Total Operating Expenses Operating Income Consolidated Operating Income Total Other Income, net Consolidated Other Income, Net Income before Income Taxes Net Income Net Income Consolidated Net Income Earnings Applicable to Common Stock Earnings Applicable to Common Stock TOTAL UTILITY PLANT - NET TOTAL CURRENT ASSETS TOTAL OTHER ASSETS TOTAL ASSETS Consolidated Assets TOTAL COMMON EQUITY TOTAL CAPITALIZATION TOTAL CURRENT LIABILITIES TOTAL OTHER LIABILITIES TOTAL CAPITALIZATION AND LIABILITIES NET CASH PROVIDED BY OPERATING ACTIVITIES NET CASH USED IN INVESTING ACTIVITIES NET CASH PROVIDED BY FINANCING ACTIVITIES NET CHANGES IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF PERIOD CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD Class of Stock [Axis] Debt Instrument [Axis] Statistical Measurement [Axis] TOTAL LONG-TERM DEBT Long-term Debt Balance Balance Balance (in Shares) Balance (in Shares) Equity Components [Axis] Basis of Presentation and Recent Developments [Abstract] Rate and Regulatory Matters [Abstract] Capitalization [Abstract] Schedule of Carrying Amount and Fair Value of First Mortgage Bonds (FMBs) [Abstract] Earnings Per Share [Abstract] Earnings per share of Common Stock: Business Segment Data [Abstract] Segments [Axis] Short-Term Borrowings [Abstract] Lender Name [Axis] Schedule of Weighted Average Daily Amounts of Borrowings Outstanding and Weighted Average Interest Rates [Abstract] Commitments and Contingent Liabilities [Abstract] Schedule of Purchased Water Costs [Abstract] Purchased Water: Total Costs Additional cost of purchased water Schedule of Operating Lease ROU Assets and Lease Liabilities [Abstract] ROU Asset OTHER ASSETS: Operating Lease Right of Use Asset Schedule of Future Minimum Operating Lease Commitments [Abstract] Total Lease Payments Present Value of Lease Payments Employee Benefit Plans [Abstract] Net Periodic Benefit Retirement Plan Type [Axis] Revenue Recognition from Contracts with Customers [Abstract] Product and Service [Axis] Total Revenue Operating Revenues Consolidated Revenues Income Taxes [Abstract] Operating Expenses: Operating Expenses Other Operations and Maintenance Expenses: Operations and Maintenance Depreciation Consolidated Depreciation Other Taxes Consolidated Other Taxes Other Income (Expense): Allowance for Funds Used During Construction Other Income (Expense), net Interest Charges Consolidated Interest Charges Income Taxes Consolidated Income Taxes Preferred Stock Dividend Requirements Preferred Dividend Basic (in Dollars per share) Basic EPS (in Dollars per share) Diluted (in Dollars per share) Diluted EPS (in Dollars per share) Average Number of Common Shares Outstanding : Basic (in Shares) Earnings Applicable to Common Stock (in Shares) Diluted (in Shares) Earnings Applicable to Common Stock (in Shares) UTILITY PLANT: Water Production Transmission and Distribution General Construction Work in Progress Less Accumulated Depreciation CURRENT ASSETS: Cash and Cash Equivalents Accounts Receivable, net of allowance for credit losses of $2,101 and $2,695 in 2025 and 2024, respectively Accounts receivable, et of allowance for credit losses (in Dollars) Unbilled Revenues Materials and Supplies (at average cost) Prepayments Restricted Cash Regulatory Assets Non-utility Assets - Net Employee Benefit Plans Other CAPITALIZATION AND LIABILITIES CAPITALIZATION: Common Stock, No Par Value, authorized 40,000, issued 18,016 and 17,887 in 2025 and 2024, respectively Common Stock, No Par Value Common Stock, par value (in Dollars per share) Common Stock, authorized Common Stock, issued Retained Earnings Preferred Stock, No Par Value; authorized 120; issued 13 Preferred Stock, par value (in Dollars per share) Preferred Stock, authorized Preferred Stock, issued CURRENT Current Portion of Long-term Debt LIABILITIES: Notes Payable Accounts Payable Accrued Taxes Accrued Interest Unearned Revenues and Advanced Service Fees Other COMMITMENTS AND CONTINGENT LIABILITIES (Note 7) OTHER LIABILITIES: Advances for Construction Lease Obligations Accumulated Deferred Income Taxes Regulatory Liabilities Other CONTRIBUTIONS IN AID OF CONSTRUCTION CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by Operating Activities: Depreciation and Amortization Provision for Deferred Income Taxes and Investment Tax Credits Stock Compensation Expense Changes in Assets and Liabilities: Accounts Payable Accrued Taxes Accrued Interest Employee Benefit Plans Unearned Revenue & Advanced Service Fees CASH FLOWS FROM INVESTING ACTIVITIES: Utility Plant Expenditures, Including AFUDC-Debt of $318 in 2025 and $180 in 2024 CASH FLOWS FROM FINANCING ACTIVITIES: Proceeds from Issuance of Long-term Debt Net Short-term Bank Borrowings Proceeds from Issuance of Common Stock Construction Advances and Contributions-Net SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITY: Capital Expenditures: Utility Plant received as Construction Advances and Contributions Accrued Payables for Utility Plant Conversion of Preferred Stock into Common Stock SUPPLEMENTAL DISCLOSURE OF CASH FLOWS INFORMATION: Cash Paid During the Period for: Interest Interest Capitalized Income Taxes Cumulative Preferred Stock, No Par Value: Convertible: TOTAL PREFERRED STOCK Nonredeemable: Long-term Debt: SUBTOTAL LONG-TERM DEBT Interest rate Long term debt maturity period Add: Premium on Issuance of Long-term Debt Dividend Reinvestment & Common Stock Purchase Plan Dividend Reinvestment & Common Stock Purchase Plan (in Shares) Cash dividends, per share Restricted Stock Award - Board of Directors Restricted Stock Award - Board of Directors (in Shares) Conversion of $7 Preferred Stock to Common Stock (in Shares) Preferred Stock to Common Stock At-The-Market Program Common Stock Issuance At-The-Market Program Common Stock Issuance (in Shares) Equity Portion of Allowance for Funds Used During Construction (AFUDC) Cash Surrender Value of Life Insurance Accounts Receivable Unbilled Revenues Materials & Supplies Prepayments Recovered Costs-Environmental Litigation Settlement Other Assets and Liabilities Acquisition of Water Systems Redemption of Long-term Debt Deferred Debt Issuance Expense Payment of Grantee Withholding Taxes in Exchange for Restricted Stock Common Stock Issuance Expense Payment of Common Dividends Payment of Preferred Dividends Less: Unamortized Debt Expense Less: Current Portion of Long-term Debt Restricted Stock Award - Net - Employees Restricted Stock Award - Net - Employees (in Shares) Cash Dividends on Common Stock Cash Dividends on Preferred Stock Conversion of $7 Preferred Stock to Common Stock Common Stock Issuance Expense Issuance of common stock value Convertible Preferred Stock $7.00 Series Convertible Preferred Stock [Member] Nonredeemable Preferred Stock $7.00 Series Nonredeemable Preferred Stock $4.75 Series