B [Member]
Schedule of Capitalization [Line Items]
Proceeds from issuance of first mortgage bond	$ 2,400
Due date of debt	Aug. 01, 2047
Series 2018B [Member] \| Minimum [Member]
Schedule of Capitalization [Line Items]
Interest rate	3.00%
Series 2018B [Member] \| Maximum [Member]
Schedule of Capitalization [Line Items]
Interest rate	5.00%
New Jersey NJIB Program [Member]
Schedule of Capitalization [Line Items]
Maximum borrowing amount					$ 57,000	$ 14,000
Maximum borrowing capacity, construction loan					$ 55,000
Delaware State Revolving Fund [Member]
Schedule of Capitalization [Line Items]
Maximum borrowing amount						$ 900

Capitalization (Schedule of Carrying Amount and Fair Value of Bonds) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Carrying Amount [Member]
First Mortgage Bonds	$ 104,449	$ 95,322
Fair Value [Member]
First Mortgage Bonds	$ 106,188	$ 98,036

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic:
Net Income	$ 8,675	$ 5,381	$ 13,169	$ 9,822
Preferred Dividend	(36)	(36)	(72)	(72)
Earnings Applicable to Common Stock	$ 8,639	$ 5,345	$ 13,097	$ 9,750
Basic EPS	$ 0.53	$ 0.33	$ 0.80	$ 0.60
Weighted average number of basic shares outstanding	16,388	16,332	16,371	16,316
Diluted:
Adjusted Earnings Applicable to Common Stock	$ 8,662	$ 5,368	$ 13,143	$ 9,796
Diluted EPS	$ 0.52	$ 0.33	$ 0.80	$ 0.59
Weighted average number of diluted shares outstanding	16,544	16,488	16,527	16,472
Convertible Preferred Stock $7.00 Series [Member]
Diluted:
Preferred Dividend	$ 17	$ 17	$ 34	$ 34
Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock (in shares)	115	115	115	115
Convertible Preferred Stock $8.00 Series [Member]
Diluted:
Preferred Dividend	$ 6	$ 6	$ 12	$ 12
Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock (in shares)	41	41	41	41

Business Segment Data (Details) $ in Thousands	3 Months Ended		6 Months Ended
Business Segment Data (Details) $ in Thousands	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments			2	2
Operating Revenues	$ 34,919	$ 33,014	$ 66,096	$ 63,145
Operating Income	10,721	9,358	17,071	16,933
Net Income	8,675	5,381	13,169	9,822
Capital Expenditures	18,366	11,588	28,377	21,165
Assets	729,744		729,744		$ 661,140
Regulated [Member]
Segment Reporting Information [Line Items]
Operating Revenues	31,168	29,278	58,374	55,771
Operating Income	9,988	8,672	15,613	15,687
Net Income	8,151	4,972	12,134	9,111
Capital Expenditures	18,350	11,588	28,328	21,160
Assets	732,592		732,592		661,816
Non - Regulated [Member]
Segment Reporting Information [Line Items]
Operating Revenues	3,882	3,863	7,982	7,613
Operating Income	733	686	1,458	1,246
Net Income	524	409	1,035	711
Capital Expenditures	16		49	5
Assets	6,819		6,819		7,093
Inter-segment Elimination [Member]
Segment Reporting Information [Line Items]
Operating Revenues	(131)	$ (127)	(260)	$ (239)
Assets	$ (9,667)		$ (9,667)		$ (7,769)

Short-term Borrowings (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Short-term Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Lines Of Credit Facility
Established lines of credit	$ 92,000		$ 92,000
Established lines of credit, amount outstanding	$ 39,000		$ 39,000
Weighted average interest rate at period end	3.18%		3.18%
Average Daily Amounts Outstanding	$ 31,555	$ 15,582	$ 29,721	$ 14,221
Weighted Average Interest Rates	3.10%	2.08%	2.94%	1.95%

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details

Commitments and Contingent Liabilities (Narrative) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($) gal	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Guaranty liabilty for AWM's performance \| $	$ 100		$ 100
Budgeted construction cost for construction program, 2018 \| $	78,000
Rental expenses under operating leases \| $	$ 100	$ 100
NJ Water Supply Authority [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase commitment expiration date of contract	Nov. 30, 2023
Water purchase per commitment \| gal	27,000,000
Regulated Water Authority [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase commitment expiration date of contract	Feb. 27, 2021
Water purchase per commitment \| gal	3,000,000
City of Dover [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Water purchase per commitment \| gal	15,000,000

Commitments and Contingent Liabilities (Schedule of Purchased Water Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Purchased Water
Treated	$ 703	$ 795	$ 1,591	$ 1,574
Untreated	850	573	1,780	1,232
Total Costs	$ 1,553	$ 1,368	$ 3,371	$ 2,806

Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Annual benefits paid to retired participants			$ 300
Other Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Benfit plan, cash contributions	$ 200	$ 200	400	$ 200
Expected cash contributions	1,200		1,200
Pension Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Benfit plan, cash contributions	800	$ 1,000	1,300	$ 1,500
Expected cash contributions	$ 2,000		$ 2,000

Employee Benefit Plans (Schedule of Benefits Plans) (Details) - USD ($)
$ in Thousands

3 Months Ended

6 Months Ended

Jun. 30, 2018

Jun. 30, 2017

Jun. 30, 2018

Jun. 30, 2017

Pension Benefit Plan [Member]

Periodic costs for employee retirement benefit plans

Service Cost

$ 607

$ 600

$ 1,213

$ 1,200

Interest Cost

765

786

1,530

1,572

Expected Return on Assets

(1,218)

(1,122)

(2,435)

(2,245)

Amortization of Unrecognized Losses

415

391

829

783

Amortization of Unrecognized Prior Service Cost (Credit)

Net Periodic Benefit Cost

^[1]

569

655

1,137

1,310

Other Benefits Plan [Member]

Periodic costs for employee retirement benefit plans

Service Cost

284

272

567

544

Interest Cost

474

491

949

982

Expected Return on Assets

(637)

(601)

(1,275)

(1,203)

Amortization of Unrecognized Losses

447

445

894

890

Amortization of Unrecognized Prior Service Cost (Credit)

(402)

(432)

(803)

(864)

Net Periodic Benefit Cost

^[1]

$ 166

$ 175

$ 332

$ 349

[1]	Service cost is included in Operations and Maintenance expense on Consolidated Statements of Income; all other amounts are included in Other Income/Expense, net.

Revenue Recognition from Contracts with Customers (Schedule of Operating Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Regulated Tariff Sales
Residential	$ 17,892	$ 17,024	$ 33,515	$ 32,183
Commercial	3,771	3,493	6,880	6,447
Industrial	2,689	2,395	5,001	4,578
Fire Protection	3,073	2,911	5,961	5,824
Wholesale	3,680	3,397	6,892	6,631
Non-Regulated Contract Operations	3,781	3,762	7,780	7,411
Total Revenue from Contracts with Customers	34,886	32,982	66,029	63,074
Other Regulated Revenues	63	48	125	98
Other Non-Regulated Revenues	101	111	202	212
Inter-segment Elimination	(131)	(127)	(260)	(239)
Total Revenue	$ 34,919	$ 33,014	$ 66,096	$ 63,145

Income Taxes (Details) - Tax Year 2014 [Member] - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Net reduction in taxes due to the federal government	$ 17,600
Income tax refund receivable	3,700	$ 2,300
Interest expense	$ 400