10-Q Filing

MDU RESOURCES GROUP INC CIK: 67716 Q2 2022

Filing Information

Form Type	10-Q
Accession Number	`0000067716-22-000052`
Period End Date	20220630
Filing Date	20220805
Fiscal Year	2022
Fiscal Period	Q2
XBRL Instance	mdu-20220630_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 143 Income Statement 94 Cash Flow Statement 94 Stockholders Equity 48 Comprehensive Income 64

Balance Sheet 143 line items

Line Item	Tag	Value	Unit	Period
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$59.55M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$54.16M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$57.95M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$65.39M	USD	Point-in-time
Receivables, net	`ReceivablesNetCurrent`	$903.83M	USD	Point-in-time
Receivables, net	`ReceivablesNetCurrent`	$946.74M	USD	Point-in-time
Receivables, net	`ReceivablesNetCurrent`	$1.18B	USD	Point-in-time
Inventories	`InventoryNet`	$316.33M	USD	Point-in-time
Inventories	`InventoryNet`	$335.61M	USD	Point-in-time
Inventories	`InventoryNet`	$401.43M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$118.69M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$109.58M	USD	Point-in-time
Current regulatory assets	`RegulatoryAssetsCurrent`	$102.53M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$105.75M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$74.26M	USD	Point-in-time
Prepayments and other current assets	`OtherAssetsCurrent`	$95.74M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$1.86B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$1.46B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$1.55B	USD	Point-in-time
Property, plant and equipment	`PropertyPlantAndEquipmentGross`	$8.97B	USD	Point-in-time
Property, plant and equipment	`PropertyPlantAndEquipmentGross`	$9.10B	USD	Point-in-time
Property, plant and equipment	`PropertyPlantAndEquipmentGross`	$8.42B	USD	Point-in-time
Less accumulated depreciation, depletion and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$3.21B	USD	Point-in-time
Less accumulated depreciation, depletion and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$3.13B	USD	Point-in-time
Less accumulated depreciation, depletion and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$3.22B	USD	Point-in-time
Net property, plant and equipment	`PropertyPlantAndEquipmentNet`	$5.76B	USD	Point-in-time
Net property, plant and equipment	`PropertyPlantAndEquipmentNet`	$5.89B	USD	Point-in-time
Net property, plant and equipment	`PropertyPlantAndEquipmentNet`	$5.29B	USD	Point-in-time
Goodwill	`Goodwill`	$714.96M	USD	Point-in-time
Goodwill	`Goodwill`	$717.86M	USD	Point-in-time
Goodwill	`Goodwill`	$765.39M	USD	Point-in-time
Goodwill	`Goodwill`	$763.26M	USD	Point-in-time
Other intangible assets, net	`IntangibleAssetsNetExcludingGoodwill`	$23.40M	USD	Point-in-time
Other intangible assets, net	`IntangibleAssetsNetExcludingGoodwill`	$20.04M	USD	Point-in-time
Other intangible assets, net	`IntangibleAssetsNetExcludingGoodwill`	$22.58M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$357.85M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$376.91M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$347.06M	USD	Point-in-time
Investments	`LongTermInvestments`	$173.16M	USD	Point-in-time
Investments	`LongTermInvestments`	$175.48M	USD	Point-in-time
Investments	`LongTermInvestments`	$161.25M	USD	Point-in-time
Operating lease right-of-use assets	`OperatingLeaseRightOfUseAsset`	$124.14M	USD	Point-in-time
Operating lease right-of-use assets	`OperatingLeaseRightOfUseAsset`	$115.80M	USD	Point-in-time
Operating lease right-of-use assets	`OperatingLeaseRightOfUseAsset`	$112.44M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$173.67M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$144.65M	USD	Point-in-time
Other	`OtherAssetsNoncurrent`	$157.68M	USD	Point-in-time
Total noncurrent assets	`AssetsNoncurrent`	$6.84B	USD	Point-in-time
Total noncurrent assets	`AssetsNoncurrent`	$7.36B	USD	Point-in-time
Total noncurrent assets	`AssetsNoncurrent`	$7.47B	USD	Point-in-time
Total assets	`Assets`	$9.33B	USD	Point-in-time
Total assets	`Assets`	$8.91B	USD	Point-in-time
Total assets	`Assets`	$8.30B	USD	Point-in-time
Short-term borrowings	`ShortTermBorrowings`	$100.00M	USD	Point-in-time
Short-term borrowings	`ShortTermBorrowings`	-	USD	Point-in-time
Short-term borrowings	`ShortTermBorrowings`	$50.00M	USD	Point-in-time
Long-term debt due within one year	`LongTermDebtCurrent`	$214.45M	USD	Point-in-time
Long-term debt due within one year	`LongTermDebtCurrent`	$148.05M	USD	Point-in-time
Long-term debt due within one year	`LongTermDebtCurrent`	$1.55M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$579.06M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$478.93M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$431.88M	USD	Point-in-time
Taxes payable	`TaxesPayableCurrent`	$80.37M	USD	Point-in-time
Taxes payable	`TaxesPayableCurrent`	$84.97M	USD	Point-in-time
Taxes payable	`TaxesPayableCurrent`	$78.81M	USD	Point-in-time
Dividends payable	`DividendsPayableCurrent`	$42.79M	USD	Point-in-time
Dividends payable	`DividendsPayableCurrent`	$44.23M	USD	Point-in-time
Dividends payable	`DividendsPayableCurrent`	$44.23M	USD	Point-in-time
Accrued compensation	`EmployeeRelatedLiabilitiesCurrent`	$81.90M	USD	Point-in-time
Accrued compensation	`EmployeeRelatedLiabilitiesCurrent`	$95.91M	USD	Point-in-time
Accrued compensation	`EmployeeRelatedLiabilitiesCurrent`	$98.16M	USD	Point-in-time
Operating lease liabilities due within one year	`OperatingLeaseLiabilityCurrent`	$31.79M	USD	Point-in-time
Operating lease liabilities due within one year	`OperatingLeaseLiabilityCurrent`	$33.63M	USD	Point-in-time
Operating lease liabilities due within one year	`OperatingLeaseLiabilityCurrent`	$35.37M	USD	Point-in-time
Regulatory liabilities due within one year	`RegulatoryLiabilityCurrent`	$16.30M	USD	Point-in-time
Regulatory liabilities due within one year	`RegulatoryLiabilityCurrent`	$17.88M	USD	Point-in-time
Regulatory liabilities due within one year	`RegulatoryLiabilityCurrent`	$23.45M	USD	Point-in-time
Other accrued liabilities	`OtherLiabilitiesCurrent`	$188.19M	USD	Point-in-time
Other accrued liabilities	`OtherLiabilitiesCurrent`	$207.08M	USD	Point-in-time
Other accrued liabilities	`OtherLiabilitiesCurrent`	$208.29M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$944.36M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$1.38B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$1.09B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$2.34B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$2.59B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$2.71B	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$591.96M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$597.73M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$538.63M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$468.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$458.06M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$450.62M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$428.47M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$433.02M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$428.79M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityNoncurrent`	$82.89M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityNoncurrent`	$81.05M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityNoncurrent`	$89.25M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$273.41M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$266.49M	USD	Point-in-time
Other	`OtherLiabilitiesNoncurrent`	$320.78M	USD	Point-in-time
Total noncurrent liabilities	`LiabilitiesNoncurrent`	$4.16B	USD	Point-in-time
Total noncurrent liabilities	`LiabilitiesNoncurrent`	$4.56B	USD	Point-in-time
Total noncurrent liabilities	`LiabilitiesNoncurrent`	$4.44B	USD	Point-in-time
Commitments and contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and contingencies	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock	`CommonStockValue`	$202.82M	USD	Point-in-time
Common stock	`CommonStockValue`	$203.89M	USD	Point-in-time
Common stock	`CommonStockValue`	$203.89M	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$1.42B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$1.45B	USD	Point-in-time
Other paid-in capital	`AdditionalPaidInCapitalCommonStock`	$1.46B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$1.78B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$1.76B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$1.62B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-46.97M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-43.53M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-41.00M	USD	Point-in-time
Treasury stock at cost - 538,921 shares	`TreasuryStockCommonValue`	$3.63M	USD	Point-in-time
Treasury stock at cost - 538,921 shares	`TreasuryStockCommonValue`	$3.63M	USD	Point-in-time
Treasury stock at cost - 538,921 shares	`TreasuryStockCommonValue`	$3.63M	USD	Point-in-time
Total stockholders' equity	`StockholdersEquity`	$3.39B	USD	Point-in-time
Total stockholders' equity	`StockholdersEquity`	$3.38B	USD	Point-in-time
Total stockholders' equity	`StockholdersEquity`	$3.20B	USD	Point-in-time
Total stockholders' equity	`StockholdersEquity`	$3.08B	USD	Point-in-time
Total stockholders' equity	`StockholdersEquity`	$3.36B	USD	Point-in-time
Total stockholders' equity	`StockholdersEquity`	$3.10B	USD	Point-in-time
Total liabilities and stockholders' equity	`LiabilitiesAndStockholdersEquity`	$8.30B	USD	Point-in-time
Total liabilities and stockholders' equity	`LiabilitiesAndStockholdersEquity`	$8.91B	USD	Point-in-time
Total liabilities and stockholders' equity	`LiabilitiesAndStockholdersEquity`	$9.33B	USD	Point-in-time
Common Stock, Shares Authorized	`CommonStockSharesAuthorized`	500.00M	shares	Point-in-time
Common Stock, Shares Authorized	`CommonStockSharesAuthorized`	500.00M	shares	Point-in-time
Common Stock, Shares Authorized	`CommonStockSharesAuthorized`	500.00M	shares	Point-in-time
Common Stock, Par or Stated Value Per Share	`CommonStockParOrStatedValuePerShare`	$1.00	USD	Point-in-time
Common Stock, Par or Stated Value Per Share	`CommonStockParOrStatedValuePerShare`	$1.00	USD	Point-in-time
Common Stock, Par or Stated Value Per Share	`CommonStockParOrStatedValuePerShare`	$1.00	USD	Point-in-time
Common Stock, Shares, Issued	`CommonStockSharesIssued`	203.89M	shares	Point-in-time
Common Stock, Shares, Issued	`CommonStockSharesIssued`	202.82M	shares	Point-in-time
Common Stock, Shares, Issued	`CommonStockSharesIssued`	203.89M	shares	Point-in-time
Treasury Stock, Common, Shares	`TreasuryStockCommonShares`	538,921.00	shares	Point-in-time
Treasury Stock, Common, Shares	`TreasuryStockCommonShares`	538,921.00	shares	Point-in-time
Treasury Stock, Common, Shares	`TreasuryStockCommonShares`	538,921.00	shares	Point-in-time

Income Statement 94 line items

Line Item	Tag	Value	Unit	Period
Operating revenues:	`Revenues`	$2.65B	USD	2 Qtrs
Operating revenues:	`Revenues`	$1.42B	USD	1 Quarter
Operating revenues:	`Revenues`	$3.14B	USD	2 Qtrs
Operating revenues:	`Revenues`	$1.72B	USD	1 Quarter
Operation and maintenance:	`SellingGeneralAndAdministrativeExpense`	$1.32B	USD	1 Quarter
Operation and maintenance:	`SellingGeneralAndAdministrativeExpense`	$1.08B	USD	1 Quarter
Operation and maintenance:	`SellingGeneralAndAdministrativeExpense`	$2.22B	USD	2 Qtrs
Operation and maintenance:	`SellingGeneralAndAdministrativeExpense`	$1.89B	USD	2 Qtrs
Purchased natural gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$63.21M	USD	1 Quarter
Purchased natural gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$382.67M	USD	2 Qtrs
Purchased natural gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$239.45M	USD	2 Qtrs
Purchased natural gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$115.31M	USD	1 Quarter
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$147.38M	USD	2 Qtrs
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$73.66M	USD	1 Quarter
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$164.88M	USD	2 Qtrs
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$84.76M	USD	1 Quarter
Taxes, other than income	`TaxesExcludingIncomeAndExciseTaxes`	$129.03M	USD	2 Qtrs
Taxes, other than income	`TaxesExcludingIncomeAndExciseTaxes`	$115.72M	USD	2 Qtrs
Taxes, other than income	`TaxesExcludingIncomeAndExciseTaxes`	$53.19M	USD	1 Quarter
Taxes, other than income	`TaxesExcludingIncomeAndExciseTaxes`	$61.55M	USD	1 Quarter
Electric fuel and purchased power	`UtilitiesOperatingExpensePurchasedPower`	$48.29M	USD	2 Qtrs
Electric fuel and purchased power	`UtilitiesOperatingExpensePurchasedPower`	$18.11M	USD	1 Quarter
Electric fuel and purchased power	`UtilitiesOperatingExpensePurchasedPower`	$36.73M	USD	2 Qtrs
Electric fuel and purchased power	`UtilitiesOperatingExpensePurchasedPower`	$21.93M	USD	1 Quarter
Total operating expenses	`OperatingExpenses`	$1.29B	USD	1 Quarter
Total operating expenses	`OperatingExpenses`	$2.95B	USD	2 Qtrs
Total operating expenses	`OperatingExpenses`	$2.43B	USD	2 Qtrs
Total operating expenses	`OperatingExpenses`	$1.60B	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$120.57M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$222.85M	USD	2 Qtrs
Operating income	`OperatingIncomeLoss`	$137.69M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$187.91M	USD	2 Qtrs
Other income (expense)	`OtherNonoperatingIncomeExpense`	$9.03M	USD	1 Quarter
Other income (expense)	`OtherNonoperatingIncomeExpense`	$-6.65M	USD	2 Qtrs
Other income (expense)	`OtherNonoperatingIncomeExpense`	$-4.25M	USD	1 Quarter
Other income (expense)	`OtherNonoperatingIncomeExpense`	$12.38M	USD	2 Qtrs
Interest expense	`InterestExpense`	$46.84M	USD	2 Qtrs
Interest expense	`InterestExpense`	$28.11M	USD	1 Quarter
Interest expense	`InterestExpense`	$23.38M	USD	1 Quarter
Interest expense	`InterestExpense`	$53.37M	USD	2 Qtrs
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$88.21M	USD	1 Quarter
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$188.40M	USD	2 Qtrs
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$123.33M	USD	1 Quarter
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$127.89M	USD	2 Qtrs
Income taxes	`IncomeTaxExpenseBenefit`	$23.16M	USD	1 Quarter
Income taxes	`IncomeTaxExpenseBenefit`	$25.53M	USD	2 Qtrs
Income taxes	`IncomeTaxExpenseBenefit`	$36.11M	USD	2 Qtrs
Income taxes	`IncomeTaxExpenseBenefit`	$17.58M	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperations`	$70.63M	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperations`	$152.29M	USD	2 Qtrs
Income from continuing operations	`IncomeLossFromContinuingOperations`	$102.36M	USD	2 Qtrs
Income from continuing operations	`IncomeLossFromContinuingOperations`	$100.17M	USD	1 Quarter
Discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$34.00K	USD	2 Qtrs
Discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$35.00K	USD	1 Quarter
Discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$19.00K	USD	1 Quarter
Discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$65.00K	USD	2 Qtrs
Net income	`NetIncomeLoss`	$100.19M	USD	1 Quarter
Net income	`NetIncomeLoss`	$52.13M	USD	1 Quarter
Net income	`NetIncomeLoss`	$152.32M	USD	2 Qtrs
Net income	`NetIncomeLoss`	$102.43M	USD	2 Qtrs
Net income	`NetIncomeLoss`	$70.67M	USD	1 Quarter
Net income	`NetIncomeLoss`	$31.76M	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.50	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.35	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.76	USD	2 Qtrs
Income from continuing operations	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.50	USD	2 Qtrs
Discontinued operations, net of tax	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	-	USD	1 Quarter
Discontinued operations, net of tax	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	-	USD	2 Qtrs
Discontinued operations, net of tax	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	-	USD	1 Quarter
Discontinued operations, net of tax	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	-	USD	2 Qtrs
Earnings per share - basic	`EarningsPerShareBasic`	$0.76	USD	2 Qtrs
Earnings per share - basic	`EarningsPerShareBasic`	$0.50	USD	1 Quarter
Earnings per share - basic	`EarningsPerShareBasic`	$0.35	USD	1 Quarter
Earnings per share - basic	`EarningsPerShareBasic`	$0.50	USD	2 Qtrs
Income from continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.35	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.50	USD	2 Qtrs
Income from continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.50	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.76	USD	2 Qtrs
Discontinued operations, net of tax	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	-	USD	1 Quarter
Discontinued operations, net of tax	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	-	USD	1 Quarter
Discontinued operations, net of tax	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	-	USD	2 Qtrs
Discontinued operations, net of tax	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	-	USD	2 Qtrs
Earnings per share - diluted	`EarningsPerShareDiluted`	$0.35	USD	1 Quarter
Earnings per share - diluted	`EarningsPerShareDiluted`	$0.50	USD	2 Qtrs
Earnings per share - diluted	`EarningsPerShareDiluted`	$0.76	USD	2 Qtrs
Earnings per share - diluted	`EarningsPerShareDiluted`	$0.50	USD	1 Quarter
Weighted average common shares outstanding - basic	`WeightedAverageNumberOfSharesOutstandingBasic`	203.35M	shares	1 Quarter
Weighted average common shares outstanding - basic	`WeightedAverageNumberOfSharesOutstandingBasic`	201.34M	shares	1 Quarter
Weighted average common shares outstanding - basic	`WeightedAverageNumberOfSharesOutstandingBasic`	203.35M	shares	2 Qtrs
Weighted average common shares outstanding - basic	`WeightedAverageNumberOfSharesOutstandingBasic`	201.03M	shares	2 Qtrs
Weighted average common shares outstanding - diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	201.33M	shares	2 Qtrs
Weighted average common shares outstanding - diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	203.40M	shares	1 Quarter
Weighted average common shares outstanding - diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	203.40M	shares	2 Qtrs
Weighted average common shares outstanding - diluted	`WeightedAverageNumberOfDilutedSharesOutstanding`	201.69M	shares	1 Quarter

Cash Flow Statement 94 line items

Line Item	Tag	Value	Unit	Period
Net income	`NetIncomeLoss`	$102.43M	USD	2 Qtrs
Net income	`NetIncomeLoss`	$70.67M	USD	1 Quarter
Net income	`NetIncomeLoss`	$31.76M	USD	1 Quarter
Net income	`NetIncomeLoss`	$152.32M	USD	2 Qtrs
Net income	`NetIncomeLoss`	$52.13M	USD	1 Quarter
Net income	`NetIncomeLoss`	$100.19M	USD	1 Quarter
Discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$34.00K	USD	2 Qtrs
Discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$35.00K	USD	1 Quarter
Discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$19.00K	USD	1 Quarter
Discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$65.00K	USD	2 Qtrs
Income from continuing operations	`IncomeLossFromContinuingOperations`	$100.17M	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperations`	$102.36M	USD	2 Qtrs
Income from continuing operations	`IncomeLossFromContinuingOperations`	$70.63M	USD	1 Quarter
Income from continuing operations	`IncomeLossFromContinuingOperations`	$152.29M	USD	2 Qtrs
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$147.38M	USD	2 Qtrs
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$73.66M	USD	1 Quarter
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$164.88M	USD	2 Qtrs
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortization`	$84.76M	USD	1 Quarter
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$14.50M	USD	2 Qtrs
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$1.46M	USD	2 Qtrs
Provision for credit losses	`ProvisionForDoubtfulAccounts`	$-1.16M	USD	2 Qtrs
Provision for credit losses	`ProvisionForDoubtfulAccounts`	$2.24M	USD	2 Qtrs
Amortization of debt issuance costs	`AmortizationOfFinancingCosts`	$633.00K	USD	2 Qtrs
Amortization of debt issuance costs	`AmortizationOfFinancingCosts`	$709.00K	USD	2 Qtrs
Employee stock-based compensation costs	`ShareBasedCompensation`	$5.38M	USD	2 Qtrs
Employee stock-based compensation costs	`ShareBasedCompensation`	$8.72M	USD	2 Qtrs
Pension and postretirement benefit plan net periodic benefit credit	`PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash`	$-3.00M	USD	2 Qtrs
Pension and postretirement benefit plan net periodic benefit credit	`PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash`	$-2.46M	USD	2 Qtrs
Unrealized (gains) losses on investments	`UnrealizedGainLossOnInvestments`	$-13.21M	USD	2 Qtrs
Unrealized (gains) losses on investments	`UnrealizedGainLossOnInvestments`	$3.79M	USD	2 Qtrs
Gains on sales of assets	`GainLossOnDispositionOfAssets1`	$5.43M	USD	2 Qtrs
Gains on sales of assets	`GainLossOnDispositionOfAssets1`	$8.02M	USD	2 Qtrs
Receivables	`IncreaseDecreaseInReceivables`	$17.36M	USD	2 Qtrs
Receivables	`IncreaseDecreaseInReceivables`	$242.25M	USD	2 Qtrs
Inventories	`IncreaseDecreaseInInventories`	$63.84M	USD	2 Qtrs
Inventories	`IncreaseDecreaseInInventories`	$25.33M	USD	2 Qtrs
Other current assets	`IncreaseDecreaseInOtherCurrentAssets`	$52.77M	USD	2 Qtrs
Other current assets	`IncreaseDecreaseInOtherCurrentAssets`	$-12.89M	USD	2 Qtrs
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-3.85M	USD	2 Qtrs
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$104.45M	USD	2 Qtrs
Other current liabilities	`IncreaseDecreaseInOtherCurrentLiabilities`	$29.18M	USD	2 Qtrs
Other current liabilities	`IncreaseDecreaseInOtherCurrentLiabilities`	$-22.61M	USD	2 Qtrs
Pension and postretirement benefit plan contributions	`PensionAndOtherPostretirementBenefitContributions`	$225.00K	USD	2 Qtrs
Pension and postretirement benefit plan contributions	`PensionAndOtherPostretirementBenefitContributions`	$262.00K	USD	2 Qtrs
Other noncurrent changes	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$3.10M	USD	2 Qtrs
Other noncurrent changes	`IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet`	$4.51M	USD	2 Qtrs
Net cash provided by continuing operations	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$117.47M	USD	2 Qtrs
Net cash provided by continuing operations	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$182.87M	USD	2 Qtrs
Net cash used in discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$-58.00K	USD	2 Qtrs
Net cash used in discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$-16.00K	USD	2 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$182.81M	USD	2 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$117.45M	USD	2 Qtrs
Capital expenditures	`PaymentsToAcquireProductiveAssets`	$290.14M	USD	2 Qtrs
Capital expenditures	`PaymentsToAcquireProductiveAssets`	$261.94M	USD	2 Qtrs
Acquisitions, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$524.00K	USD	2 Qtrs
Acquisitions, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$13.72M	USD	2 Qtrs
Net proceeds from sale or disposition of property and other	`ProceedsFromSaleOfProductiveAssets`	$4.32M	USD	2 Qtrs
Net proceeds from sale or disposition of property and other	`ProceedsFromSaleOfProductiveAssets`	$12.40M	USD	2 Qtrs
Investments	`PaymentsForProceedsFromInvestments`	$4.68M	USD	2 Qtrs
Investments	`PaymentsForProceedsFromInvestments`	$3.24M	USD	2 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-266.50M	USD	2 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-291.02M	USD	2 Qtrs
Issuance of short-term borrowings	`ProceedsFromShortTermDebt`	$50.00M	USD	2 Qtrs
Issuance of short-term borrowings	`ProceedsFromShortTermDebt`	$100.00M	USD	2 Qtrs
Repayment of short-term borrowings	`RepaymentsOfShortTermDebt`	-	USD	2 Qtrs
Repayment of short-term borrowings	`RepaymentsOfShortTermDebt`	$50.00M	USD	2 Qtrs
Issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$171.77M	USD	2 Qtrs
Issuance of long-term debt	`ProceedsFromIssuanceOfLongTermDebt`	$334.33M	USD	2 Qtrs
Repayment of long-term debt	`RepaymentsOfLongTermDebt`	$48.15M	USD	2 Qtrs
Repayment of long-term debt	`RepaymentsOfLongTermDebt`	$147.54M	USD	2 Qtrs
Debt issuance costs	`PaymentsOfDebtIssuanceCosts`	$5.00K	USD	2 Qtrs
Debt issuance costs	`PaymentsOfDebtIssuanceCosts`	$1.07M	USD	2 Qtrs
Net proceeds from issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$54.65M	USD	2 Qtrs
Net proceeds from issuance of common stock	`ProceedsFromIssuanceOfCommonStock`	$-149.00K	USD	2 Qtrs
Dividends paid	`PaymentsOfDividends`	$88.46M	USD	2 Qtrs
Dividends paid	`PaymentsOfDividends`	$85.35M	USD	2 Qtrs
Repurchase of common stock	`PaymentsForRepurchaseOfCommonStock`	$6.70M	USD	2 Qtrs
Repurchase of common stock	`PaymentsForRepurchaseOfCommonStock`	$7.40M	USD	2 Qtrs
Tax withholding on stock-based compensation	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$4.90M	USD	2 Qtrs
Tax withholding on stock-based compensation	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$4.13M	USD	2 Qtrs
Tax withholding on stock-based compensation	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$4.90M	USD	1 Quarter
Tax withholding on stock-based compensation	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$4.13M	USD	1 Quarter
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$184.81M	USD	2 Qtrs
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$82.09M	USD	2 Qtrs
Increase (decrease) in cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$-1.60M	USD	2 Qtrs
Increase (decrease) in cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$11.23M	USD	2 Qtrs
Cash and cash equivalents -- beginning of year	`CashAndCashEquivalentsAtCarryingValue`	$59.55M	USD	Point-in-time
Cash and cash equivalents -- beginning of year	`CashAndCashEquivalentsAtCarryingValue`	$54.16M	USD	Point-in-time
Cash and cash equivalents -- beginning of year	`CashAndCashEquivalentsAtCarryingValue`	$57.95M	USD	Point-in-time
Cash and cash equivalents -- beginning of year	`CashAndCashEquivalentsAtCarryingValue`	$65.39M	USD	Point-in-time
Cash and cash equivalents -- end of period	`CashAndCashEquivalentsAtCarryingValue`	$59.55M	USD	Point-in-time
Cash and cash equivalents -- end of period	`CashAndCashEquivalentsAtCarryingValue`	$54.16M	USD	Point-in-time
Cash and cash equivalents -- end of period	`CashAndCashEquivalentsAtCarryingValue`	$57.95M	USD	Point-in-time
Cash and cash equivalents -- end of period	`CashAndCashEquivalentsAtCarryingValue`	$65.39M	USD	Point-in-time

Stockholders Equity 48 line items

Line Item	Tag	Value	Unit	Period
Common stock balance (in shares)	`CommonStockSharesIssued`	202.82M	shares	Point-in-time
Common stock balance (in shares)	`CommonStockSharesIssued`	203.89M	shares	Point-in-time
Common stock balance (in shares)	`CommonStockSharesIssued`	203.89M	shares	Point-in-time
Balance	`StockholdersEquity`	$3.08B	USD	Point-in-time
Balance	`StockholdersEquity`	$3.36B	USD	Point-in-time
Balance	`StockholdersEquity`	$3.39B	USD	Point-in-time
Balance	`StockholdersEquity`	$3.10B	USD	Point-in-time
Balance	`StockholdersEquity`	$3.20B	USD	Point-in-time
Balance	`StockholdersEquity`	$3.38B	USD	Point-in-time
Net income	`NetIncomeLoss`	$100.19M	USD	1 Quarter
Net income	`NetIncomeLoss`	$52.13M	USD	1 Quarter
Net income	`NetIncomeLoss`	$152.32M	USD	2 Qtrs
Net income	`NetIncomeLoss`	$70.67M	USD	1 Quarter
Net income	`NetIncomeLoss`	$102.43M	USD	2 Qtrs
Net income	`NetIncomeLoss`	$31.76M	USD	1 Quarter
Other comprehensive income	`OtherComprehensiveIncomeLossNetOfTax`	$-2.53M	USD	2 Qtrs
Other comprehensive income	`OtherComprehensiveIncomeLossNetOfTax`	$1.11M	USD	2 Qtrs
Other comprehensive income	`OtherComprehensiveIncomeLossNetOfTax`	$-2.80M	USD	1 Quarter
Other comprehensive income	`OtherComprehensiveIncomeLossNetOfTax`	$568.00K	USD	1 Quarter
Other comprehensive income	`OtherComprehensiveIncomeLossNetOfTax`	$269.00K	USD	1 Quarter
Other comprehensive income	`OtherComprehensiveIncomeLossNetOfTax`	$542.00K	USD	1 Quarter
Dividends declared on common stock	`DividendsCommonStockCash`	$44.45M	USD	1 Quarter
Dividends declared on common stock	`DividendsCommonStockCash`	$43.34M	USD	1 Quarter
Dividends declared on common stock	`DividendsCommonStockCash`	$42.94M	USD	1 Quarter
Dividends declared on common stock	`DividendsCommonStockCash`	$44.45M	USD	1 Quarter
Stock-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions`	$2.69M	USD	1 Quarter
Stock-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions`	$2.69M	USD	1 Quarter
Stock-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions`	$6.15M	USD	1 Quarter
Stock-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions`	$2.57M	USD	1 Quarter
Repurchase of common stock	`TreasuryStockValueAcquiredCostMethod`	$7.40M	USD	1 Quarter
Repurchase of common stock	`TreasuryStockValueAcquiredCostMethod`	$6.70M	USD	1 Quarter
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$4.90M	USD	1 Quarter
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$4.90M	USD	2 Qtrs
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$4.13M	USD	2 Qtrs
Issuance of common stock upon vesting of stock-based compensation, net of shares used for tax withholdings	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$4.13M	USD	1 Quarter
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$-127.00K	USD	1 Quarter
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$-22.00K	USD	1 Quarter
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$19.70M	USD	1 Quarter
Issuance of common stock	`StockIssuedDuringPeriodValueNewIssues`	$34.95M	USD	1 Quarter
Common stock balance (in shares)	`CommonStockSharesIssued`	202.82M	shares	Point-in-time
Common stock balance (in shares)	`CommonStockSharesIssued`	203.89M	shares	Point-in-time
Common stock balance (in shares)	`CommonStockSharesIssued`	203.89M	shares	Point-in-time
Balance	`StockholdersEquity`	$3.10B	USD	Point-in-time
Balance	`StockholdersEquity`	$3.39B	USD	Point-in-time
Balance	`StockholdersEquity`	$3.20B	USD	Point-in-time
Balance	`StockholdersEquity`	$3.08B	USD	Point-in-time
Balance	`StockholdersEquity`	$3.36B	USD	Point-in-time
Balance	`StockholdersEquity`	$3.38B	USD	Point-in-time

Comprehensive Income 64 line items

Line Item	Tag	Value	Unit	Period
Net income	`NetIncomeLoss`	$102.43M	USD	2 Qtrs
Net income	`NetIncomeLoss`	$70.67M	USD	1 Quarter
Net income	`NetIncomeLoss`	$31.76M	USD	1 Quarter
Net income	`NetIncomeLoss`	$152.32M	USD	2 Qtrs
Net income	`NetIncomeLoss`	$52.13M	USD	1 Quarter
Net income	`NetIncomeLoss`	$100.19M	USD	1 Quarter
Reclassification adjustment for loss on derivative instruments included in net income, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	$-36.00K	USD	1 Quarter
Reclassification adjustment for loss on derivative instruments included in net income, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	$-72.00K	USD	2 Qtrs
Reclassification adjustment for loss on derivative instruments included in net income, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	$-36.00K	USD	1 Quarter
Reclassification adjustment for loss on derivative instruments included in net income, tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax`	$-73.00K	USD	2 Qtrs
Reclassification adjustment for loss on derivative instruments included in net income, net of tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-112.00K	USD	1 Quarter
Reclassification adjustment for loss on derivative instruments included in net income, net of tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-223.00K	USD	2 Qtrs
Reclassification adjustment for loss on derivative instruments included in net income, net of tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-223.00K	USD	2 Qtrs
Reclassification adjustment for loss on derivative instruments included in net income, net of tax	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax`	$-111.00K	USD	1 Quarter
Amortization of postretirement liability losses included in net periodic benefit credit, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$148.00K	USD	1 Quarter
Amortization of postretirement liability losses included in net periodic benefit credit, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$160.00K	USD	1 Quarter
Amortization of postretirement liability losses included in net periodic benefit credit, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$312.00K	USD	2 Qtrs
Amortization of postretirement liability losses included in net periodic benefit credit, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$311.00K	USD	2 Qtrs
Amortization of postretirement liability losses included in net periodic benefit credit, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$923.00K	USD	2 Qtrs
Amortization of postretirement liability losses included in net periodic benefit credit, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$906.00K	USD	2 Qtrs
Amortization of postretirement liability losses included in net periodic benefit credit, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$457.00K	USD	1 Quarter
Amortization of postretirement liability losses included in net periodic benefit credit, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$461.00K	USD	1 Quarter
Reclassification of postretirement liability adjustment from regulatory asset, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentToAOCIPostretirementLiabilityAdjustmentFromRegulatoryAssetTax`	$1.09M	USD	1 Quarter
Reclassification of postretirement liability adjustment from regulatory asset, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentToAOCIPostretirementLiabilityAdjustmentFromRegulatoryAssetTax`	$1.09M	USD	2 Qtrs
Reclassification of postretirement liability adjustment from regulatory asset, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentToAOCIPostretirementLiabilityAdjustmentFromRegulatoryAssetTax`	-	USD	2 Qtrs
Reclassification of postretirement liability adjustment from regulatory asset, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentToAOCIPostretirementLiabilityAdjustmentFromRegulatoryAssetTax`	-	USD	1 Quarter
Reclassification of postretirement liability adjustment from regulatory asset, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentToAOCIPostretirementLiabilityAdjustmentFromRegulatoryAssetNetOfTax`	-	USD	2 Qtrs
Reclassification of postretirement liability adjustment from regulatory asset, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentToAOCIPostretirementLiabilityAdjustmentFromRegulatoryAssetNetOfTax`	$-3.27M	USD	1 Quarter
Reclassification of postretirement liability adjustment from regulatory asset, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentToAOCIPostretirementLiabilityAdjustmentFromRegulatoryAssetNetOfTax`	-	USD	1 Quarter
Reclassification of postretirement liability adjustment from regulatory asset, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentToAOCIPostretirementLiabilityAdjustmentFromRegulatoryAssetNetOfTax`	$-3.27M	USD	2 Qtrs
Postretirement liability adjustment	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$2.36M	USD	2 Qtrs
Postretirement liability adjustment	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-923.00K	USD	2 Qtrs
Postretirement liability adjustment	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-457.00K	USD	1 Quarter
Postretirement liability adjustment	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$2.80M	USD	1 Quarter
Net unrealized loss on available-for-sale investments arising during the period, tax	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax`	$-119.00K	USD	2 Qtrs
Net unrealized loss on available-for-sale investments arising during the period, tax	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax`	$-13.00K	USD	1 Quarter
Net unrealized loss on available-for-sale investments arising during the period, tax	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax`	$-34.00K	USD	1 Quarter
Net unrealized loss on available-for-sale investments arising during the period, tax	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax`	$-25.00K	USD	2 Qtrs
Net unrealized loss on available-for-sale investments arising during the period, net of tax	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$-52.00K	USD	1 Quarter
Net unrealized loss on available-for-sale investments arising during the period, net of tax	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$-128.00K	USD	1 Quarter
Net unrealized loss on available-for-sale investments arising during the period, net of tax	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$-448.00K	USD	2 Qtrs
Net unrealized loss on available-for-sale investments arising during the period, net of tax	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$-96.00K	USD	2 Qtrs
Reclassification adjustment for loss on available-for-sale investments included in net income, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax`	$-7.00K	USD	1 Quarter
Reclassification adjustment for loss on available-for-sale investments included in net income, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax`	$-15.00K	USD	2 Qtrs
Reclassification adjustment for loss on available-for-sale investments included in net income, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax`	$-6.00K	USD	1 Quarter
Reclassification adjustment for loss on available-for-sale investments included in net income, tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax`	$-15.00K	USD	2 Qtrs
Reclassification adjustment for loss on available-for-sale investments included in net income, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax`	$-25.00K	USD	1 Quarter
Reclassification adjustment for loss on available-for-sale investments included in net income, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax`	$-25.00K	USD	1 Quarter
Reclassification adjustment for loss on available-for-sale investments included in net income, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax`	$-60.00K	USD	2 Qtrs
Reclassification adjustment for loss on available-for-sale investments included in net income, net of tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax`	$-57.00K	USD	2 Qtrs
Net unrealized loss on available-for-sale investments	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-391.00K	USD	2 Qtrs
Net unrealized loss on available-for-sale investments	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-27.00K	USD	1 Quarter
Net unrealized loss on available-for-sale investments	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-103.00K	USD	1 Quarter
Net unrealized loss on available-for-sale investments	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-36.00K	USD	2 Qtrs
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$1.11M	USD	2 Qtrs
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-2.80M	USD	1 Quarter
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$568.00K	USD	1 Quarter
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$269.00K	USD	1 Quarter
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$542.00K	USD	1 Quarter
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-2.53M	USD	2 Qtrs
Comprehensive income attributable to common stockholders	`ComprehensiveIncomeNetOfTax`	$99.90M	USD	2 Qtrs
Comprehensive income attributable to common stockholders	`ComprehensiveIncomeNetOfTax`	$100.73M	USD	1 Quarter
Comprehensive income attributable to common stockholders	`ComprehensiveIncomeNetOfTax`	$153.43M	USD	2 Qtrs
Comprehensive income attributable to common stockholders	`ComprehensiveIncomeNetOfTax`	$67.87M	USD	1 Quarter

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