$OGS
ONE Gas, Inc. Stock $ogs

$ogs Overview Financials Valuation SEC Filings Company Website

2016 Q4 Form 10-K Financial Statement

#000158773217000011 Filed on February 23, 2017

Income Statement

Concept	2016 Q4	2015 Q4	2015 Q3
Revenue	$440.8M	$389.1M	$225.2M
YoY Change	13.29%	-24.36%	-6.75%
Cost Of Revenue	$197.4M	$157.7M	$54.70M
YoY Change	25.17%	-45.66%	-27.16%
Gross Profit	$243.4M	$231.4M	$170.5M
YoY Change	5.18%	3.23%	2.43%
Gross Profit Margin	55.22%	59.47%	75.71%
Selling, General & Admin	$127.5M	$123.1M	$111.6M
YoY Change	3.57%	0.57%	-3.88%
% of Gross Profit	52.38%	53.19%	65.45%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$37.30M	$34.40M	$34.00M
YoY Change	8.43%	8.52%	8.97%
% of Gross Profit	15.32%	14.87%	19.94%
Operating Expenses	$164.8M	$157.5M	$145.6M
YoY Change	4.63%	2.14%	-1.15%
Operating Profit	$78.53M	$73.90M	$24.95M
YoY Change	6.27%	5.56%	30.5%
Interest Expense	-$11.20M	-$11.00M	$11.23M
YoY Change	1.82%	10.0%	0.65%
% of Operating Profit	-14.26%	-14.88%	45.02%
Other Income/Expense, Net	-$300.0K	-$800.0K	-$1.700M
YoY Change	-62.5%	60.0%	183.33%
Pretax Income	$67.00M	$62.20M	$12.00M
YoY Change	7.72%	4.36%	64.05%
Income Tax	$24.70M	$23.00M	$4.629M
% Of Pretax Income	36.87%	36.98%	38.58%
Net Earnings	$42.32M	$39.20M	$7.371M
YoY Change	7.94%	7.09%	58.41%
Net Earnings / Revenue	9.6%	10.08%	3.27%
Basic Earnings Per Share	$0.81	$0.75	$0.14
Diluted Earnings Per Share	$0.80	$0.74	$0.14
COMMON SHARES
Basic Shares Outstanding	52.25M shares	52.15M shares	52.41M shares
Diluted Shares Outstanding			53.07M shares

Balance Sheet

Concept	2016 Q4	2015 Q4	2015 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$14.70M	$2.400M	$53.00M
YoY Change	512.5%	-79.83%	-11.22%
Cash & Equivalents	$14.66M	$2.433M	$52.97M
Short-Term Investments
Other Short-Term Assets	$20.65M	$16.79M	$12.23M
YoY Change	23.02%	-23.7%	-69.83%
Inventory	$159.5M	$175.5M	$193.3M
Prepaid Expenses
Receivables	$290.9M	$216.3M	$103.4M
Other Receivables	$1.400M	$38.90M	$23.70M
Total Short-Term Assets	$568.9M	$482.8M	$417.3M
YoY Change	17.83%	-27.66%	-17.39%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.732B	$3.512B	$3.436B
YoY Change	6.26%	6.62%	6.14%
Goodwill	$158.0M	$158.0M	$158.0M
YoY Change	0.0%	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$43.77M	$46.19M	$54.91M
YoY Change	-5.24%	-9.98%	4.01%
Total Long-Term Assets	$4.374B	$4.152B	$4.089B
YoY Change	5.35%	4.27%	8.76%
TOTAL ASSETS
Total Short-Term Assets	$568.9M	$482.8M	$417.3M
Total Long-Term Assets	$4.374B	$4.152B	$4.089B
Total Assets	$4.943B	$4.635B	$4.506B
YoY Change	6.65%	-0.31%	5.66%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$132.0M	$107.5M	$57.24M
YoY Change	22.8%	-32.43%	-41.38%
Accrued Expenses	$22.93M	$31.47M	$18.00M
YoY Change	-27.13%	20.95%	-13.33%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$12.50M	$0.00
YoY Change	-100.0%	-70.24%
Long-Term Debt Due	$7.000K	$7.000K	$7.000K
YoY Change	0.0%	16.67%	16.67%
Total Short-Term Liabilities	$443.9M	$304.2M	$233.5M
YoY Change	45.92%	-22.48%	-14.84%
LONG-TERM LIABILITIES
Long-Term Debt	$1.192B	$1.192B	$1.201B
YoY Change	0.07%	-0.8%	0.0%
Other Long-Term Liabilities	$76.06M	$73.24M	$78.91M
YoY Change	3.85%	-7.37%	-56.92%
Total Long-Term Liabilities	$1.269B	$1.265B	$1.280B
YoY Change	0.29%	-1.21%	-7.53%
TOTAL LIABILITIES
Total Short-Term Liabilities	$443.9M	$304.2M	$233.5M
Total Long-Term Liabilities	$1.269B	$1.265B	$1.280B
Total Liabilities	$1.712B	$1.569B	$1.514B
YoY Change	9.13%	-6.2%	-8.74%
SHAREHOLDERS EQUITY
Retained Earnings	$161.0M	$95.05M	$71.75M
YoY Change	69.41%	138.25%	288.11%
Common Stock	$526.0K	$526.0K	$526.0K
YoY Change	0.0%	0.96%	1.15%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$18.13M	$14.49M	$19.11M
YoY Change	25.08%
Treasury Stock Shares	314.7K shares	338.8K shares	446.7K shares
Shareholders Equity	$1.888B	$1.842B	$1.811B
YoY Change
Total Liabilities & Shareholders Equity	$4.943B	$4.635B	$4.506B
YoY Change	6.65%	-0.31%	5.66%

Cashflow Statement

Concept	2016 Q4	2015 Q4	2015 Q3
OPERATING ACTIVITIES
Net Income	$42.32M	$39.20M	$7.371M
YoY Change	7.94%	7.09%	58.41%
Depreciation, Depletion And Amortization	$37.30M	$34.40M	$34.00M
YoY Change	8.43%	8.52%	8.97%
Cash From Operating Activities	$9.200M	$58.40M	$6.900M
YoY Change	-84.25%	-1869.7%	-158.97%
INVESTING ACTIVITIES
Capital Expenditures	-$77.80M	-$94.60M	-$74.30M
YoY Change	-17.76%	30.48%	-2.24%
Acquisitions
YoY Change
Other Investing Activities	$0.00	$0.00
YoY Change
Cash From Investing Activities	-$77.80M	-$94.60M	-$74.30M
YoY Change	-17.76%	30.48%	-2.24%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	78.70M	-14.30M	-15.60M
YoY Change	-650.35%	-150.89%	11.43%
NET CHANGE
Cash From Operating Activities	9.200M	58.40M	6.900M
Cash From Investing Activities	-77.80M	-94.60M	-74.30M
Cash From Financing Activities	78.70M	-14.30M	-15.60M
Net Change In Cash	10.10M	-50.50M	-83.00M
YoY Change	-120.0%	5.87%	-18.39%
FREE CASH FLOW
Cash From Operating Activities	$9.200M	$58.40M	$6.900M
Capital Expenditures	-$77.80M	-$94.60M	-$74.30M
Free Cash Flow	$87.00M	$153.0M	$81.20M
YoY Change	-43.14%	121.1%	26.28%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2016	dei	Amendment Flag AmendmentFlag	false
CY2016	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2016	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2016	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2016
CY2016	dei	Document Period End Date DocumentPeriodEndDate	2016-12-31
CY2016	dei	Document Type DocumentType	10-K
CY2016	dei	Entity Central Index Key EntityCentralIndexKey	0001587732
CY2017Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	52283788	shares
CY2016	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2016	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2016Q2	dei	Entity Public Float EntityPublicFloat	3200000000	USD
CY2016	dei	Entity Registrant Name EntityRegistrantName	ONE Gas, Inc.
CY2016	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2016	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
	ogs	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Minimum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMinimum	0.0335
CY2014	ogs	Cashpaymentto Oneo Kuponseparation CashpaymenttoONEOKuponseparation	1130000000	USD
CY2015	ogs	Cashpaymentto Oneo Kuponseparation CashpaymenttoONEOKuponseparation	0	USD
CY2015Q4	invest	Derivative Nonmonetary Notional Amount DerivativeNonmonetaryNotionalAmount	17000	MMcf
CY2016Q4	invest	Derivative Nonmonetary Notional Amount DerivativeNonmonetaryNotionalAmount	14300	MMcf
CY2016Q4	ogs	Number Of Former Manufactured Gas Sites Where We Own Or Retain Legal Responsibility For Environmental Conditions NumberOfFormerManufacturedGasSitesWhereWeOwnOrRetainLegalResponsibilityForEnvironmentalConditions	12
CY2016Q4	ogs	Number Of Sites Soil Remediation Is Completed Or Near Completion NumberOfSitesSoilRemediationIsCompletedOrNearCompletion	11
CY2016Q4	ogs	Number Of Sites Where Regulatory Closure Has Been Achieved NumberOfSitesWhereRegulatoryClosureHasBeenAchieved	3
CY2016Q4	ogs	Numberofsiteswithongoinggroundwatermonitoring Numberofsiteswithongoinggroundwatermonitoring	8
CY2016Q4	ogs	Percentageyieldofhighconsequencepipelineareas Percentageyieldofhighconsequencepipelineareas	0.3
CY2015	ogs	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Minimum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMinimum	0.0330
CY2016Q4	ogs	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Maximum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMaximum	0.034
CY2014	ogs	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Minimum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMinimum	0.0335
CY2016	ogs	Cashpaymentto Oneo Kuponseparation CashpaymenttoONEOKuponseparation	0	USD
CY2016	ogs	Commercialpapermaximumborrowingcapacity Commercialpapermaximumborrowingcapacity	700000000	USD
CY2014	ogs	Common Stock Dividends Declared Annualized Basis CommonStockDividendsDeclaredAnnualizedBasis	0.84
CY2015	ogs	Common Stock Dividends Declared Annualized Basis CommonStockDividendsDeclaredAnnualizedBasis	1.20
CY2016	ogs	Common Stock Dividends Declared Annualized Basis CommonStockDividendsDeclaredAnnualizedBasis	1.40
CY2016Q4	ogs	Commonstockauthorizedandavailableforissuance Commonstockauthorizedandavailableforissuance	197700000	shares
CY2015Q4	ogs	Deferredtaxassetemployeebenefitsandotheraccruedliabilities Deferredtaxassetemployeebenefitsandotheraccruedliabilities	110148000	USD
CY2016Q4	ogs	Deferredtaxassetemployeebenefitsandotheraccruedliabilities Deferredtaxassetemployeebenefitsandotheraccruedliabilities	123333000	USD
CY2014	ogs	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Maximum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMaximum	0.035
CY2015	ogs	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Maximum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMaximum	0.035
	ogs	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Maximum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMaximum	0.034
CY2016Q4	ogs	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase Minimum DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncreaseMinimum	0.0335
CY2015Q4	ogs	Defined Benefit Plan Assumptions Used To Determine Benefit Obligations Rateof Compensation Increase Maximum DefinedBenefitPlanAssumptionsUsedToDetermineBenefitObligationsRateofCompensationIncreaseMaximum	0.034
CY2016Q4	ogs	Defined Benefit Plan Assumptions Used To Determine Benefit Obligations Rateof Compensation Increase Maximum DefinedBenefitPlanAssumptionsUsedToDetermineBenefitObligationsRateofCompensationIncreaseMaximum	0.034
CY2015Q4	ogs	Defined Benefit Plan Assumptions Used To Determine Benefit Obligations Rateof Compensation Increase Minimum DefinedBenefitPlanAssumptionsUsedToDetermineBenefitObligationsRateofCompensationIncreaseMinimum	0.0335
CY2016Q4	ogs	Defined Benefit Plan Assumptions Used To Determine Benefit Obligations Rateof Compensation Increase Minimum DefinedBenefitPlanAssumptionsUsedToDetermineBenefitObligationsRateofCompensationIncreaseMinimum	0.0325
CY2016	ogs	Employee Stock Award Program Shares Remaining EmployeeStockAwardProgramSharesRemaining	15603
CY2016	ogs	Environmental Reserve Estimate Actual EnvironmentalReserveEstimateActual	4
CY2016	ogs	Environmental Reserve Estimate Range High EnvironmentalReserveEstimateRangeHigh	7
CY2016	ogs	Environmental Reserve Estimate Range Low EnvironmentalReserveEstimateRangeLow	4
CY2015	ogs	Fair Value Assets Transfersbetween Levels FairValueAssetsTransfersbetweenLevels	0	USD
CY2016	ogs	Fair Value Assets Transfersbetween Levels FairValueAssetsTransfersbetweenLevels	0	USD
CY2014	ogs	Netissuanceofcommonstockattheseparation Value NetissuanceofcommonstockattheseparationValue	0	USD
CY2015Q4	ogs	Netregulatoryassetsandliabilitiescurrent Netregulatoryassetsandliabilitiescurrent	8310000	USD
CY2016Q4	ogs	Netregulatoryassetsandliabilitiescurrent Netregulatoryassetsandliabilitiescurrent	71224000	USD
CY2015Q4	ogs	Netregulatoryassetsandliabilitiesnoncurrent Netregulatoryassetsandliabilitiesnoncurrent	426831000	USD
CY2016Q4	ogs	Netregulatoryassetsandliabilitiesnoncurrent Netregulatoryassetsandliabilitiesnoncurrent	440522000	USD
CY2014	ogs	Nettransfersfrom Oneok NettransfersfromONEOK	481086000	USD
CY2016Q4	ogs	Number Of Natural Gas Distribution Services Customers NumberOfNaturalGasDistributionServicesCustomers	2000000
CY2016Q4	ogs	Operating Loss Carryforwards Tax Benefit OperatingLossCarryforwardsTaxBenefit	11000000	USD
CY2014	ogs	Othercomprehensiveincomelossreclassification Regulatoryadjustments OthercomprehensiveincomelossreclassificationRegulatoryadjustments	32445000	USD
CY2015	ogs	Othercomprehensiveincomelossreclassification Regulatoryadjustments OthercomprehensiveincomelossreclassificationRegulatoryadjustments	44615000	USD
CY2016	ogs	Othercomprehensiveincomelossreclassification Regulatoryadjustments OthercomprehensiveincomelossreclassificationRegulatoryadjustments	36845000	USD
CY2014	ogs	Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments	-32958000	USD
CY2015	ogs	Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments	-45532000	USD
CY2016	ogs	Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments Othercomprehensiveincomelossreclassificationadjustmentbeforetaxandregulatoryadjustments	-37596000	USD
CY2015Q4	ogs	Premiumsrecordedinothercurrentassetsonnaturalgascontractsheld Premiumsrecordedinothercurrentassetsonnaturalgascontractsheld	5800000	USD
CY2016Q4	ogs	Premiumsrecordedinothercurrentassetsonnaturalgascontractsheld Premiumsrecordedinothercurrentassetsonnaturalgascontractsheld	5400000	USD
CY2014	ogs	Reclassificationof Ownersinvestmenttopaidincapital ReclassificationofOwnersinvestmenttopaidincapital	0	USD
CY2015Q4	ogs	Total Deferred Credits And Other Liabilities TotalDeferredCreditsAndOtherLiabilities	1297329000	USD
CY2016Q4	ogs	Total Deferred Credits And Other Liabilities TotalDeferredCreditsAndOtherLiabilities	1418132000	USD
CY2015Q4	ogs	Totalgoodwillandotherassets Totalgoodwillandotherassets	640009000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	168115000	USD
CY2016Q4	ogs	Totalgoodwillandotherassets Totalgoodwillandotherassets	642248000	USD
CY2015Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	107482000	USD
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	131988000	USD
CY2015Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	37249000	USD
CY2016Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	42571000	USD
CY2015Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	31470000	USD
CY2016Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	22931000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-5174000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-4401000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-4715000	USD
CY2015Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1764875000	USD
CY2016Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1749574000	USD
CY2014	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	7000000	USD
CY2015	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	5700000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	7000000	USD
CY2015Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3500000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4200000	USD
CY2014	us-gaap	Amortization Of Rate Deferral AmortizationOfRateDeferral	6400000	USD
CY2015	us-gaap	Amortization Of Rate Deferral AmortizationOfRateDeferral	1600000	USD
CY2016	us-gaap	Amortization Of Rate Deferral AmortizationOfRateDeferral	3800000	USD
CY2014	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2015	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2016	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2015Q4	us-gaap	Assets Assets	4634765000	USD
CY2016Q4	us-gaap	Assets Assets	4942791000	USD
CY2015Q4	us-gaap	Assets Current AssetsCurrent	482845000	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	568923000	USD
CY2015Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	3033215000	USD
CY2016Q4	us-gaap	Capitalization Longterm Debt And Equity CapitalizationLongtermDebtAndEquity	3080726000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3171000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	11943000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2433000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	14663000	USD
CY2014	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	8772000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-9510000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	12230000	USD
CY2015Q4	us-gaap	Commercial Paper CommercialPaper	12500000	USD
CY2016Q4	us-gaap	Commercial Paper CommercialPaper	145000000	USD
CY2015Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	2800000	shares
CY2014	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.84
CY2015	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.20
CY2016	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.40
CY2015Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2016Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1038568000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	951785000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	1038568000	USD
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2015Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	250000000	shares
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	250000000	shares
CY2015Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	52598005	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	52598005	shares
CY2015Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	52259224	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	52283260	shares
CY2015Q4	us-gaap	Common Stock Value CommonStockValue	526000	USD
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	526000	USD
CY2014	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	108009000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	119803000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	139781000	USD
CY2014	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	17006000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	7135000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-2016000	USD
CY2014	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	18403000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	9190000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-1545000	USD
CY2014	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1397000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2055000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	471000	USD
CY2015Q4	us-gaap	Customer Deposits Current CustomerDepositsCurrent	60325000	USD
CY2016Q4	us-gaap	Customer Deposits Current CustomerDepositsCurrent	61209000	USD
CY2015	us-gaap	Debt Issuance Costs DebtIssuanceCosts	9645000	USD
CY2016	us-gaap	Debt Issuance Costs DebtIssuanceCosts	8851000	USD
CY2014	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	42024000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	56440000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	76247000	USD
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	49935000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	63789000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	86788000	USD
CY2015Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1069781000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1190711000	USD
CY2014	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	7911000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	7349000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	10541000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	117996000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	152143000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	0	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	23094000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	63000000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	21000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	7848000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	5716000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	951785000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	186207000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	897667000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	990682000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	3999000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Regulatory Assets And Liabilities DeferredTaxLiabilitiesRegulatoryAssetsAndLiabilities	13822000	USD
CY2014	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-34169000	USD
CY2015	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-47494000	USD
CY2016	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-40912000	USD
CY2014	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-1211000	USD
CY2015	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-1962000	USD
CY2016	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-3316000	USD
CY2016	us-gaap	Defined Benefit Plan Amount And Timing Of Assets Expected To Be Returned To Employer During Following12 Month Period DefinedBenefitPlanAmountAndTimingOfAssetsExpectedToBeReturnedToEmployerDuringFollowing12MonthPeriod	0
CY2016	us-gaap	Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Loss Net Gain Loss Before Tax DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeLossNetGainLossBeforeTax	0	USD
CY2016Q4	us-gaap	Defined Benefit Plan Benefits Paid DefinedBenefitPlanBenefitsPaid	18100000	USD
CY2016	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear	0.0725
CY2016	us-gaap	Defined Benefit Plan Narrative Description Of Basis Used To Determine Overall Expected Long Term Rate Of Return On Assets Assumption DefinedBenefitPlanNarrativeDescriptionOfBasisUsedToDetermineOverallExpectedLongTermRateOfReturnOnAssetsAssumption	We determine our overall expected long-term rate of return on plan assets, based on our review of historical returns and economic growth models. As of December 31, 2014, we updated our assumed mortality rates to incorporate the new set of mortality tables issued by the Society of Actuaries in October 2014. We determine our discount rates annually. We estimate our discount rate based upon a comparison of the expected cash flows associated with our future payments under our defined benefit pension and other postemployment obligations to a hypothetical bond portfolio created using high-quality bonds that closely match expected cash flows. Bond portfolios are developed by selecting a bond for each of the next 60 years based on the maturity dates of the bonds. Bonds selected to be included in the portfolios are only those rated by Moody’s as AA- or better and exclude callable bonds, bonds with less than a minimum issue size, yield outliers and other filtering criteria to remove unsuitable bonds.
CY2016	us-gaap	Defined Benefit Plan Target Plan Asset Allocations DefinedBenefitPlanTargetPlanAssetAllocations	1
CY2016	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate DefinedBenefitPlanUltimateHealthCareCostTrendRate	0.0500
CY2015Q4	us-gaap	Defined Benefit Plan Year That Rate Reaches Ultimate Trend Rate DefinedBenefitPlanYearThatRateReachesUltimateTrendRate	2022
CY2016Q4	us-gaap	Defined Benefit Plan Year That Rate Reaches Ultimate Trend Rate DefinedBenefitPlanYearThatRateReachesUltimateTrendRate	2022
CY2014	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
CY2015	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
CY2016	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
CY2014	us-gaap	Dividends Common Stock DividendsCommonStock	43696000	USD
CY2015	us-gaap	Dividends Common Stock DividendsCommonStock	62826000	USD
CY2016	us-gaap	Dividends Common Stock DividendsCommonStock	73209000	USD
CY2014	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.10
CY2015Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.15
CY2015Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
CY2015Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.14
CY2015Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.75
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.26
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.23
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.39
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.24
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.81
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.67
CY2014	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.07
CY2015Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.13
CY2015Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2014	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4400000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3500000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4300000	USD
CY2015Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14
CY2015Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.74
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.24
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.22
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.38
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.80
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.65
CY2014	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2015Q4	us-gaap	Goodwill Goodwill	157953000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	157953000	USD
CY2014	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2015	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2016	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2014	us-gaap	Gross Profit GrossProfit	826957000	USD
CY2015	us-gaap	Gross Profit GrossProfit	841733000	USD
CY2016	us-gaap	Gross Profit GrossProfit	885435000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	178128000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	192009000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	225338000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	68338000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	72979000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	85243000	USD
CY2015Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	38877000	USD
CY2016Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	1397000	USD
CY2014	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	62345000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	67203000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	78868000	USD
CY2014	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-58000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-338000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-783000	USD
CY2014	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6051000	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6114000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	7158000	USD
CY2014	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	44603000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-5423000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-35702000	USD
CY2014	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-6881000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-59635000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	27596000	USD
CY2014	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	21228000	USD
CY2015	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	5451000	USD
CY2016	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-8539000	USD
CY2014	us-gaap	Increase Decrease In Customer Deposits IncreaseDecreaseInCustomerDeposits	2643000	USD
CY2015	us-gaap	Increase Decrease In Customer Deposits IncreaseDecreaseInCustomerDeposits	322000	USD
CY2016	us-gaap	Increase Decrease In Customer Deposits IncreaseDecreaseInCustomerDeposits	884000	USD
CY2014	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	43800000	USD
CY2015	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-4923000	USD
CY2016	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-37480000	USD
CY2014	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	18743000	USD
CY2015	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	1000	USD
CY2016	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-19000	USD
CY2014	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	19172000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-43147000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-16721000	USD
CY2014	us-gaap	Increase Decrease In Materials And Supplies IncreaseDecreaseInMaterialsAndSupplies	-10868000	USD
CY2015	us-gaap	Increase Decrease In Materials And Supplies IncreaseDecreaseInMaterialsAndSupplies	5814000	USD
CY2016	us-gaap	Increase Decrease In Materials And Supplies IncreaseDecreaseInMaterialsAndSupplies	759000	USD
CY2014	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	45421000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	6147000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-24119000	USD
CY2014	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-10102000	USD
CY2015	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-15033000	USD
CY2016	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-25666000	USD
CY2014	us-gaap	Increase Decrease In Property And Other Taxes Payable IncreaseDecreaseInPropertyAndOtherTaxesPayable	12316000	USD
CY2015	us-gaap	Increase Decrease In Property And Other Taxes Payable IncreaseDecreaseInPropertyAndOtherTaxesPayable	-7493000	USD
CY2016	us-gaap	Increase Decrease In Property And Other Taxes Payable IncreaseDecreaseInPropertyAndOtherTaxesPayable	5322000	USD
CY2014	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-23044000	USD
CY2015	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-105886000	USD
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	80028000	USD
CY2014	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-30067000	USD
CY2015	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	-50658000	USD
CY2016	us-gaap	Increase Decrease In Regulatory Assets And Liabilities IncreaseDecreaseInRegulatoryAssetsAndLiabilities	49472000	USD
CY2014	us-gaap	Interest Expense InterestExpense	45842000	USD
CY2015	us-gaap	Interest Expense InterestExpense	44570000	USD
CY2016	us-gaap	Interest Expense InterestExpense	43739000	USD
CY2014	us-gaap	Interest Paid InterestPaid	21066000	USD
CY2015	us-gaap	Interest Paid InterestPaid	42980000	USD
CY2016	us-gaap	Interest Paid InterestPaid	42129000	USD
CY2015Q4	us-gaap	Interest Payable Current InterestPayableCurrent	18873000	USD
CY2016Q4	us-gaap	Interest Payable Current InterestPayableCurrent	18854000	USD
CY2014	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	5000000	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	5000000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	8600000	USD
CY2016Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	1500000	USD
CY2015Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4634765000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	773000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-314000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4942791000	USD
CY2015Q4	us-gaap	Liabilities Current LiabilitiesCurrent	304221000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	1200000000	USD
CY2015Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	7000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	443933000	USD
CY2015Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	0	USD
CY2016Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	0	USD
CY2016Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	553500000	USD
CY2015Q4	us-gaap	Long Term Debt LongTermDebt	1200000000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	239129000	USD
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	116073000	USD
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	43621000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	30892000	USD
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	78534000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	269120000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	26400000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	5600000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	3200000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	3600000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	4400000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	5200000	USD
CY2016Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	4400000	USD
CY2016Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	7000	USD
CY2015Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1191660000	USD
CY2016Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1192446000	USD
CY2015Q4	us-gaap	Materials Supplies And Other MaterialsSuppliesAndOther	33325000	USD
CY2016Q4	us-gaap	Materials Supplies And Other MaterialsSuppliesAndOther	34084000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	59212000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-109397000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	39242000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-297103000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-294320000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-308579000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	246663000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	394207000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	281567000	USD
CY2014	us-gaap	Net Income Loss NetIncomeLoss	109790000	USD
CY2015Q1	us-gaap	Net Income Loss NetIncomeLoss	60381000	USD
CY2015Q2	us-gaap	Net Income Loss NetIncomeLoss	12076000	USD
CY2015Q3	us-gaap	Net Income Loss NetIncomeLoss	7371000	USD
CY2015Q4	us-gaap	Net Income Loss NetIncomeLoss	39202000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	119030000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	64743000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	20300000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	12737000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	42315000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	140095000	USD
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	109790000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	119030000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	140095000	USD
CY2015Q4	us-gaap	Net Regulatory Assets NetRegulatoryAssets	435141000	USD
CY2016Q4	us-gaap	Net Regulatory Assets NetRegulatoryAssets	511746000	USD
CY2014	us-gaap	Operating Income Loss OperatingIncomeLoss	225294000	USD
CY2015Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	109005000	USD
CY2015Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	31270000	USD
CY2015Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	24951000	USD
CY2015Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	73903000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	-751000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	-315000	USD
CY2015Q4	us-gaap	Other Assets Current OtherAssetsCurrent	16789000	USD
CY2016Q4	us-gaap	Other Assets Current OtherAssetsCurrent	19257000	USD
CY2015Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	46193000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	43773000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	209000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-776000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Before Reclassifications Tax OtherComprehensiveIncomeLossBeforeReclassificationsTax	-130000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Before Reclassifications Tax OtherComprehensiveIncomeLossBeforeReclassificationsTax	486000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1781000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	1781000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-773000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	314000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	1244000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-483000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	197000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	-513000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax	-917000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	-564000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax	-462000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-198000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-353000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax	-289000	USD
CY2015Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	11700000	USD
CY2016Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	9451000	USD
CY2015Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	73235000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	76057000	USD
CY2014	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	2949000	USD
CY2015	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	2813000	USD
CY2016	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	1490000	USD
CY2014	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	1625000	USD
CY2015	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	263000	USD
CY2016	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	1447000	USD
CY2014	us-gaap	Payments For Removal Costs PaymentsForRemovalCosts	47125000	USD
CY2015	us-gaap	Payments For Removal Costs PaymentsForRemovalCosts	51608000	USD
CY2016	us-gaap	Payments For Removal Costs PaymentsForRemovalCosts	53430000	USD
CY2014	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	24122000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	24066000	USD
CY2014	us-gaap	Payments Of Dividends PaymentsOfDividends	43696000	USD
CY2015	us-gaap	Payments Of Dividends PaymentsOfDividends	62826000	USD
CY2016	us-gaap	Payments Of Dividends PaymentsOfDividends	73209000	USD
CY2014	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	11087000	USD
CY2015	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2016	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2014	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	297103000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	294320000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	309071000	USD
CY2015Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	272309000	USD
CY2016Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	303507000	USD
CY2016Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2016Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2014	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2001000	USD
CY2015	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	7051000	USD
CY2016	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	4017000	USD
CY2014	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1199994000	USD
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2014	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	42000000	USD
CY2015	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	-29500000	USD
CY2016	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	132500000	USD
CY2014	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2015	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	492000	USD
CY2014	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	7195000	USD
CY2015	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	4520000	USD
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	5427000	USD
CY2015Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	142153000	USD
CY2016Q4	us-gaap	Public Utilities Inventory PublicUtilitiesInventory	125432000	USD
CY2015Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	1620771000	USD
CY2016Q4	us-gaap	Public Utilities Property Plant And Equipment Accumulated Depreciation PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation	1672548000	USD
CY2015Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	3511911000	USD
CY2016Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	3731620000	USD
CY2015Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	5132682000	USD
CY2016Q4	us-gaap	Public Utilities Property Plant And Equipment Plant In Service PublicUtilitiesPropertyPlantAndEquipmentPlantInService	5404168000	USD
CY2016Q4	us-gaap	Ratio Of Indebtedness To Net Capital1 RatioOfIndebtednessToNetCapital1	0.41
CY2015Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	216343000	USD
CY2016Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	290944000	USD
CY2015	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-564000	USD
CY2016	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-462000	USD
CY2014	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	1818906000	USD
CY2015Q1	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	676531000	USD
CY2015Q2	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	256786000	USD
CY2015Q3	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	225226000	USD
CY2015Q4	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	389149000	USD
CY2015	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	1547692000	USD
CY2016Q1	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	508364000	USD
CY2016Q2	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	245923000	USD
CY2016Q3	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	232191000	USD
CY2016Q4	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	440754000	USD
CY2016	us-gaap	Regulated Operating Revenue Gas RegulatedOperatingRevenueGas	1427232000	USD
CY2015Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	32925000	USD
CY2016Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	83146000	USD
CY2015Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	435863000	USD
CY2016Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	440522000	USD
CY2016Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.0095
CY2014	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	9615000	USD
CY2015Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	24615000	USD
CY2016Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	11922000	USD
CY2015Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	95046000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	161021000	USD
CY2014	us-gaap	Segment Reporting Disclosure Of Major Customers SegmentReportingDisclosureOfMajorCustomers	0
CY2015	us-gaap	Segment Reporting Disclosure Of Major Customers SegmentReportingDisclosureOfMajorCustomers	0
CY2016	us-gaap	Segment Reporting Disclosure Of Major Customers SegmentReportingDisclosureOfMajorCustomers	0
CY2014	us-gaap	Share Based Compensation ShareBasedCompensation	7613000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	9187000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	11219000	USD
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	1100000	shares
CY2016Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	0	USD
CY2015Q4	us-gaap	Short Term Debt Weighted Average Interest Rate ShortTermDebtWeightedAverageInterestRate	0.007
CY2015	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	14663000	USD
CY2016	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	4219000	USD
CY2016Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	20000000	USD
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	1239023000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	1794037000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	1841555000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	1888280000	USD
CY2015Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	338781	shares
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	314745	shares
CY2015Q4	us-gaap	Treasury Stock Value TreasuryStockValue	14491000	USD
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	18126000	USD
CY2015	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	24122000	USD
CY2016	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	24066000	USD
CY2015Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	109600000	USD
CY2016Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	143200000	USD
CY2014	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	601663000	USD
CY2015	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	602604000	USD
CY2016	us-gaap	Utilities Operating Expense UtilitiesOperatingExpense	616315000	USD
CY2014	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	125722000	USD
CY2015	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	133023000	USD
CY2016	us-gaap	Utilities Operating Expense Depreciation And Amortization UtilitiesOperatingExpenseDepreciationAndAmortization	143829000	USD
CY2014	us-gaap	Utilities Operating Expense Gas And Petroleum Purchased UtilitiesOperatingExpenseGasAndPetroleumPurchased	991949000	USD
CY2015	us-gaap	Utilities Operating Expense Gas And Petroleum Purchased UtilitiesOperatingExpenseGasAndPetroleumPurchased	705959000	USD
CY2016	us-gaap	Utilities Operating Expense Gas And Petroleum Purchased UtilitiesOperatingExpenseGasAndPetroleumPurchased	541797000	USD
CY2014	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	420686000	USD
CY2015	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	414476000	USD
CY2016	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	417142000	USD
CY2014	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	55255000	USD
CY2015	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	55105000	USD
CY2016	us-gaap	Utilities Operating Expense Taxes UtilitiesOperatingExpenseTaxes	55344000	USD
CY2014	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	582000	shares
CY2015	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	676000	shares
CY2016	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	510000	shares
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	52946000	shares
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	53254000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	52963000	shares
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	52364000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	52578000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	52453000	shares
CY2016	us-gaap	Derivatives Reporting Of Derivative Activity DerivativesReportingOfDerivativeActivity	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Derivatives and Risk Management Activities</font><font style="font-family:inherit;font-size:10pt;"> - We record all derivative instruments at fair value, with the exception of normal purchases and normal sales that are expected to result in physical delivery. The accounting for changes in the fair value of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship and, if so, the reason for holding it, or if regulatory rulings require a different accounting treatment.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">If certain conditions are met, we may elect to designate a derivative instrument as a hedge of exposure to changes in fair values or cash flows.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The table below summarizes the various ways in which we account for our derivative instruments and the impact on our financial statements:</font></div><div style="line-height:120%;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="5" rowspan="1"></td></tr><tr><td style="width:23%;" rowspan="1" colspan="1"></td><td style="width:3%;" rowspan="1" colspan="1"></td><td style="width:35%;" rowspan="1" colspan="1"></td><td style="width:3%;" rowspan="1" colspan="1"></td><td style="width:36%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">Recognition and Measurement</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">Accounting Treatment</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;"> </font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">Balance Sheet</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;"> </font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:center;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;font-weight:bold;">Income Statement</font></div></td></tr><tr><td style="vertical-align:top;border-bottom:2px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="vertical-align:top;text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;vertical-align:top;">Normal purchases and</font></div><div style="vertical-align:top;text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;vertical-align:top;">normal sales</font></div></td><td style="vertical-align:top;border-bottom:2px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">-</font></div></td><td style="vertical-align:top;border-bottom:2px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Fair value not recorded</font></div></td><td style="vertical-align:top;border-bottom:2px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">-</font></div></td><td style="vertical-align:top;border-bottom:2px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Change in fair value not recognized in earnings</font></div></td></tr><tr><td style="vertical-align:top;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Mark-to-market</font></div></td><td style="vertical-align:top;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">-</font></div></td><td style="vertical-align:top;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Recorded at fair value</font></div></td><td style="vertical-align:top;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">-</font></div></td><td style="vertical-align:top;border-bottom:2px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">Change in fair value recognized in, and</font></div><div style="text-align:left;font-size:9pt;"><font style="font-family:inherit;font-size:9pt;">recoverable through, the purchased-gas cost adjustment mechanisms</font></div></td></tr></table></div></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We have not elected to formally designate any of our derivative instruments as hedges. Gains or losses associated with the fair value of commodity derivative instruments entered into by us are included in, and recoverable through, the purchased-gas cost adjustment mechanisms.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">See Note 7 for additional information regarding our fair value measurements and hedging activities using derivatives.</font></div></div>
CY2016	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Use of Estimates</font><font style="font-family:inherit;font-size:10pt;"> - The preparation of our financial statements and related disclosures in accordance with GAAP requires us to make estimates and assumptions with respect to values or conditions that cannot be known with certainty that affect the reported amount of assets and liabilities, and the disclosure of contingent assets and liabilities at the date of the financial statements. These estimates and assumptions also affect the reported amounts of revenue and expenses during the reporting period. Items that may be estimated include, but are not limited to, the economic useful life of assets, fair value of assets and liabilities, provisions for doubtful accounts receivable, unbilled revenues for natural gas delivered but for which meters have not been read, natural gas purchased but for which no invoice has been received, provision for income taxes, including any deferred tax valuation allowances, the results of litigation and various other recorded or disclosed amounts.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We evaluate these estimates on an ongoing basis using historical experience and other methods we consider reasonable based on the particular circumstances. Nevertheless, actual results may differ significantly from the estimates. Any effects on our financial position or results of operations from revisions to these estimates are recorded in the period when the facts that give rise to the revision become known.</font></div></div>

Files In Submission

Name	View Source	Status
0001587732-17-000011-index-headers.html	Edgar Link	pending
0001587732-17-000011-index.html	Edgar Link	pending
0001587732-17-000011.txt	Edgar Link	pending
0001587732-17-000011-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
ogs-20161231.xml	Edgar Link	completed
ogs-20161231.xsd	Edgar Link	pending
ogs-20161231_cal.xml	Edgar Link	unprocessable
ogs-20161231_def.xml	Edgar Link	unprocessable
ogs-20161231_lab.xml	Edgar Link	unprocessable
ogs-20161231_pre.xml	Edgar Link	unprocessable
ogs10-k2016exhibit1015.htm	Edgar Link	pending
ogs10-k2016exhibit1016.htm	Edgar Link	pending
ogs10-k2016exhibit1019.htm	Edgar Link	pending
ogs10-k2016exhibit105.htm	Edgar Link	pending
ogs10-k2016exhibit121.htm	Edgar Link	pending
ogs10-k2016exhibit211.htm	Edgar Link	pending
ogs10-k2016exhibit231.htm	Edgar Link	pending
ogs10-k2016exhibit311.htm	Edgar Link	pending
ogs10-k2016exhibit312.htm	Edgar Link	pending
ogs10-k2016exhibit321.htm	Edgar Link	pending
ogs10-k2016exhibit322.htm	Edgar Link	pending
onegas10-k2016.htm	Edgar Link	pending
performancegraph.jpg	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$OGS
ONE Gas, Inc. Stock $ogs

2016 Q4 Form 10-K Financial Statement

#000158773217000011 Filed on February 23, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$OGS ONE Gas, Inc. Stock $ogs

2016 Q4 Form 10-K Financial Statement

#000158773217000011 Filed on February 23, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$OGS
ONE Gas, Inc. Stock $ogs