10-Q Filing

SOUTHWEST GAS CORP CIK: 92416 Q2 2016

Filing Information

Form Type	10-Q
Accession Number	`0001193125-16-675313`
Period End Date	20160630
Filing Date	20160808
Fiscal Year	2016
Fiscal Period	Q2
XBRL Instance	swx-20160630.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 97 Income Statement 138 Cash Flow Statement 158 Stockholders Equity 84

Balance Sheet 97 line items

Line Item	Tag	Value	Unit	Period
Common stock, par	`CommonStockParOrStatedValuePerShare`	$1.00	USD	Point-in-time
Common stock, par	`CommonStockParOrStatedValuePerShare`	$1.00	USD	Point-in-time
Common stock, authorized	`CommonStockSharesAuthorized`	60.00M	shares	Point-in-time
Common stock, authorized	`CommonStockSharesAuthorized`	60.00M	shares	Point-in-time
Common stock, issued	`CommonStockSharesIssued`	47.38M	shares	Point-in-time
Common stock, issued	`CommonStockSharesIssued`	47.48M	shares	Point-in-time
Gas plant	`PublicUtilitiesPropertyPlantAndEquipmentPlantInService`	$5.85B	USD	Point-in-time
Gas plant	`PublicUtilitiesPropertyPlantAndEquipmentPlantInService`	$6.02B	USD	Point-in-time
Common stock, outstanding	`CommonStockSharesOutstanding`	47.48M	shares	Point-in-time
Less: accumulated depreciation	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$2.08B	USD	Point-in-time
Common stock, outstanding	`CommonStockSharesOutstanding`	47.38M	shares	Point-in-time
Less: accumulated depreciation	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$2.13B	USD	Point-in-time
Acquisition adjustments, net	`PublicUtilitiesPropertyPlantAndEquipmentAmountOfAcquisitionAdjustments1`	$280.00K	USD	Point-in-time
Acquisition adjustments, net	`PublicUtilitiesPropertyPlantAndEquipmentAmountOfAcquisitionAdjustments1`	$370.00K	USD	Point-in-time
Construction work in progress	`PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress`	$119.81M	USD	Point-in-time
Construction work in progress	`PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress`	$115.22M	USD	Point-in-time
Net utility plant	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$3.89B	USD	Point-in-time
Net utility plant	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$4.00B	USD	Point-in-time
Other property and investments	`OtherPropertyAndInvestments`	$346.06M	USD	Point-in-time
Other property and investments	`OtherPropertyAndInvestments`	$313.53M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$48.91M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$39.57M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$26.89M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$36.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$12.13M	USD	Point-in-time
Accounts receivable, net of allowances	`AccountsReceivableNetCurrent`	$314.51M	USD	Point-in-time
Accounts receivable, net of allowances	`AccountsReceivableNetCurrent`	$263.86M	USD	Point-in-time
Accrued utility revenue	`AccruedUtilityRevenue`	$32.50M	USD	Point-in-time
Accrued utility revenue	`AccruedUtilityRevenue`	$74.70M	USD	Point-in-time
Income taxes receivable, net	`IncomeTaxesReceivable`	$37.45M	USD	Point-in-time
Income taxes receivable, net	`IncomeTaxesReceivable`	$34.17M	USD	Point-in-time
Deferred purchased gas costs	`DeferredGasCost`	-	USD	Point-in-time
Deferred purchased gas costs	`DeferredGasCost`	$3.59M	USD	Point-in-time
Prepaids and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$95.20M	USD	Point-in-time
Prepaids and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$85.83M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$558.17M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$431.76M	USD	Point-in-time
Goodwill	`Goodwill`	$126.14M	USD	Point-in-time
Goodwill	`Goodwill`	$144.09M	USD	Point-in-time
Deferred income taxes	`DeferredTaxAssetsNetNoncurrent`	$752.00K	USD	Point-in-time
Deferred income taxes	`DeferredTaxAssetsNetNoncurrent`	$428.00K	USD	Point-in-time
Deferred charges and other assets	`OtherAssetsNoncurrent`	$469.32M	USD	Point-in-time
Deferred charges and other assets	`OtherAssetsNoncurrent`	$444.05M	USD	Point-in-time
Total noncurrent assets	`AssetsNoncurrent`	$595.89M	USD	Point-in-time
Total noncurrent assets	`AssetsNoncurrent`	$588.88M	USD	Point-in-time
Total assets	`Assets`	$5.37B	USD	Point-in-time
Total assets	`Assets`	$5.36B	USD	Point-in-time
Common stock, $1 par (authorized - 60,000,000 shares; issued and outstanding - 47,476,604 and 47,377,575 shares)	`CommonStockValue`	$49.01M	USD	Point-in-time
Common stock, $1 par (authorized - 60,000,000 shares; issued and outstanding - 47,476,604 and 47,377,575 shares)	`CommonStockValue`	$49.11M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$896.45M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$900.89M	USD	Point-in-time
Accumulated other comprehensive income (loss), net	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-47.20M	USD	Point-in-time
Accumulated other comprehensive income (loss), net	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-50.27M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$699.22M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$741.15M	USD	Point-in-time
Total Southwest Gas Corporation equity	`StockholdersEquity`	$1.64B	USD	Point-in-time
Total Southwest Gas Corporation equity	`StockholdersEquity`	$1.59B	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$-2.08M	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$-2.17M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.64B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.59B	USD	Point-in-time
Redeemable noncontrolling interest	`RedeemableNoncontrollingInterestEquityCarryingAmount`	$16.11M	USD	Point-in-time
Redeemable noncontrolling interest	`RedeemableNoncontrollingInterestEquityCarryingAmount`	$15.54M	USD	Point-in-time
Long-term debt, less current maturities	`LongTermDebtNoncurrent`	$1.43B	USD	Point-in-time
Long-term debt, less current maturities	`LongTermDebtNoncurrent`	$1.55B	USD	Point-in-time
Total capitalization	`CapitalizationLongtermDebtAndEquity`	$3.16B	USD	Point-in-time
Total capitalization	`CapitalizationLongtermDebtAndEquity`	$3.09B	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$19.48M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$49.57M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$18.00M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	-	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$164.86M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$132.20M	USD	Point-in-time
Customer deposits	`CustomerDepositsCurrent`	$72.63M	USD	Point-in-time
Customer deposits	`CustomerDepositsCurrent`	$72.81M	USD	Point-in-time
Income taxes payable	`IncomeTaxesPayable`	$7.00K	USD	Point-in-time
Income taxes payable	`IncomeTaxesPayable`	$940.00K	USD	Point-in-time
Accrued general taxes	`AccrualForTaxesOtherThanIncomeTaxesCurrent`	$47.34M	USD	Point-in-time
Accrued general taxes	`AccrualForTaxesOtherThanIncomeTaxesCurrent`	$39.34M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$15.85M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$16.17M	USD	Point-in-time
Deferred purchased gas costs	`DeferredGasPurchasesCurrent`	$126.30M	USD	Point-in-time
Deferred purchased gas costs	`DeferredGasPurchasesCurrent`	$45.60M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$150.03M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$146.65M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$582.72M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$535.04M	USD	Point-in-time
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndUnamortizedInvestmentTaxCredits`	$817.86M	USD	Point-in-time
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndUnamortizedInvestmentTaxCredits`	$769.45M	USD	Point-in-time
Accumulated removal costs	`OtherAccruedLiabilitiesNoncurrent`	$306.00M	USD	Point-in-time
Accumulated removal costs	`OtherAccruedLiabilitiesNoncurrent`	$303.00M	USD	Point-in-time
Other deferred credits and other long-term liabilities	`DeferredCreditsAndOtherLiabilitiesNoncurrent`	$575.15M	USD	Point-in-time
Other deferred credits and other long-term liabilities	`DeferredCreditsAndOtherLiabilitiesNoncurrent`	$591.56M	USD	Point-in-time
Total deferred income taxes and other credits	`OtherLiabilitiesNoncurrent`	$1.66B	USD	Point-in-time
Total deferred income taxes and other credits	`OtherLiabilitiesNoncurrent`	$1.70B	USD	Point-in-time
Total capitalization and liabilities	`LiabilitiesAndStockholdersEquity`	$5.36B	USD	Point-in-time
Total capitalization and liabilities	`LiabilitiesAndStockholdersEquity`	$5.37B	USD	Point-in-time

Income Statement 138 line items

Line Item	Tag	Value	Unit	Period
Gas operating revenues	`RegulatedOperatingRevenueGas`	$780.75M	USD	2 Qtrs
Gas operating revenues	`RegulatedOperatingRevenueGas`	$255.65M	USD	1 Quarter
Gas operating revenues	`RegulatedOperatingRevenueGas`	$1.46B	USD	Annual
Gas operating revenues	`RegulatedOperatingRevenueGas`	$1.40B	USD	Annual
Gas operating revenues	`RegulatedOperatingRevenueGas`	$286.64M	USD	1 Quarter
Gas operating revenues	`RegulatedOperatingRevenueGas`	$839.76M	USD	2 Qtrs
Construction revenues	`ConstructionRevenue`	$251.96M	USD	1 Quarter
Construction revenues	`ConstructionRevenue`	$1.07B	USD	Annual
Construction revenues	`ConstructionRevenue`	$292.10M	USD	1 Quarter
Construction revenues	`ConstructionRevenue`	$498.25M	USD	2 Qtrs
Construction revenues	`ConstructionRevenue`	$869.11M	USD	Annual
Construction revenues	`ConstructionRevenue`	$433.07M	USD	2 Qtrs
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$1.27B	USD	2 Qtrs
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$1.28B	USD	2 Qtrs
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$2.47B	USD	Annual
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$2.33B	USD	Annual
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$547.75M	USD	1 Quarter
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$538.60M	USD	1 Quarter
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$71.42M	USD	1 Quarter
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$578.77M	USD	Annual
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$362.78M	USD	2 Qtrs
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$109.02M	USD	1 Quarter
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$285.02M	USD	2 Qtrs
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$486.05M	USD	Annual
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$378.56M	USD	Annual
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$99.34M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$98.74M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$199.54M	USD	2 Qtrs
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$194.85M	USD	2 Qtrs
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$397.89M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$134.42M	USD	2 Qtrs
Depreciation and amortization	`DepreciationAndAmortization`	$66.95M	USD	1 Quarter
Depreciation and amortization	`DepreciationAndAmortization`	$72.56M	USD	1 Quarter
Depreciation and amortization	`DepreciationAndAmortization`	$147.92M	USD	2 Qtrs
Depreciation and amortization	`DepreciationAndAmortization`	$262.37M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$283.61M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$50.24M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$25.41M	USD	2 Qtrs
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$12.99M	USD	1 Quarter
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$50.98M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$27.00M	USD	2 Qtrs
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$12.41M	USD	1 Quarter
Construction expenses	`ConstructionAndDevelopmentCosts`	$225.83M	USD	1 Quarter
Construction expenses	`ConstructionAndDevelopmentCosts`	$263.93M	USD	1 Quarter
Construction expenses	`ConstructionAndDevelopmentCosts`	$777.77M	USD	Annual
Construction expenses	`ConstructionAndDevelopmentCosts`	$955.33M	USD	Annual
Construction expenses	`ConstructionAndDevelopmentCosts`	$457.31M	USD	2 Qtrs
Construction expenses	`ConstructionAndDevelopmentCosts`	$400.76M	USD	2 Qtrs
Total operating expenses	`CostsAndExpenses`	$519.63M	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$2.17B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$2.05B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$1.12B	USD	2 Qtrs
Total operating expenses	`CostsAndExpenses`	$1.12B	USD	2 Qtrs
Total operating expenses	`CostsAndExpenses`	$513.56M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$28.12M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$285.27M	USD	Annual
Operating income	`OperatingIncomeLoss`	$25.05M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$295.94M	USD	Annual
Operating income	`OperatingIncomeLoss`	$154.60M	USD	2 Qtrs
Operating income	`OperatingIncomeLoss`	$162.21M	USD	2 Qtrs
Net interest deductions	`InterestExpense`	$72.13M	USD	Annual
Net interest deductions	`InterestExpense`	$72.94M	USD	Annual
Net interest deductions	`InterestExpense`	$18.22M	USD	1 Quarter
Net interest deductions	`InterestExpense`	$35.69M	USD	2 Qtrs
Net interest deductions	`InterestExpense`	$17.72M	USD	1 Quarter
Net interest deductions	`InterestExpense`	$35.94M	USD	2 Qtrs
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$4.64M	USD	Annual
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$2.43M	USD	2 Qtrs
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$5.07M	USD	Annual
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$4.19M	USD	2 Qtrs
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$162.00K	USD	1 Quarter
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$2.47M	USD	1 Quarter
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-67.87M	USD	Annual
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-31.75M	USD	2 Qtrs
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-17.55M	USD	1 Quarter
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-67.49M	USD	Annual
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-33.26M	USD	2 Qtrs
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-15.75M	USD	1 Quarter
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$12.37M	USD	1 Quarter
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$130.46M	USD	2 Qtrs
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$217.39M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$121.34M	USD	2 Qtrs
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$228.45M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$7.49M	USD	1 Quarter
Income tax expense	`IncomeTaxExpenseBenefit`	$2.43M	USD	1 Quarter
Income tax expense	`IncomeTaxExpenseBenefit`	$3.27M	USD	1 Quarter
Income tax expense	`IncomeTaxExpenseBenefit`	$81.51M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$46.01M	USD	2 Qtrs
Income tax expense	`IncomeTaxExpenseBenefit`	$79.63M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$44.40M	USD	2 Qtrs
Net income	`ProfitLoss`	$76.94M	USD	2 Qtrs
Net income	`ProfitLoss`	$137.77M	USD	Annual
Net income	`ProfitLoss`	$146.94M	USD	Annual
Net income	`ProfitLoss`	$84.45M	USD	2 Qtrs
Net income	`ProfitLoss`	$5.06M	USD	1 Quarter
Net income	`ProfitLoss`	$9.10M	USD	1 Quarter
Net income (loss) attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.17M	USD	Annual
Net income (loss) attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$65.00K	USD	2 Qtrs
Net income (loss) attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$118.00K	USD	Annual
Net income (loss) attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$114.00K	USD	1 Quarter
Net income (loss) attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$10.00K	USD	2 Qtrs
Net income (loss) attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$156.00K	USD	1 Quarter
Net income attributable to Southwest Gas Corporation	`NetIncomeLoss`	$4.95M	USD	1 Quarter
Net income attributable to Southwest Gas Corporation	`NetIncomeLoss`	$76.93M	USD	2 Qtrs
Net income attributable to Southwest Gas Corporation	`NetIncomeLoss`	$84.39M	USD	2 Qtrs
Net income attributable to Southwest Gas Corporation	`NetIncomeLoss`	$8.94M	USD	1 Quarter
Net income attributable to Southwest Gas Corporation	`NetIncomeLoss`	$145.77M	USD	Annual
Net income attributable to Southwest Gas Corporation	`NetIncomeLoss`	$137.65M	USD	Annual
Basic earnings per share	`EarningsPerShareBasic`	$3.08	USD	Annual
Basic earnings per share	`EarningsPerShareBasic`	$0.19	USD	1 Quarter
Basic earnings per share	`EarningsPerShareBasic`	$1.78	USD	2 Qtrs
Basic earnings per share	`EarningsPerShareBasic`	$2.95	USD	Annual
Basic earnings per share	`EarningsPerShareBasic`	$0.11	USD	1 Quarter
Basic earnings per share	`EarningsPerShareBasic`	$1.65	USD	2 Qtrs
Diluted earnings per share	`EarningsPerShareDiluted`	$0.19	USD	1 Quarter
Diluted earnings per share	`EarningsPerShareDiluted`	$1.77	USD	2 Qtrs
Diluted earnings per share	`EarningsPerShareDiluted`	$3.06	USD	Annual
Diluted earnings per share	`EarningsPerShareDiluted`	$2.92	USD	Annual
Diluted earnings per share	`EarningsPerShareDiluted`	$0.10	USD	1 Quarter
Diluted earnings per share	`EarningsPerShareDiluted`	$1.63	USD	2 Qtrs
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$1.71	USD	Annual
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$0.90	USD	2 Qtrs
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$0.81	USD	2 Qtrs
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$0.41	USD	1 Quarter
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$0.45	USD	1 Quarter
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$1.54	USD	Annual
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	47.47M	shares	1 Quarter
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	46.74M	shares	2 Qtrs
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	47.35M	shares	Annual
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	46.63M	shares	Annual
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	46.87M	shares	1 Quarter
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	47.45M	shares	2 Qtrs
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.81M	shares	1 Quarter
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.07M	shares	Annual
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.79M	shares	2 Qtrs
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.69M	shares	Annual
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.29M	shares	1 Quarter
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.16M	shares	2 Qtrs

Cash Flow Statement 158 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$137.77M	USD	Annual
Net income	`ProfitLoss`	$146.94M	USD	Annual
Net income	`ProfitLoss`	$84.45M	USD	2 Qtrs
Net income	`ProfitLoss`	$5.06M	USD	1 Quarter
Net income	`ProfitLoss`	$9.10M	USD	1 Quarter
Net income	`ProfitLoss`	$76.94M	USD	2 Qtrs
Depreciation and amortization	`DepreciationAndAmortization`	$134.42M	USD	2 Qtrs
Depreciation and amortization	`DepreciationAndAmortization`	$72.56M	USD	1 Quarter
Depreciation and amortization	`DepreciationAndAmortization`	$66.95M	USD	1 Quarter
Depreciation and amortization	`DepreciationAndAmortization`	$283.61M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$147.92M	USD	2 Qtrs
Depreciation and amortization	`DepreciationAndAmortization`	$262.37M	USD	Annual
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$-3.90M	USD	2 Qtrs
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$-90.81M	USD	Annual
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$-45.92M	USD	2 Qtrs
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$-43.71M	USD	Annual
Accounts receivable, net of allowances	`IncreaseDecreaseInAccountsReceivable`	$-7.04M	USD	Annual
Accounts receivable, net of allowances	`IncreaseDecreaseInAccountsReceivable`	$-52.91M	USD	2 Qtrs
Accounts receivable, net of allowances	`IncreaseDecreaseInAccountsReceivable`	$-6.02M	USD	2 Qtrs
Accounts receivable, net of allowances	`IncreaseDecreaseInAccountsReceivable`	$33.66M	USD	Annual
Accrued utility revenue	`IncreaseDecreaseInUnbilledReceivables`	$-42.10M	USD	2 Qtrs
Accrued utility revenue	`IncreaseDecreaseInUnbilledReceivables`	$700.00K	USD	Annual
Accrued utility revenue	`IncreaseDecreaseInUnbilledReceivables`	$200.00K	USD	Annual
Accrued utility revenue	`IncreaseDecreaseInUnbilledReceivables`	$-42.20M	USD	2 Qtrs
Deferred purchased gas costs	`IncreaseDecreaseInDeferredGasCost`	$-102.83M	USD	Annual
Deferred purchased gas costs	`IncreaseDecreaseInDeferredGasCost`	$-84.29M	USD	2 Qtrs
Deferred purchased gas costs	`IncreaseDecreaseInDeferredGasCost`	$-103.91M	USD	Annual
Deferred purchased gas costs	`IncreaseDecreaseInDeferredGasCost`	$-111.02M	USD	2 Qtrs
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$1.62M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-33.36M	USD	2 Qtrs
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$11.70M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-38.47M	USD	2 Qtrs
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-12.12M	USD	2 Qtrs
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-1.16M	USD	Annual
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$7.61M	USD	2 Qtrs
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-28.14M	USD	Annual
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-18.93M	USD	Annual
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-5.79M	USD	2 Qtrs
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-5.16M	USD	2 Qtrs
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$17.70M	USD	Annual
Gains on sale	`GainLossOnSaleOfPropertyPlantEquipment`	$2.74M	USD	2 Qtrs
Gains on sale	`GainLossOnSaleOfPropertyPlantEquipment`	$4.60M	USD	Annual
Gains on sale	`GainLossOnSaleOfPropertyPlantEquipment`	$3.28M	USD	Annual
Gains on sale	`GainLossOnSaleOfPropertyPlantEquipment`	$2.56M	USD	2 Qtrs
Changes in undistributed stock compensation	`ShareBasedCompensation`	$4.92M	USD	Annual
Changes in undistributed stock compensation	`ShareBasedCompensation`	$5.72M	USD	Annual
Changes in undistributed stock compensation	`ShareBasedCompensation`	$1.51M	USD	2 Qtrs
Changes in undistributed stock compensation	`ShareBasedCompensation`	$3.51M	USD	2 Qtrs
AFUDC	`IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction`	$3.16M	USD	Annual
AFUDC	`IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction`	$1.28M	USD	2 Qtrs
AFUDC	`IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction`	$2.10M	USD	Annual
AFUDC	`IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction`	$1.13M	USD	2 Qtrs
Changes in other assets and deferred charges	`IncreaseDecreaseInOtherOperatingAssets`	$15.24M	USD	2 Qtrs
Changes in other assets and deferred charges	`IncreaseDecreaseInOtherOperatingAssets`	$-223.00K	USD	2 Qtrs
Changes in other assets and deferred charges	`IncreaseDecreaseInOtherOperatingAssets`	$-1.30M	USD	Annual
Changes in other assets and deferred charges	`IncreaseDecreaseInOtherOperatingAssets`	$21.82M	USD	Annual
Changes in other liabilities and deferred credits	`IncreaseDecreaseInOtherOperatingLiabilities`	$2.95M	USD	2 Qtrs
Changes in other liabilities and deferred credits	`IncreaseDecreaseInOtherOperatingLiabilities`	$-2.50M	USD	2 Qtrs
Changes in other liabilities and deferred credits	`IncreaseDecreaseInOtherOperatingLiabilities`	$-729.00K	USD	Annual
Changes in other liabilities and deferred credits	`IncreaseDecreaseInOtherOperatingLiabilities`	$5.41M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$628.12M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$334.24M	USD	2 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$483.21M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$415.21M	USD	2 Qtrs
Construction expenditures and property additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$203.64M	USD	2 Qtrs
Construction expenditures and property additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$549.23M	USD	Annual
Construction expenditures and property additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$425.09M	USD	Annual
Construction expenditures and property additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$264.87M	USD	2 Qtrs
Acquisition of businesses, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$199.76M	USD	Annual
Acquisition of businesses, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$9.26M	USD	2 Qtrs
Acquisition of businesses, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$17.00M	USD	2 Qtrs
Acquisition of businesses, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$17.00M	USD	Annual
Restricted cash	`IncreaseDecreaseInRestrictedCash`	$-785.00K	USD	2 Qtrs
Restricted cash	`IncreaseDecreaseInRestrictedCash`	-	USD	2 Qtrs
Restricted cash	`IncreaseDecreaseInRestrictedCash`	-	USD	Annual
Restricted cash	`IncreaseDecreaseInRestrictedCash`	$-18.67M	USD	Annual
Changes in customer advances	`IncreaseDecreaseInCustomerAdvances`	$10.76M	USD	Annual
Changes in customer advances	`IncreaseDecreaseInCustomerAdvances`	$21.11M	USD	Annual
Changes in customer advances	`IncreaseDecreaseInCustomerAdvances`	$9.69M	USD	2 Qtrs
Changes in customer advances	`IncreaseDecreaseInCustomerAdvances`	$2.15M	USD	2 Qtrs
Miscellaneous inflows	`ProceedsFromMiscellaneousInvestingActivities`	$4.13M	USD	2 Qtrs
Miscellaneous inflows	`ProceedsFromMiscellaneousInvestingActivities`	$7.59M	USD	Annual
Miscellaneous inflows	`ProceedsFromMiscellaneousInvestingActivities`	$4.89M	USD	2 Qtrs
Miscellaneous inflows	`ProceedsFromMiscellaneousInvestingActivities`	$9.44M	USD	Annual
Miscellaneous outflows	`PaymentsForMiscellaneousInvestingActivities`	-	USD	2 Qtrs
Miscellaneous outflows	`PaymentsForMiscellaneousInvestingActivities`	-	USD	Annual
Miscellaneous outflows	`PaymentsForMiscellaneousInvestingActivities`	-	USD	2 Qtrs
Miscellaneous outflows	`PaymentsForMiscellaneousInvestingActivities`	$1.40M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-275.59M	USD	2 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-547.88M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-577.04M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-197.53M	USD	2 Qtrs
Issuance of common stock, net	`ProceedsFromIssuanceOfCommonStock`	$20.88M	USD	Annual
Issuance of common stock, net	`ProceedsFromIssuanceOfCommonStock`	$487.00K	USD	2 Qtrs
Issuance of common stock, net	`ProceedsFromIssuanceOfCommonStock`	$20.71M	USD	2 Qtrs
Issuance of common stock, net	`ProceedsFromIssuanceOfCommonStock`	$15.17M	USD	Annual
Dividends paid	`PaymentsOfDividendsCommonStock`	$78.83M	USD	Annual
Dividends paid	`PaymentsOfDividendsCommonStock`	$69.96M	USD	Annual
Dividends paid	`PaymentsOfDividendsCommonStock`	$36.00M	USD	2 Qtrs
Dividends paid	`PaymentsOfDividendsCommonStock`	$40.58M	USD	2 Qtrs
Centuri distribution to redeemable noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	$99.00K	USD	2 Qtrs
Centuri distribution to redeemable noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	-	USD	Annual
Centuri distribution to redeemable noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	-	USD	2 Qtrs
Centuri distribution to redeemable noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	$198.00K	USD	Annual
Issuance of long-term debt, net	`ProceedsFromIssuanceOfLongTermDebt`	$344.67M	USD	Annual
Issuance of long-term debt, net	`ProceedsFromIssuanceOfLongTermDebt`	$93.17M	USD	2 Qtrs
Issuance of long-term debt, net	`ProceedsFromIssuanceOfLongTermDebt`	$96.13M	USD	2 Qtrs
Issuance of long-term debt, net	`ProceedsFromIssuanceOfLongTermDebt`	$138.78M	USD	Annual
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$52.97M	USD	2 Qtrs
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$162.53M	USD	Annual
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$78.41M	USD	2 Qtrs
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$206.85M	USD	Annual
Change in credit facility and commercial paper	`ProceedsFromRepaymentsOfLinesOfCreditAndCommercialPaper`	$-120.00M	USD	2 Qtrs
Change in credit facility and commercial paper	`ProceedsFromRepaymentsOfLinesOfCreditAndCommercialPaper`	$-27.50M	USD	Annual
Change in credit facility and commercial paper	`ProceedsFromRepaymentsOfLinesOfCreditAndCommercialPaper`	$-147.50M	USD	2 Qtrs
Change in credit facility and commercial paper	`ProceedsFromRepaymentsOfLinesOfCreditAndCommercialPaper`	$30.00M	USD	Annual
Change in short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	-	USD	Annual
Change in short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	-	USD	Annual
Change in short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	$-18.00M	USD	2 Qtrs
Change in short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	$-5.00M	USD	2 Qtrs
Principal payments on capital lease obligations	`RepaymentsOfDebtAndCapitalLeaseObligations`	$1.53M	USD	Annual
Principal payments on capital lease obligations	`RepaymentsOfDebtAndCapitalLeaseObligations`	$1.16M	USD	Annual
Principal payments on capital lease obligations	`RepaymentsOfDebtAndCapitalLeaseObligations`	$835.00K	USD	2 Qtrs
Principal payments on capital lease obligations	`RepaymentsOfDebtAndCapitalLeaseObligations`	$722.00K	USD	2 Qtrs
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-124.00K	USD	2 Qtrs
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-1.32M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$451.00K	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-534.00K	USD	2 Qtrs
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$-163.49M	USD	2 Qtrs
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$116.27M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$-116.19M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$-126.79M	USD	2 Qtrs
Effects of currency translation on cash and cash equivalents	`EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations`	$-832.00K	USD	Annual
Effects of currency translation on cash and cash equivalents	`EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations`	$-570.00K	USD	2 Qtrs
Effects of currency translation on cash and cash equivalents	`EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations`	$5.00K	USD	2 Qtrs
Effects of currency translation on cash and cash equivalents	`EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations`	$-428.00K	USD	Annual
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-23.87M	USD	2 Qtrs
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$9.34M	USD	2 Qtrs
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$22.02M	USD	Annual
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-36.78M	USD	Annual
Cash and cash equivalents at beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$36.00M	USD	Point-in-time
Cash and cash equivalents at beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$12.13M	USD	Point-in-time
Cash and cash equivalents at beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$39.57M	USD	Point-in-time
Cash and cash equivalents at beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$26.89M	USD	Point-in-time
Cash and cash equivalents at beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$48.91M	USD	Point-in-time
Cash and cash equivalents at end of period	`CashAndCashEquivalentsAtCarryingValue`	$48.91M	USD	Point-in-time
Cash and cash equivalents at end of period	`CashAndCashEquivalentsAtCarryingValue`	$36.00M	USD	Point-in-time
Cash and cash equivalents at end of period	`CashAndCashEquivalentsAtCarryingValue`	$12.13M	USD	Point-in-time
Cash and cash equivalents at end of period	`CashAndCashEquivalentsAtCarryingValue`	$39.57M	USD	Point-in-time
Cash and cash equivalents at end of period	`CashAndCashEquivalentsAtCarryingValue`	$26.89M	USD	Point-in-time
Interest paid, net of amounts capitalized	`InterestPaidNet`	$33.22M	USD	2 Qtrs
Interest paid, net of amounts capitalized	`InterestPaidNet`	$67.98M	USD	Annual
Interest paid, net of amounts capitalized	`InterestPaidNet`	$65.63M	USD	Annual
Interest paid, net of amounts capitalized	`InterestPaidNet`	$34.21M	USD	2 Qtrs
Income taxes paid	`IncomeTaxesPaid`	$28.48M	USD	2 Qtrs
Income taxes paid	`IncomeTaxesPaid`	$19.48M	USD	Annual
Income taxes paid	`IncomeTaxesPaid`	$4.74M	USD	2 Qtrs
Income taxes paid	`IncomeTaxesPaid`	$40.48M	USD	Annual

Stockholders Equity 84 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$137.77M	USD	Annual
Net income	`ProfitLoss`	$146.94M	USD	Annual
Net income	`ProfitLoss`	$84.45M	USD	2 Qtrs
Net income	`ProfitLoss`	$5.06M	USD	1 Quarter
Net income	`ProfitLoss`	$9.10M	USD	1 Quarter
Net income	`ProfitLoss`	$76.94M	USD	2 Qtrs
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-18.92M	USD	Annual
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	2 Qtrs
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	2 Qtrs
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-107.66M	USD	Annual
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$524.00K	USD	Annual
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$208.00K	USD	1 Quarter
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$414.00K	USD	2 Qtrs
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$828.00K	USD	Annual
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$414.00K	USD	2 Qtrs
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$207.00K	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-4.19M	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-17.99M	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-19.05M	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-8.39M	USD	2 Qtrs
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-5.33M	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-10.66M	USD	2 Qtrs
Prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	$4.13M	USD	Annual
Prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	2 Qtrs
Prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	2 Qtrs
Prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
Prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$1.44M	USD	Annual
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$7.59M	USD	2 Qtrs
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$3.80M	USD	1 Quarter
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$4.83M	USD	1 Quarter
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$9.66M	USD	2 Qtrs
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$-83.75M	USD	Annual
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$482.00K	USD	Annual
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-1.42M	USD	2 Qtrs
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-708.00K	USD	1 Quarter
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-605.00K	USD	1 Quarter
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-1.21M	USD	2 Qtrs
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$9.52M	USD	Annual
Amounts reclassified into net income	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax`	$-2.07M	USD	Annual
Amounts reclassified into net income	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax`	$-1.04M	USD	2 Qtrs
Amounts reclassified into net income	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax`	$-519.00K	USD	1 Quarter
Amounts reclassified into net income	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax`	$-518.00K	USD	1 Quarter
Amounts reclassified into net income	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax`	$-1.04M	USD	2 Qtrs
Amounts reclassified into net income	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax`	$-2.07M	USD	Annual
Net forward-starting interest rate swaps	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$519.00K	USD	1 Quarter
Net forward-starting interest rate swaps	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$2.07M	USD	Annual
Net forward-starting interest rate swaps	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$2.07M	USD	Annual
Net forward-starting interest rate swaps	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$1.04M	USD	2 Qtrs
Net forward-starting interest rate swaps	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$518.00K	USD	1 Quarter
Net forward-starting interest rate swaps	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$1.04M	USD	2 Qtrs
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-1.72M	USD	Annual
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-1.06M	USD	2 Qtrs
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$209.00K	USD	1 Quarter
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$852.00K	USD	2 Qtrs
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-39.00K	USD	Annual
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$70.00K	USD	1 Quarter
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-9.17M	USD	Annual
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$1.44M	USD	1 Quarter
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$1.19M	USD	1 Quarter
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$1.39M	USD	2 Qtrs
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$3.10M	USD	2 Qtrs
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$1.55M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$128.60M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$87.56M	USD	2 Qtrs
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$148.50M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$78.33M	USD	2 Qtrs
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$6.50M	USD	1 Quarter
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$10.29M	USD	1 Quarter
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$122.00K	USD	1 Quarter
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$1.17M	USD	Annual
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$94.00K	USD	2 Qtrs
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-25.00K	USD	2 Qtrs
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$61.00K	USD	Annual
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$159.00K	USD	1 Quarter
Comprehensive income attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$10.13M	USD	1 Quarter
Comprehensive income attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$147.33M	USD	Annual
Comprehensive income attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$78.36M	USD	2 Qtrs
Comprehensive income attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$6.38M	USD	1 Quarter
Comprehensive income attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$87.46M	USD	2 Qtrs
Comprehensive income attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$128.54M	USD	Annual

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