10-K Filing

BLACK HILLS CORP /SD/ CIK: 1130464 FY 2018

Filing Information

Form Type	10-K
Accession Number	`0001130464-19-000012`
Period End Date	20181231
Filing Date	20190219
Fiscal Year	2018
Fiscal Period	FY
XBRL Instance	bkh-20181231.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 104 Income Statement 216 Cash Flow Statement 137 Stockholders Equity 67 Comprehensive Income 47

Balance Sheet 104 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
Treasury Stock, Shares	`TreasuryStockShares`	44,253.00	shares	Point-in-time
Treasury Stock, Shares	`TreasuryStockShares`	39,064.00	shares	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$15.42M	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
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$20.78M	USD	Point-in-time
Restricted cash and equivalents	`RestrictedCashAndInvestmentsCurrent`	$3.37M	USD	Point-in-time
Common Stock, Shares, Issued	`CommonStockSharesIssued`	53.58M	shares	Point-in-time
Common Stock, Shares, Issued	`CommonStockSharesIssued`	60.05M	shares	Point-in-time
Restricted cash and equivalents	`RestrictedCashAndInvestmentsCurrent`	$2.82M	USD	Point-in-time
Accounts receivable, net	`AccountsReceivableNetCurrent`	$248.33M	USD	Point-in-time
Accounts receivable, net	`AccountsReceivableNetCurrent`	$269.15M	USD	Point-in-time
Materials, supplies and fuel	`InventoryNet`	$113.28M	USD	Point-in-time
Materials, supplies and fuel	`InventoryNet`	$117.30M	USD	Point-in-time
Derivative assets, current	`DerivativeAssetsCurrent`	$304.00K	USD	Point-in-time
Derivative assets, current	`DerivativeAssetsCurrent`	$1.50M	USD	Point-in-time
Income tax receivable, net	`IncomeTaxesReceivable`	$12.98M	USD	Point-in-time
Income tax receivable, net	`IncomeTaxesReceivable`	-	USD	Point-in-time
Regulatory assets, current	`RegulatoryAssetsCurrent`	$81.02M	USD	Point-in-time
Regulatory assets, current	`RegulatoryAssetsCurrent`	$48.78M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$29.98M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$25.37M	USD	Point-in-time
Current assets held for sale	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$84.24M	USD	Point-in-time
Current assets held for sale	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	-	USD	Point-in-time
Total current assets	`AssetsCurrent`	$570.78M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$503.83M	USD	Point-in-time
Investments	`LongTermInvestments`	$13.09M	USD	Point-in-time
Investments	`LongTermInvestments`	$41.01M	USD	Point-in-time
Property, plant and equipment	`PropertyPlantAndEquipmentGross`	$5.57B	USD	Point-in-time
Property, plant and equipment	`PropertyPlantAndEquipmentGross`	$6.00B	USD	Point-in-time
Less accumulated depreciation and depletion	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$1.03B	USD	Point-in-time
Less accumulated depreciation and depletion	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$1.15B	USD	Point-in-time
Total property, plant and equipment, net	`PropertyPlantAndEquipmentNet`	$4.85B	USD	Point-in-time
Total property, plant and equipment, net	`PropertyPlantAndEquipmentNet`	$4.54B	USD	Point-in-time
Goodwill	`Goodwill`	$1.30B	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`	$7.56M	USD	Point-in-time
Intangible assets, net	`IntangibleAssetsNetExcludingGoodwill`	$3.38M	USD	Point-in-time
Intangible assets, net	`IntangibleAssetsNetExcludingGoodwill`	$8.39M	USD	Point-in-time
Regulatory assets, non-current	`RegulatoryAssetsNoncurrent`	$235.46M	USD	Point-in-time
Regulatory assets, non-current	`RegulatoryAssetsNoncurrent`	$216.44M	USD	Point-in-time
Other assets, non-current	`OtherAssetsNoncurrent`	$10.15M	USD	Point-in-time
Other assets, non-current	`OtherAssetsNoncurrent`	$14.35M	USD	Point-in-time
Total other assets, non-current	`AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment`	$1.53B	USD	Point-in-time
Total other assets, non-current	`AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment`	$1.56B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$6.96B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$6.66B	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$160.89M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$210.61M	USD	Point-in-time
Accrued liabilities	`AccruedLiabilitiesCurrent`	$215.50M	USD	Point-in-time
Accrued liabilities	`AccruedLiabilitiesCurrent`	$219.46M	USD	Point-in-time
Derivative liabilities, current	`DerivativeLiabilitiesCurrent`	$947.00K	USD	Point-in-time
Derivative liabilities, current	`DerivativeLiabilitiesCurrent`	$2.08M	USD	Point-in-time
Accrued income tax, net	`AccruedIncomeTaxesCurrent`	-	USD	Point-in-time
Accrued income tax, net	`AccruedIncomeTaxesCurrent`	$1.02M	USD	Point-in-time
Regulatory liabilities, current	`RegulatoryLiabilityCurrent`	$29.81M	USD	Point-in-time
Regulatory liabilities, current	`RegulatoryLiabilityCurrent`	$6.83M	USD	Point-in-time
Notes payable	`ShortTermBorrowings`	$211.30M	USD	Point-in-time
Notes payable	`ShortTermBorrowings`	$185.62M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$5.74M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$5.74M	USD	Point-in-time
Current liabilities held for sale	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$41.77M	USD	Point-in-time
Current liabilities held for sale	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	-	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$649.10M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$648.23M	USD	Point-in-time
Long-term debt, net of current maturities	`LongTermDebtNoncurrent`	$3.11B	USD	Point-in-time
Long-term debt, net of current maturities	`LongTermDebtNoncurrent`	$2.95B	USD	Point-in-time
Deferred income tax liabilities, net	`DeferredTaxLiabilitiesNoncurrent`	$336.52M	USD	Point-in-time
Deferred income tax liabilities, net	`DeferredTaxLiabilitiesNoncurrent`	$311.33M	USD	Point-in-time
Regulatory liabilities, non-current	`RegulatoryLiabilityNoncurrent`	$510.98M	USD	Point-in-time
Regulatory liabilities, non-current	`RegulatoryLiabilityNoncurrent`	$478.29M	USD	Point-in-time
Benefit plan liabilities	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$159.65M	USD	Point-in-time
Benefit plan liabilities	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$145.15M	USD	Point-in-time
Other deferred credits and other liabilities	`OtherLiabilitiesNoncurrent`	$105.73M	USD	Point-in-time
Other deferred credits and other liabilities	`OtherLiabilitiesNoncurrent`	$109.38M	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesNoncurrent`	$1.08B	USD	Point-in-time
Total deferred credits and other liabilities	`LiabilitiesNoncurrent`	$1.08B	USD	Point-in-time
Commitments and contingencies (See Notes 6, 7, 8, 9, 14, 18, 19, and 20)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and contingencies (See Notes 6, 7, 8, 9, 14, 18, 19, and 20)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock $1 par value; 100,000,000 shares authorized; issued: 60,048,567 and 53,579,986, respectively	`CommonStockValue`	$60.05M	USD	Point-in-time
Common stock $1 par value; 100,000,000 shares authorized; issued: 60,048,567 and 53,579,986, respectively	`CommonStockValue`	$53.58M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapital`	$1.45B	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapital`	$1.15B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$548.62M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$700.40M	USD	Point-in-time
Treasury stock at cost - 44,253 and 39,064, respectively	`TreasuryStockValue`	$2.51M	USD	Point-in-time
Treasury stock at cost - 44,253 and 39,064, respectively	`TreasuryStockValue`	$2.31M	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-26.92M	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-34.88M	USD	Point-in-time
Accumulated other comprehensive income (loss)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-41.20M	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$1.71B	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$2.18B	USD	Point-in-time
Noncontrolling interest	`NoncontrollingInterestInVariableInterestEntity`	$111.23M	USD	Point-in-time
Noncontrolling interest	`NoncontrollingInterestInVariableInterestEntity`	$105.83M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.73B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.29B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.47B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.82B	USD	Point-in-time
TOTAL LIABILITIES AND TOTAL EQUITY	`LiabilitiesAndStockholdersEquity`	$6.66B	USD	Point-in-time
TOTAL LIABILITIES AND TOTAL EQUITY	`LiabilitiesAndStockholdersEquity`	$6.96B	USD	Point-in-time

Income Statement 216 line items

Line Item	Tag	Value	Unit	Period
Revenue	`Revenues`	$455.30M	USD	1 Quarter
Revenue	`Revenues`	$575.39M	USD	1 Quarter
Revenue	`Revenues`	$335.61M	USD	1 Quarter
Revenue	`Revenues`	$1.68B	USD	Annual
Revenue	`Revenues`	$501.20M	USD	1 Quarter
Revenue	`Revenues`	$341.83M	USD	1 Quarter
Revenue	`Revenues`	$355.70M	USD	1 Quarter
Revenue	`Revenues`	$321.98M	USD	1 Quarter
Revenue	`Revenues`	$547.53M	USD	1 Quarter
Revenue	`Revenues`	$1.75B	USD	Annual
Revenue	`Revenues`	$1.54B	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`	$563.29M	USD	Annual
Fuel, purchased power and cost of natural gas sold	`FuelPurchasedPowerAndCostOfGasSold`	$499.13M	USD	Annual
Operations and maintenance	`OperatingExpenseMaintenanceOperationsandOtherCostsandExpense`	$426.60M	USD	Annual
Operations and maintenance	`OperatingExpenseMaintenanceOperationsandOtherCostsandExpense`	$454.61M	USD	Annual
Operations and maintenance	`OperatingExpenseMaintenanceOperationsandOtherCostsandExpense`	$481.71M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$175.53M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$196.33M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$188.25M	USD	Annual
Taxes - property and production	`TaxesExcludingIncomeAndExciseTaxes`	$51.75M	USD	Annual
Taxes - property and production	`TaxesExcludingIncomeAndExciseTaxes`	$46.16M	USD	Annual
Taxes - property and production	`TaxesExcludingIncomeAndExciseTaxes`	$51.58M	USD	Annual
Other operating expenses	`OtherCostAndExpenseOperating`	$5.81M	USD	Annual
Other operating expenses	`OtherCostAndExpenseOperating`	$55.31M	USD	Annual
Other operating expenses	`OtherCostAndExpenseOperating`	$1.84M	USD	Annual
Total operating expenses	`OperatingExpenses`	$1.20B	USD	Annual
Total operating expenses	`OperatingExpenses`	$1.36B	USD	Annual
Total operating expenses	`OperatingExpenses`	$1.26B	USD	Annual
Operating income	`OperatingIncomeLoss`	$117.19M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$416.74M	USD	Annual
Operating income	`OperatingIncomeLoss`	$397.04M	USD	Annual
Operating income	`OperatingIncomeLoss`	$148.27M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$150.19M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$114.13M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$69.55M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$336.18M	USD	Annual
Operating income	`OperatingIncomeLoss`	$65.08M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$79.56M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$69.80M	USD	1 Quarter
Interest expense incurred net of amounts capitalized (including amortization of debt issuance costs, premiums and discounts)	`InterestCostsIncurred`	$140.53M	USD	Annual
Interest expense incurred net of amounts capitalized (including amortization of debt issuance costs, premiums and discounts)	`InterestCostsIncurred`	$139.09M	USD	Annual
Interest expense incurred net of amounts capitalized (including amortization of debt issuance costs, premiums and discounts)	`InterestCostsIncurred`	$143.72M	USD	Annual
Allowance for funds used during construction - borrowed	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionBorrowedInterestCostsCapitalized`	$2.42M	USD	Annual
Allowance for funds used during construction - borrowed	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionBorrowedInterestCostsCapitalized`	$2.98M	USD	Annual
Allowance for funds used during construction - borrowed	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionBorrowedInterestCostsCapitalized`	$2.10M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.02M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.64M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.43M	USD	Annual
Allowance for funds used during construction - equity	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$619.00K	USD	Annual
Allowance for funds used during construction - equity	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$2.32M	USD	Annual
Allowance for funds used during construction - equity	`PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity`	$3.27M	USD	Annual
Other income (expense), net	`OtherNonoperatingIncomeExpense`	$-213.00K	USD	Annual
Other income (expense), net	`OtherNonoperatingIncomeExpense`	$1.12M	USD	Annual
Other income (expense), net	`OtherNonoperatingIncomeExpense`	$-1.80M	USD	Annual
Total other income (expense)	`TotalOtherIncomeExpense`	$-141.16M	USD	Annual
Total other income (expense)	`TotalOtherIncomeExpense`	$-134.99M	USD	Annual
Total other income (expense)	`TotalOtherIncomeExpense`	$-130.29M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$255.88M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$205.89M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$281.74M	USD	Annual
Income tax benefit (expense)	`IncomeTaxExpenseBenefit`	$73.37M	USD	Annual
Income tax benefit (expense)	`IncomeTaxExpenseBenefit`	$-23.67M	USD	Annual
Income tax benefit (expense)	`IncomeTaxExpenseBenefit`	$59.10M	USD	Annual
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$146.79M	USD	Annual
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$208.38M	USD	Annual
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$81.72M	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$32.90M	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$25.93M	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$67.83M	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$21.80M	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$279.55M	USD	Annual
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$91.60M	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$138.98M	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$27.17M	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-2.34M	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-17.10M	USD	Annual
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-857.00K	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-616.00K	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-6.89M	USD	Annual
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-1.57M	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-2.43M	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-64.16M	USD	Annual
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-13.61M	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-1.26M	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-1.30M	USD	1 Quarter
Net income	`ProfitLoss`	$191.28M	USD	Annual
Net income	`ProfitLoss`	$272.66M	USD	Annual
Net income	`ProfitLoss`	$82.63M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$9.66M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.77M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.63M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.99M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.12M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.57M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.62M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$2.82M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.22M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.24M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.94M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$72.97M	USD	Annual
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$21.92M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$258.44M	USD	Annual
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$27.66M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$50.65M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$177.03M	USD	Annual
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$16.95M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$133.00M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$76.52M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$86.57M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$22.20M	USD	1 Quarter
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$22.81M	USD	1 Quarter
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$28.96M	USD	1 Quarter
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$194.13M	USD	Annual
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$24.34M	USD	1 Quarter
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$87.83M	USD	1 Quarter
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$135.35M	USD	1 Quarter
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$78.09M	USD	1 Quarter
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$64.27M	USD	1 Quarter
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$265.33M	USD	Annual
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$137.13M	USD	Annual
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$17.81M	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-2.34M	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-17.10M	USD	Annual
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-857.00K	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-616.00K	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-6.89M	USD	Annual
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-1.57M	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-2.43M	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-64.16M	USD	Annual
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-13.61M	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-1.26M	USD	1 Quarter
Net (loss) from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-1.30M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$72.97M	USD	Annual
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$21.92M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$258.44M	USD	Annual
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$27.66M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$50.65M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$177.03M	USD	Annual
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$16.95M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$133.00M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$76.52M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$86.57M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$22.20M	USD	1 Quarter
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$3.65	USD	Annual
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.54	USD	1 Quarter
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.46	USD	1 Quarter
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.54	USD	1 Quarter
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$1.21	USD	1 Quarter
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$1.47	USD	1 Quarter
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.64	USD	Annual
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.33	USD	1 Quarter
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.43	USD	1 Quarter
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$1.52	USD	1 Quarter
Earnings from continuing operations, Basic (usd per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$4.88	USD	Annual
(Loss) from discontinued operations per share, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-1.23	USD	Annual
(Loss) from discontinued operations per share, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.26	USD	1 Quarter
(Loss) from discontinued operations per share, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.32	USD	Annual
(Loss) from discontinued operations per share, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.13	USD	Annual
(Loss) from discontinued operations per share, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.02	USD	1 Quarter
(Loss) from discontinued operations per share, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.02	USD	1 Quarter
(Loss) from discontinued operations per share, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.02	USD	1 Quarter
(Loss) from discontinued operations per share, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.05	USD	1 Quarter
(Loss) from discontinued operations per share, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.03	USD	1 Quarter
(Loss) from discontinued operations per share, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.01	USD	1 Quarter
(Loss) from discontinued operations per share, Basic (usd per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.05	USD	1 Quarter
Total earnings (loss) per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$4.75	USD	Annual
Total earnings (loss) per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$0.32	USD	1 Quarter
Total earnings (loss) per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$1.44	USD	1 Quarter
Total earnings (loss) per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$0.95	USD	1 Quarter
Total earnings (loss) per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$0.41	USD	1 Quarter
Total earnings (loss) per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$3.33	USD	Annual
Total earnings (loss) per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$1.41	USD	Annual
Total earnings (loss) per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$0.42	USD	1 Quarter
Total earnings (loss) per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$2.49	USD	1 Quarter
Total earnings (loss) per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$1.50	USD	1 Quarter
Total earnings (loss) per share of common stock, Basic (usd per share)	`EarningsPerShareBasic`	$0.52	USD	1 Quarter
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.52	USD	1 Quarter
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.45	USD	1 Quarter
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$1.51	USD	1 Quarter
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.41	USD	1 Quarter
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.50	USD	1 Quarter
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$1.42	USD	1 Quarter
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.32	USD	1 Quarter
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$1.17	USD	1 Quarter
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$4.78	USD	Annual
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$3.52	USD	Annual
Earnings from continuing operations, Diluted (usd per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.57	USD	Annual
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.01	USD	1 Quarter
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.12	USD	Annual
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.02	USD	1 Quarter
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.05	USD	1 Quarter
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-1.20	USD	Annual
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.02	USD	1 Quarter
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.31	USD	Annual
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.02	USD	1 Quarter
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.03	USD	1 Quarter
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.25	USD	1 Quarter
(Loss) from discontinued operations, Diluted (usd per share)	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare`	$-0.04	USD	1 Quarter
Total earnings (loss) per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$3.21	USD	Annual
Total earnings (loss) per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$0.40	USD	1 Quarter
Total earnings (loss) per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$0.40	USD	1 Quarter
Total earnings (loss) per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$1.39	USD	1 Quarter
Total earnings (loss) per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$2.46	USD	1 Quarter
Total earnings (loss) per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$1.49	USD	1 Quarter
Total earnings (loss) per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$4.66	USD	Annual
Total earnings (loss) per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$0.92	USD	1 Quarter
Total earnings (loss) per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$1.37	USD	Annual
Total earnings (loss) per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$0.50	USD	1 Quarter
Total earnings (loss) per share of common stock, Diluted (usd per share)	`EarningsPerShareDiluted`	$0.31	USD	1 Quarter
Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	51.92M	shares	Annual
Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	53.22M	shares	Annual
Basic	`WeightedAverageNumberOfSharesOutstandingBasic`	54.42M	shares	Annual
Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	55.49M	shares	Annual
Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	55.12M	shares	Annual
Diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	53.27M	shares	Annual

Cash Flow Statement 137 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$191.28M	USD	Annual
Net income	`ProfitLoss`	$272.66M	USD	Annual
Net income	`ProfitLoss`	$82.63M	USD	Annual
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-2.34M	USD	1 Quarter
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-17.10M	USD	Annual
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-857.00K	USD	1 Quarter
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-616.00K	USD	1 Quarter
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-6.89M	USD	Annual
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-1.57M	USD	1 Quarter
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-2.43M	USD	1 Quarter
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-64.16M	USD	Annual
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-13.61M	USD	1 Quarter
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-1.26M	USD	1 Quarter
Loss from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-1.30M	USD	1 Quarter
Income (loss) from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$146.79M	USD	Annual
Income (loss) from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$208.38M	USD	Annual
Income (loss) from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$81.72M	USD	1 Quarter
Income (loss) from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$32.90M	USD	1 Quarter
Income (loss) from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$25.93M	USD	1 Quarter
Income (loss) from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$67.83M	USD	1 Quarter
Income (loss) from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$21.80M	USD	1 Quarter
Income (loss) from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$279.55M	USD	Annual
Income (loss) from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$91.60M	USD	1 Quarter
Income (loss) from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$138.98M	USD	1 Quarter
Income (loss) from continuing operations	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$27.17M	USD	1 Quarter
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$175.53M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$196.33M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$188.25M	USD	Annual
Deferred financing cost amortization	`AmortizationOfFinancingCostsAndDiscounts`	$6.18M	USD	Annual
Deferred financing cost amortization	`AmortizationOfFinancingCostsAndDiscounts`	$8.26M	USD	Annual
Deferred financing cost amortization	`AmortizationOfFinancingCostsAndDiscounts`	$7.84M	USD	Annual
Stock compensation	`ShareBasedCompensation`	$12.39M	USD	Annual
Stock compensation	`ShareBasedCompensation`	$10.88M	USD	Annual
Stock compensation	`ShareBasedCompensation`	$7.63M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-24.24M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$80.99M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$82.70M	USD	Annual
Employee benefit plans	`PensionAndOtherPostretirementBenefitExpense`	$14.29M	USD	Annual
Employee benefit plans	`PensionAndOtherPostretirementBenefitExpense`	$14.07M	USD	Annual
Employee benefit plans	`PensionAndOtherPostretirementBenefitExpense`	$10.14M	USD	Annual
Other adjustments, net	`OtherNoncashIncomeExpense`	$4.77M	USD	Annual
Other adjustments, net	`OtherNoncashIncomeExpense`	$-5.84M	USD	Annual
Other adjustments, net	`OtherNoncashIncomeExpense`	$5.52M	USD	Annual
Materials, supplies and fuel	`IncreaseDecreaseInInventories`	$10.09M	USD	Annual
Materials, supplies and fuel	`IncreaseDecreaseInInventories`	$2.92M	USD	Annual
Materials, supplies and fuel	`IncreaseDecreaseInInventories`	$-1.21M	USD	Annual
Accounts receivable and other current assets	`IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets`	$45.97M	USD	Annual
Accounts receivable and other current assets	`IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets`	$27.17M	USD	Annual
Accounts receivable and other current assets	`IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets`	$-4.53M	USD	Annual
Accounts payable and other current liabilities	`IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities`	$-33.02M	USD	Annual
Accounts payable and other current liabilities	`IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities`	$-28.22M	USD	Annual
Accounts payable and other current liabilities	`IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities`	$5.30M	USD	Annual
Regulatory assets	`IncreaseDecreaseInOtherRegulatoryAssets`	$15.41M	USD	Annual
Regulatory assets	`IncreaseDecreaseInOtherRegulatoryAssets`	$-3.61M	USD	Annual
Regulatory assets	`IncreaseDecreaseInOtherRegulatoryAssets`	$-33.61M	USD	Annual
Regulatory liabilities	`IncreaseDecreaseInRegulatoryLiabilities`	$-4.54M	USD	Annual
Regulatory liabilities	`IncreaseDecreaseInRegulatoryLiabilities`	$18.53M	USD	Annual
Regulatory liabilities	`IncreaseDecreaseInRegulatoryLiabilities`	$-14.08M	USD	Annual
Contributions to defined benefit pension plans	`PensionContributions`	$14.20M	USD	Annual
Contributions to defined benefit pension plans	`PensionContributions`	$27.70M	USD	Annual
Contributions to defined benefit pension plans	`PensionContributions`	$12.70M	USD	Annual
Interest rate swap settlement	`GainLossOnSaleOfDerivatives`	-	USD	Annual
Interest rate swap settlement	`GainLossOnSaleOfDerivatives`	-	USD	Annual
Interest rate swap settlement	`GainLossOnSaleOfDerivatives`	$28.82M	USD	Annual
Other operating activities, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$8.42M	USD	Annual
Other operating activities, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-6.69M	USD	Annual
Other operating activities, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$660.00K	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`	$409.03M	USD	Annual
Net cash provided by operating activities of continuing operations	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$317.74M	USD	Annual
Net cash provided by (used in) operating activities of discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$2.74M	USD	Annual
Net cash provided by (used in) operating activities of discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$19.23M	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`	$488.81M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$320.48M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$428.26M	USD	Annual
Property, plant and equipment additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$457.52M	USD	Annual
Property, plant and equipment additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$454.95M	USD	Annual
Property, plant and equipment additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$326.01M	USD	Annual
Acquisition of net assets, net of long-term debt assumed	`BusinessCombinationConsiderationTransferredNetofLongTermDebtandCashAcquired`	-	USD	Annual
Acquisition of net assets, net of long-term debt assumed	`BusinessCombinationConsiderationTransferredNetofLongTermDebtandCashAcquired`	$1.12B	USD	Annual
Acquisition of net assets, net of long-term debt assumed	`BusinessCombinationConsiderationTransferredNetofLongTermDebtandCashAcquired`	-	USD	Annual
Purchase of investment	`PaymentsToAcquireOtherInvestments`	-	USD	Annual
Purchase of investment	`PaymentsToAcquireOtherInvestments`	$24.43M	USD	Annual
Purchase of investment	`PaymentsToAcquireOtherInvestments`	-	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$4.28M	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$562.00K	USD	Annual
Other investing activities	`PaymentsForProceedsFromOtherInvestingActivities`	$-1.01M	USD	Annual
Net cash (used in) investing activities of continuing operations	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-325.00M	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`	$-1.58B	USD	Annual
Net cash provided by (used in) investing activities of discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$20.39M	USD	Annual
Net cash provided by (used in) investing activities of discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$-8.41M	USD	Annual
Net cash provided by (used in) investing activities of discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$7.88M	USD	Annual
Net cash (used in) investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-465.85M	USD	Annual
Net cash (used in) investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-1.59B	USD	Annual
Net cash (used in) investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-317.12M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividends`	$96.74M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividends`	$106.59M	USD	Annual
Dividends paid on common stock	`PaymentsOfDividends`	$87.57M	USD	Annual
Common stock issued	`ProceedsFromIssuanceOfCommonStock`	$4.41M	USD	Annual
Common stock issued	`ProceedsFromIssuanceOfCommonStock`	$121.62M	USD	Annual
Common stock issued	`ProceedsFromIssuanceOfCommonStock`	$300.83M	USD	Annual
Net increase (decrease) in commercial paper and short-term borrowings	`ProceedsFromRepaymentsOfShortTermDebt`	$114.70M	USD	Annual
Net increase (decrease) in commercial paper and short-term borrowings	`ProceedsFromRepaymentsOfShortTermDebt`	$19.80M	USD	Annual
Net increase (decrease) in commercial paper and short-term borrowings	`ProceedsFromRepaymentsOfShortTermDebt`	$-25.68M	USD	Annual
Long-term debt - issuance	`ProceedsFromIssuanceOfLongTermDebt`	$1.77B	USD	Annual
Long-term debt - issuance	`ProceedsFromIssuanceOfLongTermDebt`	$546.00M	USD	Point-in-time
Long-term debt - issuance	`ProceedsFromIssuanceOfLongTermDebt`	$700.00M	USD	Annual
Long-term debt - issuance	`ProceedsFromIssuanceOfLongTermDebt`	-	USD	Annual
Long-term debt - repayments	`RepaymentsOfLongTermDebt`	$105.74M	USD	Annual
Long-term debt - repayments	`RepaymentsOfLongTermDebt`	$854.74M	USD	Annual
Long-term debt - repayments	`RepaymentsOfLongTermDebt`	$1.16B	USD	Annual
Sale of noncontrolling interest	`ProceedsFromMinorityShareholders`	-	USD	Annual
Sale of noncontrolling interest	`ProceedsFromMinorityShareholders`	-	USD	Annual
Sale of noncontrolling interest	`ProceedsFromMinorityShareholders`	$216.00M	USD	Point-in-time
Sale of noncontrolling interest	`ProceedsFromMinorityShareholders`	$216.37M	USD	Annual
Distributions to noncontrolling interests	`PaymentsToMinorityShareholders`	$19.62M	USD	Annual
Distributions to noncontrolling interests	`PaymentsToMinorityShareholders`	$9.56M	USD	Annual
Distributions to noncontrolling interests	`PaymentsToMinorityShareholders`	$18.40M	USD	Annual
Other financing activities	`ProceedsFromPaymentsForOtherFinancingActivities`	$-11.26M	USD	Annual
Other financing activities	`ProceedsFromPaymentsForOtherFinancingActivities`	$-6.92M	USD	Annual
Other financing activities	`ProceedsFromPaymentsForOtherFinancingActivities`	$-22.96M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-17.06M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-108.69M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$841.00M	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`	$-426.69M	USD	Annual
Net change in cash, restricted cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$2.45M	USD	Annual
Cash, restricted cash and cash equivalents beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$15.79M	USD	Point-in-time
Cash, restricted cash and cash equivalents beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$442.48M	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 beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$18.24M	USD	Point-in-time
Cash, restricted cash and cash equivalents end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$15.79M	USD	Point-in-time
Cash, restricted cash and cash equivalents end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$442.48M	USD	Point-in-time
Cash, restricted cash and cash equivalents end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$24.14M	USD	Point-in-time
Cash, restricted cash and cash equivalents end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$18.24M	USD	Point-in-time

Stockholders Equity 67 line items

Line Item	Tag	Value	Unit	Period
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.73B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.29B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.47B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.82B	USD	Point-in-time
Treasury Stock, Shares	`TreasuryStockShares`	44,253.00	shares	Point-in-time
Treasury Stock, Shares	`TreasuryStockShares`	39,064.00	shares	Point-in-time
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$72.97M	USD	Annual
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$21.92M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$258.44M	USD	Annual
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$27.66M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$50.65M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$177.03M	USD	Annual
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$16.95M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$133.00M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$76.52M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$86.57M	USD	1 Quarter
Net income (loss) available for common stock	`NetIncomeLossAvailableToCommonStockholdersBasic`	$22.20M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$9.66M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.77M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.63M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.99M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.12M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.57M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.62M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$2.82M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.22M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.24M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.94M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$191.28M	USD	Annual
Net income (loss)	`ProfitLoss`	$272.66M	USD	Annual
Net income (loss)	`ProfitLoss`	$82.63M	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-25.83M	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$681.00K	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$7.03M	USD	Annual
Reclassification of certain tax effects from AOCI	`TaxCutsandJobsActof2017ReclassificationfromAOCItoRetainedEarnings`	-	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`	$87.57M	USD	Annual
Dividends on common stock	`DividendsCommonStockCash`	$96.74M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueShareBasedCompensation`	$7.57M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueShareBasedCompensation`	$7.19M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueShareBasedCompensation`	$5.48M	USD	Annual
Tax effect of share-based compensation	`AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet`	$3.72M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$299.00M	USD	Annual
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$119.99M	USD	Annual
Issuance costs	`AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts`	$1.57M	USD	Annual
Issuance costs	`AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts`	$15.00K	USD	Annual
Issuance costs	`AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts`	$189.00K	USD	Annual
Dividend reinvestment and stock purchase plan	`StockIssuedDuringPeriodValueDividendReinvestmentPlan`	$220.00K	USD	Annual
Dividend reinvestment and stock purchase plan	`StockIssuedDuringPeriodValueDividendReinvestmentPlan`	$2.98M	USD	Annual
Dividend reinvestment and stock purchase plan	`StockIssuedDuringPeriodValueDividendReinvestmentPlan`	$3.16M	USD	Annual
Other stock transactions	`StockholdersEquityOther`	$-476.00K	USD	Annual
Other stock transactions	`StockholdersEquityOther`	$-82.00K	USD	Annual
Sale of noncontrolling interest	`NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest`	$177.23M	USD	Annual
Distributions to noncontrolling interest	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$19.62M	USD	Annual
Distributions to noncontrolling interest	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$9.56M	USD	Annual
Distributions to noncontrolling interest	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$19.39M	USD	Annual
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.73B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$2.29B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.47B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.82B	USD	Point-in-time
Treasury Stock, Shares	`TreasuryStockShares`	44,253.00	shares	Point-in-time
Treasury Stock, Shares	`TreasuryStockShares`	39,064.00	shares	Point-in-time
Dividends per share paid (usd per share)	`CommonStockDividendsPerShareCashPaid`	$1.93	USD	Annual
Dividends per share paid (usd per share)	`CommonStockDividendsPerShareCashPaid`	$1.81	USD	Annual
Dividends per share paid (usd per share)	`CommonStockDividendsPerShareCashPaid`	$1.68	USD	Annual

Comprehensive Income 47 line items

Line Item	Tag	Value	Unit	Period
Net income (loss)	`ProfitLoss`	$191.28M	USD	Annual
Benefit plan liability adjustments - net gain (loss), Tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-757.00K	USD	Annual
Benefit plan liability adjustments - net gain (loss), Tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$660.00K	USD	Annual
Net income (loss)	`ProfitLoss`	$272.66M	USD	Annual
Net income (loss)	`ProfitLoss`	$82.63M	USD	Annual
Benefit plan liability adjustments - net gain (loss), Tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-1.03M	USD	Annual
Benefit plan liability adjustments - prior service (costs), Tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect`	-	USD	Annual
Benefit plan liability adjustments - prior service (costs), Tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect`	$107.00K	USD	Annual
Benefit plan liability adjustments - prior service (costs), Tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect`	-	USD	Annual
Reclassification adjustment of benefit plan liability - net gain (loss) tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-600.00K	USD	Annual
Reclassification adjustment of benefit plan liability - net gain (loss) tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-585.00K	USD	Annual
Reclassification adjustment of benefit plan liability - net gain (loss) tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-586.00K	USD	Annual
Reclassification adjustment of benefit plan liability - prior service cost, tax	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	$-67.00K	USD	Annual
Benefit plan liability adjustments - net gain (loss) (net of tax of $(660), $1,030 and $757, respectively)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$2.15M	USD	Annual
Reclassification adjustment of benefit plan liability - prior service cost, tax	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	$-43.00K	USD	Annual
Reclassification adjustment of benefit plan liability - prior service cost, tax	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax`	$-69.00K	USD	Annual
Benefit plan liability adjustments - net gain (loss) (net of tax of $(660), $1,030 and $757, respectively)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-1.74M	USD	Annual
Benefit plan liability adjustments - net gain (loss) (net of tax of $(660), $1,030 and $757, respectively)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-1.89M	USD	Annual
Benefit plan liability adjustments - prior service (costs) (net of tax of $0, $0 and $107, respectively)	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
Benefit plan liability adjustments - prior service (costs) (net of tax of $0, $0 and $107, respectively)	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	$247.00K	USD	Annual
Benefit plan liability adjustments - prior service (costs) (net of tax of $0, $0 and $107, respectively)	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
Reclassification adjustment of benefit plan liability - net gain (loss) (net of tax of $(586), $(585) and $(600), respectively)	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.07M	USD	Annual
Reclassification adjustment of benefit plan liability - net gain (loss) (net of tax of $(586), $(585) and $(600), respectively)	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.38M	USD	Annual
Reclassification adjustment of benefit plan liability - net gain (loss) (net of tax of $(586), $(585) and $(600), respectively)	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-1.90M	USD	Annual
Reclassification adjustment of benefit plan liability - prior service cost (net of tax of $43, $69 and $67, respectively)	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-135.00K	USD	Annual
Reclassification adjustment of benefit plan liability - prior service cost (net of tax of $43, $69 and $67, respectively)	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-128.00K	USD	Annual
Reclassification adjustment of benefit plan liability - prior service cost (net of tax of $43, $69 and $67, respectively)	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$-154.00K	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-25.83M	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$681.00K	USD	Annual
Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$7.03M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$279.69M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$56.80M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$191.96M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$9.66M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.77M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.63M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.99M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.12M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.57M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.62M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$2.82M	USD	1 Quarter
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.22M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$14.24M	USD	Annual
Net income attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$3.94M	USD	1 Quarter
Comprehensive income available for common stock	`ComprehensiveIncomeNetOfTax`	$47.14M	USD	Annual
Comprehensive income available for common stock	`ComprehensiveIncomeNetOfTax`	$265.47M	USD	Annual
Comprehensive income available for common stock	`ComprehensiveIncomeNetOfTax`	$177.72M	USD	Annual

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