$AWR
AMERICAN STATES WATER CO Stock $awr

$awr Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000105690321000021 Filed on February 22, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$124.2M	$113.0M	$134.5M
YoY Change	9.92%	1.79%	8.31%
Cost Of Revenue	$24.10M	$22.40M	$12.89M
YoY Change	7.59%	2.75%	-5.33%
Gross Profit	$100.1M	$90.60M	$121.6M
YoY Change	10.49%	1.57%	9.99%
Gross Profit Margin	80.6%	80.18%	90.41%
Selling, General & Admin	$19.60M	$21.20M	$20.60M
YoY Change	-7.55%	3.41%	-4.63%
% of Gross Profit	19.58%	23.4%	16.94%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$9.800M	$9.000M	$9.006M
YoY Change	8.89%	-15.89%	-10.99%
% of Gross Profit	9.79%	9.93%	7.41%
Operating Expenses	$70.80M	$65.90M	$91.77M
YoY Change	7.44%	-0.9%	1.73%
Operating Profit	$29.28M	$24.72M	$42.72M
YoY Change	18.42%	8.68%	25.75%
Interest Expense	-$4.600M	-$5.100M	$6.279M
YoY Change	-9.8%	37.84%	5.56%
% of Operating Profit	-15.71%	-20.63%	14.7%
Other Income/Expense, Net	$2.500M	$1.200M	-$5.313M
YoY Change	108.33%	-209.09%	30.09%
Pretax Income	$27.20M	$20.80M	$37.41M
YoY Change	30.77%	16.2%	25.16%
Income Tax	$7.000M	$4.100M	$9.405M
% Of Pretax Income	25.74%	19.71%	25.14%
Net Earnings	$20.21M	$16.70M	$28.01M
YoY Change	21.02%	21.11%	22.02%
Net Earnings / Revenue	16.27%	14.78%	20.82%
Basic Earnings Per Share	$0.55	$0.45	$0.76
Diluted Earnings Per Share	$0.54	$0.45	$0.76
COMMON SHARES
Basic Shares Outstanding	36.89M shares	36.84M shares	36.84M shares
Diluted Shares Outstanding			37.00M shares

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$36.70M	$1.300M	$10.40M
YoY Change	2723.08%	-81.69%	420.0%
Cash & Equivalents	$36.74M	$1.334M	$10.40M
Short-Term Investments
Other Short-Term Assets	$44.50M	$46.80M	$42.40M
YoY Change	-4.91%	1.3%	-21.77%
Inventory	$8.600M	$6.400M	$6.100M
Prepaid Expenses
Receivables	$29.16M	$20.91M	$28.09M
Other Receivables	$100.0K	$5.700M	$200.0K
Total Short-Term Assets	$157.1M	$122.5M	$132.5M
YoY Change	28.3%	-6.85%	-1.8%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.512B	$1.416B	$1.378B
YoY Change	6.8%	9.21%	9.14%
Goodwill	$1.116M	$1.116M	$1.116M
YoY Change	0.0%	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$10.60M	$7.702M	$5.426M
YoY Change	37.59%	44.72%	-4.81%
Total Long-Term Assets	$1.634B	$1.519B	$1.472B
YoY Change	7.61%	10.87%	10.66%
TOTAL ASSETS
Total Short-Term Assets	$157.1M	$122.5M	$132.5M
Total Long-Term Assets	$1.634B	$1.519B	$1.472B
Total Assets	$1.792B	$1.641B	$1.604B
YoY Change	9.16%	9.32%	9.51%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$63.79M	$55.62M	$59.77M
YoY Change	14.69%	-6.58%	18.48%
Accrued Expenses	$4.832M	$3.050M	$6.488M
YoY Change	58.43%	-21.09%	-1.1%
Deferred Revenue	$1.800M	$11.17M	$12.69M
YoY Change	-83.88%	48.3%
Short-Term Debt	$0.00	$5.000M	$0.00
YoY Change	-100.0%
Long-Term Debt Due	$400.0K	$344.0K	$344.0K
YoY Change	16.28%	-99.15%	-99.15%
Total Short-Term Liabilities	$118.6M	$116.0M	$119.8M
YoY Change	2.22%	-20.87%	-16.3%
LONG-TERM LIABILITIES
Long-Term Debt	$440.3M	$281.0M	$281.0M
YoY Change	56.71%	-0.03%	0.0%
Other Long-Term Liabilities	$15.43M	$13.93M	$11.09M
YoY Change	10.83%	23.65%	-1.12%
Total Long-Term Liabilities	$591.0M	$642.8M	$292.1M
YoY Change	-8.06%	24.69%	-0.05%
TOTAL LIABILITIES
Total Short-Term Liabilities	$118.6M	$116.0M	$119.8M
Total Long-Term Liabilities	$591.0M	$642.8M	$292.1M
Total Liabilities	$709.6M	$758.8M	$411.9M
YoY Change	-6.49%	14.6%	-5.39%
SHAREHOLDERS EQUITY
Retained Earnings	$385.0M	$346.0M	$340.5M
YoY Change	11.29%	13.6%	13.17%
Common Stock	$256.7M	$255.6M	$255.4M
YoY Change	0.43%	0.74%	0.85%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$641.7M	$601.5M	$595.9M
YoY Change
Total Liabilities & Shareholders Equity	$1.792B	$1.641B	$1.604B
YoY Change	9.16%	9.32%	9.51%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	$20.21M	$16.70M	$28.01M
YoY Change	21.02%	21.11%	22.02%
Depreciation, Depletion And Amortization	$9.800M	$9.000M	$9.006M
YoY Change	8.89%	-15.89%	-10.99%
Cash From Operating Activities	$34.40M	$32.60M	$39.60M
YoY Change	5.52%	14.79%	-8.55%
INVESTING ACTIVITIES
Capital Expenditures	-$35.60M	-$40.80M	-$29.90M
YoY Change	-12.75%	3.82%	4.91%
Acquisitions
YoY Change
Other Investing Activities	-$1.400M	-$1.700M	$100.0K
YoY Change	-17.65%	1600.0%	-106.67%
Cash From Investing Activities	-$37.00M	-$42.50M	-$29.80M
YoY Change	-12.94%	8.42%	-1.0%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	31.20M	900.0K	-1.000M
YoY Change	3366.67%	-94.41%	-94.05%
NET CHANGE
Cash From Operating Activities	34.40M	32.60M	39.60M
Cash From Investing Activities	-37.00M	-42.50M	-29.80M
Cash From Financing Activities	31.20M	900.0K	-1.000M
Net Change In Cash	28.60M	-9.000M	8.800M
YoY Change	-417.78%	-269.81%	-344.44%
FREE CASH FLOW
Cash From Operating Activities	$34.40M	$32.60M	$39.60M
Capital Expenditures	-$35.60M	-$40.80M	-$29.90M
Free Cash Flow	$70.00M	$73.40M	$69.50M
YoY Change	-4.63%	8.42%	-3.2%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001056903
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-14431
CY2020	dei	Entity Registrant Name EntityRegistrantName	American States Water Company
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	95-4676679
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	CA
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	630 E. Foothill Boulevard,
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	San Dimas
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	91773-1212
CY2020	dei	City Area Code CityAreaCode	(909)
CY2020	dei	Local Phone Number LocalPhoneNumber	394-3600
CY2020	dei	Security12b Title Security12bTitle	American States Water Company Common Shares
CY2020	dei	Trading Symbol TradingSymbol	AWR
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	2900179000	USD
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CY2019	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	319830000	USD
CY2018	us-gaap	Regulated Operating Revenue Water RegulatedOperatingRevenueWater	295258000	USD
CY2020	us-gaap	Regulated Operating Revenue Electric Non Nuclear RegulatedOperatingRevenueElectricNonNuclear	37024000	USD
CY2019	us-gaap	Regulated Operating Revenue Electric Non Nuclear RegulatedOperatingRevenueElectricNonNuclear	39548000	USD
CY2018	us-gaap	Regulated Operating Revenue Electric Non Nuclear RegulatedOperatingRevenueElectricNonNuclear	34350000	USD
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	120582000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	114491000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	107208000	USD
CY2020	us-gaap	Revenues Revenues	488243000	USD
CY2019	us-gaap	Revenues Revenues	473869000	USD
CY2018	us-gaap	Revenues Revenues	436816000	USD
CY2020	awr	Utilities Operating Expense Water Purchased UtilitiesOperatingExpenseWaterPurchased	74554000	USD
CY2019	awr	Utilities Operating Expense Water Purchased UtilitiesOperatingExpenseWaterPurchased	72289000	USD
CY2018	awr	Utilities Operating Expense Water Purchased UtilitiesOperatingExpenseWaterPurchased	68904000	USD
CY2020	awr	Power Purchased For Pumping PowerPurchasedForPumping	10134000	USD
CY2019	awr	Power Purchased For Pumping PowerPurchasedForPumping	8660000	USD
CY2018	awr	Power Purchased For Pumping PowerPurchasedForPumping	8971000	USD
CY2020	awr	Groundwater Production Assessment GroundwaterProductionAssessment	20392000	USD
CY2019	awr	Groundwater Production Assessment GroundwaterProductionAssessment	18962000	USD
CY2018	awr	Groundwater Production Assessment GroundwaterProductionAssessment	19440000	USD
CY2020	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	10423000	USD
CY2019	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	11796000	USD
CY2018	us-gaap	Utilities Operating Expense Purchased Power UtilitiesOperatingExpensePurchasedPower	11590000	USD
CY2020	awr	Supply Cost Balancing Accounts SupplyCostBalancingAccounts	-11803000	USD
CY2019	awr	Supply Cost Balancing Accounts SupplyCostBalancingAccounts	-7026000	USD
CY2018	awr	Supply Cost Balancing Accounts SupplyCostBalancingAccounts	-15649000	USD
CY2020	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	33236000	USD
CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	32756000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	31650000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	83615000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	83034000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	82595000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	36850000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	35397000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	40425000	USD
CY2020	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	15702000	USD
CY2019	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	15466000	USD
CY2018	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	15682000	USD
CY2020	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	22199000	USD
CY2019	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	20042000	USD
CY2018	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	18404000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	62411000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	55673000	USD
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	53906000	USD
CY2020	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	-31000	USD
CY2019	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	253000	USD
CY2018	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	85000	USD
CY2020	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	357744000	USD
CY2019	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	346796000	USD
CY2018	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	335833000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	130499000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	127073000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	100983000	USD
CY2020	us-gaap	Interest Expense InterestExpense	22531000	USD
CY2019	us-gaap	Interest Expense InterestExpense	24586000	USD
CY2018	us-gaap	Interest Expense InterestExpense	23433000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	1801000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	3249000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	3578000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4853000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3276000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	760000	USD
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-15877000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-18061000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-19095000	USD
CY2020	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	114622000	USD
CY2019	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	109012000	USD
CY2018	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	81888000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	28197000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24670000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18017000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	86425000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	84342000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	63871000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36880000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36814000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36733000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.34
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.28
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.73
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	36995000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	36964000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	36936000	shares
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.33
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.28
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.72
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.28
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.16
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.06
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	529945000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	63871000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	546000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2798000	USD
CY2018	awr	Dividends Equivalent Rights On Share Based Compensation Not Paid In Cash Net Of Tax DividendsEquivalentRightsOnShareBasedCompensationNotPaidInCashNetOfTax	221000	USD
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	38937000	USD
CY2018	awr	Dividends Equivalent Rights On Share Based Compensation Net Of Tax DividendsEquivalentRightsOnShareBasedCompensationNetOfTax	221000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	558223000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	84342000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	519000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1148000	USD
CY2019	awr	Dividends Equivalent Rights On Share Based Compensation Not Paid In Cash Net Of Tax DividendsEquivalentRightsOnShareBasedCompensationNotPaidInCashNetOfTax	210000	USD
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	42702000	USD
CY2019	awr	Dividends Equivalent Rights On Share Based Compensation Net Of Tax DividendsEquivalentRightsOnShareBasedCompensationNetOfTax	210000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	601530000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	86425000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	30000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	894000	USD
CY2020	awr	Dividends Equivalent Rights On Share Based Compensation Not Paid In Cash Net Of Tax DividendsEquivalentRightsOnShareBasedCompensationNotPaidInCashNetOfTax	176000	USD
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	47206000	USD
CY2020	awr	Dividends Equivalent Rights On Share Based Compensation Net Of Tax DividendsEquivalentRightsOnShareBasedCompensationNetOfTax	176000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	641673000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	86425000	USD
CY2020	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	3024000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	84342000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	63871000	USD
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	37204000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	35713000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	40663000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1433000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	608000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	841000	USD
CY2020	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	2243000	USD
CY2019	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	6623000	USD
CY2018	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-5773000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	2463000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	2517000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	3851000	USD
CY2020	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	-31000	USD
CY2019	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	253000	USD
CY2018	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	85000	USD
CY2019	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	3580000	USD
CY2018	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-558000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	908000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-526000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-97000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	13272000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-1882000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-1882000	USD
CY2020	awr	Increase Decrease In Unbilled Contracts Receivables IncreaseDecreaseInUnbilledContractsReceivables	6678000	USD
CY2019	awr	Increase Decrease In Unbilled Contracts Receivables IncreaseDecreaseInUnbilledContractsReceivables	5515000	USD
CY2018	awr	Increase Decrease In Unbilled Contracts Receivables IncreaseDecreaseInUnbilledContractsReceivables	-2823000	USD
CY2020	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	1204000	USD
CY2019	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-214000	USD
CY2018	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-5151000	USD
CY2020	awr	Increase Decrease Receivable From Government IncreaseDecreaseReceivableFromGovernment	3889000	USD
CY2019	awr	Increase Decrease Receivable From Government IncreaseDecreaseReceivableFromGovernment	-1144000	USD
CY2018	awr	Increase Decrease Receivable From Government IncreaseDecreaseReceivableFromGovernment	20976000	USD
CY2020	us-gaap	Increase Decrease In Materials And Supplies IncreaseDecreaseInMaterialsAndSupplies	2190000	USD
CY2019	us-gaap	Increase Decrease In Materials And Supplies IncreaseDecreaseInMaterialsAndSupplies	654000	USD
CY2018	us-gaap	Increase Decrease In Materials And Supplies IncreaseDecreaseInMaterialsAndSupplies	980000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1686000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-3978000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	519000	USD
CY2020	awr	Increase Decreasein Contract Assets IncreaseDecreaseinContractAssets	588000	USD
CY2019	awr	Increase Decreasein Contract Assets IncreaseDecreaseinContractAssets	-3979000	USD
CY2018	awr	Increase Decreasein Contract Assets IncreaseDecreaseinContractAssets	-5941000	USD
CY2020	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-10150000	USD
CY2019	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	11597000	USD
CY2018	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-33834000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	5348000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-249000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	1282000	USD
CY2020	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	12270000	USD
CY2019	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-3786000	USD
CY2018	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	2708000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-9367000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	3637000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	3619000	USD
CY2020	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	1444000	USD
CY2019	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	1994000	USD
CY2018	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-1086000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	2593000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-4659000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-928000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	122170000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	116864000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	136774000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	130423000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	151940000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	126561000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	88000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	169000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	72000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1275000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1424000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1553000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-131610000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-153195000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-128042000	USD
CY2020	awr	Proceeds From Issuance Of Common Shares And Stock Option Exercises ProceedsFromIssuanceOfCommonSharesAndStockOptionExercises	30000	USD
CY2019	awr	Proceeds From Issuance Of Common Shares And Stock Option Exercises ProceedsFromIssuanceOfCommonSharesAndStockOptionExercises	519000	USD
CY2018	awr	Proceeds From Issuance Of Common Shares And Stock Option Exercises ProceedsFromIssuanceOfCommonSharesAndStockOptionExercises	546000	USD
CY2020	us-gaap	Proceeds From Advances For Construction ProceedsFromAdvancesForConstruction	9338000	USD
CY2019	us-gaap	Proceeds From Advances For Construction ProceedsFromAdvancesForConstruction	10171000	USD
CY2018	us-gaap	Proceeds From Advances For Construction ProceedsFromAdvancesForConstruction	5551000	USD
CY2020	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	3729000	USD
CY2019	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	5005000	USD
CY2018	us-gaap	Repayments Of Advances For Construction RepaymentsOfAdvancesForConstruction	3886000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	336000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	40325000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	326000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	159413000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2020	us-gaap	Increase Decrease In Notes Payable Current IncreaseDecreaseInNotesPayableCurrent	-70800000	USD
CY2019	us-gaap	Increase Decrease In Notes Payable Current IncreaseDecreaseInNotesPayableCurrent	109500000	USD
CY2018	us-gaap	Increase Decrease In Notes Payable Current IncreaseDecreaseInNotesPayableCurrent	36500000	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	47206000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	42702000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	38937000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1867000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1634000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1253000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	44843000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	30524000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1805000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	35403000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-5807000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	6927000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1334000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	7141000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	214000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	36737000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1334000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	7141000	USD
CY2020	awr	Number Of Customers NumberOfCustomers	1000000	customer
CY2020Q4	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	9
CY2020	awr	Number Of Registrants Filing Combined Report NumberOfRegistrantsFilingCombinedReport	2	registrant
CY2020	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	4900000	USD
CY2019	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	4700000	USD
CY2018	us-gaap	Related Party Transaction Amounts Of Transaction RelatedPartyTransactionAmountsOfTransaction	4200000	USD
CY2020	us-gaap	Related Party Transaction Terms And Manner Of Settlement RelatedPartyTransactionTermsAndMannerOfSettlement	24
CY2020Q4	awr	Regulatory Asset Cema RegulatoryAssetCEMA	4400000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation Legally Restricted Assets Fair Value AssetRetirementObligationLegallyRestrictedAssetsFairValue	0	USD
CY2018	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2019	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2020	awr	Goodwill Acquired In Prior Period GoodwillAcquiredInPriorPeriod	1100000	USD
CY2019	awr	Goodwill Acquired In Prior Period GoodwillAcquiredInPriorPeriod	1100000	USD
CY2020	awr	Goodwill Acquired In Prior Period GoodwillAcquiredInPriorPeriod	1100000	USD
CY2020	awr	Period Of Refund Of Customer Advances For Construction PeriodOfRefundOfCustomerAdvancesForConstruction	P40Y
CY2020	awr	Revenue Performance Obligation Payment Terms RevenuePerformanceObligationPaymentTerms	P20D
CY2020	us-gaap	Revenues Revenues	488243000	USD
CY2019	us-gaap	Revenues Revenues	473869000	USD
CY2018	us-gaap	Revenues Revenues	436816000	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	10900000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	3200000000	USD
CY2020Q4	awr	Regulatory Asset Not Accruing Carrying Costs RegulatoryAssetNotAccruingCarryingCosts	19800000	USD
CY2020Q4	us-gaap	Net Regulatory Assets NetRegulatoryAssets	16539000	USD
CY2019Q4	us-gaap	Net Regulatory Assets NetRegulatoryAssets	-2450000	USD
CY2020Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	568326000	USD
CY2019Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	543263000	USD
CY2019Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	119547000	USD
CY2020Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	150145000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1512043000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1415705000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	30321000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	29989000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	24460000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	24309000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	5861000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	5861000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	5680000	USD
CY2020Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	399000	USD
CY2019Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	402000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	654000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1300000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1100000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	142000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	114000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	114000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	74000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	0	USD
CY2020Q4	awr	Finite Lived Intangible Assets Estimated Future Amortization Expense FiniteLivedIntangibleAssetsEstimatedFutureAmortizationExpense	444000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	5228000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	271000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	173000	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	86000	USD
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	3451000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	8863000	USD
CY2020	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	165000	USD
CY2020	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	58000	USD
CY2020	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	350000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	9320000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	86425000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	84342000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	63871000	USD
CY2020	awr	Weighted Average Dividends Common Stock WeightedAverageDividendsCommonStock	47206000	USD
CY2019	awr	Weighted Average Dividends Common Stock WeightedAverageDividendsCommonStock	42702000	USD
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	36995000	shares
CY2018	awr	Weighted Average Dividends Common Stock WeightedAverageDividendsCommonStock	38937000	USD
CY2020	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	158000	USD
CY2019	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	180000	USD
CY2018	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	204000	USD
CY2020	us-gaap	Undistributed Earnings UndistributedEarnings	39061000	USD
CY2019	us-gaap	Undistributed Earnings UndistributedEarnings	41460000	USD
CY2018	us-gaap	Undistributed Earnings UndistributedEarnings	24730000	USD
CY2020	awr	Undistributed Earnings Allocated To Common Stock UndistributedEarningsAllocatedToCommonStock	38930000	USD
CY2019	awr	Undistributed Earnings Allocated To Common Stock UndistributedEarningsAllocatedToCommonStock	41285000	USD
CY2018	awr	Undistributed Earnings Allocated To Common Stock UndistributedEarningsAllocatedToCommonStock	24601000	USD
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	-131000	USD
CY2019	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	-175000	USD
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	-129000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	86136000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	83987000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	63538000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36880000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36814000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36733000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.34
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.28
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.73
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	86136000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	83987000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	63538000	USD
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	-131000	USD
CY2019	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	-175000	USD
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	-129000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	86267000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	84162000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	63667000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36880000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36814000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36733000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	115000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	150000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	203000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	36964000	shares
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.28
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	36936000	shares
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.33
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.72
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1800	shares
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	30998	shares
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	32142	shares
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	30000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	519000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	546000	USD
CY2019	awr	Proceedsfrom Stock Options Exercised Distributedto Subsidiaries ProceedsfromStockOptionsExercisedDistributedtoSubsidiaries	0	USD
CY2020	awr	Proceedsfrom Stock Options Exercised Distributedto Subsidiaries ProceedsfromStockOptionsExercisedDistributedtoSubsidiaries	0	USD
CY2018	awr	Proceedsfrom Stock Options Exercised Distributedto Subsidiaries ProceedsfromStockOptionsExercisedDistributedtoSubsidiaries	0	USD
CY2020Q4	awr	Dividend Reinvestment Plan Common Stock Capital Shares Reserved For Future Issuance DividendReinvestmentPlanCommonStockCapitalSharesReservedForFutureIssuance	1055948	shares
CY2020Q4	awr	Defined Contribution Plan Common Stock Capital Shares Reserved For Future Issuance DefinedContributionPlanCommonStockCapitalSharesReservedForFutureIssuance	387300	shares
CY2020	us-gaap	Related Party Transaction Terms And Manner Of Settlement RelatedPartyTransactionTermsAndMannerOfSettlement	24
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	641700000	USD
CY2020Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	260000000.0	USD
CY2020Q4	us-gaap	Notes Payable To Bank NotesPayableToBank	134200000	USD
CY2020Q4	awr	Deferred Tax Assets Regulatory Assets And Liabilities Related To Itc And Excess Deferred Taxes DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesRelatedToITCAndExcessDeferredTaxes	32640000	USD
CY2019Q4	awr	Deferred Tax Assets Regulatory Assets And Liabilities Related To Itc And Excess Deferred Taxes DeferredTaxAssetsRegulatoryAssetsAndLiabilitiesRelatedToITCAndExcessDeferredTaxes	33080000	USD
CY2020Q4	awr	Deferred Tax Assets Contributions And Advances DeferredTaxAssetsContributionsAndAdvances	6390000	USD
CY2019Q4	awr	Deferred Tax Assets Contributions And Advances DeferredTaxAssetsContributionsAndAdvances	5777000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	6092000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	5792000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	45122000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	44649000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	146688000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	144444000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	22205000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets DeferredTaxLiabilitiesRegulatoryAssets	20641000	USD
CY2020Q4	awr	Deferred Tax Liabilities Balancing And Memorandum Accounts DeferredTaxLiabilitiesBalancingAndMemorandumAccounts	7401000	USD
CY2019Q4	awr	Deferred Tax Liabilities Balancing And Memorandum Accounts DeferredTaxLiabilitiesBalancingAndMemorandumAccounts	4868000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	176294000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	169953000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	131172000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	125304000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	19240000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	12507000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	17252000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6714000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5540000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6538000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	25954000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	18047000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	23790000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1814000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	6407000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-4334000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	429000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	216000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1439000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2243000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	6623000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5773000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	28197000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24670000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18017000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	24071000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	22872000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	17196000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5764000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4758000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3693000	USD
CY2020	awr	Incometaxratereconciliationexcessdeferredtaxamortization Incometaxratereconciliationexcessdeferredtaxamortization	1550000	USD
CY2019	awr	Incometaxratereconciliationexcessdeferredtaxamortization Incometaxratereconciliationexcessdeferredtaxamortization	1579000	USD
CY2018	awr	Incometaxratereconciliationexcessdeferredtaxamortization Incometaxratereconciliationexcessdeferredtaxamortization	2101000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	1056000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	1244000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Depreciation IncomeTaxReconciliationNondeductibleExpenseDepreciation	429000	USD
CY2020	awr	Income Tax Reconciliation Costof Removal IncomeTaxReconciliationCostofRemoval	1031000	USD
CY2019	awr	Income Tax Reconciliation Costof Removal IncomeTaxReconciliationCostofRemoval	1582000	USD
CY2018	awr	Income Tax Reconciliation Costof Removal IncomeTaxReconciliationCostofRemoval	1445000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	71000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	71000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	69000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-42000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-972000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	314000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	28197000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24670000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18017000	USD
CY2020	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	114622000	USD
CY2019	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	109012000	USD
CY2018	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	81888000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.246
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.226
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.220
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2700000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2500000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2400000	USD
CY2020	awr	Defined Benefit Plan Initial Health Care Cost Trend Rate For Employees Under Age Sixty Five DefinedBenefitPlanInitialHealthCareCostTrendRateForEmployeesUnderAgeSixtyFive	0.052
CY2020	awr	Defined Benefit Plan Ultimate Health Care Cost Trend Rate For Employees Under Age Sixty Five DefinedBenefitPlanUltimateHealthCareCostTrendRateForEmployeesUnderAgeSixtyFive	0.044
CY2020	awr	Defined Benefit Plan Initial Health Care Cost Trend Rate For Employees Of Age Sixty Five And Over DefinedBenefitPlanInitialHealthCareCostTrendRateForEmployeesOfAgeSixtyFiveAndOver	0.043
CY2020	awr	Defined Benefit Plan Ultimate Health Care Cost Trend Rate For Employees Of Age Sixty Five And Over DefinedBenefitPlanUltimateHealthCareCostTrendRateForEmployeesOfAgeSixtyFiveAndOver	0.040
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1900000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1600000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1300000	USD
CY2020	awr	Number Of Stock Incentive Plans NumberOfStockIncentivePlans	3	stock_plan
CY2020	awr	Share Based Compensation Arrangementsby Share Based Payment Award Options Minimum Agefor Awardsto Vest Immediately ShareBasedCompensationArrangementsbyShareBasedPaymentAwardOptionsMinimumAgeforAwardstoVestImmediately	P55Y
CY2020	awr	Share Based Compensation Arrangementsby Share Based Payment Award Options Minimum Agefor Awardsto Vest Immediately ShareBasedCompensationArrangementsbyShareBasedPaymentAwardOptionsMinimumAgeforAwardstoVestImmediately	P55Y
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2463000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2517000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3851000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	122000	USD
CY2020	awr	Termestimatefortheenvironmentalcleanup Termestimatefortheenvironmentalcleanup	P2Y
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	11100000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	2000000.0	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	9600000	USD
CY2020	us-gaap	Lease Cost LeaseCost	2873000	USD
CY2019	us-gaap	Lease Cost LeaseCost	3166000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	143000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	159000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y7M13D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y2M26D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.036
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.035
CY2020	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	27000	USD
CY2019	us-gaap	Operating Lease Payments Use OperatingLeasePaymentsUse	18034000	USD
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	2600000	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	2800000	USD
CY2018	us-gaap	Operating Lease Expense OperatingLeaseExpense	2500000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	2561000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	2318000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1825000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1503000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1324000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	3925000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	13456000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1807000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	11649000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	2013000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	2013000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	2013000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	9636000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	9636000	USD
CY2020	us-gaap	Revenues Revenues	488243000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	130499000	USD
CY2020	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	20730000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1512043000	USD
CY2018	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	126561000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	36850000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	28197000	USD
CY2020	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	130423000	USD
CY2019	us-gaap	Revenues Revenues	473869000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	127073000	USD
CY2019	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	21337000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1415705000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	35397000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24670000	USD
CY2019	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	151940000	USD
CY2018	us-gaap	Revenues Revenues	436816000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	100983000	USD
CY2018	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	19855000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1296310000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	40425000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18017000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1512043000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1415705000	USD
CY2020Q4	awr	Assets Other Than Property Plant And Equipment Net AssetsOtherThanPropertyPlantAndEquipmentNet	279560000	USD
CY2019Q4	awr	Assets Other Than Property Plant And Equipment Net AssetsOtherThanPropertyPlantAndEquipmentNet	225626000	USD
CY2020Q4	us-gaap	Assets Assets	1791603000	USD
CY2019Q4	us-gaap	Assets Assets	1641331000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	916000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	951000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1041000	USD
CY2020	awr	Provision For Doubtful Accounts Continuing Operation ProvisionForDoubtfulAccountsContinuingOperation	5016000	USD
CY2019	awr	Provision For Doubtful Accounts Continuing Operation ProvisionForDoubtfulAccountsContinuingOperation	609000	USD
CY2018	awr	Provision For Doubtful Accounts Continuing Operation ProvisionForDoubtfulAccountsContinuingOperation	841000	USD
CY2020	awr	Allowance For Doubtful Accounts Receivable Charge Offs Net Of Recoveries AllowanceForDoubtfulAccountsReceivableChargeOffsNetOfRecoveries	-616000	USD
CY2019	awr	Allowance For Doubtful Accounts Receivable Charge Offs Net Of Recoveries AllowanceForDoubtfulAccountsReceivableChargeOffsNetOfRecoveries	-644000	USD
CY2018	awr	Allowance For Doubtful Accounts Receivable Charge Offs Net Of Recoveries AllowanceForDoubtfulAccountsReceivableChargeOffsNetOfRecoveries	-931000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	5316000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	916000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	951000	USD
CY2020Q4	awr	Allowance For Doubtful Accounts Related To Receivable From Customer AllowanceForDoubtfulAccountsRelatedToReceivableFromCustomer	5263000	USD
CY2019Q4	awr	Allowance For Doubtful Accounts Related To Receivable From Customer AllowanceForDoubtfulAccountsRelatedToReceivableFromCustomer	857000	USD
CY2018Q4	awr	Allowance For Doubtful Accounts Related To Receivable From Customer AllowanceForDoubtfulAccountsRelatedToReceivableFromCustomer	892000	USD
CY2020Q4	awr	Allowance For Doubtful Accounts Related To Other Accounts Receivable AllowanceForDoubtfulAccountsRelatedToOtherAccountsReceivable	53000	USD
CY2019Q4	awr	Allowance For Doubtful Accounts Related To Other Accounts Receivable AllowanceForDoubtfulAccountsRelatedToOtherAccountsReceivable	59000	USD
CY2018Q4	awr	Allowance For Doubtful Accounts Related To Other Accounts Receivable AllowanceForDoubtfulAccountsRelatedToOtherAccountsReceivable	59000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	5316000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	916000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	951000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	13684000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	22496000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	21084000	USD
CY2020	us-gaap	Interest Paid InterestPaid	19941000	USD
CY2019	us-gaap	Interest Paid InterestPaid	25080000	USD
CY2018	us-gaap	Interest Paid InterestPaid	23471000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	27861000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	23736000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	27403000	USD
CY2020	us-gaap	Contribution Of Property ContributionOfProperty	3102000	USD
CY2019	us-gaap	Contribution Of Property ContributionOfProperty	6220000	USD
CY2018	us-gaap	Contribution Of Property ContributionOfProperty	2082000	USD
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	0	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	0	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	0	USD
CY2020	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	0	USD
CY2019	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	0	USD
CY2018	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	0	USD
CY2020Q3	awr	Restructuring And Related Costs Gain Loss On Transfer RestructuringAndRelatedCostsGainLossOnTransfer	0	USD
CY2020Q1	us-gaap	Revenues Revenues	109077000	USD
CY2020Q2	us-gaap	Revenues Revenues	121278000	USD
CY2020Q3	us-gaap	Revenues Revenues	133688000	USD
CY2020Q4	us-gaap	Revenues Revenues	124200000	USD
CY2020	us-gaap	Revenues Revenues	488243000	USD
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	25699000	USD
CY2020Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	35716000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	39807000	USD
CY2020Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	29277000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	130499000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	14072000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	25612000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	26530000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	20211000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	86425000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.38
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.69
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.72
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.55
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.34
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.38
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.69
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.72
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.54
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.33
CY2019Q1	us-gaap	Revenues Revenues	101733000	USD
CY2019Q2	us-gaap	Revenues Revenues	124647000	USD
CY2019Q3	us-gaap	Revenues Revenues	134496000	USD
CY2019Q4	us-gaap	Revenues Revenues	112993000	USD
CY2019	us-gaap	Revenues Revenues	473869000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	20195000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	39430000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	42724000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	24724000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	127073000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	12852000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	26784000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	28006000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	16700000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	84342000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.35
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.72
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.76
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.28
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.35
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.72
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.76
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.45
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.45
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.28
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36880000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36814000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	36733000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	36995000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	36964000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	36936000	shares
CY2020Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	200000000.0	USD
CY2020Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	260000000.0	USD
CY2020Q4	us-gaap	Notes Payable To Bank NotesPayableToBank	134200000	USD

Files In Submission

Name	View Source	Status
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0001056903-21-000021-index.html	Edgar Link	pending
0001056903-21-000021.txt	Edgar Link	pending
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$AWR
AMERICAN STATES WATER CO Stock $awr

2020 Q4 Form 10-K Financial Statement

#000105690321000021 Filed on February 22, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AWR AMERICAN STATES WATER CO Stock $awr

2020 Q4 Form 10-K Financial Statement

#000105690321000021 Filed on February 22, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AWR
AMERICAN STATES WATER CO Stock $awr