Purchased Water:
Utilities Operating Expense [Abstract]
Cash dividends on Common Stock (in dollars per share)
Common Stock, Dividends, Per Share, Cash Paid
Materials & Supplies
Increase (Decrease) in Raw Materials, Packaging Materials and Supplies Inventories
Statistical Measurement [Domain]
Statistical Measurement [Domain]
TOTAL CAPITALIZATION
Capitalization, Long-Term Debt and Equity
Schedule of Weighted Average Daily Amounts of Borrowings Outstanding and Weighted Average Interest Rates
Schedule of Short-Term Debt [Table Text Block]
Expected Return on Assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Award Timing Predetermined
Award Timing Predetermined [Flag]
2025
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year
Entity File Number
Entity File Number
Tabular List, Table
Tabular List [Table Text Block]
Basic:
Earnings Per Share, Basic [Abstract]
Weighted average price per share of shares issued and sold under agreement (in dollars per share)
Sale Of Stock, Weighted Average Price Per Share
Sale Of Stock, Weighted Average Price Per Share
Recent Accounting Guidance
New Accounting Pronouncements, Policy [Policy Text Block]
Company cash contributions to Pension Plan
Payment for Pension Benefits
Accounts Payable
Increase (Decrease) in Accounts Payable
Untreated
Cost of Purchased Water, Untreated
Refers to cost of untreated water during the period.
Trading Arrangements, by Individual
Trading Arrangements, by Individual [Table]
Measurement Basis [Axis]
Measurement Basis [Axis]
Employee Benefit Plans
Employee Benefit Plans
Employee Benefit Plans.
Basic (in dollars per share)
Basic EPS (in dollars per share)
Earnings Per Share, Basic
Adjustment to Compensation:
Adjustment to Compensation [Axis]
LSLR
Lead Service Line Replacement Plan [Member]
Lead Service Line Replacement Plan
Schedule of Lines of Credit
Schedule of Line of Credit Facilities [Table Text Block]
Named Executive Officers, Footnote
Named Executive Officers, Footnote [Text Block]
Number of shares approved to issue and sell (in shares)
Common Stock, Capital Shares Reserved for Future Issuance
Revenue Recognition from Contracts with Customers
Revenue from Contract with Customer [Text Block]
Rate and Regulatory Matters
Public Utilities Disclosure [Text Block]
Maximum number of shares petitioned to issue and sell during offering (in shares)
Sale Of Stock, Maximum Number Of Shares Issuable In Future Transaction
Sale Of Stock, Maximum Number Of Shares Issuable In Future Transaction
Payment of Preferred Dividends
Payments of Ordinary Dividends, Preferred Stock and Preference Stock
Stock, Class of Stock [Table]
Stock, Class of Stock [Table]
Unbilled Revenues
Unbilled Receivables, Current
Schedule of Segment Transactions
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Outstanding
Short-Term Debt
Restricted Stock Award - Net - Employees (in shares)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures
Adjustment to Compensation, Amount
Adjustment to Compensation Amount
Pension Benefits
Pension Plan [Member]
Weighted Average Interest Rates
Short-Term Debt, Weighted Average Interest Rate, over Time
Stock Compensation Expense
Share-Based Payment Arrangement, Noncash Expense
Employee Stock Option
Share-Based Payment Arrangement, Option [Member]
Award Timing MNPI Disclosure
Award Timing MNPI Disclosure [Text Block]
Initial settlement payment from defendant
Litigation Settlement, Amount Awarded from Other Party
Cash Dividends on Common Stock ($0.3250 per share)
Dividends, Common Stock, Cash
Balance at beginning of period
Balance at end of period
Equity, Attributable to Parent
Insider Trading Policies and Procedures [Line Items]
Public Utilities, Regulatory Proceeding [Domain]
Public Utilities, Regulatory Proceeding [Domain]
Common stock, authorized (in shares)
Common Stock, Shares Authorized
At-The-Market Program Common Stock Issuance (in shares)
Number of common shares issued (in shares)
Stock Issued During Period, Shares, New Issues
CURRENT ASSETS:
Assets, Current [Abstract]
Nonredeemable Preferred Stock $7.00 Series
Nonredeemable Preferred Stock, $7.00 Series [Member]
Nonredeemable Preferred Stock, $7.00 Series
TOTAL CAPITALIZATION AND LIABILITIES
Liabilities and Equity
Recovered Costs-Environmental Litigation Settlement
Increase (Decrease) In Recovered Costs From Environmental Litigation Settlement
Recovered Costs-Environmental Litigation Settlement amount increase (decrease).
CAPITALIZATION AND LIABILITIES
Liabilities and Equity [Abstract]
Cover [Abstract]
Cover [Abstract]
Portion at Fair Value Measurement
Portion at Fair Value Measurement [Member]
Maximum
Maximum
Maximum [Member]
Long-term Debt:
Long-Term Debt, Unclassified [Abstract]
Total Capital Expenditures
Segment, Expenditure, Addition to Long-Lived Assets
Approved recovery of costs
Approved Recovery Of Costs, Amount
Approved Recovery Of Costs, Amount
Accounting Policies [Abstract]
Accounting Policies [Abstract]
Schedule of Future Minimum Operating Lease Commitments
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Non-PEO NEO Average Total Compensation Amount
Non-PEO NEO Average Total Compensation Amount
Adjustment to Non-PEO NEO Compensation Footnote
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
Pay vs Performance Disclosure [Line Items]
Southern Shores
Southern Shores Water Company, LLC [Member]
Southern Shores Water Company, LLC
Present Value of Lease Payments
Operating Lease, Liability
Retirement Benefits [Abstract]
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Non-Rule 10b5-1 Arrangement Terminated
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Depreciation and Amortization
Depreciation, Depletion and Amortization, Nonproduction
Entity Shell Company
Entity Shell Company
Other
Other Liabilities, Noncurrent
Regulatory Asset [Line Items]
Regulatory Asset [Line Items]
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Operating Segments
Operating Segments [Member]
Utility Plant Expenditures, Including AFUDC-Debt of $483 in 2025 and $322 in 2024
Payment For Utility Plant Capital Expenditures
Payment For Utility Plan Expenditures
Less: Current Portion of Long-term Debt
Long-Term Debt, Current Maturities
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Company Selected Measure Amount
Company Selected Measure Amount
2028
Lessee, Operating Lease, Liability, to be Paid, Year Three
Award Timing MNPI Considered
Award Timing MNPI Considered [Flag]
Line of Credit Facility [Table]
Line of Credit Facility [Table]
Short-Term Debt [Abstract]
Short-Term Debt [Abstract]
Name
Measure Name
Less Current Portion
Operating Lease, Liability, Current
Secured Debt
Secured Debt [Member]
Class of Stock [Line Items]
Class of Stock [Line Items]
Accumulated Deferred Income Taxes
Deferred Income Tax Liabilities, Net
Non-utility Assets - Net
Non-Utility Assets, Net, Noncurrent
Represents the amount of non-utility assets - net.
Transmission and Distribution
Public Utilities, Property, Plant and Equipment, Transmission and Distribution
Document Fiscal Period Focus
Document Fiscal Period Focus
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accrued Taxes
Increase (Decrease) in Accrued Taxes Payable
Award Timing Method
Award Timing Method [Text Block]
Litigation Case [Domain]
Litigation Case [Domain]
Award Type
Award Type [Axis]
Carrying amount of debt
Long-Term Debt
Legal Entity [Axis]
Legal Entity [Axis]
TOTAL ASSETS
Consolidated Assets
Assets
Trading Symbol
Trading Symbol
2029
Lessee, Operating Lease, Liability, to be Paid, Year Four
TOTAL COMMON EQUITY
Partners' Capital
Entity Address, City or Town
Entity Address, City or Town
Short-Term Debt, Type [Domain]
Short-Term Debt, Type [Domain]
CASH FLOWS FROM OPERATING ACTIVITIES:
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
TOTAL
Public Utilities, Property, Plant and Equipment, Plant in Service
Non-PEO NEO Average Compensation Actually Paid Amount
Non-PEO NEO Average Compensation Actually Paid Amount
Net Short-term Bank Borrowings
Proceeds from (Repayments of) Short-Term Debt
Commercial
Commercial Customers [Member]
Commercial Customers
Consolidated Other Operations and Maintenance Expenses
Utilities Operating Expense, Maintenance And Operations, Other
Utilities Operating Expense, Maintenance And Operations, Other
Compensation Actually Paid vs. Other Measure
Compensation Actually Paid vs. Other Measure [Text Block]
Regulatory Agency [Axis]
Regulatory Agency [Axis]
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Employee Benefit Plans
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member]
Short-term Borrowings
Short-Term Debt [Text Block]
Insider Trading Policies and Procedures Not Adopted
Insider Trading Policies and Procedures Not Adopted [Text Block]
CoBank, ACB
CoBank, ACB Committed Line Of Credit [Member]
CoBank, ACB Committed Line Of Credit
Amortizing Secured Notes And State Revolving Trust Notes
Amortizing Secured Notes And State Revolving Trust Notes [Member]
Amortizing Secured Notes And State Revolving Trust Notes
Balance at beginning of period (in shares)
Balance at end of period (in shares)
Common Stock, Shares, Outstanding
NJBPU
New Jersey Board Of Public Utilities [Member]
New Jersey Board Of Public Utilities
PEO
PEO [Member]
Schedule of Operating Revenues
Disaggregation of Revenue [Table Text Block]
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITY:
Noncash Investing and Financing Items [Abstract]
Accrued Taxes
Accrued Income Taxes, Current
Changes in Assets and Liabilities:
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member]
Other Non-Regulated Revenues
Unregulated Operating Revenue, Other
Represent the amount of other non regulated revenues.
Interest Charges:
Interest Expense, Nonoperating [Abstract]
Retained Earnings
Retained Earnings [Member]
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Restatement Determination Date
Restatement Determination Date
$7.00 Series Preferred Dividend (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF PERIOD
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation
Income Statement [Abstract]
Income Statement [Abstract]
Income Taxes
Consolidated Income Taxes
Income Tax Expense (Benefit)
Sale of Stock [Domain]
Sale of Stock [Domain]
TOTAL OTHER ASSETS
Other Assets
Pinewood Acres Water Utility Assets
Pinewood Acres Water Utility Assets [Member]
Pinewood Acres Water Utility Assets
Preferred stock, issued (in shares)
Preferred Stock, Shares Issued
Pension Adjustments Service Cost
Pension Adjustments Service Cost [Member]
Regulated
Regulated Segment [Member]
Regulated [Member]
Product and Service [Domain]
Product and Service [Domain]
Average purchase of gallons annually under agreement (in gallons)
Purchase Obligation, Volume Per Year
Purchase Obligation, Volume Per Year
Restatement does not require Recovery
Restatement Does Not Require Recovery [Text Block]
City Of Dover Treated Water Contract
City Of Dover Treated Water Contract [Member]
City Of Dover Treated Water Contract
Equity Portion of Allowance for Funds Used During Construction (AFUDC)
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity
Compensation Actually Paid vs. Company Selected Measure
Compensation Actually Paid vs. Company Selected Measure [Text Block]
Employee Benefit Plans - Schedule of Employee Retirement Benefit Plans (Details) [Table]
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]
City Area Code
City Area Code
Award Timing, How MNPI Considered
Award Timing, How MNPI Considered [Text Block]
All Trading Arrangements
All Trading Arrangements [Member]
Equity Awards Adjustments, Footnote
Equity Awards Adjustments, Footnote [Text Block]
Total Shareholder Return Vs Peer Group
Total Shareholder Return Vs Peer Group [Text Block]
Accrued Interest
Accrued Liabilities, Current
Preferred Stock Dividend Requirements
Preferred Dividend
Preferred Stock Dividends, Income Statement Impact
Requested increase in annual base revenues
Public Utilities, Requested Rate Increase (Decrease), Amount
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Conversion of Preferred Stock into Common Stock
Conversion of Stock, Amount Converted
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Pay vs Performance Disclosure
Pay vs Performance Disclosure [Table]
NET CASH PROVIDED BY OPERATING ACTIVITIES
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Effective Income Tax Rate Reconciliation [Table]
Effective Income Tax Rate Reconciliation [Table]
Amortization of Unrecognized Losses (Gains)
Defined Benefit Plan, Amortization of Gain (Loss)
Subsequent Event
Subsequent Event [Member]
Effective Income Tax Rate Reconciliation [Line Items]
Effective Income Tax Rate Reconciliation [Line Items]
TOTAL OTHER LIABILITIES
Other Liabilities
Equity Valuation Assumption Difference, Footnote
Equity Valuation Assumption Difference, Footnote [Text Block]
Approved increase percentage in rates
Public Utilities, Approved Rate Increase (Decrease), Percentage
Schedule of Operating Lease ROU Assets and Lease Liabilities
Lease, Cost [Table Text Block]
PEO Total Compensation Amount
PEO Total Compensation Amount
Purchase Commitment, Excluding Long-Term Commitment [Axis]
Purchase Commitment, Excluding Long-Term Commitment [Axis]
Long-Term Debt, Type [Axis]
Long-Term Debt, Type [Axis]
Depreciation
Consolidated Depreciation
Depreciation
Number of customers served
Asset Acquisition, Number Of Customers
Asset Acquisition, Number Of Customers
Equity Components [Axis]
Equity Components [Axis]
Restricted Stock Award - Board of Directors
Stock Issued During Period, Value, Restricted Stock Award, Gross
Non-Rule 10b5-1 Arrangement Adopted
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Number of reportable segment
Number of Reportable Segments
Construction Work in Progress
Public Utilities, Property, Plant and Equipment, Construction Work in Progress
Refund of excess deferred income taxes
Deferred Income Taxes, Required Refund Amount
Deferred Income Taxes, Required Refund Amount
Ocean View
Town of Ocean View, Delaware Water Utility Assets [Member]
Town of Ocean View, Delaware Water Utility Assets
Other Performance Measure, Amount
Other Performance Measure, Amount
Deferred Debt Issuance Expense
Payments of Debt Issuance Costs
Regulatory Liabilities
Regulatory Liability, Noncurrent
Entity Address, State or Province
Entity Address, State or Province
May 2024 Delaware SRF
May 2024 Delaware State Revolving Fund [Member]
May 2024 Delaware State Revolving Fund
TOTAL CURRENT LIABILITIES
Liabilities, Current
Common Shares Outstanding :
Assets, Average Outstanding [Abstract]
Restricted Stock Award - Board of Directors (in shares)
Stock Issued During Period, Shares, Restricted Stock Award, Gross
Individual:
Individual [Axis]
Authorized return on common equity rate
Public Utilities, Approved Return on Equity, Percentage
Payment of Common Dividends
Payments of Ordinary Dividends, Common Stock
Entity [Domain]
Entity [Domain]
NET CASH USED IN INVESTING ACTIVITIES
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation
5.99% FMBs due 2055
5.99% First Mortgage Bonds Due 2055 [Member]
5.99% First Mortgage Bonds Due 2055
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member]
Interest
Interest Paid, Excluding Capitalized Interest, Operating Activity
DSIC
Distribution System Improvement Charge [Member]
Distribution System Improvement Charge Foundational Filing
Document Fiscal Year Focus
Document Fiscal Year Focus
Operating Lease Right of Use Asset
ROU Asset
Operating Lease, Right-of-Use Asset
Forgone Recovery, Explanation of Impracticability
Forgone Recovery, Explanation of Impracticability [Text Block]
Redemption of Long-term Debt
Repayments of Long-Term Debt
Effective tax rate percentage
Effective Income Tax Rate Reconciliation, Percent
Entity Interactive Data Current
Entity Interactive Data Current
Expenditures for operating leases
Operating Lease, Cost
Wholesale
Wholesale Customers [Member]
Wholesale Customers
Carrying Amount
Reported Value Measurement [Member]
Equity [Abstract]
Estimated future expenditure obligation
Purchase Obligation
Business Segment Data
Segment Reporting Disclosure [Text Block]
Proceeds from Litigation Settlement, Net
Proceeds From Litigation Settlement, Net
Proceeds From Litigation Settlement, Net
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
DEPSC
Delaware Public Service Commission [Member]
Delaware Public Service Commission
Other Commitments [Line Items]
Other Commitments [Line Items]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Approved increase amount in revenues
Public Utilities, Approved Rate Increase (Decrease), Amount
Accrued Payables for Utility Plant
Accrued Payables For Utility Plant
The amount of accrued payables for utility plant.
Schedule of Employee Retirement Benefit Plans
Schedule of Net Benefit Costs [Table Text Block]
Compensation Actually Paid vs. Total Shareholder Return
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
Nonredeemable Preferred Stock $4.75 Series
Nonredeemable Preferred Stock, $4.75 Series [Member]
Nonredeemable Preferred Stock, $4.75 Series
Other
Other Assets, Noncurrent
Customer [Domain]
Customer [Domain]
Central Index Key
Entity Central Index Key
Recovering costs
Recovery of Direct Costs
PEO Name
PEO Name
Operating Revenues
Total Revenue
Revenues
Aggregate gross sales price
Sale of Stock, Consideration Received on Transaction
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Outstanding Aggregate Erroneous Compensation Amount
Outstanding Aggregate Erroneous Compensation Amount
Average Number of
Average Number Of [Abstract]
Average Number Of
Arrangement Duration
Trading Arrangement Duration
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Unearned Revenues and Advanced Service Fees
Contract with Customer, Liability, Current
Materials and Supplies (at average cost)
Inventory, Raw Materials and Supplies, Gross
General
Public Utilities, Property, Plant and Equipment, Common
Segments [Axis]
Segments [Axis]
Exercise Price
Award Exercise Price
Entity Filer Category
Entity Filer Category
Class of Stock [Domain]
Class of Stock [Domain]
Local Phone Number
Local Phone Number
CAPITALIZATION:
Capitalization, Long-Term Debt and Equity [Abstract]
Additional 402(v) Disclosure
Additional 402(v) Disclosure [Text Block]
Statutory federal tax rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Consolidated Purchased Water
Total Costs
Cost of Purchased Water
ASSETS
Assets [Abstract]
Long-term Debt
TOTAL LONG-TERM DEBT
Long-Term Debt, Excluding Current Maturities
Underlying Security Market Price Change
Underlying Security Market Price Change, Percent
Tidewater
Tidewater [Member]
Tidewater [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Employee Benefit Plans
Retirement Benefits [Text Block]
Advances for Construction
Construction Payable
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member]
Basis of Presentation and Recent Developments - Schedule of Recently Issued Accounting Standards (Details) [Table]
Basis of Presentation and Recent Developments - Schedule of Recently Issued Accounting Standards (Details) [Table]
Basis of Presentation and Recent Developments - Schedule of Recently Issued Accounting Standards (Details) [Table]
Acquisition of Water Systems
Payments to Acquire Water Systems
Entity Address, Address Line One
Entity Address, Address Line One
Allowance for Funds Used During Construction
Public Utilities, Allowance for Funds Used During Construction, Additions
Interest rate
Debt Instrument, Interest Rate, Stated Percentage
Allowance for credit losses
Accounts Receivable, Allowance for Credit Loss, Current
Lease Obligations
Non-Current Lease Liability
Operating Lease, Liability, Noncurrent
Conversion of $7 Preferred Stock to Common Stock (in shares)
Stock Issued During Period, Shares, Conversion of Convertible Securities
PWAC
Purchased Water Adjustment Clause [Member]
Purchased Water Adjustment Clause
Maximum percentage of costs to be recovered
Requested Recovery Of Costs, Maximum, Percentage
Requested Recovery Of Costs, Maximum, Percentage
Fair Value as of Grant Date
Award Grant Date Fair Value
Registrant Name
Entity Registrant Name
Non – Regulated
Non-Regulated Segment [Member]
Non - Regulated [Member]
Stock Price or TSR Estimation Method
Stock Price or TSR Estimation Method [Text Block]
Net Periodic Benefit
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Other Taxes
Consolidated Other Taxes
Taxes, Other
Accumulated Amortization
Operating Lease, Right-Of-Use Asset, Accumulated Amortization
Represents the amount of operating lease accumulated amortization.
Depreciation:
Depreciation [Abstract]
Regulated Operations [Abstract]
Regulated Operations [Abstract]
Maximum petitioned borrowing amount approved
Debt Instrument, Maximum Face Amount Approved To Borrow
Debt Instrument, Maximum Face Amount Approved To Borrow
Cash Paid During the Period for:
Cash Paid During Period [Abstract]
Cash Paid During Period
Document Quarterly Report
Document Quarterly Report
State Revolving Trust Notes
State Revolving Trust Notes [Member]
State Revolving Trust Notes [Member]
Provision for Deferred Income Taxes and Investment Tax Credits
Deferred Income Taxes and Tax Credits
FMBs
Long-Term Debt, Fair Value
Changed Peer Group, Footnote
Changed Peer Group, Footnote [Text Block]
2027
Lessee, Operating Lease, Liability, to be Paid, Year Two
Adjustment To PEO Compensation, Footnote
Adjustment To PEO Compensation, Footnote [Text Block]
Interest Cost
Defined Benefit Plan, Interest Cost
Title
Trading Arrangement, Individual Title
Peer Group Total Shareholder Return Amount
Peer Group Total Shareholder Return Amount
Restatement Determination Date:
Restatement Determination Date [Axis]
Other Operations and Maintenance Expenses:
Utilities Operating Expense, Maintenance and Operations [Abstract]
Requested increase in annual base revenues percentage
Public Utilities, Requested Rate Increase (Decrease), Percentage
Non-PEO NEO
Non-PEO NEO [Member]
Income Taxes:
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Construction Advances and Contributions-Net
Proceeds from (Payment for) Other Financing Activity
Sale of Stock [Axis]
Sale of Stock [Axis]
Tidewater
Tidewater Utilities, Inc. [Member]
Tidewater Utilities, Inc.
Name
Trading Arrangement, Individual Name
All Award Types
Award Type [Domain]
2026
Lessee, Operating Lease, Liability, to be Paid, Year One
Short-Term Debt [Table]
Short-Term Debt [Table]
Other Taxes:
Taxes, Miscellaneous [Abstract]
Equity Awards Adjustments
Equity Awards Adjustments [Member]
ROU Asset at Lease Inception
Operating Lease, Right-Of-Use Asset, Before Accumulated Amortization
Right of use asset at lease inception.
Pension Benefits Adjustments, Footnote
Pension Benefits Adjustments, Footnote [Text Block]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Compensation Amount
Outstanding Recovery Compensation Amount
Borrowing amount
Debt Instrument, Face Amount
Construction Advances
Construction Advances [Member]
Construction Advances
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Recovery of Erroneously Awarded Compensation Disclosure [Line Items]
Fair Value
Estimate of Fair Value Measurement [Member]
Underwritten Public Offering and/or ATM Offering
Over-Allotment Option And/Or At-The-Market Offering [Member]
Over-Allotment Option And/Or At-The-Market Offering
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
Treated
Cost of Purchased Water, Treated
Refers to cost of treated water during the period.
MNPI Disclosure Timed for Compensation Value
MNPI Disclosure Timed for Compensation Value [Flag]
Name
Awards Close in Time to MNPI Disclosures, Individual Name
Construction Agreement
Construction Agreement [Member]
Construction Agreement
Restricted Cash
Restricted Cash, Noncurrent
Estimated incremental borrowing rate
Operating Lease, Estimated Interest Rate, Percent
Estimated incremental borrowing rate.
Aggregate Erroneous Compensation Not Yet Determined
Aggregate Erroneous Compensation Not Yet Determined [Text Block]
Regulatory Assets
Regulatory Asset, Noncurrent
Revenues:
Revenues [Abstract]
RESIC
Resiliency And Environmental System Improvement Charge [Member]
Resiliency And Environmental System Improvement Charge Foundational Filing
Conversion of $7 Preferred Stock to Common Stock
Stock Issued During Period, Value, Conversion of Convertible Securities
Litigation Case [Axis]
Litigation Case [Axis]
Number of active construction projects funded by debt instruments
Number Of Projects Funded By Debt Instruments
Number Of Projects Funded By Debt Instruments
Segments [Domain]
Segments [Domain]
Available
Line of Credit Facility, Remaining Borrowing Capacity
Aggregate Pension Adjustments Service Cost
Aggregate Pension Adjustments Service Cost [Member]
Schedule of Recently Issued Accounting Standards
Accounting Standards Update and Change in Accounting Principle [Table Text Block]
Minimum
Minimum
Minimum [Member]
OTHER ASSETS:
Assets, Noncurrent [Abstract]
Period for requested recovery of costs
Requested Recovery Of Costs, Period
Requested Recovery Of Direct Costs, Period
Company Selected Measure Name
Company Selected Measure Name
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Operating Income:
Operating Income (Loss) [Abstract]
Preferred Stock, No Par Value; authorized 120; issued 13
TOTAL PREFERRED STOCK
Preferred Stock, Value, Issued
Aggregate Available
Trading Arrangement, Securities Aggregate Available Amount
Purchase Commitment, Excluding Long-Term Commitment [Domain]
Purchase Commitment, Excluding Long-Term Commitment [Domain]
Accounts Payable
Accounts Payable, Current
Aggregate gross sales price of shares remaining to be issued under agreement
Sale Of Stock, Remaining Consideration Receivable On Transaction
Sale Of Stock, Remaining Consideration Receivable On Transaction
NJBPU Treated Water Agreement
New Jersey Board Of Public Utilities Treated Water Agreement [Member]
New Jersey Board Of Public Utilities Treated Water Agreement
Stock Appreciation Rights (SARs)
Stock Appreciation Rights (SARs) [Member]
Water Production
Public Utilities, Property, Plant and Equipment, Generation or Processing
Earnings Applicable to Common Stock, Diluted
Earnings Applicable to Common Stock
Net Income (Loss) Available to Common Stockholders, Diluted
All Executive Categories
All Executive Categories [Member]
Common Stock, No Par Value, authorized 40,000, issued 18,338 and 17,887 in 2025 and 2024, respectively
Common Stock, No Par Value
Common Stock, Value, Issued
Commitments and Contingent Liabilities
Commitments and Contingencies Disclosure [Text Block]
Regulated Operation, Regulatory Asset [Table]
Regulated Operation, Regulatory Asset [Table]
Diluted (in shares)
Adjusted Earnings Applicable to Common Stock, Diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Weighted average interest rate
Short-Term Debt, Weighted Average Interest Rate, at Point in Time
COMMITMENTS AND CONTINGENT LIABILITIES (Note 7)
Commitments and Contingencies
Non-GAAP Measure Description
Non-GAAP Measure Description [Text Block]
Loans Payable
Loans Payable [Member]
Entity Small Business
Entity Small Business
ATM Equity Sales Agreement
At-The-Market Equity Offering [Member]
At-The-Market Equity Offering
Common Stock Issuance Expense
Payments of Stock Issuance Costs
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
Cumulative preferred stock, price (in dollars per share)
Convertible preferred stock, conversion price (in dollars per share)
Preferred Stock, Convertible, Conversion Price
Document Transition Report
Document Transition Report
Requested purchase of assets
Asset Acquisition, Requested Consideration
Asset Acquisition, Requested Consideration
Underlying Securities
Award Underlying Securities Amount
Short-Term Debt [Line Items]
Short-Term Debt [Line Items]
Equity Component [Domain]
Equity Component [Domain]
Statement of Partners' Capital [Abstract]
Statement of Partners' Capital [Abstract]
Document Period End Date
Document Period End Date
PEO Actually Paid Compensation Amount
PEO Actually Paid Compensation Amount
Average purchase of gallons a day under agreement (in mgd)
Purchase Obligation, Volume Per Day
The average purchase of gallons.
Income Taxes
Income Tax Disclosure [Text Block]
Diluted:
Earnings Per Share, Diluted [Abstract]
Add: Premium on Issuance of Long-term Debt
Debt Instrument, Unamortized Premium
Amount spent to identify and inventory lead service lines
Payment For Requested Recovery Of Costs
Cost Related To Requested Returns
Awards Close in Time to MNPI Disclosures, Table
Awards Close in Time to MNPI Disclosures [Table Text Block]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Abstract]
Scenario [Axis]
Scenario [Axis]
Document Type
Document Type
Earnings Per Share
Earnings Per Share [Text Block]
Name
Outstanding Recovery, Individual Name
Product and Service [Axis]
Product and Service [Axis]
Asset Acquisition [Domain]
Asset Acquisition [Domain]
Proceeds from Issuance of Common Stock
Total net proceeds from shares issued and sold under agreement
Proceeds from Issuance of Common Stock
Total Revenue from Contracts with Customers
Revenue from Contract with Customer, Excluding Assessed Tax
All Individuals
All Individuals [Member]
Long-Term Debt, Type [Domain]
Long-Term Debt, Type [Domain]
Less Accumulated Depreciation
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation
Acquisition of assets
Asset Acquisition, Consideration Transferred
Name
Forgone Recovery, Individual Name
PFAS Damages MDL Lawsuit
Multi-District Litigation Lawsuit, Perfluoroalkyl Substance Damages [Member]
Multi-District Litigation Lawsuit, Perfluoroalkyl Substance Damages
TOTAL CURRENT ASSETS
Assets, Current
Regulatory Agency [Domain]
Regulatory Agency [Domain]
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Interest Capitalized
AFUDC-Debt utility plant expenditures
Interest Paid, Capitalized, Investing Activity
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member]
Amortizing Secured Notes
Amortizing Secured Notes [Member]
Amortizing Secured Notes
$7.00 Series Preferred Dividend
Convertible Preferred Dividends, Net of Tax
Aggregate Erroneous Compensation Amount
Aggregate Erroneous Compensation Amount
2023 Delaware SRF
2023 Delaware State Revolving Fund [Member]
2023 Delaware State Revolving Fund
Payment of Grantee Withholding Taxes in Exchange for Restricted Stock
Payment, Tax Withholding, Share-Based Payment Arrangement
Cumulative Preferred Stock, No Par Value:
Features of Convertible Preferred Stock [Abstract]
Peer Group Issuers, Footnote
Peer Group Issuers, Footnote [Text Block]
Earnings Applicable to Common Stock, Basic
Net Income (Loss) Available to Common Stockholders, Basic
Erroneous Compensation Analysis
Erroneous Compensation Analysis [Text Block]
CURRENT LIABILITIES:
Liabilities, Current [Abstract]
Line of Credit Facility [Line Items]
Line of Credit Facility [Line Items]
Bank of America
Bank Of America Uncommitted Line Of Credit [Member]
Bank of America [Member]
Other Assets and Liabilities
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Total Operating Expenses
Operating Expenses
Rule 10b5-1 Arrangement Terminated
Rule 10b5-1 Arrangement Terminated [Flag]
Regulated Tariff Sales
Regulated Tariff-Based Services [Member]
Regulated Tariff-Based Water And Wastewater Utility Services
Accrued Interest
Increase (Decrease) in Accrued Liabilities
Diluted (in dollars per share)
Diluted EPS (in dollars per share)
Earnings Per Share, Diluted
Forecast
Forecast [Member]
Erroneously Awarded Compensation Recovery
Erroneously Awarded Compensation Recovery [Table]
Accounts Receivable, net of allowance for uncollectible accounts of $2,055and $2,326, respectively
Accounts Receivable, after Allowance for Credit Loss, Current
Title of 12(b) Security
Title of 12(b) Security
Expected cash contributions over remainder of the current year
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year
SUPPLEMENTAL DISCLOSURE OF CASH FLOWS INFORMATION:
Income Taxes Paid, Net [Abstract]
Cash Dividends on Preferred Stock
Dividends, Preferred Stock, Cash
Number of shares issued and sold under agreement (in shares)
Sale of Stock, Number of Shares Issued in Transaction
Middlesex Water Company Investment Plan
Stock Issued During Period, Value, Dividend Reinvestment Plan
Earnings per share of Common Stock:
Earnings Per Share [Abstract]
Consolidation Items [Domain]
Consolidation Items [Domain]
Total Other Income, net
Consolidated Other Income, Net
Nonoperating Income (Expense)
Prepayments
Increase (Decrease) in Prepaid Expense
Maximum value of costs to be recovered
Requested Recovery Of Costs, Maximum, Amount
Requested Recovery Of Costs, Maximum, Amount
Short-Term Debt, Type [Axis]
Short-Term Debt, Type [Axis]
UTILITY PLANT:
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Imputed Interest
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Adjusted Earnings Applicable to Common Stock, Diluted
Net Income (Loss) Available to Common Stockholders, Diluted, Adjusted
Represents the amount of adjusted earnings applicable to common stock.
PNC Bank
PNC Bank Committed Line Of Credit [Member]
PNC Bank [Member]
Income Taxes
Income Taxes Paid, Net
Increase (decrease) in income taxes
Increase (Decrease) In Income Tax Expense (Benefit)
Increase (Decrease) In Income Tax Expense (Benefit)
September 2024 Delaware SRF
September 2024 Delaware State Revolving Fund [Member]
Delaware State Revolving Fund
Award Timing Disclosures [Line Items]
Service Cost
Defined Benefit Plan, Service Cost
SUBTOTAL LONG-TERM DEBT
Long-Term Debt, Gross
Fire Protection
Fire Protection Customers [Member]
Fire-Protection Customers
Total Lease Payments
Lessee, Operating Lease, Liability, to be Paid
Industrial
Industrial Customers [Member]
Industrial Customers
Capitalization
Equity [Text Block]
Schedule of Carrying Amount and Fair Value of First Mortgage Bonds (FMBs)
Schedule of Capitalization [Table Text Block]
New Jersey SRF
New Jersey State Revolving Fund [Member]
New Jersey State Revolving Fund
Net Income
Net Income
Consolidated Net Income
Net Income (Loss) Attributable to Parent
Inter-segment Elimination
Intersegment Eliminations [Member]
Expiration Date
Trading Arrangement Expiration Date
OTHER LIABILITIES:
Liabilities, Noncurrent [Abstract]
UTILITY PLANT - NET
Public Utilities, Property, Plant and Equipment, Net
NJWSA Untreated Water Agreement
New Jersey Water Supply Authority Untreated Water Agreement [Member]
New Jersey Water Supply Authority Agreement
Schedule of Purchased Water Costs
Purchase Commitment, Excluding Long-Term Commitment [Table Text Block]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Preferred stock, authorized (in shares)
Preferred Stock, Shares Authorized
Net Income:
Net Income (Loss) Attributable to Parent [Abstract]
Adoption Date
Trading Arrangement Adoption Date
Compensation Actually Paid vs. Net Income
Compensation Actually Paid vs. Net Income [Text Block]
Accounts Receivable
Increase (Decrease) in Accounts Receivable
Residential
Residential Customers [Member]
Residential Customers
Entity Current Reporting Status
Entity Current Reporting Status
Customer [Axis]
Customer [Axis]
Awards Close in Time to MNPI Disclosures
Awards Close in Time to MNPI Disclosures [Table]
Operating Income
Consolidated Operating Income
Operating Income (Loss)
Line of Credit
Line of Credit [Member]
Retained Earnings
Retained Earnings (Accumulated Deficit)
Refund of interest on excess deferred income taxes
Interest On Deferred Income Taxes, Required Refund Amount
Interest On Deferred Income Taxes, Required Refund Amount
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested
Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member]
Executive Category:
Executive Category [Axis]
State corporate net income tax rates
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent
Average Daily Amounts Outstanding
Line of Credit Facility, Average Outstanding Amount
Cash Surrender Value of Life Insurance
Life Insurance, Corporate or Bank Owned, Change in Value
Class of Stock [Axis]
Class of Stock [Axis]
Proceeds from Issuance of Long-term Debt
Debt drawn down
Proceeds from Issuance of Long-Term Debt
Current Fiscal Year End Date
Current Fiscal Year End Date
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member]
Company cash contributions to Other Benefits Plan
Payment for Other Postretirement Benefits
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Convertible Preferred Stock $7.00 Series
Convertible Preferred Stock [Member]
Statement [Table]
Statement [Table]
Other Income (Expense), net
Other Nonoperating Income (Expense)
Adjustments to Reconcile Net Income to
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]
Size of elevated storage tank (in gallons)
Projects Funded By Debt Instruments, Storage Volume Of Project
Projects Funded By Debt Instruments, Storage Volume Of Project
CASH FLOWS FROM FINANCING ACTIVITIES:
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Equity Awards Adjustments, Excluding Value Reported in Compensation Table
Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]
Non-Regulated Contract Operations
Unregulated Service Contracts [Member]
Non-Regulated Operation And Maintenance Contracts For Services On Water And Wastewater Systems Owned By Others
Litigation Settlement Receivable
Litigation Settlement Receivable
Litigation Settlement Receivable
Number of debt instruments
Number Of Debt Instruments
Number Of Debt Instruments
All Adjustments to Compensation
All Adjustments to Compensation [Member]
Fair Value, by Balance Sheet Grouping [Table]
Fair Value, by Balance Sheet Grouping [Table]
Amendment Flag
Amendment Flag
Litigation Settlement Payable
Litigation Settlements Payable
Litigation Settlements Payable
Other Benefits
Other Postretirement Benefits Plan [Member]
Common Stock Issuance Expense
Stock Issued During Period, Issuance Costs
Stock Issued During Period, Issuance Costs
Other Commitments [Table]
Other Commitments [Table]
Termination Date
Trading Arrangement Termination Date
NET CASH PROVIDED BY FINANCING ACTIVITIES
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation
Unbilled Revenues
Increase (Decrease) in Contract with Customer, Asset
Insider Trading Policies and Procedures Adopted
Insider Trading Policies and Procedures Adopted [Flag]
Measure:
Measure [Axis]
Basis of Presentation and Recent Developments
Basis of Presentation and Significant Accounting Policies [Text Block]
Restricted Stock Award - Net - Employees
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures
Basic (in shares)
Earnings Applicable to Common Stock, Basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Schedule of Earnings Per Share
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Pay vs Performance Disclosure, Table
Pay vs Performance [Table Text Block]
Number of entities seeking permissions for a corporate reorganization
Public Utilities, Requested Corporate Reorganization, Number Of Entities
Corporate Reorganization, Number Of Entities
Forgone Recovery due to Violation of Home Country Law, Amount
Forgone Recovery due to Violation of Home Country Law, Amount
Other Income (Expense):
Other Income:
Nonoperating Income (Expense) [Abstract]
Entity Tax Identification Number
Entity Tax Identification Number
Scenario [Domain]
Scenario [Domain]
First Mortgage Bonds
FMBs
First Mortgage Bonds [Member]
First Mortgage Bonds [Member]
Asset Acquisition [Axis]
Asset Acquisition [Axis]
Other Regulated Revenues
Regulated Operating Revenue, Other
Capital Expenditures:
Segment Reporting Information, Additional Information [Abstract]
Less: Unamortized Debt Expense
Debt Instrument, Unamortized Discount
Forgone Recovery due to Expense of Enforcement, Amount
Forgone Recovery due to Expense of Enforcement, Amount
Authorized common equity ratio
Public Utilities, Approved Equity Capital Structure, Percentage
Common stock, issued (in shares)
Common Stock, Shares, Issued
Public Utilities, Regulatory Proceeding [Axis]
Public Utilities, Regulatory Proceeding [Axis]
Interest Charges
Consolidated Interest Charges
Interest Expense, Nonoperating
Trading Arrangement:
Trading Arrangement [Axis]
Total Shareholder Return Amount
Total Shareholder Return Amount
Insider Trading Arrangements [Line Items]
Security Exchange Name
Security Exchange Name
Period for surcharge filings
Surcharge Filing For Qualifying Recovery Costs, Period
Surcharge Filing For Qualifying Recovery Costs, Period
Current Portion of Long-term Debt
Other Long-Term Debt, Current
Utility Plant received as Construction Advances and Contributions
Contribution of Property
Aggregate lines of credit
Maximum
Line of Credit Facility, Maximum Borrowing Capacity
Middlesex Water Company Investment Plan (in shares)
Stock Issued During Period, Shares, Dividend Reinvestment Plan
CONTRIBUTIONS IN AID OF CONSTRUCTION
Contributions in Aid of Construction
Pension Adjustments Prior Service Cost
Pension Adjustments Prior Service Cost [Member]
Prepayments
Prepaid Expense, Current
Operating Expenses:
Operating Expenses [Abstract]
Material Terms of Trading Arrangement
Material Terms of Trading Arrangement [Text Block]
Other
Other Liabilities, Current
Operations and Maintenance
Utilities Operating Expense, Maintenance and Operations
At-The-Market Program Common Stock Issuance
Value of common shares issued
Stock Issued During Period, Value, New Issues
Statement [Line Items]
Statement [Line Items]
Consolidation Items [Axis]
Consolidation Items [Axis]
Rule 10b5-1 Arrangement Adopted
Rule 10b5-1 Arrangement Adopted [Flag]
Cash and Cash Equivalents
Cash and Cash Equivalent
Common Stock
Common Stock [Member]
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Non-NEOs
Non-NEOs [Member]
NET CHANGES IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation
Basis of Presentation and Recent Developments - Schedule of Recently Issued Accounting Standards (Details) [Line Items]
Basis of Presentation and Recent Developments - Schedule of Recently Issued Accounting Standards (Details) [Line Items]
Basis of Presentation and Recent Developments - Schedule of Recently Issued Accounting Standards (Details) [Line Items]
Notes Payable
Notes Payable, Current