10-Q Filing

SOUTHWEST GAS CORP CIK: 92416 Q3 2016

Filing Information

Form Type	10-Q
Accession Number	`0001193125-16-762846`
Period End Date	20160930
Filing Date	20161108
Fiscal Year	2016
Fiscal Period	Q3
XBRL Instance	swx-20160930.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
Gas plant	`PublicUtilitiesPropertyPlantAndEquipmentPlantInService`	$5.85B	USD	Point-in-time
Gas plant	`PublicUtilitiesPropertyPlantAndEquipmentPlantInService`	$6.12B	USD	Point-in-time
Common stock, issued	`CommonStockSharesIssued`	47.48M	shares	Point-in-time
Common stock, issued	`CommonStockSharesIssued`	47.38M	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`	$2.16B	USD	Point-in-time
Common stock, outstanding	`CommonStockSharesOutstanding`	47.48M	shares	Point-in-time
Acquisition adjustments, net	`PublicUtilitiesPropertyPlantAndEquipmentAmountOfAcquisitionAdjustments1`	$234.00K	USD	Point-in-time
Acquisition adjustments, net	`PublicUtilitiesPropertyPlantAndEquipmentAmountOfAcquisitionAdjustments1`	$370.00K	USD	Point-in-time
Construction work in progress	`PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress`	$105.85M	USD	Point-in-time
Construction work in progress	`PublicUtilitiesPropertyPlantAndEquipmentConstructionWorkInProgress`	$119.81M	USD	Point-in-time
Net utility plant	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$4.07B	USD	Point-in-time
Net utility plant	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$3.89B	USD	Point-in-time
Other property and investments	`OtherPropertyAndInvestments`	$348.56M	USD	Point-in-time
Other property and investments	`OtherPropertyAndInvestments`	$313.53M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$85.15M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$39.16M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$36.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$39.57M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$32.96M	USD	Point-in-time
Accounts receivable, net of allowances	`AccountsReceivableNetCurrent`	$314.51M	USD	Point-in-time
Accounts receivable, net of allowances	`AccountsReceivableNetCurrent`	$286.70M	USD	Point-in-time
Accrued utility revenue	`AccruedUtilityRevenue`	$33.00M	USD	Point-in-time
Accrued utility revenue	`AccruedUtilityRevenue`	$74.70M	USD	Point-in-time
Income taxes receivable, net	`IncomeTaxesReceivable`	$38.37M	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`	$101.08M	USD	Point-in-time
Prepaids and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$95.20M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$544.30M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$558.17M	USD	Point-in-time
Goodwill	`Goodwill`	$126.14M	USD	Point-in-time
Goodwill	`Goodwill`	$142.44M	USD	Point-in-time
Deferred income taxes	`DeferredTaxAssetsNetNoncurrent`	$783.00K	USD	Point-in-time
Deferred income taxes	`DeferredTaxAssetsNetNoncurrent`	$428.00K	USD	Point-in-time
Deferred charges and other assets	`OtherAssetsNoncurrent`	$429.83M	USD	Point-in-time
Deferred charges and other assets	`OtherAssetsNoncurrent`	$469.32M	USD	Point-in-time
Total noncurrent assets	`AssetsNoncurrent`	$595.89M	USD	Point-in-time
Total noncurrent assets	`AssetsNoncurrent`	$573.05M	USD	Point-in-time
Total assets	`Assets`	$5.53B	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 - 47,482,068 and 47,377,575 shares)	`CommonStockValue`	$49.01M	USD	Point-in-time
Common stock, $1 par (authorized - 60,000,000 shares; issued and outstanding - 47,482,068 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`	$901.97M	USD	Point-in-time
Accumulated other comprehensive income (loss), net	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-46.30M	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`	$720.40M	USD	Point-in-time
Total Southwest Gas Corporation equity	`StockholdersEquity`	$1.59B	USD	Point-in-time
Total Southwest Gas Corporation equity	`StockholdersEquity`	$1.63B	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$-2.08M	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$-2.26M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.62B	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`	$17.38M	USD	Point-in-time
Long-term debt, less current maturities	`LongTermDebtNoncurrent`	$1.59B	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`	$3.23B	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$49.48M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$19.48M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	-	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$18.00M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$138.81M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$164.86M	USD	Point-in-time
Customer deposits	`CustomerDepositsCurrent`	$72.04M	USD	Point-in-time
Customer deposits	`CustomerDepositsCurrent`	$72.63M	USD	Point-in-time
Income taxes payable	`IncomeTaxesPayable`	$940.00K	USD	Point-in-time
Income taxes payable	`IncomeTaxesPayable`	$219.00K	USD	Point-in-time
Accrued general taxes	`AccrualForTaxesOtherThanIncomeTaxesCurrent`	$46.32M	USD	Point-in-time
Accrued general taxes	`AccrualForTaxesOtherThanIncomeTaxesCurrent`	$47.34M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$16.17M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$20.15M	USD	Point-in-time
Deferred purchased gas costs	`DeferredGasPurchasesCurrent`	$45.60M	USD	Point-in-time
Deferred purchased gas costs	`DeferredGasPurchasesCurrent`	$123.40M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$150.03M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$162.62M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$535.04M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$613.04M	USD	Point-in-time
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndUnamortizedInvestmentTaxCredits`	$769.45M	USD	Point-in-time
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndUnamortizedInvestmentTaxCredits`	$814.98M	USD	Point-in-time
Accumulated removal costs	`OtherAccruedLiabilitiesNoncurrent`	$305.00M	USD	Point-in-time
Accumulated removal costs	`OtherAccruedLiabilitiesNoncurrent`	$303.00M	USD	Point-in-time
Other deferred credits and other long-term liabilities	`DeferredCreditsAndOtherLiabilitiesNoncurrent`	$566.53M	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`	$1.69B	USD	Point-in-time
Total capitalization and liabilities	`LiabilitiesAndStockholdersEquity`	$5.53B	USD	Point-in-time
Total capitalization and liabilities	`LiabilitiesAndStockholdersEquity`	$5.36B	USD	Point-in-time

Income Statement 138 line items

Line Item	Tag	Value	Unit	Period
Gas operating revenues	`RegulatedOperatingRevenueGas`	$1.06B	USD	3 Qtrs
Gas operating revenues	`RegulatedOperatingRevenueGas`	$1.46B	USD	Annual
Gas operating revenues	`RegulatedOperatingRevenueGas`	$1.38B	USD	Annual
Gas operating revenues	`RegulatedOperatingRevenueGas`	$219.42M	USD	1 Quarter
Gas operating revenues	`RegulatedOperatingRevenueGas`	$200.18M	USD	1 Quarter
Gas operating revenues	`RegulatedOperatingRevenueGas`	$980.93M	USD	3 Qtrs
Construction revenues	`ConstructionRevenue`	$1.13B	USD	Annual
Construction revenues	`ConstructionRevenue`	$719.04M	USD	3 Qtrs
Construction revenues	`ConstructionRevenue`	$838.04M	USD	3 Qtrs
Construction revenues	`ConstructionRevenue`	$285.98M	USD	1 Quarter
Construction revenues	`ConstructionRevenue`	$339.79M	USD	1 Quarter
Construction revenues	`ConstructionRevenue`	$948.64M	USD	Annual
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$1.78B	USD	3 Qtrs
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$2.41B	USD	Annual
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$505.40M	USD	1 Quarter
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$1.82B	USD	3 Qtrs
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$539.97M	USD	1 Quarter
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$2.50B	USD	Annual
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$64.27M	USD	1 Quarter
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$39.06M	USD	1 Quarter
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$460.84M	USD	Annual
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$570.05M	USD	Annual
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$427.05M	USD	3 Qtrs
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$324.07M	USD	3 Qtrs
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$294.96M	USD	3 Qtrs
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$400.22M	USD	Annual
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$100.10M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$385.27M	USD	Annual
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$102.44M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$301.98M	USD	3 Qtrs
Depreciation and amortization	`DepreciationAndAmortization`	$266.81M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$66.48M	USD	1 Quarter
Depreciation and amortization	`DepreciationAndAmortization`	$286.98M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$69.84M	USD	1 Quarter
Depreciation and amortization	`DepreciationAndAmortization`	$200.90M	USD	3 Qtrs
Depreciation and amortization	`DepreciationAndAmortization`	$217.76M	USD	3 Qtrs
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$50.06M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$39.48M	USD	3 Qtrs
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$11.65M	USD	1 Quarter
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$37.06M	USD	3 Qtrs
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$51.81M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$12.48M	USD	1 Quarter
Construction expenses	`ConstructionAndDevelopmentCosts`	$1.01B	USD	Annual
Construction expenses	`ConstructionAndDevelopmentCosts`	$246.75M	USD	1 Quarter
Construction expenses	`ConstructionAndDevelopmentCosts`	$647.51M	USD	3 Qtrs
Construction expenses	`ConstructionAndDevelopmentCosts`	$300.61M	USD	1 Quarter
Construction expenses	`ConstructionAndDevelopmentCosts`	$850.59M	USD	Annual
Construction expenses	`ConstructionAndDevelopmentCosts`	$757.92M	USD	3 Qtrs
Total operating expenses	`CostsAndExpenses`	$1.64B	USD	3 Qtrs
Total operating expenses	`CostsAndExpenses`	$2.12B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$1.61B	USD	3 Qtrs
Total operating expenses	`CostsAndExpenses`	$524.43M	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$489.25M	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$2.21B	USD	Annual
Operating income	`OperatingIncomeLoss`	$283.12M	USD	Annual
Operating income	`OperatingIncomeLoss`	$15.54M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$295.34M	USD	Annual
Operating income	`OperatingIncomeLoss`	$177.75M	USD	3 Qtrs
Operating income	`OperatingIncomeLoss`	$16.14M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$170.75M	USD	3 Qtrs
Net interest deductions	`InterestExpense`	$54.09M	USD	3 Qtrs
Net interest deductions	`InterestExpense`	$54.10M	USD	3 Qtrs
Net interest deductions	`InterestExpense`	$71.88M	USD	Annual
Net interest deductions	`InterestExpense`	$18.16M	USD	1 Quarter
Net interest deductions	`InterestExpense`	$73.92M	USD	Annual
Net interest deductions	`InterestExpense`	$18.40M	USD	1 Quarter
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$6.76M	USD	3 Qtrs
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$10.86M	USD	Annual
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$2.56M	USD	1 Quarter
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$-1.23M	USD	3 Qtrs
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$966.00K	USD	Annual
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$-3.66M	USD	1 Quarter
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-72.95M	USD	Annual
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-55.32M	USD	3 Qtrs
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-22.06M	USD	1 Quarter
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-15.59M	USD	1 Quarter
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-61.02M	USD	Annual
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-47.34M	USD	3 Qtrs
Income (loss) before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$-5.92M	USD	1 Quarter
Income (loss) before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$-54.00K	USD	1 Quarter
Income (loss) before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$115.42M	USD	3 Qtrs
Income (loss) before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$234.31M	USD	Annual
Income (loss) before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$210.17M	USD	Annual
Income (loss) before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$130.41M	USD	3 Qtrs
Income tax expense (benefit)	`IncomeTaxExpenseBenefit`	$-2.96M	USD	1 Quarter
Income tax expense (benefit)	`IncomeTaxExpenseBenefit`	$43.05M	USD	3 Qtrs
Income tax expense (benefit)	`IncomeTaxExpenseBenefit`	$78.54M	USD	Annual
Income tax expense (benefit)	`IncomeTaxExpenseBenefit`	$-1.71M	USD	1 Quarter
Income tax expense (benefit)	`IncomeTaxExpenseBenefit`	$42.69M	USD	3 Qtrs
Income tax expense (benefit)	`IncomeTaxExpenseBenefit`	$80.25M	USD	Annual
Net income (loss)	`ProfitLoss`	$72.73M	USD	3 Qtrs
Net income (loss)	`ProfitLoss`	$87.36M	USD	3 Qtrs
Net income (loss)	`ProfitLoss`	$154.06M	USD	Annual
Net income (loss)	`ProfitLoss`	$2.91M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$-4.21M	USD	1 Quarter
Net income (loss)	`ProfitLoss`	$131.63M	USD	Annual
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$435.00K	USD	1 Quarter
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$500.00K	USD	3 Qtrs
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.08M	USD	Annual
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$685.00K	USD	Annual
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$524.00K	USD	1 Quarter
Net income attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$534.00K	USD	3 Qtrs
Net income (loss) attributable to Southwest Gas Corporation	`NetIncomeLoss`	$86.86M	USD	3 Qtrs
Net income (loss) attributable to Southwest Gas Corporation	`NetIncomeLoss`	$130.94M	USD	Annual
Net income (loss) attributable to Southwest Gas Corporation	`NetIncomeLoss`	$-4.73M	USD	1 Quarter
Net income (loss) attributable to Southwest Gas Corporation	`NetIncomeLoss`	$72.20M	USD	3 Qtrs
Net income (loss) attributable to Southwest Gas Corporation	`NetIncomeLoss`	$152.98M	USD	Annual
Net income (loss) attributable to Southwest Gas Corporation	`NetIncomeLoss`	$2.47M	USD	1 Quarter
Basic earnings (loss) per share	`EarningsPerShareBasic`	$0.05	USD	1 Quarter
Basic earnings (loss) per share	`EarningsPerShareBasic`	$-0.10	USD	1 Quarter
Basic earnings (loss) per share	`EarningsPerShareBasic`	$1.83	USD	3 Qtrs
Basic earnings (loss) per share	`EarningsPerShareBasic`	$3.22	USD	Annual
Basic earnings (loss) per share	`EarningsPerShareBasic`	$2.80	USD	Annual
Basic earnings (loss) per share	`EarningsPerShareBasic`	$1.54	USD	3 Qtrs
Diluted earnings (loss) per share	`EarningsPerShareDiluted`	$0.05	USD	1 Quarter
Diluted earnings (loss) per share	`EarningsPerShareDiluted`	$1.53	USD	3 Qtrs
Diluted earnings (loss) per share	`EarningsPerShareDiluted`	$1.82	USD	3 Qtrs
Diluted earnings (loss) per share	`EarningsPerShareDiluted`	$-0.10	USD	1 Quarter
Diluted earnings (loss) per share	`EarningsPerShareDiluted`	$2.77	USD	Annual
Diluted earnings (loss) per share	`EarningsPerShareDiluted`	$3.20	USD	Annual
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$0.45	USD	1 Quarter
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$1.35	USD	3 Qtrs
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$0.41	USD	1 Quarter
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$1.22	USD	3 Qtrs
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$1.58	USD	Annual
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$1.75	USD	Annual
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	47.46M	shares	3 Qtrs
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	46.86M	shares	3 Qtrs
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	46.78M	shares	Annual
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	47.44M	shares	Annual
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	47.10M	shares	1 Quarter
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	47.48M	shares	1 Quarter
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.26M	shares	3 Qtrs
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.19M	shares	Annual
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.83M	shares	1 Quarter
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	0.00	shares	1 Quarter
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.80M	shares	3 Qtrs
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.79M	shares	Annual

Cash Flow Statement 158 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$87.36M	USD	3 Qtrs
Net income	`ProfitLoss`	$154.06M	USD	Annual
Net income	`ProfitLoss`	$2.91M	USD	1 Quarter
Net income	`ProfitLoss`	$-4.21M	USD	1 Quarter
Net income	`ProfitLoss`	$131.63M	USD	Annual
Net income	`ProfitLoss`	$72.73M	USD	3 Qtrs
Depreciation and amortization	`DepreciationAndAmortization`	$266.81M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$286.98M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$66.48M	USD	1 Quarter
Depreciation and amortization	`DepreciationAndAmortization`	$217.76M	USD	3 Qtrs
Depreciation and amortization	`DepreciationAndAmortization`	$69.84M	USD	1 Quarter
Depreciation and amortization	`DepreciationAndAmortization`	$200.90M	USD	3 Qtrs
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$-5.96M	USD	3 Qtrs
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$-32.58M	USD	Annual
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$-43.70M	USD	3 Qtrs
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$-86.53M	USD	Annual
Accounts receivable, net of allowances	`IncreaseDecreaseInAccountsReceivable`	$-6.57M	USD	3 Qtrs
Accounts receivable, net of allowances	`IncreaseDecreaseInAccountsReceivable`	$-28.53M	USD	3 Qtrs
Accounts receivable, net of allowances	`IncreaseDecreaseInAccountsReceivable`	$17.89M	USD	Annual
Accounts receivable, net of allowances	`IncreaseDecreaseInAccountsReceivable`	$31.79M	USD	Annual
Accrued utility revenue	`IncreaseDecreaseInUnbilledReceivables`	$-41.70M	USD	3 Qtrs
Accrued utility revenue	`IncreaseDecreaseInUnbilledReceivables`	$800.00K	USD	Annual
Accrued utility revenue	`IncreaseDecreaseInUnbilledReceivables`	$200.00K	USD	Annual
Accrued utility revenue	`IncreaseDecreaseInUnbilledReceivables`	$-41.70M	USD	3 Qtrs
Deferred purchased gas costs	`IncreaseDecreaseInDeferredGasCost`	$-81.39M	USD	3 Qtrs
Deferred purchased gas costs	`IncreaseDecreaseInDeferredGasCost`	$-79.46M	USD	Annual
Deferred purchased gas costs	`IncreaseDecreaseInDeferredGasCost`	$-122.26M	USD	Annual
Deferred purchased gas costs	`IncreaseDecreaseInDeferredGasCost`	$-131.50M	USD	3 Qtrs
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$10.45M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$5.14M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-24.94M	USD	3 Qtrs
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-38.88M	USD	3 Qtrs
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-4.43M	USD	3 Qtrs
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-1.13M	USD	Annual
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-11.03M	USD	Annual
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-7.05M	USD	3 Qtrs
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-9.90M	USD	3 Qtrs
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-19.87M	USD	Annual
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-8.33M	USD	3 Qtrs
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$11.94M	USD	Annual
Gains on sale	`GainLossOnSaleOfPropertyPlantEquipment`	$4.12M	USD	3 Qtrs
Gains on sale	`GainLossOnSaleOfPropertyPlantEquipment`	$4.20M	USD	Annual
Gains on sale	`GainLossOnSaleOfPropertyPlantEquipment`	$3.02M	USD	3 Qtrs
Gains on sale	`GainLossOnSaleOfPropertyPlantEquipment`	$3.53M	USD	Annual
Changes in undistributed stock compensation	`ShareBasedCompensation`	$5.48M	USD	Annual
Changes in undistributed stock compensation	`ShareBasedCompensation`	$4.35M	USD	3 Qtrs
Changes in undistributed stock compensation	`ShareBasedCompensation`	$5.14M	USD	Annual
Changes in undistributed stock compensation	`ShareBasedCompensation`	$2.12M	USD	3 Qtrs
AFUDC	`IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction`	$1.89M	USD	3 Qtrs
AFUDC	`IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction`	$2.89M	USD	Annual
AFUDC	`IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction`	$2.01M	USD	3 Qtrs
AFUDC	`IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction`	$2.44M	USD	Annual
Changes in other assets and deferred charges	`IncreaseDecreaseInOtherOperatingAssets`	$-4.18M	USD	Annual
Changes in other assets and deferred charges	`IncreaseDecreaseInOtherOperatingAssets`	$-3.93M	USD	3 Qtrs
Changes in other assets and deferred charges	`IncreaseDecreaseInOtherOperatingAssets`	$18.73M	USD	Annual
Changes in other assets and deferred charges	`IncreaseDecreaseInOtherOperatingAssets`	$14.42M	USD	3 Qtrs
Changes in other liabilities and deferred credits	`IncreaseDecreaseInOtherOperatingLiabilities`	$5.35M	USD	3 Qtrs
Changes in other liabilities and deferred credits	`IncreaseDecreaseInOtherOperatingLiabilities`	$2.78M	USD	Annual
Changes in other liabilities and deferred credits	`IncreaseDecreaseInOtherOperatingLiabilities`	$702.00K	USD	Annual
Changes in other liabilities and deferred credits	`IncreaseDecreaseInOtherOperatingLiabilities`	$-4.81M	USD	3 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$610.55M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$475.80M	USD	3 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$412.40M	USD	3 Qtrs
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$496.92M	USD	Annual
Construction expenditures and property additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$404.39M	USD	3 Qtrs
Construction expenditures and property additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$336.57M	USD	3 Qtrs
Construction expenditures and property additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$555.82M	USD	Annual
Construction expenditures and property additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$440.19M	USD	Annual
Acquisition of businesses, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$9.26M	USD	3 Qtrs
Acquisition of businesses, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$17.00M	USD	3 Qtrs
Acquisition of businesses, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$17.00M	USD	Annual
Acquisition of businesses, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$199.76M	USD	Annual
Restricted cash	`IncreaseDecreaseInRestrictedCash`	$-2.02M	USD	Annual
Restricted cash	`IncreaseDecreaseInRestrictedCash`	-	USD	3 Qtrs
Restricted cash	`IncreaseDecreaseInRestrictedCash`	-	USD	Annual
Restricted cash	`IncreaseDecreaseInRestrictedCash`	$-785.00K	USD	3 Qtrs
Changes in customer advances	`IncreaseDecreaseInCustomerAdvances`	$9.45M	USD	Annual
Changes in customer advances	`IncreaseDecreaseInCustomerAdvances`	$14.30M	USD	3 Qtrs
Changes in customer advances	`IncreaseDecreaseInCustomerAdvances`	$5.45M	USD	3 Qtrs
Changes in customer advances	`IncreaseDecreaseInCustomerAdvances`	$21.54M	USD	Annual
Miscellaneous inflows	`ProceedsFromMiscellaneousInvestingActivities`	$4.73M	USD	Annual
Miscellaneous inflows	`ProceedsFromMiscellaneousInvestingActivities`	$13.42M	USD	Annual
Miscellaneous inflows	`ProceedsFromMiscellaneousInvestingActivities`	$11.59M	USD	3 Qtrs
Miscellaneous inflows	`ProceedsFromMiscellaneousInvestingActivities`	$7.96M	USD	3 Qtrs
Miscellaneous outflows	`PaymentsForMiscellaneousInvestingActivities`	-	USD	Annual
Miscellaneous outflows	`PaymentsForMiscellaneousInvestingActivities`	$1.40M	USD	Annual
Miscellaneous outflows	`PaymentsForMiscellaneousInvestingActivities`	-	USD	3 Qtrs
Miscellaneous outflows	`PaymentsForMiscellaneousInvestingActivities`	-	USD	3 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-558.65M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-407.98M	USD	3 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-319.15M	USD	3 Qtrs
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-604.37M	USD	Annual
Issuance of common stock, net	`ProceedsFromIssuanceOfCommonStock`	$507.00K	USD	Annual
Issuance of common stock, net	`ProceedsFromIssuanceOfCommonStock`	$35.42M	USD	3 Qtrs
Issuance of common stock, net	`ProceedsFromIssuanceOfCommonStock`	$35.41M	USD	Annual
Issuance of common stock, net	`ProceedsFromIssuanceOfCommonStock`	$530.00K	USD	3 Qtrs
Dividends paid	`PaymentsOfDividendsCommonStock`	$61.95M	USD	3 Qtrs
Dividends paid	`PaymentsOfDividendsCommonStock`	$72.04M	USD	Annual
Dividends paid	`PaymentsOfDividendsCommonStock`	$81.14M	USD	Annual
Dividends paid	`PaymentsOfDividendsCommonStock`	$55.06M	USD	3 Qtrs
Centuri distribution to redeemable noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	$198.00K	USD	Annual
Centuri distribution to redeemable noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	-	USD	3 Qtrs
Centuri distribution to redeemable noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	$99.00K	USD	3 Qtrs
Centuri distribution to redeemable noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	-	USD	Annual
Issuance of long-term debt, net	`ProceedsFromIssuanceOfLongTermDebt`	$408.95M	USD	3 Qtrs
Issuance of long-term debt, net	`ProceedsFromIssuanceOfLongTermDebt`	$355.32M	USD	Annual
Issuance of long-term debt, net	`ProceedsFromIssuanceOfLongTermDebt`	$420.95M	USD	Annual
Issuance of long-term debt, net	`ProceedsFromIssuanceOfLongTermDebt`	$123.82M	USD	3 Qtrs
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$196.35M	USD	3 Qtrs
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$143.32M	USD	3 Qtrs
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$241.00M	USD	Annual
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$260.95M	USD	Annual
Change in credit facility and commercial paper	`ProceedsFromRepaymentsOfLinesOfCreditAndCommercialPaper`	$-97.00M	USD	Annual
Change in credit facility and commercial paper	`ProceedsFromRepaymentsOfLinesOfCreditAndCommercialPaper`	$-150.00M	USD	3 Qtrs
Change in credit facility and commercial paper	`ProceedsFromRepaymentsOfLinesOfCreditAndCommercialPaper`	$47.00M	USD	Annual
Change in credit facility and commercial paper	`ProceedsFromRepaymentsOfLinesOfCreditAndCommercialPaper`	$-53.00M	USD	3 Qtrs
Change in short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	$-5.00M	USD	3 Qtrs
Change in short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	-	USD	Annual
Change in short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	$-18.00M	USD	3 Qtrs
Change in short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	-	USD	Annual
Principal payments on capital lease obligations	`RepaymentsOfDebtAndCapitalLeaseObligations`	$1.12M	USD	3 Qtrs
Principal payments on capital lease obligations	`RepaymentsOfDebtAndCapitalLeaseObligations`	$1.45M	USD	Annual
Principal payments on capital lease obligations	`RepaymentsOfDebtAndCapitalLeaseObligations`	$1.10M	USD	3 Qtrs
Principal payments on capital lease obligations	`RepaymentsOfDebtAndCapitalLeaseObligations`	$1.53M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-1.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-605.00K	USD	3 Qtrs
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-60.00K	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-504.00K	USD	3 Qtrs
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$609.00K	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$102.21M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$-98.75M	USD	3 Qtrs
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$-18.65M	USD	3 Qtrs
Effects of currency translation on cash and cash equivalents	`EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations`	$-1.10M	USD	3 Qtrs
Effects of currency translation on cash and cash equivalents	`EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations`	$-318.00K	USD	Annual
Effects of currency translation on cash and cash equivalents	`EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations`	$-14.00K	USD	3 Qtrs
Effects of currency translation on cash and cash equivalents	`EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations`	$-961.00K	USD	Annual
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-6.61M	USD	3 Qtrs
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-6.21M	USD	Annual
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$52.20M	USD	Annual
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$49.16M	USD	3 Qtrs
Cash and cash equivalents at beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$39.57M	USD	Point-in-time
Cash and cash equivalents at beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$32.96M	USD	Point-in-time
Cash and cash equivalents at beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$39.16M	USD	Point-in-time
Cash and cash equivalents at beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$36.00M	USD	Point-in-time
Cash and cash equivalents at beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$85.15M	USD	Point-in-time
Cash and cash equivalents at end of period	`CashAndCashEquivalentsAtCarryingValue`	$85.15M	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`	$32.96M	USD	Point-in-time
Cash and cash equivalents at end of period	`CashAndCashEquivalentsAtCarryingValue`	$39.16M	USD	Point-in-time
Cash and cash equivalents at end of period	`CashAndCashEquivalentsAtCarryingValue`	$36.00M	USD	Point-in-time
Interest paid, net of amounts capitalized	`InterestPaidNet`	$45.31M	USD	3 Qtrs
Interest paid, net of amounts capitalized	`InterestPaidNet`	$47.13M	USD	3 Qtrs
Interest paid, net of amounts capitalized	`InterestPaidNet`	$68.44M	USD	Annual
Interest paid, net of amounts capitalized	`InterestPaidNet`	$68.17M	USD	Annual
Income taxes paid	`IncomeTaxesPaid`	$6.53M	USD	3 Qtrs
Income taxes paid	`IncomeTaxesPaid`	$39.86M	USD	3 Qtrs
Income taxes paid	`IncomeTaxesPaid`	$9.90M	USD	Annual
Income taxes paid	`IncomeTaxesPaid`	$49.28M	USD	Annual

Stockholders Equity 84 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$87.36M	USD	3 Qtrs
Net income	`ProfitLoss`	$154.06M	USD	Annual
Net income	`ProfitLoss`	$2.91M	USD	1 Quarter
Net income	`ProfitLoss`	$-4.21M	USD	1 Quarter
Net income	`ProfitLoss`	$131.63M	USD	Annual
Net income	`ProfitLoss`	$72.73M	USD	3 Qtrs
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	3 Qtrs
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	-	USD	3 Qtrs
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-107.66M	USD	Annual
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-18.92M	USD	Annual
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$207.00K	USD	1 Quarter
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$621.00K	USD	3 Qtrs
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$828.00K	USD	Annual
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$676.00K	USD	Annual
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$621.00K	USD	3 Qtrs
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$207.00K	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-12.59M	USD	3 Qtrs
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-5.33M	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-17.91M	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-19.65M	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-4.20M	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-15.99M	USD	3 Qtrs
Prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	$4.13M	USD	Annual
Prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	3 Qtrs
Prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	Annual
Prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	1 Quarter
Prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	-	USD	3 Qtrs
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$-82.14M	USD	Annual
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$3.80M	USD	1 Quarter
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$11.39M	USD	3 Qtrs
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$404.00K	USD	Annual
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$4.83M	USD	1 Quarter
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$14.48M	USD	3 Qtrs
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-708.00K	USD	1 Quarter
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$9.32M	USD	Annual
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$583.00K	USD	Annual
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-1.82M	USD	3 Qtrs
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-2.12M	USD	3 Qtrs
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-607.00K	USD	1 Quarter
Amounts reclassified into net income	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax`	$-2.07M	USD	Annual
Amounts reclassified into net income	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax`	$-2.07M	USD	Annual
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`	$-1.56M	USD	3 Qtrs
Amounts reclassified into net income	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax`	$-1.56M	USD	3 Qtrs
Net forward-starting interest rate swaps	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$2.07M	USD	Annual
Net forward-starting interest rate swaps	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$1.56M	USD	3 Qtrs
Net forward-starting interest rate swaps	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$2.07M	USD	Annual
Net forward-starting interest rate swaps	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$519.00K	USD	1 Quarter
Net forward-starting interest rate swaps	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$518.00K	USD	1 Quarter
Net forward-starting interest rate swaps	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$1.56M	USD	3 Qtrs
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-510.00K	USD	1 Quarter
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-2.23M	USD	Annual
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-238.00K	USD	1 Quarter
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$233.00K	USD	Annual
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$614.00K	USD	3 Qtrs
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-1.57M	USD	3 Qtrs
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$3.99M	USD	3 Qtrs
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-9.48M	USD	Annual
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$1.72M	USD	Annual
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$717.00K	USD	1 Quarter
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$2.11M	USD	3 Qtrs
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$887.00K	USD	1 Quarter
Comprehensive income (loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$3.79M	USD	1 Quarter
Comprehensive income (loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$155.78M	USD	Annual
Comprehensive income (loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$91.35M	USD	3 Qtrs
Comprehensive income (loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$122.15M	USD	Annual
Comprehensive income (loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$74.84M	USD	3 Qtrs
Comprehensive income (loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$-3.49M	USD	1 Quarter
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$504.00K	USD	1 Quarter
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$608.00K	USD	Annual
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$1.09M	USD	Annual
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$521.00K	USD	3 Qtrs
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$427.00K	USD	1 Quarter
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$479.00K	USD	3 Qtrs
Comprehensive income (loss) attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$-4.00M	USD	1 Quarter
Comprehensive income (loss) attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$3.37M	USD	1 Quarter
Comprehensive income (loss) attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$121.54M	USD	Annual
Comprehensive income (loss) attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$90.83M	USD	3 Qtrs
Comprehensive income (loss) attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$154.69M	USD	Annual
Comprehensive income (loss) attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$74.36M	USD	3 Qtrs

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