10-K Filing

Northwest Natural Holding Co CIK: 1733998 FY 2020

Filing Information

Form Type	10-K
Accession Number	`0001733998-21-000006`
Period End Date	20201231
Filing Date	20210226
Fiscal Year	2020
Fiscal Period	FY
XBRL Instance	nwn-20201231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 112 Income Statement 90 Cash Flow Statement 143 Stockholders Equity 28

Balance Sheet 112 line items

Line Item	Tag	Value	Unit	Period
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$9.65M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$30.17M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$3.47M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$12.63M	USD	Point-in-time
Accounts receivable	`AccountsReceivableGrossCurrent`	$67.14M	USD	Point-in-time
Accounts receivable	`AccountsReceivableGrossCurrent`	$88.08M	USD	Point-in-time
Accrued unbilled revenue	`UnbilledReceivablesCurrent`	$56.19M	USD	Point-in-time
Accrued unbilled revenue	`UnbilledReceivablesCurrent`	$57.95M	USD	Point-in-time
Allowance for uncollectible accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$673.00K	USD	Point-in-time
Allowance for uncollectible accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$3.22M	USD	Point-in-time
Allowance for uncollectible accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$977.00K	USD	Point-in-time
Allowance for uncollectible accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$956.00K	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$31.75M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsCurrent`	$41.93M	USD	Point-in-time
Derivative instruments	`DerivativeAssetsCurrent`	$13.68M	USD	Point-in-time
Derivative instruments	`DerivativeAssetsCurrent`	$6.80M	USD	Point-in-time
Inventories	`PublicUtilitiesInventory`	$43.98M	USD	Point-in-time
Inventories	`PublicUtilitiesInventory`	$42.69M	USD	Point-in-time
Gas reserves	`DeferredGasCost`	$15.28M	USD	Point-in-time
Gas reserves	`DeferredGasCost`	$11.41M	USD	Point-in-time
Income taxes receivable	`IncomeTaxesReceivable`	$6.00M	USD	Point-in-time
Income taxes receivable	`IncomeTaxesReceivable`	$256.00K	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$44.74M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$38.00M	USD	Point-in-time
Discontinued operations - current assets	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	-	USD	Point-in-time
Discontinued operations - current assets	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$15.13M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$323.25M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$293.69M	USD	Point-in-time
Property, plant, and equipment	`PropertyPlantAndEquipmentGross`	$3.73B	USD	Point-in-time
Property, plant, and equipment	`PropertyPlantAndEquipmentGross`	$3.48B	USD	Point-in-time
Less: Accumulated depreciation	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$1.04B	USD	Point-in-time
Less: Accumulated depreciation	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$1.08B	USD	Point-in-time
Total property, plant, and equipment, net	`PropertyPlantAndEquipmentNet`	$2.65B	USD	Point-in-time
Total property, plant, and equipment, net	`PropertyPlantAndEquipmentNet`	$2.44B	USD	Point-in-time
Gas reserves	`InventoryGasInStorageUndergroundNoncurrent`	$34.48M	USD	Point-in-time
Gas reserves	`InventoryGasInStorageUndergroundNoncurrent`	$48.39M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$348.93M	USD	Point-in-time
Regulatory assets	`RegulatoryAssetsNoncurrent`	$343.15M	USD	Point-in-time
Derivative instruments	`DerivativeAssetsNoncurrent`	$3.34M	USD	Point-in-time
Derivative instruments	`DerivativeAssetsNoncurrent`	$6.13M	USD	Point-in-time
Other investments	`OtherLongTermInvestments`	$63.33M	USD	Point-in-time
Other investments	`OtherLongTermInvestments`	$49.26M	USD	Point-in-time
Operating lease right of use asset	`OperatingLeaseRightOfUseAsset`	$77.45M	USD	Point-in-time
Operating lease right of use asset	`OperatingLeaseRightOfUseAsset`	$2.95M	USD	Point-in-time
Assets under sales-type leases	`NetInvestmentInLeaseNoncurrent`	$143.76M	USD	Point-in-time
Assets under sales-type leases	`NetInvestmentInLeaseNoncurrent`	$146.31M	USD	Point-in-time
Goodwill	`Goodwill`	$49.93M	USD	Point-in-time
Goodwill	`Goodwill`	$69.22M	USD	Point-in-time
Other non-current assets	`OtherAssetsNoncurrent`	$49.13M	USD	Point-in-time
Other non-current assets	`OtherAssetsNoncurrent`	$38.46M	USD	Point-in-time
Total non-current assets	`AssetsNoncurrent`	$3.43B	USD	Point-in-time
Total non-current assets	`AssetsNoncurrent`	$3.13B	USD	Point-in-time
Total assets	`Assets`	$3.43B	USD	Point-in-time
Total assets	`Assets`	$3.76B	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$149.10M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$304.52M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$95.34M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$75.11M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$113.37M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$97.97M	USD	Point-in-time
Taxes accrued	`AccruedIncomeTaxesCurrent`	$11.97M	USD	Point-in-time
Taxes accrued	`AccruedIncomeTaxesCurrent`	$13.81M	USD	Point-in-time
Interest accrued	`InterestPayableCurrent`	$7.45M	USD	Point-in-time
Interest accrued	`InterestPayableCurrent`	$7.44M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$50.36M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityCurrent`	$44.66M	USD	Point-in-time
Derivative instruments	`DerivativeLiabilitiesCurrent`	$4.20M	USD	Point-in-time
Derivative instruments	`DerivativeLiabilitiesCurrent`	$2.00M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityCurrent`	$2.10M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityCurrent`	$1.10M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$62.70M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$52.33M	USD	Point-in-time
Discontinued operations - current liabilities	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$13.71M	USD	Point-in-time
Discontinued operations - current liabilities	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	-	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$627.08M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$482.17M	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$860.08M	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$805.96M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$639.66M	USD	Point-in-time
Regulatory liabilities	`RegulatoryLiabilityNoncurrent`	$625.72M	USD	Point-in-time
Pension and other postretirement benefit liabilities	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$217.29M	USD	Point-in-time
Pension and other postretirement benefit liabilities	`PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent`	$228.13M	USD	Point-in-time
Derivative instruments	`DerivativeLiabilitiesNoncurrent`	$2.85M	USD	Point-in-time
Derivative instruments	`DerivativeLiabilitiesNoncurrent`	$609.00K	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityNoncurrent`	$80.62M	USD	Point-in-time
Operating lease liabilities	`OperatingLeaseLiabilityNoncurrent`	$841.00K	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$120.77M	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$123.39M	USD	Point-in-time
Total deferred credits and other non-current liabilities	`DeferredCreditsAndOtherLiabilitiesNoncurrent`	$1.38B	USD	Point-in-time
Total deferred credits and other non-current liabilities	`DeferredCreditsAndOtherLiabilitiesNoncurrent`	$1.27B	USD	Point-in-time
Commitments and contingencies (see Note 17 and Note 18)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and contingencies (see Note 17 and Note 18)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock - no par value	`CommonStockValue`	$565.11M	USD	Point-in-time
Common stock - no par value	`CommonStockValue`	$558.28M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$336.52M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$318.45M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-12.90M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-10.73M	USD	Point-in-time
Total equity	`StockholdersEquity`	$866.00M	USD	Point-in-time
Total equity	`StockholdersEquity`	$888.73M	USD	Point-in-time
Total liabilities and equity	`LiabilitiesAndStockholdersEquity`	$3.76B	USD	Point-in-time
Total liabilities and equity	`LiabilitiesAndStockholdersEquity`	$3.43B	USD	Point-in-time
Par Value (in dollars per share)	`CommonStockNoParValue`	-	USD	Point-in-time
Par Value (in dollars per share)	`CommonStockNoParValue`	-	USD	Point-in-time
Shares Authorized (in shares)	`CommonStockSharesAuthorized`	100.00M	shares	Point-in-time
Shares Authorized (in shares)	`CommonStockSharesAuthorized`	100.00M	shares	Point-in-time
Shares issued (in shares)	`CommonStockSharesIssued`	30.47M	shares	Point-in-time
Shares issued (in shares)	`CommonStockSharesIssued`	30.59M	shares	Point-in-time
Shares outstanding (in shares)	`CommonStockSharesOutstanding`	30.59M	shares	Point-in-time
Shares outstanding (in shares)	`CommonStockSharesOutstanding`	30.47M	shares	Point-in-time
Deferred Income Tax Liabilities, Net	`DeferredIncomeTaxLiabilitiesNet`	$295.64M	USD	Point-in-time
Deferred Income Tax Liabilities, Net	`DeferredIncomeTaxLiabilitiesNet`	$319.29M	USD	Point-in-time

Income Statement 90 line items

Line Item	Tag	Value	Unit	Period
Operating revenues	`Revenues`	$746.37M	USD	Annual
Operating revenues	`Revenues`	$773.68M	USD	Annual
Operating revenues	`Revenues`	$706.14M	USD	Annual
Cost of gas	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$254.91M	USD	Annual
Cost of gas	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$262.75M	USD	Annual
Cost of gas	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$255.52M	USD	Annual
Operations and maintenance	`OperatingCostsAndExpenses`	$180.13M	USD	Annual
Operations and maintenance	`OperatingCostsAndExpenses`	$178.19M	USD	Annual
Operations and maintenance	`OperatingCostsAndExpenses`	$156.70M	USD	Annual
Environmental remediation	`EnvironmentalRemediationExpense`	$12.34M	USD	Annual
Environmental remediation	`EnvironmentalRemediationExpense`	$11.13M	USD	Annual
Environmental remediation	`EnvironmentalRemediationExpense`	$9.69M	USD	Annual
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$32.39M	USD	Annual
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$32.17M	USD	Annual
General taxes	`TaxesExcludingIncomeAndExciseTaxes`	$35.08M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$103.68M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$91.50M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$85.16M	USD	Annual
Other operating expenses	`OtherCostAndExpenseOperating`	$3.70M	USD	Annual
Other operating expenses	`OtherCostAndExpenseOperating`	$3.23M	USD	Annual
Other operating expenses	`OtherCostAndExpenseOperating`	$3.25M	USD	Annual
Total operating expenses	`OperatingExpenses`	$573.98M	USD	Annual
Total operating expenses	`OperatingExpenses`	$602.90M	USD	Annual
Total operating expenses	`OperatingExpenses`	$625.33M	USD	Annual
Income from operations	`OperatingIncomeLoss`	$148.35M	USD	Annual
Income from operations	`OperatingIncomeLoss`	$132.16M	USD	Annual
Income from operations	`OperatingIncomeLoss`	$143.47M	USD	Annual
Other income (expense), net	`OtherNonoperatingIncomeExpense`	$-22.84M	USD	Annual
Other income (expense), net	`OtherNonoperatingIncomeExpense`	$-13.94M	USD	Annual
Other income (expense), net	`OtherNonoperatingIncomeExpense`	$-3.60M	USD	Annual
Interest expense, net	`InterestIncomeExpenseNonoperatingNet`	$-42.69M	USD	Annual
Interest expense, net	`InterestIncomeExpenseNonoperatingNet`	$-43.05M	USD	Annual
Interest expense, net	`InterestIncomeExpenseNonoperatingNet`	$-37.06M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$91.50M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$91.36M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$77.95M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$21.08M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$12.64M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$24.19M	USD	Annual
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$67.31M	USD	Annual
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$65.31M	USD	Annual
Net income from continuing operations	`IncomeLossFromContinuingOperations`	$70.27M	USD	Annual
Income (loss) from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-3.58M	USD	Annual
Income (loss) from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$6.51M	USD	Annual
Income (loss) from discontinued operations, net of tax	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-2.74M	USD	Annual
Net income	`NetIncomeLoss`	$76.78M	USD	Annual
Net income	`NetIncomeLoss`	$61.73M	USD	Annual
Net income	`NetIncomeLoss`	$64.57M	USD	Annual
Change in employee benefit plan liability, net of taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-2.85M	USD	Annual
Change in employee benefit plan liability, net of taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-2.65M	USD	Annual
Change in employee benefit plan liability, net of taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$476.00K	USD	Annual
Amortization of non-qualified employee benefit plan liability, net of taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$774.00K	USD	Annual
Amortization of non-qualified employee benefit plan liability, net of taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$679.00K	USD	Annual
Amortization of non-qualified employee benefit plan liability, net of taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax`	$476.00K	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTax`	$59.56M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTax`	$74.61M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTax`	$65.82M	USD	Annual
Change in employee benefit plan liability, taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$956.00	USD	Annual
Change in employee benefit plan liability, taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-166.00	USD	Annual
Change in employee benefit plan liability, taxes	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$1.02K	USD	Annual
Amortization of non-qualified employee benefit plan liability, taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$-172.00	USD	Annual
Amortization of non-qualified employee benefit plan liability, taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$-278.00	USD	Annual
Amortization of non-qualified employee benefit plan liability, taxes	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax`	$-244.00	USD	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	30.54M	shares	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	29.79M	shares	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	28.80M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	28.87M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	30.60M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	29.86M	shares	Annual
Basic (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.19	USD	Annual
Basic (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.30	USD	Annual
Basic (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$2.34	USD	Annual
Diluted (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.30	USD	Annual
Diluted (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.19	USD	Annual
Diluted (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$2.33	USD	Annual
Basic (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.10	USD	Annual
Basic (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.12	USD	Annual
Basic (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$0.21	USD	Annual
Diluted (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$-0.12	USD	Annual
Diluted (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$-0.09	USD	Annual
Diluted (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$0.21	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$2.51	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$2.24	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$2.07	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$2.24	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$2.51	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$2.07	USD	Annual
Utilities Operating Expense, Taxes	`UtilitiesOperatingExpenseTaxes`	$30.29M	USD	Annual
Utilities Operating Expense, Taxes	`UtilitiesOperatingExpenseTaxes`	$30.32M	USD	Annual
Utilities Operating Expense, Taxes	`UtilitiesOperatingExpenseTaxes`	$30.08M	USD	Annual

Cash Flow Statement 143 line items

Line Item	Tag	Value	Unit	Period
Net income	`NetIncomeLoss`	$76.78M	USD	Annual
Net income	`NetIncomeLoss`	$61.73M	USD	Annual
Net income	`NetIncomeLoss`	$64.57M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$103.68M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$91.50M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$85.16M	USD	Annual
Regulatory amortization of gas reserves	`AmortizationOfRegulatoryAsset`	$19.17M	USD	Annual
Regulatory amortization of gas reserves	`AmortizationOfRegulatoryAsset`	$16.68M	USD	Annual
Regulatory amortization of gas reserves	`AmortizationOfRegulatoryAsset`	$17.78M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxesAndTaxCredits`	$6.32M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxesAndTaxCredits`	$18.67M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxesAndTaxCredits`	$14.36M	USD	Annual
Qualified defined benefit pension plan expense	`PensionExpense`	$8.11M	USD	Annual
Qualified defined benefit pension plan expense	`PensionExpense`	$16.50M	USD	Annual
Qualified defined benefit pension plan expense	`PensionExpense`	$18.37M	USD	Annual
Contributions to qualified defined benefit pension plans	`PensionContributions`	$28.98M	USD	Annual
Contributions to qualified defined benefit pension plans	`PensionContributions`	$15.54M	USD	Annual
Contributions to qualified defined benefit pension plans	`PensionContributions`	$10.97M	USD	Annual
Deferred environmental expenditures, net	`OtherIncreaseDecreaseInEnvironmentalLiabilities`	$-14.53M	USD	Annual
Deferred environmental expenditures, net	`OtherIncreaseDecreaseInEnvironmentalLiabilities`	$-16.23M	USD	Annual
Deferred environmental expenditures, net	`OtherIncreaseDecreaseInEnvironmentalLiabilities`	$-27.87M	USD	Annual
Environmental remediation expense	`EnvironmentalRemediationExpense`	$12.34M	USD	Annual
Environmental remediation expense	`EnvironmentalRemediationExpense`	$11.13M	USD	Annual
Environmental remediation expense	`EnvironmentalRemediationExpense`	$9.69M	USD	Annual
Regulatory revenue deferral from the TCJA	`IncreaseDecreaseInRegulatoryLiabilities`	$7.93M	USD	Annual
Regulatory revenue deferral from the TCJA	`IncreaseDecreaseInRegulatoryLiabilities`	-	USD	Annual
Regulatory revenue deferral from the TCJA	`IncreaseDecreaseInRegulatoryLiabilities`	$853.00K	USD	Annual
Regulatory disallowance of pension costs	`PensionExpenseReversalOfExpenseNoncash`	-	USD	Annual
Regulatory disallowance of pension costs	`PensionExpenseReversalOfExpenseNoncash`	-	USD	Annual
Regulatory disallowance of pension costs	`PensionExpenseReversalOfExpenseNoncash`	$10.50M	USD	Annual
Gain on sale of discontinued operations, net of tax	`DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax`	-	USD	Annual
Gain on sale of discontinued operations, net of tax	`DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax`	-	USD	Annual
Gain on sale of discontinued operations, net of tax	`DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax`	$5.90M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$6.94M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$-13.91M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$-1.60M	USD	Annual
Receivables, net	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-181.00K	USD	Annual
Receivables, net	`IncreaseDecreaseInAccountsAndOtherReceivables`	$16.80M	USD	Annual
Receivables, net	`IncreaseDecreaseInAccountsAndOtherReceivables`	$-5.84M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$-1.26M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$5.97M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$-3.21M	USD	Annual
Income and other taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-16.90M	USD	Annual
Income and other taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-10.71M	USD	Annual
Income and other taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$4.53M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-15.91M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$16.79M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-16.48M	USD	Annual
Deferred gas costs	`IncreaseDecreaseInDeferredGasCost`	$14.39M	USD	Annual
Deferred gas costs	`IncreaseDecreaseInDeferredGasCost`	$23.47M	USD	Annual
Deferred gas costs	`IncreaseDecreaseInDeferredGasCost`	$-17.59M	USD	Annual
Decoupling mechanism	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$-2.88M	USD	Annual
Decoupling mechanism	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$-18.66M	USD	Annual
Decoupling mechanism	`IncreaseDecreaseInRegulatoryAssetsAndLiabilities`	$-4.50M	USD	Annual
Other, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$3.42M	USD	Annual
Other, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$4.14M	USD	Annual
Other, net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$12.47M	USD	Annual
Discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$1.89M	USD	Annual
Discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$-645.00K	USD	Annual
Discontinued operations	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$712.00K	USD	Annual
Cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$185.30M	USD	Annual
Cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$143.02M	USD	Annual
Cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$168.77M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$214.64M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$223.47M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$273.02M	USD	Annual
Acquisitions, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$38.26M	USD	Annual
Acquisitions, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$873.00K	USD	Annual
Acquisitions, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$56.79M	USD	Annual
Leasehold improvement expenditures	`OperatingLeasePaymentsUse`	$18.81M	USD	Annual
Leasehold improvement expenditures	`OperatingLeasePaymentsUse`	$7.88M	USD	Annual
Leasehold improvement expenditures	`OperatingLeasePaymentsUse`	$4.42M	USD	Annual
Proceeds from the sale of assets	`ProceedsFromSaleOfLandHeldForUse`	$477.00K	USD	Annual
Proceeds from the sale of assets	`ProceedsFromSaleOfLandHeldForUse`	$8.15M	USD	Annual
Proceeds from the sale of assets	`ProceedsFromSaleOfLandHeldForUse`	$659.00K	USD	Annual
Proceeds from Sale of Equity Method Investments	`ProceedsFromSaleOfEquityMethodInvestments`	-	USD	Annual
Proceeds from Sale of Equity Method Investments	`ProceedsFromSaleOfEquityMethodInvestments`	-	USD	Annual
Proceeds from Sale of Equity Method Investments	`ProceedsFromSaleOfEquityMethodInvestments`	$7.00M	USD	Annual
Proceeds from sale of discontinued operations	`ProceedsFromDivestitureOfBusinesses`	-	USD	Annual
Proceeds from sale of discontinued operations	`ProceedsFromDivestitureOfBusinesses`	-	USD	Annual
Proceeds from sale of discontinued operations	`ProceedsFromDivestitureOfBusinesses`	$12.50M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-1.65M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-1.42M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$3.54M	USD	Annual
Discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$573.00K	USD	Annual
Discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$-4.42M	USD	Annual
Discontinued operations	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$-1.83M	USD	Annual
Cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-294.28M	USD	Annual
Cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-303.78M	USD	Annual
Cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-217.45M	USD	Annual
Proceeds from stock options exercised	`ProceedsFromStockOptionsExercised`	$2.02M	USD	Annual
Proceeds from stock options exercised	`ProceedsFromStockOptionsExercised`	$1.55M	USD	Annual
Proceeds from stock options exercised	`ProceedsFromStockOptionsExercised`	$68.00K	USD	Annual
Proceeds from common stock issued	`ProceedsFromIssuanceOfCommonStock`	-	USD	Annual
Proceeds from common stock issued	`ProceedsFromIssuanceOfCommonStock`	-	USD	Annual
Proceeds from common stock issued	`ProceedsFromIssuanceOfCommonStock`	$92.96M	USD	Annual
Long-term debt issued	`ProceedsFromIssuanceOfLongTermDebt`	$50.00M	USD	Annual
Long-term debt issued	`ProceedsFromIssuanceOfLongTermDebt`	$175.00M	USD	Annual
Long-term debt issued	`ProceedsFromIssuanceOfLongTermDebt`	$150.00M	USD	Annual
Long-term debt retired	`RepaymentsOfLongTermDebt`	$75.00M	USD	Annual
Long-term debt retired	`RepaymentsOfLongTermDebt`	$30.00M	USD	Annual
Long-term debt retired	`RepaymentsOfLongTermDebt`	$97.00M	USD	Annual
Repayments of Short-term Debt	`RepaymentsOfDebtMaturingInMoreThanThreeMonths`	-	USD	Annual
Repayments of Short-term Debt	`RepaymentsOfDebtMaturingInMoreThanThreeMonths`	-	USD	Annual
Repayments of Short-term Debt	`RepaymentsOfDebtMaturingInMoreThanThreeMonths`	$150.00M	USD	Annual
Proceeds from issuances of commercial paper, maturities greater than 90 days	`ProceedsFromIssuancesOfCommercialPaperMaturitiesGreaterThan90Days`	-	USD	Annual
Proceeds from issuances of commercial paper, maturities greater than 90 days	`ProceedsFromIssuancesOfCommercialPaperMaturitiesGreaterThan90Days`	$195.03M	USD	Annual
Proceeds from issuances of commercial paper, maturities greater than 90 days	`ProceedsFromIssuancesOfCommercialPaperMaturitiesGreaterThan90Days`	-	USD	Annual
Changes in other short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$-68.52M	USD	Annual
Changes in other short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$-39.60M	USD	Annual
Changes in other short-term debt, net	`ProceedsFromRepaymentsOfShortTermDebt`	$163.27M	USD	Annual
Cash dividend payments on common stock	`PaymentsOfDividendsCommonStock`	$55.42M	USD	Annual
Cash dividend payments on common stock	`PaymentsOfDividendsCommonStock`	$51.31M	USD	Annual
Cash dividend payments on common stock	`PaymentsOfDividendsCommonStock`	$53.34M	USD	Annual
Stock purchases related to acquisitions	`PaymentsfortheRepurchaseofCommonStockRelatedtoAcquisitions`	-	USD	Annual
Stock purchases related to acquisitions	`PaymentsfortheRepurchaseofCommonStockRelatedtoAcquisitions`	$7.95M	USD	Annual
Stock purchases related to acquisitions	`PaymentsfortheRepurchaseofCommonStockRelatedtoAcquisitions`	-	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-3.30M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-2.61M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-715.00K	USD	Annual
Cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$171.78M	USD	Annual
Cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$115.50M	USD	Annual
Cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$57.84M	USD	Annual
Increase (decrease) in cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$9.16M	USD	Annual
Increase (decrease) in cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$20.52M	USD	Annual
Increase (decrease) in cash and cash equivalents	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect`	$-2.98M	USD	Annual
Cash and cash equivalents, beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$9.65M	USD	Point-in-time
Cash and cash equivalents, beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$30.17M	USD	Point-in-time
Cash and cash equivalents, beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$3.47M	USD	Point-in-time
Cash and cash equivalents, beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$12.63M	USD	Point-in-time
Cash and cash equivalents, end of period	`CashAndCashEquivalentsAtCarryingValue`	$9.65M	USD	Point-in-time
Cash and cash equivalents, end of period	`CashAndCashEquivalentsAtCarryingValue`	$30.17M	USD	Point-in-time
Cash and cash equivalents, end of period	`CashAndCashEquivalentsAtCarryingValue`	$3.47M	USD	Point-in-time
Cash and cash equivalents, end of period	`CashAndCashEquivalentsAtCarryingValue`	$12.63M	USD	Point-in-time
Interest paid, net of capitalization	`InterestPaidNet`	$42.65M	USD	Annual
Interest paid, net of capitalization	`InterestPaidNet`	$35.32M	USD	Annual
Interest paid, net of capitalization	`InterestPaidNet`	$41.23M	USD	Annual
Income taxes paid (refunded)	`IncomeTaxesPaidNet`	$13.64M	USD	Annual
Income taxes paid (refunded)	`IncomeTaxesPaidNet`	$-96.00K	USD	Annual
Income taxes paid (refunded)	`IncomeTaxesPaidNet`	$27.37M	USD	Annual
Proceeds from Debt, Maturing in More than Three Months	`ProceedsFromDebtMaturingInMoreThanThreeMonths`	-	USD	Annual
Proceeds from Debt, Maturing in More than Three Months	`ProceedsFromDebtMaturingInMoreThanThreeMonths`	$150.00M	USD	Annual
Proceeds from Debt, Maturing in More than Three Months	`ProceedsFromDebtMaturingInMoreThanThreeMonths`	-	USD	Annual

Stockholders Equity 28 line items

Line Item	Tag	Value	Unit	Period
Beginning Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$762.63M	USD	Point-in-time
Beginning Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$866.00M	USD	Point-in-time
Beginning Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$888.73M	USD	Point-in-time
Beginning Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$742.78M	USD	Point-in-time
Comprehensive income	`ComprehensiveIncomeNetOfTax`	$59.56M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTax`	$74.61M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTax`	$65.82M	USD	Annual
Dividends on common stock	`DividendsCommonStockCash`	$58.71M	USD	Annual
Dividends on common stock	`DividendsCommonStockCash`	$56.83M	USD	Annual
Dividends on common stock	`DividendsCommonStockCash`	$54.74M	USD	Annual
Stock-based compensation	`StockGrantedDuringPeriodValueSharebasedCompensation`	$4.36M	USD	Annual
Stock-based compensation	`StockGrantedDuringPeriodValueSharebasedCompensation`	$3.02M	USD	Annual
Stock-based compensation	`StockGrantedDuringPeriodValueSharebasedCompensation`	$2.60M	USD	Annual
Shares issued pursuant to equity based plans	`StockIssuedDuringPeriodValueShareBasedCompensation`	$5.17M	USD	Annual
Shares issued pursuant to equity based plans	`StockIssuedDuringPeriodValueShareBasedCompensation`	$5.08M	USD	Annual
Shares issued pursuant to equity based plans	`StockIssuedDuringPeriodValueShareBasedCompensation`	$2.47M	USD	Annual
Issuance of common stock, net of issuance costs	`StockIssuedDuringPeriodValueNewIssues`	$92.96M	USD	Annual
Issuance of common stock, net of issuance costs	`StockIssuedDuringPeriodValueNewIssues`	$93.00M	USD	2 Qtrs
Cash purchase of shares for business combination	`StockRepurchasedDuringPeriodValue`	$7.95M	USD	Annual
Value of shares transferred for business combination	`BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable`	$8.53M	USD	Annual
Reclassification of tax effects from the TCJA	`StrandedDeferredTaxRemeasurementBenefit`	-	USD	Annual
Ending Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$762.63M	USD	Point-in-time
Ending Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$866.00M	USD	Point-in-time
Ending Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$888.73M	USD	Point-in-time
Ending Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$742.78M	USD	Point-in-time
Dividends on common stock (in dollars per share)	`CommonStockDividendsPerShareCashPaid`	$1.91	USD	Annual
Dividends on common stock (in dollars per share)	`CommonStockDividendsPerShareCashPaid`	$1.90	USD	Annual
Dividends on common stock (in dollars per share)	`CommonStockDividendsPerShareCashPaid`	$1.89	USD	Annual

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