10-K Filing

BLACK HILLS CORP /SD/ CIK: 1130464 FY 2020

Filing Information

Form Type	10-K
Accession Number	`0001130464-21-000007`
Period End Date	20201231
Filing Date	20210226
Fiscal Year	2020
Fiscal Period	FY
XBRL Instance	bkh-20201231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 103 Income Statement 95 Cash Flow Statement 127 Stockholders Equity 41 Comprehensive Income 39

Balance Sheet 103 line items

Line Item	Tag	Value	Unit	Period
Common stock, par value (usd per share)	`CommonStockParOrStatedValuePerShare`	$1.00	USD	Point-in-time
Common stock, par value (usd per share)	`CommonStockParOrStatedValuePerShare`	$1.00	USD	Point-in-time
Common stock, shares authorized	`CommonStockSharesAuthorized`	100.00M	shares	Point-in-time
Common stock, shares authorized	`CommonStockSharesAuthorized`	100.00M	shares	Point-in-time
Common stock, shares, issued	`CommonStockSharesIssued`	61.48M	shares	Point-in-time
Common stock, shares, issued	`CommonStockSharesIssued`	62.83M	shares	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$9.78M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$6.36M	USD	Point-in-time
Restricted cash and equivalents	`RestrictedCashAndInvestmentsCurrent`	$4.38M	USD	Point-in-time
Restricted cash and equivalents	`RestrictedCashAndInvestmentsCurrent`	$3.88M	USD	Point-in-time
Treasury stock, shares	`TreasuryStockShares`	3,956.00	shares	Point-in-time
Treasury stock, shares	`TreasuryStockShares`	32,492.00	shares	Point-in-time
Accounts receivable, net	`AccountsReceivableNetCurrent`	$255.81M	USD	Point-in-time
Accounts receivable, net	`AccountsReceivableNetCurrent`	$265.96M	USD	Point-in-time
Materials, supplies and fuel	`InventoryNet`	$117.40M	USD	Point-in-time
Materials, supplies and fuel	`InventoryNet`	$117.17M	USD	Point-in-time
Derivative assets, current	`DerivativeAssetsCurrent`	$1.85M	USD	Point-in-time
Derivative assets, current	`DerivativeAssetsCurrent`	$342.00K	USD	Point-in-time
Income tax receivable, net	`IncomeTaxesReceivable`	$16.45M	USD	Point-in-time
Income tax receivable, net	`IncomeTaxesReceivable`	$19.45M	USD	Point-in-time
Regulatory assets, current	`RegulatoryAssetsCurrent`	$51.68M	USD	Point-in-time
Regulatory assets, current	`RegulatoryAssetsCurrent`	$43.28M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$26.48M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$26.22M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$473.18M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$493.29M	USD	Point-in-time
Property, plant and equipment	`PropertyPlantAndEquipmentGross`	$6.78B	USD	Point-in-time
Property, plant and equipment	`PropertyPlantAndEquipmentGross`	$7.31B	USD	Point-in-time
Less accumulated depreciation and depletion	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$1.28B	USD	Point-in-time
Less accumulated depreciation and depletion	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$1.29B	USD	Point-in-time
Total property, plant and equipment, net	`PropertyPlantAndEquipmentNet`	$6.02B	USD	Point-in-time
Total property, plant and equipment, net	`PropertyPlantAndEquipmentNet`	$5.50B	USD	Point-in-time
Goodwill	`Goodwill`	$1.30B	USD	Point-in-time
Goodwill	`Goodwill`	$1.30B	USD	Point-in-time
Intangible assets, net	`IntangibleAssetsNetExcludingGoodwill`	$14.34M	USD	Point-in-time
Intangible assets, net	`IntangibleAssetsNetExcludingGoodwill`	$13.27M	USD	Point-in-time
Intangible assets, net	`IntangibleAssetsNetExcludingGoodwill`	$7.56M	USD	Point-in-time
Intangible assets, net	`IntangibleAssetsNetExcludingGoodwill`	$11.94M	USD	Point-in-time
Regulatory assets, non-current	`RegulatoryAssetsNoncurrent`	$228.06M	USD	Point-in-time
Regulatory assets, non-current	`RegulatoryAssetsNoncurrent`	$226.58M	USD	Point-in-time
Other assets, non-current	`OtherAssetsNoncurrent`	$37.80M	USD	Point-in-time
Other assets, non-current	`OtherAssetsNoncurrent`	$41.30M	USD	Point-in-time
Total other assets, non-current	`AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment`	$1.58B	USD	Point-in-time
Total other assets, non-current	`AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment`	$1.58B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$7.56B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$8.09B	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$193.52M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$183.34M	USD	Point-in-time
Accrued liabilities	`AccruedLiabilitiesCurrent`	$226.77M	USD	Point-in-time
Accrued liabilities	`AccruedLiabilitiesCurrent`	$243.61M	USD	Point-in-time
Derivative liabilities, current	`DerivativeLiabilitiesCurrent`	$2.25M	USD	Point-in-time
Derivative liabilities, current	`DerivativeLiabilitiesCurrent`	$2.04M	USD	Point-in-time
Regulatory liabilities, current	`RegulatoryLiabilityCurrent`	$25.06M	USD	Point-in-time
Regulatory liabilities, current	`RegulatoryLiabilityCurrent`	$33.51M	USD	Point-in-time
Notes payable	`ShortTermBorrowings`	$234.04M	USD	Point-in-time
Notes payable	`ShortTermBorrowings`	$349.50M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$8.44M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$5.74M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$696.53M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$811.29M	USD	Point-in-time
Long-term debt, net of current maturities	`LongTermDebtNoncurrent`	$3.14B	USD	Point-in-time
Long-term debt, net of current maturities	`LongTermDebtNoncurrent`	$3.53B	USD	Point-in-time
Deferred income tax liabilities, net	`DeferredIncomeTaxLiabilitiesNet`	$408.62M	USD	Point-in-time
Deferred income tax liabilities, net	`DeferredIncomeTaxLiabilitiesNet`	$360.72M	USD	Point-in-time
Regulatory liabilities, non-current	`RegulatoryLiabilityNoncurrent`	$507.66M	USD	Point-in-time
Regulatory liabilities, non-current	`RegulatoryLiabilityNoncurrent`	$503.14M	USD	Point-in-time
Benefit plan liabilities	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$150.56M	USD	Point-in-time
Benefit plan liabilities	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$154.47M	USD	Point-in-time
Other deferred credits and other liabilities	`OtherLiabilitiesNoncurrent`	$134.67M	USD	Point-in-time
Other deferred credits and other liabilities	`OtherLiabilitiesNoncurrent`	$124.66M	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$1.14B	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$1.20B	USD	Point-in-time
Commitments, contingencies and guarantees (Note 3)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments, contingencies and guarantees (Note 3)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock $1.00 par value; 100,000,000 shares authorized; issued: 62,827,179 and 61,480,658, respectively	`CommonStockValue`	$62.83M	USD	Point-in-time
Common stock $1.00 par value; 100,000,000 shares authorized; issued: 62,827,179 and 61,480,658, respectively	`CommonStockValue`	$61.48M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapital`	$1.66B	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapital`	$1.55B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$870.74M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$778.78M	USD	Point-in-time
Treasury stock at cost - 32,492 and 3,956, respectively	`TreasuryStockValue`	$2.12M	USD	Point-in-time
Treasury stock at cost - 32,492 and 3,956, respectively	`TreasuryStockValue`	$267.00K	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-26.92M	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-27.35M	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-30.66M	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$2.56B	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$2.36B	USD	Point-in-time
Noncontrolling interest	`NoncontrollingInterestInVariableInterestEntity`	$101.26M	USD	Point-in-time
Noncontrolling interest	`NoncontrollingInterestInVariableInterestEntity`	$101.95M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.46B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.82B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.66B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.29B	USD	Point-in-time
TOTAL LIABILITIES AND TOTAL EQUITY	`LiabilitiesAndStockholdersEquity`	$8.09B	USD	Point-in-time
TOTAL LIABILITIES AND TOTAL EQUITY	`LiabilitiesAndStockholdersEquity`	$7.56B	USD	Point-in-time
Common stock, par value (usd per share)	`CommonStockParOrStatedValuePerShare`	$1.00	USD	Point-in-time
Common stock, par value (usd per share)	`CommonStockParOrStatedValuePerShare`	$1.00	USD	Point-in-time
Common stock, shares authorized	`CommonStockSharesAuthorized`	100.00M	shares	Point-in-time
Common stock, shares authorized	`CommonStockSharesAuthorized`	100.00M	shares	Point-in-time
Common stock, shares, issued	`CommonStockSharesIssued`	61.48M	shares	Point-in-time
Common stock, shares, issued	`CommonStockSharesIssued`	62.83M	shares	Point-in-time
Treasury stock, shares	`TreasuryStockShares`	3,956.00	shares	Point-in-time
Treasury stock, shares	`TreasuryStockShares`	32,492.00	shares	Point-in-time

Income Statement 95 line items

Line Item	Tag	Value	Unit	Period
Revenue	`Revenues`	$1.75B	USD	Annual
Revenue	`Revenues`	$1.70B	USD	Annual
Revenue	`Revenues`	$1.73B	USD	Annual
Fuel, purchased power and cost of natural gas sold	`FuelPurchasedPowerAndCostOfGasSold`	$625.61M	USD	Annual
Fuel, purchased power and cost of natural gas sold	`FuelPurchasedPowerAndCostOfGasSold`	$570.83M	USD	Annual
Fuel, purchased power and cost of natural gas sold	`FuelPurchasedPowerAndCostOfGasSold`	$492.40M	USD	Annual
Operations and maintenance	`OperatingExpenseMaintenanceOperationsandOtherCostsandExpense`	$495.99M	USD	Annual
Operations and maintenance	`OperatingExpenseMaintenanceOperationsandOtherCostsandExpense`	$495.40M	USD	Annual
Operations and maintenance	`OperatingExpenseMaintenanceOperationsandOtherCostsandExpense`	$481.71M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$196.33M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$224.46M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$209.12M	USD	Annual
Taxes - property and production	`TaxesExcludingIncomeAndExciseTaxes`	$52.91M	USD	Annual
Taxes - property and production	`TaxesExcludingIncomeAndExciseTaxes`	$56.37M	USD	Annual
Taxes - property and production	`TaxesExcludingIncomeAndExciseTaxes`	$51.75M	USD	Annual
Other operating expenses	`BusinessCombinationAcquisitionRelatedCosts`	-	USD	Annual
Other operating expenses	`BusinessCombinationAcquisitionRelatedCosts`	$1.84M	USD	Annual
Other operating expenses	`BusinessCombinationAcquisitionRelatedCosts`	-	USD	Annual
Total operating expenses	`OperatingExpenses`	$1.27B	USD	Annual
Total operating expenses	`OperatingExpenses`	$1.33B	USD	Annual
Total operating expenses	`OperatingExpenses`	$1.36B	USD	Annual
Operating income	`OperatingIncomeLoss`	$428.30M	USD	Annual
Operating income	`OperatingIncomeLoss`	$406.04M	USD	Annual
Operating income	`OperatingIncomeLoss`	$397.04M	USD	Annual
Interest expense incurred net of amounts capitalized (including amortization of debt issuance costs, premiums and discounts)	`InterestCostsIncurred`	$139.29M	USD	Annual
Interest expense incurred net of amounts capitalized (including amortization of debt issuance costs, premiums and discounts)	`InterestCostsIncurred`	$141.62M	USD	Annual
Interest expense incurred net of amounts capitalized (including amortization of debt issuance costs, premiums and discounts)	`InterestCostsIncurred`	$144.93M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.46M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.63M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.64M	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	-	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	$20.00M	USD	1 Quarter
Impairment of investment	`OtherAssetImpairmentCharges`	$6.86M	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	$6.90M	USD	1 Quarter
Impairment of investment	`OtherAssetImpairmentCharges`	$19.74M	USD	Annual
Other income (expense), net	`OtherNonoperatingIncomeExpense`	$-1.18M	USD	Annual
Other income (expense), net	`OtherNonoperatingIncomeExpense`	$-2.29M	USD	Annual
Other income (expense), net	`OtherNonoperatingIncomeExpense`	$-5.74M	USD	Annual
Total other income (expense)	`NonoperatingIncomeExpense`	$-163.14M	USD	Annual
Total other income (expense)	`NonoperatingIncomeExpense`	$-152.62M	USD	Annual
Total other income (expense)	`NonoperatingIncomeExpense`	$-141.16M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$242.90M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$255.88M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$275.68M	USD	Annual
Income tax benefit (expense)	`IncomeTaxExpenseBenefit`	$-23.67M	USD	Annual
Income tax benefit (expense)	`IncomeTaxExpenseBenefit`	$29.58M	USD	Annual
Income tax benefit (expense)	`IncomeTaxExpenseBenefit`	$32.92M	USD	Annual
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$242.76M	USD	Annual
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$213.32M	USD	Annual
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$279.55M	USD	Annual
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	-	USD	Annual
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-6.89M	USD	Annual
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	-	USD	Annual
Net income	`ProfitLoss`	$242.76M	USD	Annual
Net income	`ProfitLoss`	$213.32M	USD	Annual
Net income	`ProfitLoss`	$272.66M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.01M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$15.15M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.22M	USD	Annual
Net income available for common stock	`NetIncomeLoss`	$227.61M	USD	Annual
Net income available for common stock	`NetIncomeLoss`	$199.31M	USD	Annual
Net income available for common stock	`NetIncomeLoss`	$258.44M	USD	Annual
Net income from continuing operations	`NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic`	$265.33M	USD	Annual
Net income from continuing operations	`NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic`	$199.31M	USD	Annual
Net income from continuing operations	`NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic`	$227.61M	USD	Annual
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	-	USD	Annual
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-6.89M	USD	Annual
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	-	USD	Annual
Net income available for common stock	`NetIncomeLoss`	$227.61M	USD	Annual
Net income available for common stock	`NetIncomeLoss`	$199.31M	USD	Annual
Net income available for common stock	`NetIncomeLoss`	$258.44M	USD	Annual
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$3.29	USD	Annual
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$4.88	USD	Annual
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$3.65	USD	Annual
(Loss) from discontinued operations, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.13	USD	Annual
(Loss) from discontinued operations, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	-	USD	Annual
(Loss) from discontinued operations, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	-	USD	Annual
Total earnings per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$3.65	USD	Annual
Total earnings per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$4.75	USD	Annual
Total earnings per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$3.29	USD	Annual
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$3.28	USD	Annual
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$3.65	USD	Annual
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$4.78	USD	Annual
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	-	USD	Annual
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.12	USD	Annual
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	-	USD	Annual
Total earnings per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$3.65	USD	Annual
Total earnings per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$4.66	USD	Annual
Total earnings per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$3.28	USD	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	60.66M	shares	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	54.42M	shares	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	62.38M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	62.44M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	60.80M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	55.49M	shares	Annual

Cash Flow Statement 127 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$242.76M	USD	Annual
Net income	`ProfitLoss`	$213.32M	USD	Annual
Net income	`ProfitLoss`	$272.66M	USD	Annual
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	-	USD	Annual
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-6.89M	USD	Annual
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	-	USD	Annual
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$242.76M	USD	Annual
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$213.32M	USD	Annual
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$279.55M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$196.33M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$224.46M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$209.12M	USD	Annual
Deferred financing cost amortization	`AmortizationOfFinancingCostsAndDiscounts`	$7.84M	USD	Annual
Deferred financing cost amortization	`AmortizationOfFinancingCostsAndDiscounts`	$7.84M	USD	Annual
Deferred financing cost amortization	`AmortizationOfFinancingCostsAndDiscounts`	$7.88M	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	-	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	$20.00M	USD	1 Quarter
Impairment of investment	`OtherAssetImpairmentCharges`	$6.86M	USD	Annual
Impairment of investment	`OtherAssetImpairmentCharges`	$6.90M	USD	1 Quarter
Impairment of investment	`OtherAssetImpairmentCharges`	$19.74M	USD	Annual
Stock compensation	`ShareBasedCompensation`	$12.10M	USD	Annual
Stock compensation	`ShareBasedCompensation`	$5.37M	USD	Annual
Stock compensation	`ShareBasedCompensation`	$12.39M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-24.24M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$38.09M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$38.02M	USD	Annual
Employee benefit plans	`PensionAndOtherPostretirementBenefitExpense`	$14.07M	USD	Annual
Employee benefit plans	`PensionAndOtherPostretirementBenefitExpense`	$12.41M	USD	Annual
Employee benefit plans	`PensionAndOtherPostretirementBenefitExpense`	$12.00M	USD	Annual
Other adjustments, net	`OtherNoncashIncomeExpense`	$-5.84M	USD	Annual
Other adjustments, net	`OtherNoncashIncomeExpense`	$-11.67M	USD	Annual
Other adjustments, net	`OtherNoncashIncomeExpense`	$-16.48M	USD	Annual
Materials, supplies and fuel	`IncreaseDecreaseInInventories`	$2.92M	USD	Annual
Materials, supplies and fuel	`IncreaseDecreaseInInventories`	$-2.75M	USD	Annual
Materials, supplies and fuel	`IncreaseDecreaseInInventories`	$-2.05M	USD	Annual
Accounts receivable and other current assets	`IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets`	$10.84M	USD	Annual
Accounts receivable and other current assets	`IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets`	$45.97M	USD	Annual
Accounts receivable and other current assets	`IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets`	$-7.58M	USD	Annual
Accounts payable and other current liabilities	`IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities`	$-34.91M	USD	Annual
Accounts payable and other current liabilities	`IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities`	$24.66M	USD	Annual
Accounts payable and other current liabilities	`IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities`	$5.30M	USD	Annual
Regulatory assets - current	`IncreaseDecreaseInOtherRegulatoryAssets`	$-23.62M	USD	Annual
Regulatory assets - current	`IncreaseDecreaseInOtherRegulatoryAssets`	$5.05M	USD	Annual
Regulatory assets - current	`IncreaseDecreaseInOtherRegulatoryAssets`	$-33.61M	USD	Annual
Regulatory liabilities - current	`IncreaseDecreaseInRegulatoryLiabilities`	$-15.16M	USD	Annual
Regulatory liabilities - current	`IncreaseDecreaseInRegulatoryLiabilities`	$-10.71M	USD	Annual
Regulatory liabilities - current	`IncreaseDecreaseInRegulatoryLiabilities`	$18.53M	USD	Annual
Contributions to defined benefit pension plans	`PensionContributions`	$12.70M	USD	Annual
Contributions to defined benefit pension plans	`PensionContributions`	$12.70M	USD	Annual
Contributions to defined benefit pension plans	`PensionContributions`	$12.70M	USD	Annual
Other operating activities, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-6.00M	USD	Annual
Other operating activities, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-6.69M	USD	Annual
Other operating activities, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-4.65M	USD	Annual
Net cash provided by operating activities of continuing operations	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$505.51M	USD	Annual
Net cash provided by operating activities of continuing operations	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$494.33M	USD	Annual
Net cash provided by operating activities of continuing operations	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$541.86M	USD	Annual
Net cash provided by (used in) operating activities of discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	-	USD	Annual
Net cash provided by (used in) operating activities of discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	-	USD	Annual
Net cash provided by (used in) operating activities of discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$-5.52M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$541.86M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$505.51M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$488.81M	USD	Annual
Property, plant and equipment additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$767.40M	USD	Annual
Property, plant and equipment additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$457.52M	USD	Annual
Property, plant and equipment additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$818.38M	USD	Annual
Purchase of investment	`PaymentsToAcquireOtherInvestments`	-	USD	Annual
Purchase of investment	`PaymentsToAcquireOtherInvestments`	-	USD	Annual
Purchase of investment	`PaymentsToAcquireOtherInvestments`	$24.43M	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$-5.74M	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$4.28M	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$-2.17M	USD	Annual
Net cash (used in) investing activities of continuing operations	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-761.66M	USD	Annual
Net cash (used in) investing activities of continuing operations	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-486.23M	USD	Annual
Net cash (used in) investing activities of continuing operations	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-816.21M	USD	Annual
Net cash provided by investing activities of discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	-	USD	Annual
Net cash provided by investing activities of discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$20.39M	USD	Annual
Net cash provided by investing activities of discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	-	USD	Annual
Net cash (used in) investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-816.21M	USD	Annual
Net cash (used in) investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-465.85M	USD	Annual
Net cash (used in) investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-761.66M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividends`	$106.59M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividends`	$135.44M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividends`	$124.65M	USD	Annual
Common stock issued	`ProceedsFromIssuanceOfCommonStock`	$99.28M	USD	Annual
Common stock issued	`ProceedsFromIssuanceOfCommonStock`	$300.83M	USD	Annual
Common stock issued	`ProceedsFromIssuanceOfCommonStock`	$101.36M	USD	Annual
Net (payments) borrowings of short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	$163.88M	USD	Annual
Net (payments) borrowings of short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	$-115.46M	USD	Annual
Net (payments) borrowings of short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	$-25.68M	USD	Annual
Long-term debt - issuance	`ProceedsFromIssuanceOfLongTermDebt`	$400.00M	USD	Annual
Long-term debt - issuance	`ProceedsFromIssuanceOfLongTermDebt`	$1.10B	USD	Annual
Long-term debt - issuance	`ProceedsFromIssuanceOfLongTermDebt`	$700.00M	USD	Annual
Long-term debt - repayments	`RepaymentsOfLongTermDebt`	$8.60M	USD	Annual
Long-term debt - repayments	`RepaymentsOfLongTermDebt`	$854.74M	USD	Annual
Long-term debt - repayments	`RepaymentsOfLongTermDebt`	$905.74M	USD	Annual
Distributions to noncontrolling interests	`PaymentsToMinorityShareholders`	$17.90M	USD	Annual
Distributions to noncontrolling interests	`PaymentsToMinorityShareholders`	$19.62M	USD	Annual
Distributions to noncontrolling interests	`PaymentsToMinorityShareholders`	$15.84M	USD	Annual
Other financing activities	`ProceedsFromPaymentsForOtherFinancingActivities`	$-11.26M	USD	Annual
Other financing activities	`ProceedsFromPaymentsForOtherFinancingActivities`	$-7.06M	USD	Annual
Other financing activities	`ProceedsFromPaymentsForOtherFinancingActivities`	$-16.74M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-17.06M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$216.88M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$300.21M	USD	Annual
Net change in cash, restricted cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$5.91M	USD	Annual
Net change in cash, restricted cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$-10.49M	USD	Annual
Net change in cash, restricted cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$-2.92M	USD	Annual
Cash, restricted cash and cash equivalents beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$13.66M	USD	Point-in-time
Cash, restricted cash and cash equivalents beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$18.24M	USD	Point-in-time
Cash, restricted cash and cash equivalents beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$10.74M	USD	Point-in-time
Cash, restricted cash and cash equivalents beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$24.14M	USD	Point-in-time
Cash, restricted cash and cash equivalents end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$13.66M	USD	Point-in-time
Cash, restricted cash and cash equivalents end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$18.24M	USD	Point-in-time
Cash, restricted cash and cash equivalents end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$10.74M	USD	Point-in-time
Cash, restricted cash and cash equivalents end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$24.14M	USD	Point-in-time
Interest (net of amounts capitalized)	`InterestPaidNet`	$136.55M	USD	Annual
Interest (net of amounts capitalized)	`InterestPaidNet`	$131.77M	USD	Annual
Interest (net of amounts capitalized)	`InterestPaidNet`	$137.97M	USD	Annual
Income taxes	`IncomeTaxesPaidNet`	$-2.17M	USD	Annual
Income taxes	`IncomeTaxesPaidNet`	$-4.68M	USD	Annual
Income taxes	`IncomeTaxesPaidNet`	$14.73M	USD	Annual
Accrued property, plant and equipment purchases at December 31	`CapitalExpendituresIncurredButNotYetPaid`	$91.49M	USD	Annual
Accrued property, plant and equipment purchases at December 31	`CapitalExpendituresIncurredButNotYetPaid`	$72.22M	USD	Annual
Accrued property, plant and equipment purchases at December 31	`CapitalExpendituresIncurredButNotYetPaid`	$69.02M	USD	Annual
Increase in capitalized assets associated with asset retirement obligations	`NonCashRevisionToCapitalizedAssetRetirementCosts`	$5.04M	USD	Annual
Increase in capitalized assets associated with asset retirement obligations	`NonCashRevisionToCapitalizedAssetRetirementCosts`	$2.62M	USD	Annual
Increase in capitalized assets associated with asset retirement obligations	`NonCashRevisionToCapitalizedAssetRetirementCosts`	$4.77M	USD	Annual

Stockholders Equity 41 line items

Line Item	Tag	Value	Unit	Period
Dividends on common stock, Per Share	`CommonStockDividendsPerShareCashPaid`	$1.93	USD	Annual
Dividends on common stock, Per Share	`CommonStockDividendsPerShareCashPaid`	$2.17	USD	Annual
Dividends on common stock, Per Share	`CommonStockDividendsPerShareCashPaid`	$2.05	USD	Annual
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.46B	USD	Point-in-time
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.82B	USD	Point-in-time
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.66B	USD	Point-in-time
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.29B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.46B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.82B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.66B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.29B	USD	Point-in-time
Net income available for common stock	`ProfitLoss`	$242.76M	USD	Annual
Net income available for common stock	`ProfitLoss`	$213.32M	USD	Annual
Net income available for common stock	`ProfitLoss`	$272.66M	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-3.74M	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$7.03M	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$3.31M	USD	Annual
Reclassification of certain tax effects from AOCI	`TaxCutsandJobsActof2017ReclassificationfromAOCItoRetainedEarnings`	$740.00K	USD	Annual
Reclassification to regulatory asset	`ReclassificationfromLegalEntityRestructuring`	$6.52M	USD	Annual
Dividends on common stock	`DividendsCommonStockCash`	$106.59M	USD	Annual
Dividends on common stock	`DividendsCommonStockCash`	$124.65M	USD	Annual
Dividends on common stock	`DividendsCommonStockCash`	$135.44M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueShareBasedCompensation`	$5.19M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueShareBasedCompensation`	$7.19M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueShareBasedCompensation`	$7.08M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$100.00M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$100.00M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$299.00M	USD	Annual
Issuance costs	`AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts`	$1.20M	USD	Annual
Issuance costs	`AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts`	$1.18M	USD	Annual
Issuance costs	`AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts`	$15.00K	USD	Annual
Dividend reinvestment and stock purchase plan	`StockIssuedDuringPeriodValueDividendReinvestmentPlan`	$220.00K	USD	Annual
Other stock transactions	`StockholdersEquityOther`	$-82.00K	USD	Annual
Other stock transactions	`StockholdersEquityOther`	$-327.00K	USD	Annual
Distributions to noncontrolling interest	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$17.90M	USD	Annual
Distributions to noncontrolling interest	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$15.84M	USD	Annual
Distributions to noncontrolling interest	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$19.62M	USD	Annual
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.46B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.82B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.66B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.29B	USD	Point-in-time

Comprehensive Income 39 line items

Line Item	Tag	Value	Unit	Period
(Tax) benefit on benefit plan liability adjustments - net gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-1.89M	USD	Annual
(Tax) benefit on benefit plan liability adjustments - net gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-191.00K	USD	Annual
Net income	`ProfitLoss`	$242.76M	USD	Annual
Net income	`ProfitLoss`	$213.32M	USD	Annual
(Tax) benefit on benefit plan liability adjustments - net gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$660.00K	USD	Annual
Net income	`ProfitLoss`	$272.66M	USD	Annual
(Tax) benefit on benefit plan liability adjustments - prior service costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect`	$2.00K	USD	Annual
(Tax) benefit on benefit plan liability adjustments - prior service costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect`	-	USD	Annual
(Tax) benefit on benefit plan liability adjustments - prior service costs	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect`	-	USD	Annual
Benefit plan liability adjustments - net gain (loss) (net of tax of $191, $1,886 and $(660), respectively)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-6.25M	USD	Annual
(Tax) benefit on reclassification adjustment of benefit plan liability - net loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$-434.00K	USD	Annual
Benefit plan liability adjustments - net gain (loss) (net of tax of $191, $1,886 and $(660), respectively)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-1.06M	USD	Annual
(Tax) benefit on reclassification adjustment of benefit plan liability - net loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$586.00K	USD	Annual
(Tax) benefit on reclassification adjustment of benefit plan liability - net loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$958.00K	USD	Annual
Benefit plan liability adjustments - net gain (loss) (net of tax of $191, $1,886 and $(660), respectively)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$2.15M	USD	Annual
(Tax) benefit on reclassification adjustment of benefit plan liability - prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	$-19.00K	USD	Annual
(Tax) benefit on reclassification adjustment of benefit plan liability - prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	$-43.00K	USD	Annual
Benefit plan liability adjustments - prior service costs (net of tax of $0, $2 and $0 respectively)	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
Benefit plan liability adjustments - prior service costs (net of tax of $0, $2 and $0 respectively)	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
(Tax) benefit on reclassification adjustment of benefit plan liability - prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	$-23.00K	USD	Annual
Benefit plan liability adjustments - prior service costs (net of tax of $0, $2 and $0 respectively)	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	$8.00K	USD	Annual
Reclassification adjustment of benefit plan liability - net loss (net of tax of $(958), $434 and $(586), respectively)	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.90M	USD	Annual
Reclassification adjustment of benefit plan liability - net loss (net of tax of $(958), $434 and $(586), respectively)	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.43M	USD	Annual
Reclassification adjustment of benefit plan liability - net loss (net of tax of $(958), $434 and $(586), respectively)	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.18M	USD	Annual
Reclassification adjustment of benefit plan liability - prior service cost (net of tax of $23, $19 and $43, respectively)	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-135.00K	USD	Annual
Reclassification adjustment of benefit plan liability - prior service cost (net of tax of $23, $19 and $43, respectively)	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-80.00K	USD	Annual
Reclassification adjustment of benefit plan liability - prior service cost (net of tax of $23, $19 and $43, respectively)	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-58.00K	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-3.74M	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$7.03M	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$3.31M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$246.07M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$279.69M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$209.58M	USD	Annual
Less: comprehensive income attributable to non-controlling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.01M	USD	Annual
Less: comprehensive income attributable to non-controlling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$15.15M	USD	Annual
Less: comprehensive income attributable to non-controlling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.22M	USD	Annual
Comprehensive income available for common stock	`ComprehensiveIncomeNetOfTax`	$195.57M	USD	Annual
Comprehensive income available for common stock	`ComprehensiveIncomeNetOfTax`	$265.47M	USD	Annual
Comprehensive income available for common stock	`ComprehensiveIncomeNetOfTax`	$230.92M	USD	Annual

Data is extracted from SEC EDGAR XBRL filings. Values shown are as reported in the filing.