Weighted average price per share (usd per share)
Sale of Stock, Weighted Average Price Per Share
Sale of Stock, Weighted Average Price Per Share
Business Acquisition [Axis]
Business Acquisition [Axis]
Schedule of Regulatory Assets [Table]
Schedule of Regulatory Assets [Table]
Rental income
Operating Lease, Lease Income
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Water Revenue Adjustment (“WRA”)
Water Revenue Adjustment [Member]
WRA [Member]
Provision for income taxes
Provision (benefit) for income taxes
Income Tax Expense (Benefit)
Geographical [Domain]
Geographical [Domain]
Regulated and Unregulated Operation [Domain]
Regulated and Unregulated Operation [Domain]
Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table]
Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table]
DEFERRED INCOME TAXES
Deferred Income Tax Liabilities, Net
Income Statement [Abstract]
Income Statement [Abstract]
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Additional Paid-in Capital
Additional Paid-in Capital [Member]
4.85% Senior Note, Series P
4.85% Senior Note, Series P [Member]
4.85% Senior Note, Series P
Document Fiscal Period Focus
Document Fiscal Period Focus
Regulation Status [Axis]
Regulation Status [Axis]
Purchased water
Cost of Purchased Water
Assets held for sale
Assets Held-for-sale, Not Part of Disposal Group
Unrealized gain (loss) on investment, net of taxes
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent
Diluted (shares)
Weighted Average Number of Shares Outstanding, Diluted
Total regulatory assets, net in Condensed Consolidated Balance Sheets
Net Regulatory Assets
All Other
Other Segments [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Long-Lived Assets Held-for-sale, Name [Domain]
Long-Lived Assets Held-for-sale, Name [Domain]
Dividends paid
Payments of Ordinary Dividends, Common Stock
Net regulatory assets, less current portion
Total regulatory assets, net, less current portion
Regulatory Asset, Noncurrent
Real estate investments and nonutility properties
Subtotal
Real Estate Investment Property, at Cost
Total utility plant
Property, Plant and Equipment, Gross
Company-funded
Payments to Acquire Water Systems Using Company Funds
Payments to Acquire Water Systems Using Company Funds
Other production expenses
Utilities Operating Expense, Other
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
DIVIDENDS PER SHARE (usd per share)
Dividends per share (usd per share)
Common Stock, Dividends, Per Share, Cash Paid
Investments
Investments
Utility plant:
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Common stock, $0.001 par value; authorized 70,000,000 shares; issued and outstanding shares 31,427,124 on March 31, 2023 and 30,801,912 on December 31, 2022
Common Stock, Value, Issued
CAPITALIZATION:
Capitalization, Long-Term Debt and Equity [Abstract]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Shares issuable upon exercise of incentive plan awards (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issuable upon Exercise
Number of shares reserved for issuance under equity instrument agreements awarded that validly exist and are outstanding, including vested instruments.
Senior Notes
Senior Notes [Member]
Other changes, net
Payments for (Proceeds from) Other Investing Activities
Grant date fair value of equity instruments granted (usd per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Interest rate
Debt Instrument, Interest Rate, Stated Percentage
Number of people served from acquisition
Public Utilities, Acquisition, Number of People Served
Public Utilities, Acquisition, Number of People Served
Share-based Payment Arrangement [Abstract]
Share-Based Payment Arrangement [Abstract]
Additional paid-in capital
Additional Paid in Capital, Common Stock
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents
Total
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Commitments and Contingencies
Commitments and Contingencies Disclosure [Text Block]
CURRENT LIABILITIES:
Liabilities, Current [Abstract]
Market-based RSU
Market-based RSU [Member]
Market-based RSU [Member]
Long-term borrowings
Proceeds from Issuance of Long-Term Debt
Common stock, shares issued (shares)
Common Stock, Shares, Issued
Water Conservation Memorandum Account (“WCMA”)
Water Conservation Memorandum Account (WCMA) [Member]
Water Conservation Memorandum Account (WCMA)
NET INCOME
Net income
Net income (loss)
Net Income (Loss) Attributable to Parent
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive restricted common stock units excluded from computation of earnings per share (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Accrued payables for additions to utility plant
Capital Expenditures Incurred but Not yet Paid
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Amortization of prior service cost
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
Property taxes and other non-income taxes
Utilities Operating Expense, Taxes
Other regulatory mechanisms, net
Regulatory Mechanisms, Other, Net
Regulatory Mechanisms, Other, Net
Equity Component [Domain]
Equity Component [Domain]
Amendment Flag
Amendment Flag
NET CASH USED IN INVESTING ACTIVITIES
Net Cash Provided by (Used in) Investing Activities
Power
Utilities Operating Expense, Purchased Power
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Aggregate principal amount
Debt Instrument, Face Amount
Schedule of Regulatory Assets, Net
Schedule of Regulatory Assets [Table Text Block]
Contributions in aid of construction
Payments to Acquire Water Systems using Contributions In Aid of Construction
Payments to Acquire Water Systems using Contributions In Aid of Construction
Other comprehensive income (loss), net
Other Comprehensive Income (Loss), Net of Tax
Employee stock purchase plan
Stock Issued During Period, Value, Employee Stock Purchase Plan
COMPREHENSIVE INCOME
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Aggregate gross sales price (up to)
Sale of Stock, Aggregate Gross Sales Price
Sale of Stock, Aggregate Gross Sales Price
Target vesting percentage
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage
ESPP proceeds
Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised
Schedule of Segment Reporting Information, by Segment
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Fair Value Measurement
Fair Value Measurement, Policy [Policy Text Block]
Plan Name [Axis]
Plan Name [Axis]
Entity Current Reporting Status
Entity Current Reporting Status
Other current liabilities
Other Liabilities, Current
Tax receivable and payable, and other accrued taxes
Increase (Decrease) in Accrued Taxes Payable
Total other assets
Other Assets, Noncurrent
Fair value of plan assets
Defined Benefit Plan, Plan Assets, Amount
Payments to retire utility plant, net of salvage
Payments for (Proceeds from) Removal Costs
Cash paid during the period for:
Supplemental Cash Flow Information [Abstract]
Depreciation and amortization
Depreciation, Depletion and Amortization
ESPP
Employee Stock Purchase Plan [Member]
Employee Stock Purchase Plan [Member]
Regulated Operations [Abstract]
Regulated Operations [Abstract]
Plan Name [Domain]
Plan Name [Domain]
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Entity Address, State or Province
Entity Address, State or Province
Fair Value, Inputs, Level 1
Fair Value, Inputs, Level 1 [Member]
Employee stock purchase plan (in shares)
Stock Issued During Period, Shares, Employee Stock Purchase Plans
Accrued groundwater extraction charges, purchased water and power
Accrued groundwater extraction charges, purchased water and power
Accrued groundwater extraction charges, purchased water and power
Award Type [Axis]
Award Type [Axis]
Long-Lived Assets Held-for-sale by Asset Type [Axis]
Long-Lived Assets Held-for-sale by Asset Type [Axis]
Unrecognized actuarial loss
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)
Gain on sale of real estate investments
Gain (Loss) on Sale of Properties
Real Estate Services
Reportable Segment Two [Member]
Reportable Segment Two [Member]
NET CASH PROVIDED BY OPERATING ACTIVITIES
Net Cash Provided by (Used in) Operating Activities
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
At The Market Offering Member
At The Market Offering Member [Member]
At The Market Offering Member
Basis of Accounting
Basis of Accounting, Policy [Policy Text Block]
Other, net
Other Regulatory Assets [Member]
Other Regulatory Assets [Member]
Repayments of long-term borrowings
Repayments of Long-Term Debt
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
OPERATING EXPENSE:
Costs and Expenses [Abstract]
Pension non-service cost
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component
Title of Individual [Domain]
Title of Individual [Domain]
Net utility plant
Public Utilities, Property, Plant and Equipment, Net
Supplemental Employee Retirement Plan
Supplemental Employee Retirement Plan [Member]
Dividends paid
Dividends
KT Water Resource L. P.
KT Water Resource L. P. [Member]
KT Water Resource L. P.
Estimated employer contributions for the remainder of fiscal year
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year
Allowance for uncollectible accounts
Accounts Receivable, Allowance for Credit Loss, Current
Long-term debt, book value
Long-Term Debt
Other, net
Other Nonoperating Income (Expense)
Long-term debt, less current portion
Long-Term Debt, Excluding Current Maturities
Total operating expense
Operating expense
Utilities Operating Expense
Common stock, shares authorized (shares)
Common Stock, Shares Authorized
Number of subsidiaries
Number of Subsidiaries
Number of Subsidiaries
Postretirement benefits
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits
Geographical [Axis]
Geographical [Axis]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Maximum
Maximum [Member]
INVESTING ACTIVITIES:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Accumulated other comprehensive income
Accumulated Other Comprehensive Income (Loss), Net of Tax
POSTRETIREMENT BENEFIT PLANS
Liability, Defined Benefit Plan, Noncurrent
Common stock issuance, net of costs
Stock Issued During Period, Value, New Issues
2022 General Rate Case Interim Memorandum Account
2022 General Rate Case Interim Memorandum Account [Member]
2022 General Rate Case Interim Memorandum Account
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Fair Value Hierarchy and NAV [Domain]
CASH AND CASH EQUIVALENTS, END OF PERIOD
Cash and Cash Equivalents, at Carrying Value
San Jose Water Company
San Jose Water Company [Member]
San Jose Water Company [Member]
Total current assets
Assets, Current
Accrued groundwater extraction charges, purchased water and power
Increase (Decrease) in Accrued Groundwater Extraction Charges, Purchased Water and Power
Increase (Decrease) in Accrued Groundwater Extraction Charges, Purchased Water and Power
Income tax payable
Taxes Payable, Current
Income taxes
Income Taxes Paid, Net
Document Type
Document Type
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Entity Small Business
Entity Small Business
Bank Borrowings and Long-Term Liabilities
Long-Term Debt [Text Block]
Capitalization
Stockholders' Equity Note Disclosure [Text Block]
Schedule of Net Benefit Costs
Schedule of Net Benefit Costs [Table Text Block]
Total production expenses
Water Production Costs
Utility property installed by developers
Utility Property Installed by Developer
Utility Property Installed by Developer
Business Segments [Axis]
Segments [Axis]
Net real estate investments and nonutility properties
Real Estate Investment Property, Net
General
Significant Accounting Policies [Text Block]
Schedule of Real Estate Investments and Nonutility Properties
Schedule of Real Estate Investments [Table Text Block]
Tabular disclosure of real estate investments.
Regulatory Matters
Schedule of Regulatory Assets and Liabilities [Text Block]
Unrecognized compensation costs
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Income tax temporary differences, net
Deferred Income Tax Charge [Member]
Entity Shell Company
Entity Shell Company
Deferred income taxes
Deferred Income Tax Expense (Benefit)
WEIGHTED AVERAGE SHARES OUTSTANDING
Weighted Average Number of Shares Outstanding Basic and Diluted [Abstract]
Weighted Average Number of Shares Outstanding Basic and Diluted [Abstract]
Title of 12(b) Security
Title of 12(b) Security
Southern Comal County, Texas
Southern Comal County, Texas [Member]
Southern Comal County, Texas
Schedule of Defined Benefit Plans Disclosures [Table]
Schedule of Defined Benefit Plans Disclosures [Table]
Consolidated Entities [Axis]
Consolidated Entities [Axis]
Subsequent Event
Subsequent Event [Member]
Unrealized income (loss) on investment, tax expense (benefit)
Other Comprehensive Income (Loss), Available-for-Sale Securities, Tax, Portion Attributable to Parent
Document Period End Date
Document Period End Date
Monterey Water Revenue Adjustment Mechanism (“MWRAM”)
Monterey Water Revenue Adjustment Mechanism (MWRAM) [Member]
Monterey Water Revenue Adjustment Mechanism (MWRAM)
Repayments on line of credit
Repayments of Lines of Credit
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Business Combination and Asset Acquisition [Abstract]
Issuance of restricted and deferred stock units (in shares)
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture
Stockholders’ equity:
Stockholders' Equity, Number of Shares, Par Value and Other Disclosure [Abstract]
Total assets
Assets
Assets
Segment and Non-Tariffed Business Reporting
Segment Reporting Disclosure [Text Block]
Land
Land
Debt Disclosure [Abstract]
EARNINGS PER SHARE
Earnings Per Share [Abstract]
Texas Water
Texas Water [Member]
Texas Water
Performance Shares
Performance Shares [Member]
CAPITALIZATION AND LIABILITIES
Liabilities and Equity [Abstract]
Current portion of long-term debt
Long-Term Debt, Current Maturities
NET CASH PROVIDED BY FINANCING ACTIVITIES
Net Cash Provided by (Used in) Financing Activities
Long-term debt, fair value
Long-Term Debt, Fair Value
Accounting Policies [Abstract]
Accounting Policies [Abstract]
Postretirement pensions and other postretirement benefits
Pension and Other Postretirement Plans Costs [Member]
Interest on long-term debt and other interest expense
Interest Expense, Debt
Gain on sale of nonutility properties
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property
Net proceeds from stock offering
Sale of Stock, Consideration Received on Transaction
Accrued payroll
Employee-related Liabilities, Current
Accounts payable
Accounts Payable, Current
Less accumulated depreciation and amortization
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation
Segment [Domain]
Segments [Domain]
Interest cost
Defined Benefit Plan, Interest Cost
CTWS Employees
CTWS Employees [Member]
CTWS Employees
Total equity distribution
Sale of Stock, Total Equity Distribution Agreement Remaining
Sale of Stock, Total Equity Distribution Agreement Remaining
Regulatory Asset [Domain]
Regulatory Asset [Domain]
Schedule of Investments [Line Items]
Schedule of Investments [Line Items]
Entity Filer Category
Entity Filer Category
Issuance of common stock, net of issuance costs
Proceeds from Issuance of Common Stock
Basic (shares)
Weighted Average Number of Shares Outstanding, Basic
Award Type [Domain]
Award Type [Domain]
Recognition period for unrecognized compensation cost
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Business combinations debt premium, net
Business combinations debt premium [Member]
Business combinations debt premium
Gain on sale of nonutility property
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property, And On Sale Of Investment Real Estate
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property, And On Sale Of Investment Real Estate
Compensation costs charged to income:
Share-Based Payment Arrangement, Expense
COMMITMENTS AND CONTINGENCIES
Commitments and Contingencies
Accrued unbilled utility revenue
Receivables, Long-Term Contracts or Programs
Security Exchange Name
Security Exchange Name
Entity Registrant Name
Entity Registrant Name
Plan expense
Stock or Unit Option Plan Expense
Receipts of advances and contributions in aid of construction
Receipts Of Advances And Contributions In Aid Of Construction
Receipts Of Advances And Contributions In Aid Of Construction
Common stock issuance, net of costs (in shares)
Stock Issued During Period, Shares, New Issues
Allowance for equity funds used during construction
Public Utilities, Allowance for Funds Used During Construction, Additions
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Construction in progress
Public Utilities, Property, Plant and Equipment, Construction Work in Progress
Revenue from contracts with customers
Revenue from Contract with Customer, Excluding Assessed Tax
Entity Address, City or Town
Entity Address, City or Town
Benefit Plans
Retirement Benefits [Text Block]
Service cost
Defined Benefit Plan, Service Cost
Other balancing and memorandum accounts, net
Regulatory Balancing And Memorandum Accounts Revenue, Net
Regulatory Balancing And Memorandum Accounts Revenue, Net
Cover [Abstract]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-Term Debt Instruments [Table]
Less accumulated depreciation and amortization
Real Estate Investment Property, Accumulated Depreciation
Schedule of Compensation Costs Charged to Income and Proceeds from the Exercise of Any Restricted Stock and Similar Instruments that are Recorded to Additional Paid-In Capital and Common Stock, by Award Type
Share-Based Payment Arrangement, Cost by Plan [Table Text Block]
Minimum
Minimum [Member]
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
Entity Emerging Growth Company
Entity Emerging Growth Company
Common stock, par value (usd per share)
Common Stock, Par or Stated Value Per Share
SJW Group
Corporate Segment [Member]
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Refunds of advances for construction
Repayments Of Advances For Construction, Financing Activities
Repayments Of Advances For Construction, Financing Activities
Total capitalization and liabilities
Liabilities and Equity
Trading Symbol
Trading Symbol
Entity File Number
Entity File Number
Long-term Debt, Type [Axis]
Long-Term Debt, Type [Axis]
ADVANCES FOR CONSTRUCTION
Contract with Customer, Liability, Noncurrent
Cash
Cash
Accounts receivable and accrued unbilled utility revenue
Increase (Decrease) in Receivables
Accrued interest
Interest Payable, Current
Maintenance
Utilities Operating Expense, Maintenance
Title of Individual [Axis]
Title of Individual [Axis]
Fair Value, Inputs, Level 2
Fair Value, Inputs, Level 2 [Member]
Regulatory Assets [Line Items]
Regulatory Asset [Line Items]
LESS RESTRICTED CASH, END OF PERIOD
Restricted Cash and Cash Equivalents
Number of equity instruments granted (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period
Restricted Stock Units (RSUs)
Restricted Stock Units (RSUs) [Member]
Effective consolidated income tax rate
Effective Income Tax Rate Reconciliation, Percent
Current Fiscal Year End Date
Current Fiscal Year End Date
Borrowings on line of credit
Proceeds from Lines of Credit
Non-tariffed
Unregulated Operation [Member]
Diluted (usd per share)
Earnings Per Share, Diluted
Sale of Stock [Domain]
Sale of Stock [Domain]
Acquisitions
Business Combination Disclosure [Text Block]
OTHER (EXPENSE) INCOME:
Other Nonoperating Income (Expense) [Abstract]
Service-based restricted stock vesting period
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period
Incentive Plan
Incentive Plan [Member]
Incentive Plan [Member]
Accounts payable and other current liabilities
Increase (Decrease) in Accounts Payable
Stock-based compensation
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition
REVENUE
Total revenues
Operating revenue
Revenues
Total current liabilities
Liabilities, Current
Other current assets
Other Assets, Current
Income Taxes
Income Tax Disclosure [Text Block]
Current regulatory assets, net
Less: current regulatory assets, net
Regulatory Asset, Current
Regulated
Regulated Operation [Member]
Depreciable plant and equipment
Public Utilities, Property, Plant And Equipment, Depreciable Plant And Equipment
Public Utilities, Property, Plant And Equipment, Depreciable Plant And Equipment
Interest
Interest Paid, Excluding Capitalized Interest, Operating Activities
Basic (usd per share)
Earnings Per Share, Basic
Alternative revenue programs, net
Alternative Revenue Programs, Net
Alternative Revenue Programs, Net
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Entity Address, Address Line One
Entity Address, Address Line One
Cost recovery accounts
Cost Recovery Accounts [Member]
Cost Recovery Accounts
Other changes, net
Proceeds from (Payments for) Other Financing Activities
OTHER ASSETS:
Other Assets, Noncurrent [Abstract]
Total stockholders’ equity
Beginning balance
Ending balance
Stockholders' Equity Attributable to Parent
Prepaid expenses
Prepaid Expense, Current
Class of Stock [Domain]
Class of Stock [Domain]
Expected return on assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Warehouse Building
Warehouse Building [Member]
Warehouse Building
Interest on long-term debt and other interest expense
Interest Expense
Subsidiary, Sale of Stock [Line Items]
Subsidiary, Sale of Stock [Line Items]
Entity Interactive Data Current
Entity Interactive Data Current
Shares issued in offering (shares)
Sale of Stock, Number of Shares Issued in Transaction
Fair Value, by Balance Sheet Grouping [Table]
Fair Value, by Balance Sheet Grouping [Table]
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Equity Plans
Shareholders' Equity and Share-Based Payments [Text Block]
Changes in operating assets and liabilities:
Increase (Decrease) in Operating Capital [Abstract]
Other
Other Assets, Miscellaneous, Noncurrent
Employer plan contributions
Defined Contribution Plan, Employer Discretionary Contribution Amount
Equity [Abstract]
Retained Earnings
Retained Earnings [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Water Utility Services
Reportable Segment One [Member]
Reportable Segment One [Member]
Production Expenses:
Water Production Costs [Abstract]
Water Production Costs [Abstract]
Entity Tax Identification Number
Entity Tax Identification Number
Schedule of Investments [Table]
Schedule of Investments [Table]
Common Stock
Common Stock [Member]
CONTRIBUTIONS IN AID OF CONSTRUCTION
Contributions in Aid of Construction
Issuance of restricted and deferred stock units
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture
Remaining shares available for issuance (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant
Class of Stock [Axis]
Class of Stock [Axis]
Revenue
Revenue [Policy Text Block]
Statement [Table]
Statement [Table]
Schedule of Major Streams of Revenue
Disaggregation of Revenue [Table Text Block]
Document Quarterly Report
Document Quarterly Report
Consolidated Entities [Domain]
Consolidated Entities [Domain]
CURRENT ASSETS:
Assets, Current [Abstract]
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Other
Nontrade Receivables, Current
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
KT Water Development Ltd
KT Water Development Ltd [Member]
KT Water Development Ltd
Land
Public Utilities, Property, Plant and Equipment, Land
Retained earnings
Retained Earnings (Accumulated Deficit)
Cash and cash equivalents:
Cash, Cash Equivalents, and Short-Term Investments [Abstract]
Customers, net of allowances for uncollectible accounts of $5,851 and $5,753 on March 31, 2023 and December 31, 2022, respectively
Accounts Receivable, after Allowance for Credit Loss, Current
Entity Central Index Key
Entity Central Index Key
Equity Components [Axis]
Equity Components [Axis]
Depreciation and amortization
Depreciation and amortization
Utilities Operating Expense, Depreciation and Amortization
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Rate of compensation increase
Defined Benefit Plan, Rate of Compensation Increase
Defined Benefit Plan, Rate of Compensation Increase
Business combination, purchase price
Business Combination, Consideration Transferred
Number of service connections from acquisition
Public Utilities, Acquisition, Service Connections
Public Utilities, Acquisition, Service Connections
Document Fiscal Year Focus
Document Fiscal Year Focus
OPERATING ACTIVITIES:
Net Cash Provided by (Used in) Operating Activities [Abstract]
City Area Code
City Area Code
Statement [Line Items]
Statement [Line Items]
ASSETS
Assets [Abstract]
Administrative and general
General and Administrative Expense
Unrecognized tax benefits
Unrecognized Tax Benefits, Gross
Unrecognized Tax Benefits, Gross
Other changes, net
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Long-term Debt, Type [Domain]
Long-Term Debt, Type [Domain]
Retirement Benefits [Abstract]
Retirement Benefits [Abstract]
Buildings and improvements
Investment Building and Building Improvements
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Sale of Stock [Axis]
Sale of Stock [Axis]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Lines of credit
Line of Credit, Current
Intangible assets
Finite-Lived Intangible Assets, Gross
FINANCING ACTIVITIES:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent [Member]
Authorized revenue, threshold percentage
Regulatory Balancing and Memorandum Accounts Review, Authorized Revenue, Threshold Percentage
Threshold balance of regulatory balancing or memorandum accounts as a percentage of authorized revenue to trigger an account review.
Earnings per Share
Earnings Per Share, Policy [Policy Text Block]
Supplemental disclosure of non-cash activities:
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Stock-based compensation
Share-Based Payment Arrangement, Noncash Expense
Restricted stock and deferred restricted stock
Restricted Stock and Deferred Restricted Stock [Member]
Restricted Stock and Deferred Restricted Stock [Member]
Regulatory assets and liabilities excluding income tax temporary differences, net and postretirement benefits
Increase (Decrease) To Regulatory Asset And Liabilities Excluding Income Tax Temporary Differences, Net And Postretirement Benefits
Increase (Decrease) To Regulatory Asset And Liabilities Excluding Income Tax Temporary Differences, Net And Postretirement Benefits
Regulatory Asset [Axis]
Regulatory Asset [Axis]
OTHER NONCURRENT LIABILITIES
Other Liabilities, Noncurrent
Document Transition Report
Document Transition Report
Local Phone Number
Local Phone Number
Accounts receivable:
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Capitalization, long-term debt and equity
Capitalization, Long-Term Debt and Equity
OPERATING INCOME
Operating income (loss)
Operating Income (Loss)
All other balancing and memorandum accounts
All Other Balancing and Memorandum Accounts [Member]
All Other Balancing and Memorandum Accounts
Common stock, shares outstanding (shares)
Beginning balance (in shares)
Ending balance (in shares)
Common Stock, Shares, Outstanding
Goodwill
Goodwill
Regulatory assets, net not earning a return
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided