$CWT
CALIFORNIA WATER SERVICE GROUP Stock $cwt

$cwt Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000103520119000003 Filed on February 28, 2019

Income Statement

Concept	2017 Q4	2017 Q3	2017 Q2
Revenue	$171.2M	$197.0M	$162.6M
YoY Change	13.45%	6.89%	6.69%
Cost Of Revenue	$46.50M	$75.30M	$64.10M
YoY Change	16.54%	7.26%	11.28%
Gross Profit	$124.7M	$136.4M	$107.0M
YoY Change	12.34%	19.54%	12.87%
Gross Profit Margin	72.84%	69.24%	65.81%
Selling, General & Admin	$26.40M	$22.70M	$21.40M
YoY Change	109.52%	-4.62%	-8.55%
% of Gross Profit	21.17%	16.64%	20.0%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$19.60M	$19.70M	$19.60M
YoY Change	20.25%	21.6%	20.99%
% of Gross Profit	15.72%	14.44%	18.32%
Operating Expenses	$90.00M	$75.80M	$69.80M
YoY Change	22.95%	7.06%	0.58%
Operating Profit	$23.08M	$43.90M	$28.11M
YoY Change	8.16%	46.07%	51.67%
Interest Expense	-$8.600M	-$8.600M	-$8.500M
YoY Change	8.86%	11.69%	11.84%
% of Operating Profit	-37.27%	-19.59%	-30.24%
Other Income/Expense, Net	$400.0K	-$36.00K	$375.0K
YoY Change	-105.0%	-106.78%	-34.33%
Pretax Income	$27.20M	$52.00M	$29.40M
YoY Change	24.77%	42.47%	56.38%
Income Tax	-$99.20M	$18.19M	$10.85M
% Of Pretax Income	-364.71%	34.98%	36.91%
Net Earnings	$15.11M	$35.29M	$19.97M
YoY Change	0.12%	54.27%	73.54%
Net Earnings / Revenue	8.82%	17.91%	12.28%
Basic Earnings Per Share		$0.70	$0.39
Diluted Earnings Per Share	$0.31	$0.74	$0.42
COMMON SHARES
Basic Shares Outstanding		48.02M shares	48.02M shares
Diluted Shares Outstanding		48.02M shares	48.02M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$94.80M	$28.30M	$29.10M
YoY Change	271.76%	32.24%	-5.52%
Cash & Equivalents	$94.78M	$28.34M	$30.14M
Short-Term Investments
Other Short-Term Assets	$17.64M	$18.89M	$21.20M
YoY Change	30.17%	13.35%	7.89%
Inventory	$6.500M	$6.300M	$6.500M
Prepaid Expenses
Receivables	$32.45M	$46.96M	$39.03M
Other Receivables	$27.60M	$28.90M	$32.00M
Total Short-Term Assets	$227.9M	$180.5M	$170.6M
YoY Change	60.4%	19.43%	7.28%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.048B	$1.982B	$1.929B
YoY Change	10.15%	9.03%	8.04%
Goodwill	$2.615M	$2.615M	$2.615M
YoY Change	0.0%	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$60.78M	$58.20M	$55.35M
YoY Change	17.2%	14.22%	15.05%
Total Long-Term Assets	$2.517B	$2.423B	$2.362B
YoY Change	10.89%	8.4%	7.43%
TOTAL ASSETS
Total Short-Term Assets	$227.9M	$180.5M	$170.6M
Total Long-Term Assets	$2.517B	$2.423B	$2.362B
Total Assets	$2.745B	$2.603B	$2.533B
YoY Change	13.81%	9.1%	7.42%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$93.96M	$89.39M	$84.22M
YoY Change	20.74%	6.36%	8.53%
Accrued Expenses	$46.70M	$55.30M	$43.90M
YoY Change	5.18%	2.6%	8.4%
Deferred Revenue
YoY Change
Short-Term Debt	$275.1M	$195.1M	$190.1M
YoY Change	183.32%	241.68%	153.13%
Long-Term Debt Due	$15.92M	$36.02M	$36.11M
YoY Change	-39.26%	487.52%	488.78%
Total Short-Term Liabilities	$491.0M	$380.4M	$361.0M
YoY Change	96.2%	86.47%	78.71%
LONG-TERM LIABILITIES
Long-Term Debt	$515.8M	$519.7M	$519.9M
YoY Change	-3.0%	-6.45%	-6.46%
Other Long-Term Liabilities	$44.42M	$685.8M	$679.4M
YoY Change	-1.1%	-0.82%	-1.85%
Total Long-Term Liabilities	$560.2M	$519.7M	$519.9M
YoY Change	-2.85%	-6.45%	-6.46%
TOTAL LIABILITIES
Total Short-Term Liabilities	$491.0M	$380.4M	$361.0M
Total Long-Term Liabilities	$560.2M	$519.7M	$519.9M
Total Liabilities	$1.051B	$900.1M	$880.9M
YoY Change	27.12%	18.5%	16.24%
SHAREHOLDERS EQUITY
Retained Earnings	$362.5M	$351.7M	$326.5M
YoY Change	11.84%	10.84%	7.86%
Common Stock	$336.7M	$336.0M	$335.3M
YoY Change	0.41%	0.39%	0.38%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$699.2M	$687.7M	$661.8M
YoY Change
Total Liabilities & Shareholders Equity	$2.745B	$2.603B	$2.533B
YoY Change	13.81%	9.1%	7.42%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2017 Q2
OPERATING ACTIVITIES
Net Income	$15.11M	$35.29M	$19.97M
YoY Change	0.12%	54.27%	73.54%
Depreciation, Depletion And Amortization	$19.60M	$19.70M	$19.60M
YoY Change	20.25%	21.6%	20.99%
Cash From Operating Activities	$38.00M	$74.10M	$21.40M
YoY Change	3.83%	14.53%	-23.84%
INVESTING ACTIVITIES
Capital Expenditures	-$78.80M	-$71.70M	-$56.80M
YoY Change	26.08%	42.83%	-4.86%
Acquisitions
YoY Change
Other Investing Activities	$55.00M	-$1.600M	-$200.0K
YoY Change	6011.11%	-5.88%	-33.33%
Cash From Investing Activities	-$23.80M	-$73.30M	-$57.00M
YoY Change	-61.36%	41.23%	-5.0%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	51.50M	-1.400M	53.30M
YoY Change	76.98%	-93.72%	67.08%
NET CHANGE
Cash From Operating Activities	38.00M	74.10M	21.40M
Cash From Investing Activities	-23.80M	-73.30M	-57.00M
Cash From Financing Activities	51.50M	-1.400M	53.30M
Net Change In Cash	65.70M	-600.0K	17.70M
YoY Change	1502.44%	-93.68%	-237565378560000100.0%
FREE CASH FLOW
Cash From Operating Activities	$38.00M	$74.10M	$21.40M
Capital Expenditures	-$78.80M	-$71.70M	-$56.80M
Free Cash Flow	$116.8M	$145.8M	$78.20M
YoY Change	17.86%	26.89%	-10.93%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2017Q4	cwt	Accounts Receivable From Developers Current AccountsReceivableFromDevelopersCurrent	6425000	USD
CY2017Q4	cwt	Accounts Payable Including Regulatory Liability Current AccountsPayableIncludingRegulatoryLiabilityCurrent	93955000	USD
CY2018Q4	cwt	Accounts Payable Including Regulatory Liability Current AccountsPayableIncludingRegulatoryLiabilityCurrent	95580000	USD
CY2018Q4	cwt	Accounts Receivable From Developers Current AccountsReceivableFromDevelopersCurrent	9633000	USD
CY2017Q4	cwt	Accrued Expenses And Other Liabilities Including Accrued Interest AccruedExpensesAndOtherLiabilitiesIncludingAccruedInterest	105984000	USD
CY2018Q4	cwt	Accrued Expenses And Other Liabilities Including Accrued Interest AccruedExpensesAndOtherLiabilitiesIncludingAccruedInterest	55575000	USD
CY2017Q4	cwt	Affiliate Long Term Debt AffiliateLongTermDebt	0	USD
CY2018Q4	cwt	Affiliate Long Term Debt AffiliateLongTermDebt	0	USD
CY2016	cwt	Allowancefor Equityand Borrowed Funds Used During Construction AllowanceforEquityandBorrowedFundsUsedDuringConstruction	2965000	USD
CY2017	cwt	Allowancefor Equityand Borrowed Funds Used During Construction AllowanceforEquityandBorrowedFundsUsedDuringConstruction	6110000	USD
CY2018	cwt	Allowancefor Equityand Borrowed Funds Used During Construction AllowanceforEquityandBorrowedFundsUsedDuringConstruction	6017000	USD
CY2016	cwt	Costof Power CostofPower	27180000	USD
CY2017	cwt	Costof Power CostofPower	28862000	USD
CY2018	cwt	Costof Power CostofPower	31080000	USD
CY2018Q4	cwt	Customer Advances For Construction Refunds Due Year Five CustomerAdvancesForConstructionRefundsDueYearFive	7600000	USD
CY2018Q4	cwt	Customer Advances For Construction Refunds Due Year Four CustomerAdvancesForConstructionRefundsDueYearFour	7600000	USD
CY2018Q4	cwt	Customer Advances For Construction Refunds Due Year One CustomerAdvancesForConstructionRefundsDueYearOne	7900000	USD
CY2018Q4	cwt	Customer Advances For Construction Refunds Due Year Three CustomerAdvancesForConstructionRefundsDueYearThree	7700000	USD
CY2018Q4	cwt	Customer Advances For Construction Refunds Due Year Two CustomerAdvancesForConstructionRefundsDueYearTwo	7700000	USD
CY2018	cwt	Customer Advances For Construction Specified Refund Period CustomerAdvancesForConstructionSpecifiedRefundPeriod	P40Y
CY2017Q4	cwt	Deferred Tax Assets Developer Deposits For Extension Agreements And Contributions In Aid Of Construction DeferredTaxAssetsDeveloperDepositsForExtensionAgreementsAndContributionsInAidOfConstruction	33552000	USD
CY2018Q4	cwt	Deferred Tax Assets Developer Deposits For Extension Agreements And Contributions In Aid Of Construction DeferredTaxAssetsDeveloperDepositsForExtensionAgreementsAndContributionsInAidOfConstruction	39074000	USD
CY2018	cwt	Defined Benefit Plan Health Care Cost Trend Rate Assumed By Specified Period DefinedBenefitPlanHealthCareCostTrendRateAssumedBySpecifiedPeriod	0.055
CY2018	cwt	Defined Benefit Plan Period In Which Rate Reaches Ultimate Trend Rate DefinedBenefitPlanPeriodInWhichRateReachesUltimateTrendRate	P50Y
CY2018	cwt	Defined Contribution Plan Employer Matching Contribution On Dollar For Participant Contributions DefinedContributionPlanEmployerMatchingContributionOnDollarForParticipantContributions	0.75	USD
CY2018	cwt	Defined Contribution Plan Maximum Employer Contribution As Percentage Of Compensation DefinedContributionPlanMaximumEmployerContributionAsPercentageOfCompensation	0.06
CY2017	cwt	Deposit Assets Cash Collected Through Surcharge On Customers Bills DepositAssetsCashCollectedThroughSurchargeOnCustomersBills	500000	USD
CY2016	cwt	Effective Income Tax Rate Reconciliation Afudc Equity Amount EffectiveIncomeTaxRateReconciliationAFUDCEquityAmount	0	USD
CY2017	cwt	Effective Income Tax Rate Reconciliation Afudc Equity Amount EffectiveIncomeTaxRateReconciliationAFUDCEquityAmount	1528000	USD
CY2018	cwt	Effective Income Tax Rate Reconciliation Afudc Equity Amount EffectiveIncomeTaxRateReconciliationAFUDCEquityAmount	1106000	USD
CY2018Q4	cwt	Estimated Total Rightof Use Assetsand Total Lease Liabilities Upon Adoptionof Asu EstimatedTotalRightofUseAssetsandTotalLeaseLiabilitiesUponAdoptionofASU	13800000	USD
CY2018	cwt	Fair Value Inputs Risk Premium FairValueInputsRiskPremium	0.0170
CY2016	cwt	Increase Decrease In Other Noncurrent Assets And Liabilities Net Including Amortization Of Debt Premium And Expenses IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNetIncludingAmortizationOfDebtPremiumAndExpenses	-6906000	USD
CY2017	cwt	Increase Decrease In Other Noncurrent Assets And Liabilities Net Including Amortization Of Debt Premium And Expenses IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNetIncludingAmortizationOfDebtPremiumAndExpenses	-15965000	USD
CY2018	cwt	Increase Decrease In Other Noncurrent Assets And Liabilities Net Including Amortization Of Debt Premium And Expenses IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNetIncludingAmortizationOfDebtPremiumAndExpenses	11135000	USD
CY2016	cwt	Litigation Proceedsfor Mtbe Contamination Reclassifiedfrom Other Long Term Liabilities LitigationProceedsforMTBEContaminationReclassifiedfromOtherLongTermLiabilities	484000	USD
CY2017	cwt	Litigation Proceedsfor Mtbe Contamination Reclassifiedfrom Other Long Term Liabilities LitigationProceedsforMTBEContaminationReclassifiedfromOtherLongTermLiabilities	2420000	USD
CY2018	cwt	Litigation Proceedsfor Mtbe Contamination Reclassifiedfrom Other Long Term Liabilities LitigationProceedsforMTBEContaminationReclassifiedfromOtherLongTermLiabilities	32315000	USD
CY2018	cwt	Maximum Collection Period In Which Deferred Net Wram And Mcba Revenues And Associated Costs Will Be Recognized MaximumCollectionPeriodInWhichDeferredNetWRAMAndMCBARevenuesAndAssociatedCostsWillBeRecognized	P24M
CY2018	cwt	Minimum Collection Period After Net Receivable Balances Were Recognized In Which The Company Defers Net Wra Mand Mcba Operating Revenues And Associated Costs MinimumCollectionPeriodAfterNetReceivableBalancesWereRecognizedInWhichTheCompanyDefersNetWRAMandMCBAOperatingRevenuesAndAssociatedCosts	P12M
CY2016	cwt	Other Nonoperating Expense Income OtherNonoperatingExpenseIncome	11445000	USD
CY2017	cwt	Other Nonoperating Expense Income OtherNonoperatingExpenseIncome	9390000	USD
CY2018	cwt	Other Nonoperating Expense Income OtherNonoperatingExpenseIncome	22787000	USD
CY2017Q4	cwt	Other Nontrade Receivables Current OtherNontradeReceivablesCurrent	10039000	USD
CY2018Q4	cwt	Other Nontrade Receivables Current OtherNontradeReceivablesCurrent	7468000	USD
CY2016	cwt	Payments For Proceeds From Investment In And Advances To Affiliate Related To Investing Activities PaymentsForProceedsFromInvestmentInAndAdvancesToAffiliateRelatedToInvestingActivities	0	USD
CY2017	cwt	Payments For Proceeds From Investment In And Advances To Affiliate Related To Investing Activities PaymentsForProceedsFromInvestmentInAndAdvancesToAffiliateRelatedToInvestingActivities	0	USD
CY2018	cwt	Payments For Proceeds From Investment In And Advances To Affiliate Related To Investing Activities PaymentsForProceedsFromInvestmentInAndAdvancesToAffiliateRelatedToInvestingActivities	0	USD
CY2016	cwt	Paymentsfor Affiliate Longterm Debt PaymentsforAffiliateLongtermDebt	0	USD
CY2017	cwt	Paymentsfor Affiliate Longterm Debt PaymentsforAffiliateLongtermDebt	0	USD
CY2018	cwt	Paymentsfor Affiliate Longterm Debt PaymentsforAffiliateLongtermDebt	0	USD
CY2016	cwt	Paymentsfor Affiliate Short Term Borrowings PaymentsforAffiliateShortTermBorrowings	0	USD
CY2018	cwt	Paymentsfor Affiliate Short Term Borrowings PaymentsforAffiliateShortTermBorrowings	0	USD
CY2016	cwt	Paymentsfor Long Term Debtfrom Affiliate PaymentsforLongTermDebtfromAffiliate	0	USD
CY2017	cwt	Paymentsfor Long Term Debtfrom Affiliate PaymentsforLongTermDebtfromAffiliate	0	USD
CY2018	cwt	Paymentsfor Long Term Debtfrom Affiliate PaymentsforLongTermDebtfromAffiliate	0	USD
CY2016	cwt	Paymentsfor Shortterm Debtfrom Affiliate PaymentsforShorttermDebtfromAffiliate	0	USD
CY2018	cwt	Paymentsfor Shortterm Debtfrom Affiliate PaymentsforShorttermDebtfromAffiliate	0	USD
CY2016	cwt	Proceedsfrom Affiliate Short Term Borrowings ProceedsfromAffiliateShortTermBorrowings	0	USD
CY2017	cwt	Proceedsfrom Affiliate Short Term Borrowings ProceedsfromAffiliateShortTermBorrowings	0	USD
CY2018	cwt	Proceedsfrom Affiliate Short Term Borrowings ProceedsfromAffiliateShortTermBorrowings	0	USD
CY2016	cwt	Proceedsfrom Issuanceof Shortterm Debtfrom Affiliate ProceedsfromIssuanceofShorttermDebtfromAffiliate	0	USD
CY2017	cwt	Proceedsfrom Issuanceof Shortterm Debtfrom Affiliate ProceedsfromIssuanceofShorttermDebtfromAffiliate	0	USD
CY2018	cwt	Proceedsfrom Issuanceof Shortterm Debtfrom Affiliate ProceedsfromIssuanceofShorttermDebtfromAffiliate	0	USD
CY2017Q4	cwt	Regulatory And Other Liabilities RegulatoryAndOtherLiabilities	221032000	USD
CY2018Q4	cwt	Regulatory And Other Liabilities RegulatoryAndOtherLiabilities	256522000	USD
CY2016	cwt	Regulatory Balancing Account Revenue RegulatoryBalancingAccountRevenue	19842000	USD
CY2017	cwt	Regulatory Balancing Account Revenue RegulatoryBalancingAccountRevenue	53639000	USD
CY2018	cwt	Regulatory Balancing Account Revenue RegulatoryBalancingAccountRevenue	23460000	USD
CY2017Q4	cwt	Tax Cutsand Jobs Actof2017 Incomplete Accounting Provisional Benefit Estimate TaxCutsandJobsActof2017IncompleteAccountingProvisionalBenefitEstimate	108000000	USD
CY2018Q4	cwt	Tax Cutsand Jobs Actof2017 Incomplete Accounting Ratepayer Net Refund TaxCutsandJobsActof2017IncompleteAccountingRatepayerNetRefund	107000000	USD
CY2018Q4	cwt	Tax Cutsand Jobs Actof2017 Refund Gross Up TaxCutsandJobsActof2017RefundGrossUp	42000000	USD
CY2018Q4	cwt	Tax Cutsand Jobs Actof2017 Regulatory Liabilities TaxCutsandJobsActof2017RegulatoryLiabilities	149000000	USD
CY2017Q4	cwt	Taxes Prepaid Expenses And Other Assets Current TaxesPrepaidExpensesAndOtherAssetsCurrent	11180000	USD
CY2018Q4	cwt	Taxes Prepaid Expenses And Other Assets Current TaxesPrepaidExpensesAndOtherAssetsCurrent	11981000	USD
CY2017Q4	cwt	Total Other Assets TotalOtherAssets	468872000	USD
CY2018Q4	cwt	Total Other Assets TotalOtherAssets	416279000	USD
CY2016	cwt	Utilities Nonregulated Expense Income Tax Expense Benefit UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit	-2419000	USD
CY2017	cwt	Utilities Nonregulated Expense Income Tax Expense Benefit UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit	1548000	USD
CY2018	cwt	Utilities Nonregulated Expense Income Tax Expense Benefit UtilitiesNonregulatedExpenseIncomeTaxExpenseBenefit	-2717000	USD
CY2016	cwt	Utilities Operating Expense Income Tax Expense Benefit UtilitiesOperatingExpenseIncomeTaxExpenseBenefit	29235000	USD
CY2017	cwt	Utilities Operating Expense Income Tax Expense Benefit UtilitiesOperatingExpenseIncomeTaxExpenseBenefit	35279000	USD
CY2018	cwt	Utilities Operating Expense Income Tax Expense Benefit UtilitiesOperatingExpenseIncomeTaxExpenseBenefit	18589000	USD
CY2016	cwt	Utility Plant Contribution By Developers UtilityPlantContributionByDevelopers	16824000	USD
CY2017	cwt	Utility Plant Contribution By Developers UtilityPlantContributionByDevelopers	19898000	USD
CY2018	cwt	Utility Plant Contribution By Developers UtilityPlantContributionByDevelopers	20609000	USD
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0001035201
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	48067000	shares
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q2	dei	Entity Public Float EntityPublicFloat	1872000000	USD
CY2018	dei	Entity Registrant Name EntityRegistrantName	CALIFORNIA WATER SERVICE GROUP
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	93955000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	95580000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	32451000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	30037000	USD
CY2017Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	3888000	USD
CY2018Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	4182000	USD
CY2017Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	36671000	USD
CY2018Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	33506000	USD
CY2017Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	1724000	USD
CY2018Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	1649000	USD
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	336229000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	337623000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	773000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	757000	USD
CY2016	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	900000	USD
CY2016	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	871000	USD
CY2017	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	900000	USD
CY2017	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	920000	USD
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1099000	USD
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1100000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1600000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1600000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1700000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	21200000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	24300000	USD
CY2017Q4	us-gaap	Assets Assets	2744710000	USD
CY2018Q4	us-gaap	Assets Assets	2837704000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	227873000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	188702000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	1477000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	1170000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	1170000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	1170000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	1170000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	3217000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	69365000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-47585000	USD
CY2016	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	16589000	USD
CY2017Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	1215014000	USD
CY2018Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	1440184000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	94776000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	47176000	USD
CY2015Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9346000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	25935000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	95300000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	47715000	USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.690
CY2017Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.18
CY2017Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.18
CY2017Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.18
CY2017Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.18
CY2017	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.720
CY2018Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.1875
CY2018Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.1875
CY2018Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.1875
CY2018Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.1875
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.750
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	68000000	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	68000000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	48012432	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	48064707	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	48012000	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	48012432	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	48065000	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	48064707	shares
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	480000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	481000	USD
CY2017Q4	us-gaap	Contract With Customer Refund Liability Noncurrent ContractWithCustomerRefundLiabilityNoncurrent	182502000	USD
CY2018Q4	us-gaap	Contract With Customer Refund Liability Noncurrent ContractWithCustomerRefundLiabilityNoncurrent	186342000	USD
CY2017Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	186721000	USD
CY2018Q4	us-gaap	Contributions In Aid Of Construction ContributionsInAidOfConstruction	225270000	USD
CY2016	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	181515000	USD
CY2017	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	199081000	USD
CY2018	us-gaap	Cost Of Purchased Water CostOfPurchasedWater	207103000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	130000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	35881000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	15869000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	291396000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	132000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	15995000	USD
CY2017Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	3889000	USD
CY2018Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	3762000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3000	USD
CY2017Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0205
CY2018Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0291
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	26603000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	26684000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	36824000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	317434000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	194617000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	213033000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	81000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	943000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-126000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	96779000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	104401000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	13329000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	8257000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	280000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	4273000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	41712000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Regulatory Assets And Liabilities DeferredTaxAssetsRegulatoryAssetsAndLiabilities	44072000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	7906000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	8725000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	194617000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	213033000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	194617000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	213033000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2550000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2542000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	262442000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	288544000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	26404000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	26348000	USD
CY2018	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1	22137000	USD
CY2018	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1	3017000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	6000000	USD
CY2018	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.2
CY2016	us-gaap	Dividends Common Stock DividendsCommonStock	33081000	USD
CY2018	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation	29286000	USD
CY2018	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents	4213000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.063
CY2016	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	8900000	USD
CY2017	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	8500000	USD
CY2018	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	8800000	USD
CY2016	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	10873000	USD
CY2017	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	9588000	USD
CY2018	us-gaap	Defined Benefit Plan Other Costs DefinedBenefitPlanOtherCosts	9308000	USD
CY2018Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.045
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	5400000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	5600000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	65203000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	78592000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	85707000	USD
CY2017	us-gaap	Dividends Common Stock DividendsCommonStock	34563000	USD
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	36043000	USD
CY2017Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2018Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2017Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2018Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.02
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.52
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.36
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.01
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.05
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.42
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.74
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.52
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.02
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.75
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.32
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.36
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	23916000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	20229000	USD
CY2016	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	26733000	USD
CY2017	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	35881000	USD
CY2018	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	15995000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	11218000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	12893000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	2600000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	100781000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	2615000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	50000	USD
CY2017	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	1500000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1600000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	800000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	900000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1100000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1100000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	18432000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	20967000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	7214000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	8074000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-146000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	663000	USD
CY2016	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	87601000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	93326000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	2615000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26816000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36827000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15872000	USD
CY2016	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	84900000	USD
CY2017	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	85700000	USD
CY2018	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	99000000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	26422000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	38419000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	17105000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-4298000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-4584000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	-5954000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	0	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-581000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-278000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	425000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-842000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	494000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4341000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6017000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5685000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	74000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	74000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	74000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	3839000	USD
CY2017	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	4528000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	3671000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	1564000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	4701000	USD
CY2016	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	2047000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	321166000	USD
CY2016	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1026000	USD
CY2017	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	3058000	USD
CY2018	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	-2334000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	531713000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	814938000	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	15920000	USD
CY2016	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-26818000	USD
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-21087000	USD
CY2018	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-20909000	USD
CY2016	us-gaap	Increase Decrease In Due To Affiliates IncreaseDecreaseInDueToAffiliates	0	USD
CY2017	us-gaap	Increase Decrease In Due To Affiliates IncreaseDecreaseInDueToAffiliates	0	USD
CY2018	us-gaap	Increase Decrease In Due To Affiliates IncreaseDecreaseInDueToAffiliates	0	USD
CY2016	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	4056000	USD
CY2017	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	2164000	USD
CY2018	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-4382000	USD
CY2016	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	-6906000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	-13752000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	12644000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-6781000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	36389000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-16483000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1276000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	3718000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	587000	USD
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	343000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	31871000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-20422000	USD
CY2016	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	0	USD
CY2017	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	0	USD
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2016	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2965000	USD
CY2017	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2360000	USD
CY2018	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	2063000	USD
CY2016	us-gaap	Interest Costs Incurred InterestCostsIncurred	30501000	USD
CY2017	us-gaap	Interest Costs Incurred InterestCostsIncurred	33928000	USD
CY2018	us-gaap	Interest Costs Incurred InterestCostsIncurred	37854000	USD
CY2016	us-gaap	Interest Expense Debt InterestExpenseDebt	33466000	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	36288000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	39917000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	28038000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	32223000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	35941000	USD
CY2017Q4	us-gaap	Interest Payable Current InterestPayableCurrent	6122000	USD
CY2018Q4	us-gaap	Interest Payable Current InterestPayableCurrent	5674000	USD
CY2017Q4	us-gaap	Investments In And Advances To Affiliates Amount Of Equity InvestmentsInAndAdvancesToAffiliatesAmountOfEquity	0	USD
CY2018Q4	us-gaap	Investments In And Advances To Affiliates Amount Of Equity InvestmentsInAndAdvancesToAffiliatesAmountOfEquity	0	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2744710000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2837704000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	490959000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	710027000	USD
CY2018Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	2300000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	87050000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	128094000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	104911000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	515793000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	46478000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-230905000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-206571000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-273082000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	160444000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	147842000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	179019000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	2572000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	19971000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	35289000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	15108000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	-762000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	14805000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	36173000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	15368000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	48675000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	72940000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	65584000	USD
CY2016	us-gaap	Noncash Or Part Noncash Acquisition Payables Assumed1 NoncashOrPartNoncashAcquisitionPayablesAssumed1	27150000	USD
CY2017	us-gaap	Noncash Or Part Noncash Acquisition Payables Assumed1 NoncashOrPartNoncashAcquisitionPayablesAssumed1	41017000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Payables Assumed1 NoncashOrPartNoncashAcquisitionPayablesAssumed1	38807000	USD
CY2016	us-gaap	Noncash Project Abandonment Costs NoncashProjectAbandonmentCosts	3221000	USD
CY2017	us-gaap	Noncash Project Abandonment Costs NoncashProjectAbandonmentCosts	1293000	USD
CY2018	us-gaap	Noncash Project Abandonment Costs NoncashProjectAbandonmentCosts	410000	USD
CY2017Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	16464000	USD
CY2018Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	17101000	USD
CY2017Q4	us-gaap	Notes Receivable Related Parties Noncurrent NotesReceivableRelatedPartiesNoncurrent	0	USD
CY2018Q4	us-gaap	Notes Receivable Related Parties Noncurrent NotesReceivableRelatedPartiesNoncurrent	0	USD
CY2018	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	82636000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	11993000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	28111000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	43902000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	23077000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	107083000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	9836000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	26839000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	47329000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	26536000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	110540000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	6115000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	7381000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	17643000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	18567000	USD
CY2017Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	63390000	USD
CY2018Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	62710000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	60775000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	60095000	USD
CY2017Q4	us-gaap	Other Indefinite Lived Intangible Assets OtherIndefiniteLivedIntangibleAssets	3780000	USD
CY2018Q4	us-gaap	Other Indefinite Lived Intangible Assets OtherIndefiniteLivedIntangibleAssets	3776000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	44421000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	45247000	USD
CY2016	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	11445000	USD
CY2017	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	9390000	USD
CY2018	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	22787000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3460000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-215000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-7102000	USD
CY2017Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	252141000	USD
CY2018Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	193538000	USD
CY2018	us-gaap	Other Research And Development Expense OtherResearchAndDevelopmentExpense	5400000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	744000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1505000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1645000	USD
CY2016	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	0	USD
CY2017	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	0	USD
CY2018	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	0	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	33081000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	34563000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	36043000	USD
CY2016	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	2857000	USD
CY2017	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	5605000	USD
CY2018	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	4925000	USD
CY2016	us-gaap	Payments To Acquire Water And Waste Water Systems PaymentsToAcquireWaterAndWasteWaterSystems	228938000	USD
CY2017	us-gaap	Payments To Acquire Water And Waste Water Systems PaymentsToAcquireWaterAndWasteWaterSystems	259194000	USD
CY2018	us-gaap	Payments To Acquire Water And Waste Water Systems PaymentsToAcquireWaterAndWasteWaterSystems	271707000	USD
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	241000	shares
CY2017Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2017Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2016	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	21448000	USD
CY2017	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	21369000	USD
CY2018	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	18612000	USD
CY2016	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	0	USD
CY2017	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	0	USD
CY2018	us-gaap	Proceeds From Dividends Received ProceedsFromDividendsReceived	0	USD
CY2016	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	0	USD
CY2017	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	1697000	USD
CY2018	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	49823000	USD
CY2017	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	299383000	USD
CY2016	us-gaap	Proceeds From Legal Settlements ProceedsFromLegalSettlements	0	USD
CY2017	us-gaap	Proceeds From Legal Settlements ProceedsFromLegalSettlements	56004000	USD
CY2018	us-gaap	Proceeds From Legal Settlements ProceedsFromLegalSettlements	0	USD
CY2016	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	495000	USD
CY2017	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1558000	USD
CY2018	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	3491000	USD
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	395000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	666000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	59000	USD
CY2016	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	145100000	USD
CY2017	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	265000000	USD
CY2018	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	151000000	USD
CY2016	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	0	USD
CY2017	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3750000	USD
CY2018	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	3954000	USD
CY2017Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	6463000	USD
CY2018Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	6586000	USD
CY2017Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	922214000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	996723000	USD
CY2018	us-gaap	Public Utilities Property Plant And Equipment Common Useful Life PublicUtilitiesPropertyPlantAndEquipmentCommonUsefulLife	P50Y
CY2017Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	175693000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Construction Work In Progress PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress	210260000	USD
CY2016	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0270
CY2017	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0300
CY2018	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0302
CY2017Q4	us-gaap	Public Utilities Property Plant And Equipment Equipment PublicUtilitiesPropertyPlantAndEquipmentEquipment	2729757000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Equipment PublicUtilitiesPropertyPlantAndEquipmentEquipment	2950424000	USD
CY2017Q4	us-gaap	Public Utilities Property Plant And Equipment Land PublicUtilitiesPropertyPlantAndEquipmentLand	42517000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Land PublicUtilitiesPropertyPlantAndEquipmentLand	44019000	USD
CY2017Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	2047965000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	2232723000	USD
CY2017Q4	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	22212000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Other Property Plant And Equipment PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment	24743000	USD
CY2017Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	2970179000	USD
CY2018Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	3229446000	USD
CY2016	us-gaap	Pump Taxes PumpTaxes	11298000	USD
CY2017	us-gaap	Pump Taxes PumpTaxes	13924000	USD
CY2018	us-gaap	Pump Taxes PumpTaxes	14664000	USD
CY2017Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	29756000	USD
CY2018Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	33427000	USD
CY2017Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	115454000	USD
CY2018Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	122959000	USD
CY2016	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	609370000	USD
CY2017Q1	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	124342000	USD
CY2017Q2	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	173438000	USD
CY2017Q3	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	214037000	USD
CY2017Q4	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	164296000	USD
CY2017	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	676113000	USD
CY2018Q1	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	134553000	USD
CY2018Q2	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	174938000	USD
CY2018Q3	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	221288000	USD
CY2018Q4	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	167417000	USD
CY2018	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	698196000	USD
CY2017Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	36800000	USD
CY2017Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	36783000	USD
CY2018Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	42400000	USD
CY2018Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	42394000	USD
CY2017Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	405482000	USD
CY2018Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	353569000	USD
CY2017Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	59303000	USD
CY2017Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	59300000	USD
CY2018Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	12200000	USD
CY2018Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	12213000	USD
CY2017Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	176611000	USD
CY2018Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	211275000	USD
CY2016	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	6885000	USD
CY2017	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	8378000	USD
CY2018	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	7297000	USD
CY2016	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	6996000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	26829000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	16532000	USD
CY2016	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	81615000	USD
CY2017	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	87000000	USD
CY2018	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	361000000	USD
CY2017Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	524000	USD
CY2018Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	539000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	362512000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	392053000	USD
CY2016	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	589528000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	622474000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	674736000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	2849000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	3118000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	3141000	USD
CY2017Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	275100000	USD
CY2018Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	65100000	USD
CY2016	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	83000	USD
CY2017	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	946000	USD
CY2018	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-123000	USD
CY2016	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1722000	USD
CY2017	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1373000	USD
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1395000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	642155000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	659471000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	699221000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	730157000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	10298000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	10499000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	11058000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	9716000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	1787000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	3129000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	201000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	559000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2900000	USD
CY2016	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	16585000	USD
CY2017	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	15898000	USD
CY2018	us-gaap	Unregulated Operating Revenue UnregulatedOperatingRevenue	18272000	USD
CY2016	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	526734000	USD
CY2017	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	569030000	USD
CY2018	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	587656000	USD
CY2016	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	63599000	USD
CY2017	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	76783000	USD
CY2018	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	83781000	USD
CY2016	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	22993000	USD
CY2017	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	22530000	USD
CY2018	us-gaap	Utilities Operating Expense Maintenance UtilitiesOperatingExpenseMaintenance	24494000	USD
CY2016	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	80082000	USD
CY2017	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	74448000	USD
CY2018	us-gaap	Utilities Operating Expense Other UtilitiesOperatingExpenseOther	79868000	USD
CY2016	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	23231000	USD
CY2017	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	24797000	USD
CY2018	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	27296000	USD
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47956000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48009000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48060000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	47953000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	48009000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	48060000	shares
CY2017Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	6640000	USD
CY2018Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	5896000	USD

Files In Submission

Name	View Source	Status
0001035201-19-000003-index-headers.html	Edgar Link	pending
0001035201-19-000003-index.html	Edgar Link	pending
0001035201-19-000003.txt	Edgar Link	pending
0001035201-19-000003-xbrl.zip	Edgar Link	pending
chart-062dd3be4a9b538ba89.jpg	Edgar Link	pending
cwt-12312018x10k.htm	Edgar Link	pending
cwt-20181231.xml	Edgar Link	completed
cwt-20181231.xsd	Edgar Link	pending
cwt-20181231xex21.htm	Edgar Link	pending
cwt-20181231xex231.htm	Edgar Link	pending
cwt-20181231xex311.htm	Edgar Link	pending
cwt-20181231xex312.htm	Edgar Link	pending
cwt-20181231xex32.htm	Edgar Link	pending
cwt-20181231xex42.htm	Edgar Link	pending
cwt-20181231_cal.xml	Edgar Link	unprocessable
cwt-20181231_def.xml	Edgar Link	unprocessable
cwt-20181231_lab.xml	Edgar Link	unprocessable
cwt-20181231_pre.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
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R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$CWT
CALIFORNIA WATER SERVICE GROUP Stock $cwt

2017 Q4 Form 10-K Financial Statement

#000103520119000003 Filed on February 28, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CWT CALIFORNIA WATER SERVICE GROUP Stock $cwt

2017 Q4 Form 10-K Financial Statement

#000103520119000003 Filed on February 28, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CWT
CALIFORNIA WATER SERVICE GROUP Stock $cwt