10-Q Filing

SOUTHWEST GAS CORP CIK: 92416 Q1 2016

Filing Information

Form Type	10-Q
Accession Number	`0001193125-16-583200`
Period End Date	20160331
Filing Date	20160509
Fiscal Year	2016
Fiscal Period	Q1
XBRL Instance	swx-20160331.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 95 Income Statement 92 Cash Flow Statement 141 Stockholders Equity 51

Balance Sheet 95 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`	47.47M	shares	Point-in-time
Common stock, issued	`CommonStockSharesIssued`	47.38M	shares	Point-in-time
Gas plant	`PublicUtilitiesPropertyPlantAndEquipmentPlantInService`	$5.85B	USD	Point-in-time
Gas plant	`PublicUtilitiesPropertyPlantAndEquipmentPlantInService`	$5.96B	USD	Point-in-time
Common stock, outstanding	`CommonStockSharesOutstanding`	47.47M	shares	Point-in-time
Less: accumulated depreciation	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$2.11B	USD	Point-in-time
Less: accumulated depreciation	`PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation`	$2.08B	USD	Point-in-time
Common stock, outstanding	`CommonStockSharesOutstanding`	47.38M	shares	Point-in-time
Acquisition adjustments, net	`PublicUtilitiesPropertyPlantAndEquipmentAmountOfAcquisitionAdjustments1`	$325.00K	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`	$77.22M	USD	Point-in-time
Net utility plant	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$3.89B	USD	Point-in-time
Net utility plant	`PublicUtilitiesPropertyPlantAndEquipmentNet`	$3.93B	USD	Point-in-time
Other property and investments	`OtherPropertyAndInvestments`	$313.53M	USD	Point-in-time
Other property and investments	`OtherPropertyAndInvestments`	$328.12M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$36.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$85.37M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$60.81M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$39.57M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$38.01M	USD	Point-in-time
Accounts receivable, net of allowances	`AccountsReceivableNetCurrent`	$271.31M	USD	Point-in-time
Accounts receivable, net of allowances	`AccountsReceivableNetCurrent`	$314.51M	USD	Point-in-time
Accrued utility revenue	`AccruedUtilityRevenue`	$45.10M	USD	Point-in-time
Accrued utility revenue	`AccruedUtilityRevenue`	$74.70M	USD	Point-in-time
Income taxes receivable, net	`IncomeTaxesReceivable`	$11.93M	USD	Point-in-time
Income taxes receivable, net	`IncomeTaxesReceivable`	$34.17M	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`	$81.08M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$470.23M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$558.17M	USD	Point-in-time
Goodwill	`Goodwill`	$132.77M	USD	Point-in-time
Goodwill	`Goodwill`	$126.14M	USD	Point-in-time
Deferred income taxes	`DeferredTaxAssetsNetNoncurrent`	$428.00K	USD	Point-in-time
Deferred income taxes	`DeferredTaxAssetsNetNoncurrent`	$598.00K	USD	Point-in-time
Deferred charges and other assets	`OtherAssetsNoncurrent`	$469.32M	USD	Point-in-time
Deferred charges and other assets	`OtherAssetsNoncurrent`	$455.34M	USD	Point-in-time
Total noncurrent assets	`AssetsNoncurrent`	$588.71M	USD	Point-in-time
Total noncurrent assets	`AssetsNoncurrent`	$595.89M	USD	Point-in-time
Total assets	`Assets`	$5.36B	USD	Point-in-time
Total assets	`Assets`	$5.32B	USD	Point-in-time
Common stock, $1 par (authorized - 60,000,000 shares; issued and outstanding - 47,470,282 and 47,377,575 shares)	`CommonStockValue`	$49.10M	USD	Point-in-time
Common stock, $1 par (authorized - 60,000,000 shares; issued and outstanding - 47,470,282 and 47,377,575 shares)	`CommonStockValue`	$49.01M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$898.46M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$896.45M	USD	Point-in-time
Accumulated other comprehensive income (loss), net	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-48.39M	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`	$753.11M	USD	Point-in-time
Total Southwest Gas Corporation equity	`StockholdersEquity`	$1.59B	USD	Point-in-time
Total Southwest Gas Corporation equity	`StockholdersEquity`	$1.65B	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$-2.08M	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$-2.10M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.65B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.59B	USD	Point-in-time
Redeemable noncontrolling interest	`RedeemableNoncontrollingInterestEquityCarryingAmount`	$15.96M	USD	Point-in-time
Redeemable noncontrolling interest	`RedeemableNoncontrollingInterestEquityCarryingAmount`	$16.11M	USD	Point-in-time
Long-term debt, less current maturities	`LongTermDebtNoncurrent`	$1.55B	USD	Point-in-time
Long-term debt, less current maturities	`LongTermDebtNoncurrent`	$1.39B	USD	Point-in-time
Total capitalization	`CapitalizationLongtermDebtAndEquity`	$3.16B	USD	Point-in-time
Total capitalization	`CapitalizationLongtermDebtAndEquity`	$3.06B	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$19.48M	USD	Point-in-time
Current maturities of long-term debt	`LongTermDebtCurrent`	$48.60M	USD	Point-in-time
Short-term debt	`ShortTermBorrowings`	$18.00M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$164.86M	USD	Point-in-time
Accounts payable	`AccountsPayableCurrent`	$133.88M	USD	Point-in-time
Customer deposits	`CustomerDepositsCurrent`	$72.63M	USD	Point-in-time
Customer deposits	`CustomerDepositsCurrent`	$72.90M	USD	Point-in-time
Income taxes payable	`IncomeTaxesPayable`	$940.00K	USD	Point-in-time
Income taxes payable	`IncomeTaxesPayable`	$8.00K	USD	Point-in-time
Accrued general taxes	`AccrualForTaxesOtherThanIncomeTaxesCurrent`	$47.34M	USD	Point-in-time
Accrued general taxes	`AccrualForTaxesOtherThanIncomeTaxesCurrent`	$62.23M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$16.17M	USD	Point-in-time
Accrued interest	`InterestPayableCurrent`	$21.81M	USD	Point-in-time
Deferred purchased gas costs	`DeferredGasPurchasesCurrent`	$100.99M	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`	$137.64M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$535.04M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$578.07M	USD	Point-in-time
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndUnamortizedInvestmentTaxCredits`	$789.96M	USD	Point-in-time
Deferred income taxes and investment tax credits	`DeferredIncomeTaxesAndUnamortizedInvestmentTaxCredits`	$769.45M	USD	Point-in-time
Accumulated removal costs	`OtherAccruedLiabilitiesNoncurrent`	$304.00M	USD	Point-in-time
Accumulated removal costs	`OtherAccruedLiabilitiesNoncurrent`	$303.00M	USD	Point-in-time
Other deferred credits and other long-term liabilities	`DeferredCreditsAndOtherLiabilitiesNoncurrent`	$588.87M	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`	$1.68B	USD	Point-in-time
Total deferred income taxes and other credits	`OtherLiabilitiesNoncurrent`	$1.66B	USD	Point-in-time
Total capitalization and liabilities	`LiabilitiesAndStockholdersEquity`	$5.36B	USD	Point-in-time
Total capitalization and liabilities	`LiabilitiesAndStockholdersEquity`	$5.32B	USD	Point-in-time

Income Statement 92 line items

Line Item	Tag	Value	Unit	Period
Gas operating revenues	`RegulatedOperatingRevenueGas`	$525.10M	USD	1 Quarter
Gas operating revenues	`RegulatedOperatingRevenueGas`	$553.12M	USD	1 Quarter
Gas operating revenues	`RegulatedOperatingRevenueGas`	$1.45B	USD	Annual
Gas operating revenues	`RegulatedOperatingRevenueGas`	$1.43B	USD	Annual
Construction revenues	`ConstructionRevenue`	$206.15M	USD	1 Quarter
Construction revenues	`ConstructionRevenue`	$181.10M	USD	1 Quarter
Construction revenues	`ConstructionRevenue`	$798.82M	USD	Annual
Construction revenues	`ConstructionRevenue`	$1.03B	USD	Annual
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$2.25B	USD	Annual
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$2.46B	USD	Annual
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$731.25M	USD	1 Quarter
Total operating revenues	`RegulatedAndUnregulatedOperatingRevenue`	$734.22M	USD	1 Quarter
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$567.74M	USD	Annual
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$523.65M	USD	Annual
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$213.60M	USD	1 Quarter
Net cost of gas sold	`UtilitiesOperatingExpenseGasAndPetroleumPurchased`	$253.76M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$95.51M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$100.80M	USD	1 Quarter
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$398.49M	USD	Annual
Operations and maintenance	`UtilitiesOperatingExpenseMaintenanceAndOperations`	$376.83M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$75.36M	USD	1 Quarter
Depreciation and amortization	`DepreciationAndAmortization`	$257.60M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$278.00M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$67.47M	USD	1 Quarter
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$48.79M	USD	Annual
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$14.01M	USD	1 Quarter
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$13.00M	USD	1 Quarter
Taxes other than income taxes	`TaxesExcludingIncomeAndExciseTaxes`	$50.41M	USD	Annual
Construction expenses	`ConstructionAndDevelopmentCosts`	$174.93M	USD	1 Quarter
Construction expenses	`ConstructionAndDevelopmentCosts`	$917.24M	USD	Annual
Construction expenses	`ConstructionAndDevelopmentCosts`	$709.59M	USD	Annual
Construction expenses	`ConstructionAndDevelopmentCosts`	$193.38M	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$597.15M	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$1.96B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$2.17B	USD	Annual
Total operating expenses	`CostsAndExpenses`	$604.66M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$129.56M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$286.97M	USD	Annual
Operating income	`OperatingIncomeLoss`	$134.10M	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$292.87M	USD	Annual
Net interest deductions	`InterestExpense`	$72.53M	USD	Annual
Net interest deductions	`InterestExpense`	$17.72M	USD	1 Quarter
Net interest deductions	`InterestExpense`	$17.98M	USD	1 Quarter
Net interest deductions	`InterestExpense`	$71.62M	USD	Annual
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$1.72M	USD	1 Quarter
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$2.33M	USD	Annual
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$2.27M	USD	1 Quarter
Other income (deductions)	`OtherNonoperatingIncomeExpense`	$7.77M	USD	Annual
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-16.00M	USD	1 Quarter
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-15.71M	USD	1 Quarter
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-69.30M	USD	Annual
Total other income and (expenses)	`NonoperatingIncomeExpense`	$-64.76M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$223.58M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$222.21M	USD	Annual
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$113.85M	USD	1 Quarter
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$118.10M	USD	1 Quarter
Income tax expense	`IncomeTaxExpenseBenefit`	$79.88M	USD	Annual
Income tax expense	`IncomeTaxExpenseBenefit`	$41.97M	USD	1 Quarter
Income tax expense	`IncomeTaxExpenseBenefit`	$42.74M	USD	1 Quarter
Income tax expense	`IncomeTaxExpenseBenefit`	$80.67M	USD	Annual
Net income	`ProfitLoss`	$142.91M	USD	Annual
Net income	`ProfitLoss`	$71.88M	USD	1 Quarter
Net income	`ProfitLoss`	$142.33M	USD	Annual
Net income	`ProfitLoss`	$75.36M	USD	1 Quarter
Net income (loss) attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-91.00K	USD	1 Quarter
Net income (loss) attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$1.13M	USD	Annual
Net income (loss) attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-104.00K	USD	1 Quarter
Net income (loss) attributable to noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$4.00K	USD	Annual
Net income attributable to Southwest Gas Corporation	`NetIncomeLoss`	$71.98M	USD	1 Quarter
Net income attributable to Southwest Gas Corporation	`NetIncomeLoss`	$141.78M	USD	Annual
Net income attributable to Southwest Gas Corporation	`NetIncomeLoss`	$142.33M	USD	Annual
Net income attributable to Southwest Gas Corporation	`NetIncomeLoss`	$75.45M	USD	1 Quarter
Basic earnings per share	`EarningsPerShareBasic`	$3.00	USD	Annual
Basic earnings per share	`EarningsPerShareBasic`	$1.59	USD	1 Quarter
Basic earnings per share	`EarningsPerShareBasic`	$3.06	USD	Annual
Basic earnings per share	`EarningsPerShareBasic`	$1.54	USD	1 Quarter
Diluted earnings per share	`EarningsPerShareDiluted`	$1.58	USD	1 Quarter
Diluted earnings per share	`EarningsPerShareDiluted`	$2.98	USD	Annual
Diluted earnings per share	`EarningsPerShareDiluted`	$3.03	USD	Annual
Diluted earnings per share	`EarningsPerShareDiluted`	$1.53	USD	1 Quarter
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$1.50	USD	Annual
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$0.45	USD	1 Quarter
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$0.41	USD	1 Quarter
Dividends declared per share	`CommonStockDividendsPerShareDeclared`	$1.67	USD	Annual
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	47.20M	shares	Annual
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	46.61M	shares	1 Quarter
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	47.44M	shares	1 Quarter
Average number of common shares outstanding	`WeightedAverageNumberOfSharesOutstandingBasic`	46.54M	shares	Annual
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	46.99M	shares	Annual
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.04M	shares	1 Quarter
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.56M	shares	Annual
Average shares outstanding (assuming dilution)	`WeightedAverageNumberOfDilutedSharesOutstanding`	47.76M	shares	1 Quarter

Cash Flow Statement 141 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$142.91M	USD	Annual
Net income	`ProfitLoss`	$71.88M	USD	1 Quarter
Net income	`ProfitLoss`	$142.33M	USD	Annual
Net income	`ProfitLoss`	$75.36M	USD	1 Quarter
Depreciation and amortization	`DepreciationAndAmortization`	$278.00M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$67.47M	USD	1 Quarter
Depreciation and amortization	`DepreciationAndAmortization`	$257.60M	USD	Annual
Depreciation and amortization	`DepreciationAndAmortization`	$75.36M	USD	1 Quarter
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$-60.13M	USD	Annual
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$-7.58M	USD	1 Quarter
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$-58.20M	USD	Annual
Deferred income taxes	`IncreaseDecreaseInDeferredIncomeTaxes`	$-18.93M	USD	1 Quarter
Accounts receivable, net of allowances	`IncreaseDecreaseInAccountsReceivable`	$-45.52M	USD	1 Quarter
Accounts receivable, net of allowances	`IncreaseDecreaseInAccountsReceivable`	$31.85M	USD	1 Quarter
Accounts receivable, net of allowances	`IncreaseDecreaseInAccountsReceivable`	$49.49M	USD	Annual
Accounts receivable, net of allowances	`IncreaseDecreaseInAccountsReceivable`	$-37.52M	USD	Annual
Accrued utility revenue	`IncreaseDecreaseInUnbilledReceivables`	$-29.60M	USD	1 Quarter
Accrued utility revenue	`IncreaseDecreaseInUnbilledReceivables`	$-29.50M	USD	1 Quarter
Accrued utility revenue	`IncreaseDecreaseInUnbilledReceivables`	$700.00K	USD	Annual
Accrued utility revenue	`IncreaseDecreaseInUnbilledReceivables`	$300.00K	USD	Annual
Deferred purchased gas costs	`IncreaseDecreaseInDeferredGasCost`	$-59.42M	USD	1 Quarter
Deferred purchased gas costs	`IncreaseDecreaseInDeferredGasCost`	$-58.98M	USD	1 Quarter
Deferred purchased gas costs	`IncreaseDecreaseInDeferredGasCost`	$-129.12M	USD	Annual
Deferred purchased gas costs	`IncreaseDecreaseInDeferredGasCost`	$-47.06M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-35.13M	USD	1 Quarter
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-49.17M	USD	1 Quarter
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$-24.03M	USD	Annual
Accounts payable	`IncreaseDecreaseInAccountsPayable`	$10.56M	USD	Annual
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$49.78M	USD	1 Quarter
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$2.81M	USD	Annual
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-21.89M	USD	Annual
Accrued taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$36.30M	USD	1 Quarter
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-6.78M	USD	1 Quarter
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$6.47M	USD	Annual
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-31.55M	USD	1 Quarter
Other current assets and liabilities	`IncreaseDecreaseInOtherCurrentAssetsAndLiabilitiesNet`	$-18.41M	USD	Annual
Gains on sale	`GainLossOnSaleOfPropertyPlantEquipment`	$1.33M	USD	1 Quarter
Gains on sale	`GainLossOnSaleOfPropertyPlantEquipment`	$5.27M	USD	Annual
Gains on sale	`GainLossOnSaleOfPropertyPlantEquipment`	$2.91M	USD	Annual
Gains on sale	`GainLossOnSaleOfPropertyPlantEquipment`	$1.53M	USD	1 Quarter
Changes in undistributed stock compensation	`ShareBasedCompensation`	$5.67M	USD	Annual
Changes in undistributed stock compensation	`ShareBasedCompensation`	$3.85M	USD	Annual
Changes in undistributed stock compensation	`ShareBasedCompensation`	$1.39M	USD	1 Quarter
Changes in undistributed stock compensation	`ShareBasedCompensation`	$462.00K	USD	1 Quarter
AFUDC	`IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction`	$3.14M	USD	Annual
AFUDC	`IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction`	$1.89M	USD	Annual
AFUDC	`IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction`	$532.00K	USD	1 Quarter
AFUDC	`IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction`	$396.00K	USD	1 Quarter
Changes in other assets and deferred charges	`IncreaseDecreaseInOtherOperatingAssets`	$13.34M	USD	1 Quarter
Changes in other assets and deferred charges	`IncreaseDecreaseInOtherOperatingAssets`	$23.93M	USD	Annual
Changes in other assets and deferred charges	`IncreaseDecreaseInOtherOperatingAssets`	$291.00K	USD	1 Quarter
Changes in other assets and deferred charges	`IncreaseDecreaseInOtherOperatingAssets`	$1.12M	USD	Annual
Changes in other liabilities and deferred credits	`IncreaseDecreaseInOtherOperatingLiabilities`	$876.00K	USD	1 Quarter
Changes in other liabilities and deferred credits	`IncreaseDecreaseInOtherOperatingLiabilities`	$1.72M	USD	1 Quarter
Changes in other liabilities and deferred credits	`IncreaseDecreaseInOtherOperatingLiabilities`	$-500.00K	USD	Annual
Changes in other liabilities and deferred credits	`IncreaseDecreaseInOtherOperatingLiabilities`	$11.71M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$637.56M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$426.67M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$312.65M	USD	1 Quarter
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$222.24M	USD	1 Quarter
Construction expenditures and property additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$90.39M	USD	1 Quarter
Construction expenditures and property additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$112.56M	USD	1 Quarter
Construction expenditures and property additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$410.40M	USD	Annual
Construction expenditures and property additions	`PaymentsToAcquirePropertyPlantAndEquipment`	$510.17M	USD	Annual
Acquisition of businesses, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$9.26M	USD	1 Quarter
Acquisition of businesses, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$199.76M	USD	Annual
Restricted cash	`IncreaseDecreaseInRestrictedCash`	$-1.23M	USD	Annual
Restricted cash	`IncreaseDecreaseInRestrictedCash`	$-785.00K	USD	Annual
Changes in customer advances	`IncreaseDecreaseInCustomerAdvances`	$16.52M	USD	Annual
Changes in customer advances	`IncreaseDecreaseInCustomerAdvances`	$3.66M	USD	1 Quarter
Changes in customer advances	`IncreaseDecreaseInCustomerAdvances`	$5.45M	USD	1 Quarter
Changes in customer advances	`IncreaseDecreaseInCustomerAdvances`	$21.70M	USD	Annual
Miscellaneous inflows	`ProceedsFromMiscellaneousInvestingActivities`	$6.64M	USD	Annual
Miscellaneous inflows	`ProceedsFromMiscellaneousInvestingActivities`	$1.13M	USD	1 Quarter
Miscellaneous inflows	`ProceedsFromMiscellaneousInvestingActivities`	$10.85M	USD	Annual
Miscellaneous inflows	`ProceedsFromMiscellaneousInvestingActivities`	$2.83M	USD	1 Quarter
Miscellaneous outflows	`PaymentsForMiscellaneousInvestingActivities`	$1.40M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-486.23M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-91.37M	USD	1 Quarter
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-107.77M	USD	1 Quarter
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-577.76M	USD	Annual
Issuance of common stock, net	`ProceedsFromIssuanceOfCommonStock`	$27.01M	USD	Annual
Issuance of common stock, net	`ProceedsFromIssuanceOfCommonStock`	$9.09M	USD	Annual
Issuance of common stock, net	`ProceedsFromIssuanceOfCommonStock`	$401.00K	USD	1 Quarter
Issuance of common stock, net	`ProceedsFromIssuanceOfCommonStock`	$8.79M	USD	1 Quarter
Dividends paid	`PaymentsOfDividendsCommonStock`	$19.22M	USD	1 Quarter
Dividends paid	`PaymentsOfDividendsCommonStock`	$17.02M	USD	1 Quarter
Dividends paid	`PaymentsOfDividendsCommonStock`	$67.95M	USD	Annual
Dividends paid	`PaymentsOfDividendsCommonStock`	$76.44M	USD	Annual
Centuri distribution to redeemable noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	$99.00K	USD	1 Quarter
Centuri distribution to redeemable noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	$198.00K	USD	Annual
Issuance of long-term debt, net	`ProceedsFromIssuanceOfLongTermDebt`	$318.50M	USD	Annual
Issuance of long-term debt, net	`ProceedsFromIssuanceOfLongTermDebt`	$134.90M	USD	Annual
Issuance of long-term debt, net	`ProceedsFromIssuanceOfLongTermDebt`	$49.38M	USD	1 Quarter
Issuance of long-term debt, net	`ProceedsFromIssuanceOfLongTermDebt`	$50.30M	USD	1 Quarter
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$18.08M	USD	1 Quarter
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$212.20M	USD	Annual
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$42.31M	USD	1 Quarter
Retirement of long-term debt	`RepaymentsOfLongTermDebt`	$153.46M	USD	Annual
Change in credit facility and commercial paper	`ProceedsFromRepaymentsOfLinesOfCreditAndCommercialPaper`	$-150.00M	USD	1 Quarter
Change in credit facility and commercial paper	`ProceedsFromRepaymentsOfLinesOfCreditAndCommercialPaper`	$-150.00M	USD	1 Quarter
Change in short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	$-18.00M	USD	1 Quarter
Change in short-term debt	`ProceedsFromRepaymentsOfShortTermDebt`	$-5.00M	USD	1 Quarter
Principal payments on capital lease obligations	`RepaymentsOfDebtAndCapitalLeaseObligations`	$820.00K	USD	Annual
Principal payments on capital lease obligations	`RepaymentsOfDebtAndCapitalLeaseObligations`	$313.00K	USD	1 Quarter
Principal payments on capital lease obligations	`RepaymentsOfDebtAndCapitalLeaseObligations`	$386.00K	USD	1 Quarter
Principal payments on capital lease obligations	`RepaymentsOfDebtAndCapitalLeaseObligations`	$1.35M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-329.00K	USD	1 Quarter
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$512.00K	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-1.07M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$142.00K	USD	1 Quarter
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$104.29M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$-131.73M	USD	1 Quarter
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$-180.03M	USD	1 Quarter
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivitiesContinuingOperations`	$-127.78M	USD	Annual
Effects of currency translation on cash and cash equivalents	`EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations`	$-546.00K	USD	Annual
Effects of currency translation on cash and cash equivalents	`EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations`	$-41.00K	USD	1 Quarter
Effects of currency translation on cash and cash equivalents	`EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations`	$-688.00K	USD	1 Quarter
Effects of currency translation on cash and cash equivalents	`EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations`	$-760.00K	USD	Annual
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-1.55M	USD	1 Quarter
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$24.81M	USD	1 Quarter
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$22.80M	USD	Annual
Change in cash and cash equivalents	`CashAndCashEquivalentsPeriodIncreaseDecrease`	$-47.35M	USD	Annual
Cash and cash equivalents at beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$38.01M	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`	$60.81M	USD	Point-in-time
Cash and cash equivalents at beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$85.37M	USD	Point-in-time
Cash and cash equivalents at beginning of period	`CashAndCashEquivalentsAtCarryingValue`	$36.00M	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`	$38.01M	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`	$60.81M	USD	Point-in-time
Cash and cash equivalents at end of period	`CashAndCashEquivalentsAtCarryingValue`	$85.37M	USD	Point-in-time
Interest paid, net of amounts capitalized	`InterestPaidNet`	$65.58M	USD	Annual
Interest paid, net of amounts capitalized	`InterestPaidNet`	$66.72M	USD	Annual
Interest paid, net of amounts capitalized	`InterestPaidNet`	$10.59M	USD	1 Quarter
Interest paid, net of amounts capitalized	`InterestPaidNet`	$10.50M	USD	1 Quarter
Income taxes paid	`IncomeTaxesPaid`	$26.11M	USD	Annual
Income taxes paid	`IncomeTaxesPaid`	$2.14M	USD	1 Quarter
Income taxes paid	`IncomeTaxesPaid`	$2.10M	USD	1 Quarter
Income taxes paid	`IncomeTaxesPaid`	$43.26M	USD	Annual

Stockholders Equity 51 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$142.91M	USD	Annual
Net income	`ProfitLoss`	$71.88M	USD	1 Quarter
Net income	`ProfitLoss`	$142.33M	USD	Annual
Net income	`ProfitLoss`	$75.36M	USD	1 Quarter
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-107.66M	USD	Annual
Net actuarial gain (loss)	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-18.92M	USD	Annual
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$206.00K	USD	1 Quarter
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$371.00K	USD	Annual
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$829.00K	USD	Annual
Amortization of prior service cost	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax`	$207.00K	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-20.18M	USD	Annual
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-5.33M	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-4.20M	USD	1 Quarter
Amortization of net actuarial loss	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-16.33M	USD	Annual
Prior service cost	`OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax`	$4.13M	USD	Annual
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$-85.37M	USD	Annual
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$4.83M	USD	1 Quarter
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$3.80M	USD	1 Quarter
Regulatory adjustment	`OtherComprehensiveIncomeDefinedBenefitPlansRegulatoryAdjustmentNetOfTax`	$2.47M	USD	Annual
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$9.72M	USD	Annual
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$379.00K	USD	Annual
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-607.00K	USD	1 Quarter
Net defined benefit pension plans	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-708.00K	USD	1 Quarter
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`	$-2.07M	USD	Annual
Amounts reclassified into net income	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax`	$-519.00K	USD	1 Quarter
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`	$519.00K	USD	1 Quarter
Net forward-starting interest rate swaps	`OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax`	$2.07M	USD	Annual
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-1.93M	USD	Annual
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$782.00K	USD	1 Quarter
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-1.27M	USD	1 Quarter
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$100.00K	USD	Annual
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$1.79M	USD	Annual
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$1.91M	USD	1 Quarter
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-45.00K	USD	1 Quarter
Total other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-9.57M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$77.26M	USD	1 Quarter
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$71.83M	USD	1 Quarter
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$132.76M	USD	Annual
Comprehensive income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$144.70M	USD	Annual
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$1.13M	USD	Annual
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-61.00K	USD	Annual
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-65.00K	USD	1 Quarter
Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-147.00K	USD	1 Quarter
Comprehensive income attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$71.98M	USD	1 Quarter
Comprehensive income attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$77.33M	USD	1 Quarter
Comprehensive income attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$132.82M	USD	Annual
Comprehensive income attributable to Southwest Gas Corporation	`ComprehensiveIncomeNetOfTax`	$143.57M	USD	Annual

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