2017 Q3 Form 10-K Financial Statement
#000007014518000022 Filed on November 16, 2018
Income Statement
| Concept | 2017 Q3 | 2017 Q2 | 2017 Q1 |
|---|---|---|---|
| Revenue | $286.9M | $348.4M | $522.1M |
| YoY Change | -1.9% | 3.8% | 16.25% |
| Cost Of Revenue | $10.90M | $46.10M | $148.0M |
| YoY Change | 1262.5% | 96.17% | 81.37% |
| Gross Profit | $276.0M | $302.3M | $374.1M |
| YoY Change | -5.38% | -3.14% | 1.8% |
| Gross Profit Margin | 96.19% | 86.78% | 71.66% |
| Selling, General & Admin | |||
| YoY Change | |||
| % of Gross Profit | |||
| Research & Development | |||
| YoY Change | |||
| % of Gross Profit | |||
| Depreciation & Amortization | $55.40M | $55.62M | $57.00M |
| YoY Change | -1.25% | -5.42% | -10.87% |
| % of Gross Profit | 20.07% | 18.4% | 15.24% |
| Operating Expenses | $147.7M | $225.0M | $352.1M |
| YoY Change | -16.84% | -22.53% | -48.68% |
| Operating Profit | $87.40M | $123.4M | $170.0M |
| YoY Change | 7.57% | 173.14% | -171.71% |
| Interest Expense | -$32.80M | -$29.20M | -$29.40M |
| YoY Change | 19.27% | -1.68% | -2.0% |
| % of Operating Profit | -37.53% | -23.67% | -17.3% |
| Other Income/Expense, Net | -$34.50M | $1.400M | $1.700M |
| YoY Change | -1289.66% | -6.67% | -46.88% |
| Pretax Income | $61.10M | $95.51M | $142.3M |
| YoY Change | 7.95% | 460.94% | -153.94% |
| Income Tax | $15.50M | $35.79M | $52.97M |
| % Of Pretax Income | 25.37% | 37.48% | 37.24% |
| Net Earnings | $45.58M | $59.71M | $89.28M |
| YoY Change | 21.37% | 620.66% | -160.45% |
| Net Earnings / Revenue | 15.88% | 17.14% | 17.1% |
| Basic Earnings Per Share | $0.53 | $0.70 | $1.05 |
| Diluted Earnings Per Share | $0.53 | $0.69 | $1.04 |
| COMMON SHARES | |||
| Basic Shares Outstanding | 85.51M shares | 85.42M shares | 85.33M shares |
| Diluted Shares Outstanding | 86.06M shares | 86.01M shares |
Balance Sheet
| Concept | 2017 Q3 | 2017 Q2 | 2017 Q1 |
|---|---|---|---|
| SHORT-TERM ASSETS | |||
| Cash & Short-Term Investments | $555.5M | $285.3M | $231.2M |
| YoY Change | 327.31% | 170.17% | 146.74% |
| Cash & Equivalents | $555.5M | $285.3M | $231.2M |
| Short-Term Investments | |||
| Other Short-Term Assets | $51.51M | $50.85M | $51.59M |
| YoY Change | -13.22% | 7.92% | -9.04% |
| Inventory | $69.60M | $52.50M | $43.70M |
| Prepaid Expenses | |||
| Receivables | $112.4M | $127.9M | $171.2M |
| Other Receivables | $9.700M | $9.600M | $5.200M |
| Total Short-Term Assets | $818.3M | $542.2M | $556.9M |
| YoY Change | 98.12% | 50.14% | 47.92% |
| LONG-TERM ASSETS | |||
| Property, Plant & Equipment | $4.674B | $4.584B | $4.519B |
| YoY Change | 4.93% | 3.05% | -1.16% |
| Goodwill | $5.476M | $5.476M | $5.476M |
| YoY Change | 0.0% | 0.0% | 0.0% |
| Intangibles | |||
| YoY Change | |||
| Long-Term Investments | $125.3M | $126.5M | $117.3M |
| YoY Change | 13.19% | 13.55% | 12.46% |
| Other Assets | $742.0K | $479.0K | $485.0K |
| YoY Change | 22.85% | 312.93% | 208.92% |
| Total Long-Term Assets | $611.0M | $741.8M | $728.7M |
| YoY Change | -20.54% | 1.3% | -14.51% |
| TOTAL ASSETS | |||
| Total Short-Term Assets | $818.3M | $542.2M | $556.9M |
| Total Long-Term Assets | $611.0M | $741.8M | $728.7M |
| Total Assets | $6.103B | $5.868B | $5.805B |
| YoY Change | 8.28% | 5.89% | 0.06% |
| SHORT-TERM LIABILITIES | |||
| YoY Change | |||
| Accounts Payable | $126.4M | $98.84M | $111.4M |
| YoY Change | 17.02% | 14.29% | 0.3% |
| Accrued Expenses | $111.9M | $34.18M | $33.17M |
| YoY Change | 240.0% | 37.58% | 37.97% |
| Deferred Revenue | |||
| YoY Change | |||
| Short-Term Debt | $0.00 | $0.00 | $0.00 |
| YoY Change | |||
| Long-Term Debt Due | $300.0M | $300.0M | $0.00 |
| YoY Change | |||
| Total Short-Term Liabilities | $646.0M | $602.1M | $325.9M |
| YoY Change | 112.7% | 117.9% | -7.58% |
| LONG-TERM LIABILITIES | |||
| Long-Term Debt | $2.084B | $1.788B | $2.087B |
| YoY Change | -0.12% | -14.28% | 0.11% |
| Other Long-Term Liabilities | $778.6M | $911.8M | $903.0M |
| YoY Change | -13.06% | 8.08% | 0.79% |
| Total Long-Term Liabilities | $1.670B | $1.793B | $1.740B |
| YoY Change | -2.88% | 8.59% | -0.04% |
| TOTAL LIABILITIES | |||
| Total Short-Term Liabilities | $646.0M | $602.1M | $325.9M |
| Total Long-Term Liabilities | $1.670B | $1.793B | $1.740B |
| Total Liabilities | $2.316B | $2.396B | $2.066B |
| YoY Change | 14.47% | 24.26% | -1.31% |
| SHAREHOLDERS EQUITY | |||
| Retained Earnings | $851.7M | $841.6M | $817.3M |
| YoY Change | 25.92% | 25.0% | 16.86% |
| Common Stock | $85.54M | $85.47M | $85.38M |
| YoY Change | 0.5% | 0.61% | 0.57% |
| Preferred Stock | |||
| YoY Change | |||
| Treasury Stock (at cost) | |||
| YoY Change | |||
| Treasury Stock Shares | |||
| Shareholders Equity | $1.704B | $1.684B | $1.651B |
| YoY Change | |||
| Total Liabilities & Shareholders Equity | $6.103B | $5.868B | $5.805B |
| YoY Change | 8.28% | 5.89% | 0.06% |
Cashflow Statement
| Concept | 2017 Q3 | 2017 Q2 | 2017 Q1 |
|---|---|---|---|
| OPERATING ACTIVITIES | |||
| Net Income | $45.58M | $59.71M | $89.28M |
| YoY Change | 21.37% | 620.66% | -160.45% |
| Depreciation, Depletion And Amortization | $55.40M | $55.62M | $57.00M |
| YoY Change | -1.25% | -5.42% | -10.87% |
| Cash From Operating Activities | $133.4M | $199.2M | $207.3M |
| YoY Change | 3.41% | 35.33% | 4.33% |
| INVESTING ACTIVITIES | |||
| Capital Expenditures | -$135.5M | -$106.6M | -$102.1M |
| YoY Change | 35.77% | -13.19% | -40.85% |
| Acquisitions | |||
| YoY Change | |||
| Other Investing Activities | $11.40M | -$6.900M | $21.80M |
| YoY Change | -52.5% | -139.66% | -76.28% |
| Cash From Investing Activities | -$124.2M | -$113.5M | -$80.30M |
| YoY Change | 63.85% | 7.69% | -0.5% |
| FINANCING ACTIVITIES | |||
| Cash Dividend Paid | |||
| YoY Change | |||
| Common Stock Issuance & Retirement, Net | |||
| YoY Change | |||
| Debt Paid & Issued, Net | |||
| YoY Change | |||
| Cash From Financing Activities | 261.3M | -31.60M | -32.30M |
| YoY Change | -1007.29% | 5.69% | -46.79% |
| NET CHANGE | |||
| Cash From Operating Activities | 133.4M | 199.2M | 207.3M |
| Cash From Investing Activities | -124.2M | -113.5M | -80.30M |
| Cash From Financing Activities | 261.3M | -31.60M | -32.30M |
| Net Change In Cash | 270.5M | 54.10M | 94.70M |
| YoY Change | 1008.61% | 354.62% | 65.27% |
| FREE CASH FLOW | |||
| Cash From Operating Activities | $133.4M | $199.2M | $207.3M |
| Capital Expenditures | -$135.5M | -$106.6M | -$102.1M |
| Free Cash Flow | $268.9M | $305.8M | $309.4M |
| YoY Change | 17.53% | 13.26% | -16.67% |
Facts In Submission
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1739000 | USD |
| CY2017Q3 | nfg |
Other Investments Including Csv Life Insurance And Avail For Sale
OtherInvestmentsIncludingCsvLifeInsuranceAndAvailForSale
|
125265000 | USD |
| CY2018Q3 | nfg |
Other Investments Including Csv Life Insurance And Avail For Sale
OtherInvestmentsIncludingCsvLifeInsuranceAndAvailForSale
|
132545000 | USD |
| CY2017 | nfg |
Percentof Well Locations Developed With Net Pud Reserves
PercentofWellLocationsDevelopedWithNetPUDReserves
|
0.41 | |
| CY2018 | nfg |
Percentof Well Locations Developed With Net Pud Reserves
PercentofWellLocationsDevelopedWithNetPUDReserves
|
0.62 | |
| CY2018Q3 | nfg |
Project Costs
ProjectCosts
|
76200000 | USD |
| CY2017Q3 | nfg |
Proved Undeveloped Reserves Additions
ProvedUndevelopedReservesAdditions
|
269000000000 | ft3 |
| CY2018Q3 | nfg |
Proved Undeveloped Reserves Additions
ProvedUndevelopedReservesAdditions
|
431000000000 | ft3 |
| CY2016 | nfg |
Proved Undeveloped Reserves As Percentage Of Total Proved Reserves
ProvedUndevelopedReservesAsPercentageOfTotalProvedReserves
|
0.29 | |
| CY2017 | nfg |
Proved Undeveloped Reserves As Percentage Of Total Proved Reserves
ProvedUndevelopedReservesAsPercentageOfTotalProvedReserves
|
0.28 | |
| CY2018 | nfg |
Proved Undeveloped Reserves As Percentage Of Total Proved Reserves
ProvedUndevelopedReservesAsPercentageOfTotalProvedReserves
|
0.30 | |
| CY2017Q3 | nfg |
Proved Undeveloped Reserves Conversions To Developed Reserves
ProvedUndevelopedReservesConversionsToDevelopedReserves
|
159000000000 | ft3 |
| CY2018Q3 | nfg |
Proved Undeveloped Reserves Conversions To Developed Reserves
ProvedUndevelopedReservesConversionsToDevelopedReserves
|
284000000000 | ft3 |
| CY2017Q3 | nfg |
Proved Undeveloped Reserves Increase
ProvedUndevelopedReservesIncrease
|
69000000000 | ft3 |
| CY2018Q3 | nfg |
Proved Undeveloped Reserves Increase
ProvedUndevelopedReservesIncrease
|
145000000000 | ft3 |
| CY2014Q3 | nfg |
Proved Undeveloped Reserves Percentage
ProvedUndevelopedReservesPercentage
|
0.51 | |
| CY2015Q3 | nfg |
Proved Undeveloped Reserves Percentage
ProvedUndevelopedReservesPercentage
|
0.33 | |
| CY2016Q3 | nfg |
Proved Undeveloped Reserves Percentage
ProvedUndevelopedReservesPercentage
|
0.25 | |
| CY2017Q3 | nfg |
Proved Undeveloped Reserves Percentage
ProvedUndevelopedReservesPercentage
|
0.27 | |
| CY2018Q3 | nfg |
Proved Undeveloped Reserves Percentage
ProvedUndevelopedReservesPercentage
|
0.46 | |
| CY2017Q3 | nfg |
Proved Undeveloped Reserves Removed
ProvedUndevelopedReservesRemoved
|
54000000000 | ft3 |
| CY2018Q3 | nfg |
Proved Undeveloped Reserves Removed
ProvedUndevelopedReservesRemoved
|
5000000000 | ft3 |
| CY2018Q3 | nfg |
Proved Undeveloped Reserves Sales
ProvedUndevelopedReservesSales
|
57000000000 | ft3 |
| CY2017Q3 | nfg |
Proved Undeveloped Reserves Upward Revisions
ProvedUndevelopedReservesUpwardRevisions
|
13000000000 | ft3 |
| CY2018Q3 | nfg |
Proved Undeveloped Reserves Upward Revisions
ProvedUndevelopedReservesUpwardRevisions
|
60000000000 | ft3 |
| CY2017Q3 | nfg |
Recoverable Future Taxes
RecoverableFutureTaxes
|
181363000 | USD |
| CY2018Q3 | nfg |
Recoverable Future Taxes
RecoverableFutureTaxes
|
115460000 | USD |
| CY2018 | nfg |
Reduction In Deferred Taxes Rate Regulated Activities Impact Of Change In Corporate Tax Rate
ReductionInDeferredTaxesRateRegulatedActivitiesImpactOfChangeInCorporateTaxRate
|
336700000 | USD |
| CY2016 | nfg |
Results Of Operations Franchise Or Ad Valorem Taxes
ResultsOfOperationsFranchiseOrAdValoremTaxes
|
13794000 | USD |
| CY2017 | nfg |
Results Of Operations Franchise Or Ad Valorem Taxes
ResultsOfOperationsFranchiseOrAdValoremTaxes
|
15372000 | USD |
| CY2018 | nfg |
Results Of Operations Franchise Or Ad Valorem Taxes
ResultsOfOperationsFranchiseOrAdValoremTaxes
|
14355000 | USD |
| CY2016 | nfg |
Results Of Operations Sales Revenue To Affiliated Enterprises
ResultsOfOperationsSalesRevenueToAffiliatedEnterprises
|
0 | USD |
| CY2017 | nfg |
Results Of Operations Sales Revenue To Affiliated Enterprises
ResultsOfOperationsSalesRevenueToAffiliatedEnterprises
|
0 | USD |
| CY2018 | nfg |
Results Of Operations Sales Revenue To Affiliated Enterprises
ResultsOfOperationsSalesRevenueToAffiliatedEnterprises
|
0 | USD |
| CY2016 | nfg |
Resultsof Operations Purchased Emission Allowance Expense
ResultsofOperationsPurchasedEmissionAllowanceExpense
|
700000 | USD |
| CY2017 | nfg |
Resultsof Operations Purchased Emission Allowance Expense
ResultsofOperationsPurchasedEmissionAllowanceExpense
|
1391000 | USD |
| CY2018 | nfg |
Resultsof Operations Purchased Emission Allowance Expense
ResultsofOperationsPurchasedEmissionAllowanceExpense
|
1883000 | USD |
| CY2017Q3 | nfg |
Taxes Refundable To Customers
TaxesRefundableToCustomers
|
95739000 | USD |
| CY2018Q3 | nfg |
Taxes Refundable To Customers
TaxesRefundableToCustomers
|
370628000 | USD |
| CY2018 | nfg |
Temporary Ratefor Customer Refunds
TemporaryRateforCustomerRefunds
|
0.022 | |
| CY2017 | nfg |
Well Locations Developed With Net Pud Reserves
WellLocationsDevelopedWithNetPUDReserves
|
37 | |
| CY2018 | nfg |
Well Locations Developed With Net Pud Reserves
WellLocationsDevelopedWithNetPUDReserves
|
53 | |
| CY2016 | srt |
Decrease Due To Sales Of Minerals In Place
DecreaseDueToSalesOfMineralsInPlace
|
95849000 | USD |
| CY2017 | srt |
Decrease Due To Sales Of Minerals In Place
DecreaseDueToSalesOfMineralsInPlace
|
9849000 | USD |
| CY2018 | srt |
Decrease Due To Sales Of Minerals In Place
DecreaseDueToSalesOfMineralsInPlace
|
100816000 | USD |
| CY2016 | srt |
Extensions Discoveries Additions And Improved Recovery Less Related Costs
ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts
|
47742000 | USD |
| CY2017 | srt |
Extensions Discoveries Additions And Improved Recovery Less Related Costs
ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts
|
170500000 | USD |
| CY2018 | srt |
Extensions Discoveries Additions And Improved Recovery Less Related Costs
ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts
|
212494000 | USD |
| CY2016Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows
FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows
|
3768463000 | USD |
| CY2017Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows
FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows
|
6144317000 | USD |
| CY2018Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows
FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows
|
7822855000 | USD |
| CY2016Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs
FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts
|
375152000 | USD |
| CY2017Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs
FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts
|
411578000 | USD |
| CY2018Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs
FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts
|
559707000 | USD |
| CY2016Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense
FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense
|
303397000 | USD |
| CY2017Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense
FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense
|
1160469000 | USD |
| CY2018Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense
FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense
|
1125910000 | USD |
| CY2016Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows
FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows
|
1094998000 | USD |
| CY2016Q3 | us-gaap |
Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
|
-5640000 | USD |
| CY2017Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows
FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows
|
2194008000 | USD |
| CY2018Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows
FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows
|
3530827000 | USD |
| CY2016Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs
FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts
|
1994916000 | USD |
| CY2017Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs
FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts
|
2378262000 | USD |
| CY2018Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs
FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts
|
2606411000 | USD |
| CY2016Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows
FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows
|
452470000 | USD |
| CY2017Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows
FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows
|
1080962000 | USD |
| CY2018Q3 | srt |
Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows
FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows
|
1810522000 | USD |
| CY2016 | srt |
Increase Decrease In Estimated Future Development Costs
IncreaseDecreaseInEstimatedFutureDevelopmentCosts
|
143752000 | USD |
| CY2017 | srt |
Increase Decrease In Estimated Future Development Costs
IncreaseDecreaseInEstimatedFutureDevelopmentCosts
|
8816000 | USD |
| CY2018 | srt |
Increase Decrease In Estimated Future Development Costs
IncreaseDecreaseInEstimatedFutureDevelopmentCosts
|
-43771000 | USD |
| CY2016 | srt |
Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves
IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves
|
387739000 | USD |
| CY2017 | srt |
Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves
IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves
|
-393353000 | USD |
| CY2018 | srt |
Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves
IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves
|
55558000 | USD |
| CY2016 | srt |
Net Increase Decrease In Sales And Transfer Prices And Production Costs
NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts
|
-1066593000 | USD |
| CY2017 | srt |
Net Increase Decrease In Sales And Transfer Prices And Production Costs
NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts
|
828187000 | USD |
| CY2018 | srt |
Net Increase Decrease In Sales And Transfer Prices And Production Costs
NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts
|
541021000 | USD |
| CY2016 | srt |
Previously Estimated Development Costs Incurred
PreviouslyEstimatedDevelopmentCostsIncurred
|
92840000 | USD |
| CY2017 | srt |
Previously Estimated Development Costs Incurred
PreviouslyEstimatedDevelopmentCostsIncurred
|
101134000 | USD |
| CY2018 | srt |
Previously Estimated Development Costs Incurred
PreviouslyEstimatedDevelopmentCostsIncurred
|
182348000 | USD |
| CY2016Q3 | srt |
Proved Undeveloped Reserve Volume
ProvedUndevelopedReserveVolume
|
543000000000 | ft3 |
| CY2017Q3 | srt |
Proved Undeveloped Reserve Volume
ProvedUndevelopedReserveVolume
|
612000000000 | ft3 |
| CY2018Q3 | srt |
Proved Undeveloped Reserve Volume
ProvedUndevelopedReserveVolume
|
757000000000 | ft3 |
| CY2016 | srt |
Revisions Of Previous Quantity Estimates
RevisionsOfPreviousQuantityEstimates
|
6202000 | USD |
| CY2017 | srt |
Revisions Of Previous Quantity Estimates
RevisionsOfPreviousQuantityEstimates
|
39078000 | USD |
| CY2018 | srt |
Revisions Of Previous Quantity Estimates
RevisionsOfPreviousQuantityEstimates
|
61363000 | USD |
| CY2016 | srt |
Sales And Transfers Of Oil And Gas Produced Net Of Production Costs
SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts
|
-218444000 | USD |
| CY2017 | srt |
Sales And Transfers Of Oil And Gas Produced Net Of Production Costs
SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts
|
-345075000 | USD |
| CY2018 | srt |
Sales And Transfers Of Oil And Gas Produced Net Of Production Costs
SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts
|
-381775000 | USD |
| CY2016 | srt |
Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount
StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount
|
22105000 | USD |
| CY2017 | srt |
Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount
StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount
|
71080000 | USD |
| CY2018 | srt |
Standardized Measure Of Discounted Future Net Cash Flow Relating To Proved Oil And Gas Reserves Accretion Of Discount
StandardizedMeasureOfDiscountedFutureNetCashFlowRelatingToProvedOilAndGasReservesAccretionOfDiscount
|
80837000 | USD |
| CY2015Q3 | srt |
Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves
StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves
|
1323034000 | USD |
| CY2016Q3 | srt |
Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves
StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves
|
642528000 | USD |
| CY2017Q3 | srt |
Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves
StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves
|
1113046000 | USD |
| CY2018Q3 | srt |
Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves
StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves
|
1720305000 | USD |
| CY2017Q3 | us-gaap |
Accounts Payable Current
AccountsPayableCurrent
|
126443000 | USD |
| CY2018Q3 | us-gaap |
Accounts Payable Current
AccountsPayableCurrent
|
160031000 | USD |
| CY2017Q3 | us-gaap |
Accounts Receivable Gross Current
AccountsReceivableGrossCurrent
|
22883000 | USD |
| CY2018Q3 | us-gaap |
Accounts Receivable Gross Current
AccountsReceivableGrossCurrent
|
24182000 | USD |
| CY2017Q3 | us-gaap |
Accrued Liabilities Current
AccruedLiabilitiesCurrent
|
111889000 | USD |
| CY2018Q3 | us-gaap |
Accrued Liabilities Current
AccruedLiabilitiesCurrent
|
132693000 | USD |
| CY2017Q3 | us-gaap |
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
|
5271486000 | USD |
| CY2018Q3 | us-gaap |
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
|
5462696000 | USD |
| CY2016 | us-gaap |
Acquisition Costs
AcquisitionCosts
|
0 | USD |
| CY2017Q3 | us-gaap |
Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
|
-30123000 | USD |
| CY2018Q3 | us-gaap |
Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
|
-67750000 | USD |
| CY2017 | us-gaap |
Acquisition Costs
AcquisitionCosts
|
0 | USD |
| CY2018 | us-gaap |
Acquisition Costs
AcquisitionCosts
|
0 | USD |
| CY2017Q3 | us-gaap |
Additional Paid In Capital
AdditionalPaidInCapital
|
796646000 | USD |
| CY2018Q3 | us-gaap |
Additional Paid In Capital
AdditionalPaidInCapital
|
820223000 | USD |
| CY2016 | us-gaap |
Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation
AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
|
1900000 | USD |
| CY2016 | us-gaap |
Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
|
4800000 | USD |
| CY2017 | us-gaap |
Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
|
10800000 | USD |
| CY2018 | us-gaap |
Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
|
14200000 | USD |
| CY2017Q3 | us-gaap |
Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
|
22526000 | USD |
| CY2018Q3 | us-gaap |
Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
|
24537000 | USD |
| CY2016 | us-gaap |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
|
431408 | shares |
| CY2017 | us-gaap |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
|
157649 | shares |
| CY2018 | us-gaap |
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
|
317899 | shares |
| CY2015Q3 | us-gaap |
Asset Retirement Obligation
AssetRetirementObligation
|
156805000 | USD |
| CY2016Q3 | us-gaap |
Asset Retirement Obligation
AssetRetirementObligation
|
112330000 | USD |
| CY2017Q3 | us-gaap |
Asset Retirement Obligation
AssetRetirementObligation
|
106395000 | USD |
| CY2018Q3 | us-gaap |
Asset Retirement Obligation
AssetRetirementObligation
|
108235000 | USD |
| CY2016 | us-gaap |
Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
|
8300000 | USD |
| CY2017 | us-gaap |
Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
|
6647000 | USD |
| CY2018 | us-gaap |
Asset Retirement Obligation Accretion Expense
AssetRetirementObligationAccretionExpense
|
9520000 | USD |
| CY2016 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
2719000 | USD |
| CY2017 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
2963000 | USD |
| CY2018 | us-gaap |
Asset Retirement Obligation Liabilities Incurred
AssetRetirementObligationLiabilitiesIncurred
|
5597000 | USD |
| CY2016 | us-gaap |
Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
|
72215000 | USD |
| CY2017 | us-gaap |
Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
|
4967000 | USD |
| CY2018 | us-gaap |
Asset Retirement Obligation Liabilities Settled
AssetRetirementObligationLiabilitiesSettled
|
12858000 | USD |
| CY2016 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
16721000 | USD |
| CY2017 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
-10578000 | USD |
| CY2018 | us-gaap |
Asset Retirement Obligation Revision Of Estimate
AssetRetirementObligationRevisionOfEstimate
|
-419000 | USD |
| CY2017Q3 | us-gaap |
Asset Retirement Obligations Noncurrent
AssetRetirementObligationsNoncurrent
|
106395000 | USD |
| CY2018Q3 | us-gaap |
Asset Retirement Obligations Noncurrent
AssetRetirementObligationsNoncurrent
|
108235000 | USD |
| CY2016Q3 | us-gaap |
Assets
Assets
|
5636387000 | USD |
| CY2017Q3 | us-gaap |
Assets
Assets
|
6103320000 | USD |
| CY2018Q3 | us-gaap |
Assets
Assets
|
6036486000 | USD |
| CY2017Q3 | us-gaap |
Assets Current
AssetsCurrent
|
818280000 | USD |
| CY2018Q3 | us-gaap |
Assets Current
AssetsCurrent
|
544591000 | USD |
| CY2017Q3 | us-gaap |
Assets Noncurrent
AssetsNoncurrent
|
610966000 | USD |
| CY2018Q3 | us-gaap |
Assets Noncurrent
AssetsNoncurrent
|
514752000 | USD |
| CY2016 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
60434000 | USD |
| CY2017 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
72216000 | USD |
| CY2018 | us-gaap |
Capital Expenditures Incurred But Not Yet Paid
CapitalExpendituresIncurredButNotYetPaid
|
88813000 | USD |
| CY2017Q3 | us-gaap |
Capitalization Longterm Debt And Equity
CapitalizationLongtermDebtAndEquity
|
3787416000 | USD |
| CY2017Q3 | us-gaap |
Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities
CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities
|
3765710000 | USD |
| CY2016 | us-gaap |
Cash And Cash Equivalents Period Increase Decrease
CashAndCashEquivalentsPeriodIncreaseDecrease
|
16376000 | USD |
| CY2018Q3 | us-gaap |
Capitalization Longterm Debt And Equity
CapitalizationLongtermDebtAndEquity
|
4068695000 | USD |
| CY2018Q3 | us-gaap |
Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities
CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities
|
3862687000 | USD |
| CY2017Q3 | us-gaap |
Capitalized Costs Asset Retirement Costs
CapitalizedCostsAssetRetirementCosts
|
54400000 | USD |
| CY2018Q3 | us-gaap |
Capitalized Costs Asset Retirement Costs
CapitalizedCostsAssetRetirementCosts
|
44300000 | USD |
| CY2016 | us-gaap |
Capitalized Costs Of Unproved Properties Excluded From Amortization
CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization
|
10563000 | USD |
| CY2017 | us-gaap |
Capitalized Costs Of Unproved Properties Excluded From Amortization
CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization
|
268000 | USD |
| CY2018 | us-gaap |
Capitalized Costs Of Unproved Properties Excluded From Amortization
CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortization
|
11135000 | USD |
| CY2017Q3 | us-gaap |
Capitalized Costs Oil And Gas Producing Activities Gross
CapitalizedCostsOilAndGasProducingActivitiesGross
|
4913233000 | USD |
| CY2018Q3 | us-gaap |
Capitalized Costs Oil And Gas Producing Activities Gross
CapitalizedCostsOilAndGasProducingActivitiesGross
|
5176987000 | USD |
| CY2017Q3 | us-gaap |
Capitalized Costs Oil And Gas Producing Activities Net
CapitalizedCostsOilAndGasProducingActivitiesNet
|
1147523000 | USD |
| CY2018Q3 | us-gaap |
Capitalized Costs Oil And Gas Producing Activities Net
CapitalizedCostsOilAndGasProducingActivitiesNet
|
1314300000 | USD |
| CY2017Q3 | us-gaap |
Capitalized Costs Proved Properties
CapitalizedCostsProvedProperties
|
4832301000 | USD |
| CY2018Q3 | us-gaap |
Capitalized Costs Proved Properties
CapitalizedCostsProvedProperties
|
5114753000 | USD |
| CY2017Q3 | us-gaap |
Capitalized Costs Unproved Properties
CapitalizedCostsUnprovedProperties
|
80932000 | USD |
| CY2018Q3 | us-gaap |
Capitalized Costs Unproved Properties
CapitalizedCostsUnprovedProperties
|
62234000 | USD |
| CY2015Q3 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
113596000 | USD |
| CY2016Q3 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
129972000 | USD |
| CY2017Q3 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
555530000 | USD |
| CY2018Q3 | us-gaap |
Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
|
229606000 | USD |
| CY2017Q3 | us-gaap |
Cash And Cash Equivalents Fair Value Disclosure
CashAndCashEquivalentsFairValueDisclosure
|
527978000 | USD |
| CY2018Q3 | us-gaap |
Cash And Cash Equivalents Fair Value Disclosure
CashAndCashEquivalentsFairValueDisclosure
|
215272000 | USD |
| CY2017 | us-gaap |
Cash And Cash Equivalents Period Increase Decrease
CashAndCashEquivalentsPeriodIncreaseDecrease
|
425558000 | USD |
| CY2018 | us-gaap |
Cash And Cash Equivalents Period Increase Decrease
CashAndCashEquivalentsPeriodIncreaseDecrease
|
-325924000 | USD |
| CY2018 | us-gaap |
Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months
CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
|
-23700000 | USD |
| CY2017Q3 | us-gaap |
Cash Surrender Value Of Life Insurance
CashSurrenderValueOfLifeInsurance
|
39355000 | USD |
| CY2018Q3 | us-gaap |
Cash Surrender Value Of Life Insurance
CashSurrenderValueOfLifeInsurance
|
39970000 | USD |
| CY2017Q3 | us-gaap |
Commercial Paper At Carrying Value
CommercialPaperAtCarryingValue
|
0 | USD |
| CY2018Q3 | us-gaap |
Commercial Paper At Carrying Value
CommercialPaperAtCarryingValue
|
0 | USD |
| CY2017Q3 | us-gaap |
Commitments And Contingencies
CommitmentsAndContingencies
|
0 | USD |
| CY2018Q3 | us-gaap |
Commitments And Contingencies
CommitmentsAndContingencies
|
0 | USD |
| CY2016 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
1.60 | |
| CY2017 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
1.64 | |
| CY2018 | us-gaap |
Common Stock Dividends Per Share Cash Paid
CommonStockDividendsPerShareCashPaid
|
1.68 | |
| CY2017Q3 | us-gaap |
Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
|
1 | |
| CY2018Q3 | us-gaap |
Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
|
1 | |
| CY2017Q3 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
200000000 | shares |
| CY2018Q3 | us-gaap |
Common Stock Shares Authorized
CommonStockSharesAuthorized
|
200000000 | shares |
| CY2017Q3 | us-gaap |
Common Stock Shares Issued
CommonStockSharesIssued
|
85543125 | shares |
| CY2018Q3 | us-gaap |
Common Stock Shares Issued
CommonStockSharesIssued
|
85956814 | shares |
| CY2017Q3 | us-gaap |
Common Stock Shares Outstanding
CommonStockSharesOutstanding
|
85543125 | shares |
| CY2018Q3 | us-gaap |
Common Stock Shares Outstanding
CommonStockSharesOutstanding
|
85956814 | shares |
| CY2017Q3 | us-gaap |
Common Stock Value
CommonStockValue
|
85543000 | USD |
| CY2018 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
-38927000 | USD |
| CY2018 | us-gaap |
Costs Incurred Development Costs
CostsIncurredDevelopmentCosts
|
332496000 | USD |
| CY2016 | us-gaap |
Costs Incurred Exploration Costs
CostsIncurredExplorationCosts
|
27561000 | USD |
| CY2017 | us-gaap |
Costs Incurred Exploration Costs
CostsIncurredExplorationCosts
|
40975000 | USD |
| CY2018 | us-gaap |
Costs Incurred Exploration Costs
CostsIncurredExplorationCosts
|
29365000 | USD |
| CY2018Q3 | us-gaap |
Credit Risk Derivative Assets At Fair Value
CreditRiskDerivativeAssetsAtFairValue
|
9000000 | USD |
| CY2018Q3 | us-gaap |
Credit Risk Derivative Liabilities At Fair Value
CreditRiskDerivativeLiabilitiesAtFairValue
|
40300000 | USD |
| CY2018Q3 | us-gaap |
Common Stock Value
CommonStockValue
|
85957000 | USD |
| CY2016 | us-gaap |
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
|
-389970000 | USD |
| CY2017 | us-gaap |
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
|
258999000 | USD |
| CY2018 | us-gaap |
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
|
353894000 | USD |
| CY2016 | us-gaap |
Costs Incurred Acquisition Of Oil And Gas Properties
CostsIncurredAcquisitionOfOilAndGasProperties
|
200801000 | USD |
| CY2017 | us-gaap |
Costs Incurred Acquisition Of Oil And Gas Properties
CostsIncurredAcquisitionOfOilAndGasProperties
|
241609000 | USD |
| CY2018 | us-gaap |
Costs Incurred Acquisition Of Oil And Gas Properties
CostsIncurredAcquisitionOfOilAndGasProperties
|
357584000 | USD |
| CY2016 | us-gaap |
Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves
CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves
|
1342000 | USD |
| CY2017 | us-gaap |
Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves
CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves
|
8908000 | USD |
| CY2018 | us-gaap |
Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves
CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves
|
1544000 | USD |
| CY2016 | us-gaap |
Costs Incurred Acquisition Of Unproved Oil And Gas Properties
CostsIncurredAcquisitionOfUnprovedOilAndGasProperties
|
2165000 | USD |
| CY2017 | us-gaap |
Costs Incurred Acquisition Of Unproved Oil And Gas Properties
CostsIncurredAcquisitionOfUnprovedOilAndGasProperties
|
262000 | USD |
| CY2018 | us-gaap |
Costs Incurred Acquisition Of Unproved Oil And Gas Properties
CostsIncurredAcquisitionOfUnprovedOilAndGasProperties
|
4286000 | USD |
| CY2016 | us-gaap |
Costs Incurred Asset Retirement Obligation Incurred
CostsIncurredAssetRetirementObligationIncurred
|
49653000 | USD |
| CY2017 | us-gaap |
Costs Incurred Asset Retirement Obligation Incurred
CostsIncurredAssetRetirementObligationIncurred
|
9175000 | USD |
| CY2018 | us-gaap |
Costs Incurred Asset Retirement Obligation Incurred
CostsIncurredAssetRetirementObligationIncurred
|
10107000 | USD |
| CY2016 | us-gaap |
Costs Incurred Development Costs
CostsIncurredDevelopmentCosts
|
219386000 | USD |
| CY2017 | us-gaap |
Costs Incurred Development Costs
CostsIncurredDevelopmentCosts
|
200639000 | USD |
| CY2016 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
-6658000 | USD |
| CY2017 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
32034000 | USD |
| CY2018 | us-gaap |
Current Federal Tax Expense Benefit
CurrentFederalTaxExpenseBenefit
|
2025000 | USD |
| CY2016 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
20903000 | USD |
| CY2017 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
10673000 | USD |
| CY2018 | us-gaap |
Current State And Local Tax Expense Benefit
CurrentStateAndLocalTaxExpenseBenefit
|
8634000 | USD |
| CY2017Q3 | us-gaap |
Customer Advances Current
CustomerAdvancesCurrent
|
15701000 | USD |
| CY2018Q3 | us-gaap |
Customer Advances Current
CustomerAdvancesCurrent
|
13609000 | USD |
| CY2017Q3 | us-gaap |
Customer Deposits Current
CustomerDepositsCurrent
|
20372000 | USD |
| CY2018Q3 | us-gaap |
Customer Deposits Current
CustomerDepositsCurrent
|
25703000 | USD |
| CY2017Q3 | us-gaap |
Debt Instrument Carrying Amount
DebtInstrumentCarryingAmount
|
2383681000 | USD |
| CY2018Q3 | us-gaap |
Debt Instrument Carrying Amount
DebtInstrumentCarryingAmount
|
2131365000 | USD |
| CY2017Q3 | us-gaap |
Debt Instrument Fair Value
DebtInstrumentFairValue
|
2523639000 | USD |
| CY2018Q3 | us-gaap |
Debt Instrument Fair Value
DebtInstrumentFairValue
|
2121861000 | USD |
| CY2018 | us-gaap |
Debt Instrument Interest Rate Increase Decrease
DebtInstrumentInterestRateIncreaseDecrease
|
0.0200 | |
| CY2017Q3 | us-gaap |
Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net
DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
|
15319000 | USD |
| CY2018Q3 | us-gaap |
Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net
DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
|
17635000 | USD |
| CY2018Q3 | us-gaap |
Debt Instrument Unused Borrowing Capacity Amount
DebtInstrumentUnusedBorrowingCapacityAmount
|
1460000000 | USD |
| CY2017Q3 | us-gaap |
Deferred Costs
DeferredCosts
|
30047000 | USD |
| CY2018Q3 | us-gaap |
Deferred Costs
DeferredCosts
|
40025000 | USD |
| CY2016 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
-164818000 | USD |
| CY2017 | us-gaap |
Deferred Federal Income Tax Expense Benefit
DeferredFederalIncomeTaxExpenseBenefit
|
103046000 | USD |
| CY2016 | us-gaap |
Deferred Income Taxes And Tax Credits
DeferredIncomeTaxesAndTaxCredits
|
-246794000 | USD |
| CY2017 | us-gaap |
Deferred Income Taxes And Tax Credits
DeferredIncomeTaxesAndTaxCredits
|
117975000 | USD |
| CY2018 | us-gaap |
Deferred Income Taxes And Tax Credits
DeferredIncomeTaxesAndTaxCredits
|
-18153000 | USD |
| CY2016 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
-81976000 | USD |
| CY2017 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
14929000 | USD |
| CY2018 | us-gaap |
Deferred State And Local Income Tax Expense Benefit
DeferredStateAndLocalIncomeTaxExpenseBenefit
|
20774000 | USD |
| CY2017Q3 | us-gaap |
Deferred Tax Assets Capital Loss Carryforwards
DeferredTaxAssetsCapitalLossCarryforwards
|
200344000 | USD |
| CY2018Q3 | us-gaap |
Deferred Tax Assets Capital Loss Carryforwards
DeferredTaxAssetsCapitalLossCarryforwards
|
214128000 | USD |
| CY2018Q3 | us-gaap |
Deferred Tax Assets Charitable Contribution Carryforwards
DeferredTaxAssetsCharitableContributionCarryforwards
|
3067000 | USD |
| CY2017Q3 | us-gaap |
Deferred Tax Assets Gross
DeferredTaxAssetsGross
|
406707000 | USD |
| CY2018Q3 | us-gaap |
Deferred Tax Assets Gross
DeferredTaxAssetsGross
|
352383000 | USD |
| CY2017Q3 | us-gaap |
Deferred Tax Assets Liabilities Net
DeferredTaxAssetsLiabilitiesNet
|
891287000 | USD |
| CY2018Q3 | us-gaap |
Deferred Tax Assets Liabilities Net
DeferredTaxAssetsLiabilitiesNet
|
512686000 | USD |
| CY2017Q3 | us-gaap |
Deferred Tax Assets Net
DeferredTaxAssetsNet
|
406707000 | USD |
| CY2018Q3 | us-gaap |
Deferred Tax Assets Net
DeferredTaxAssetsNet
|
347383000 | USD |
| CY2017Q3 | us-gaap |
Deferred Tax Assets Other
DeferredTaxAssetsOther
|
82831000 | USD |
| CY2018Q3 | us-gaap |
Deferred Tax Assets Other
DeferredTaxAssetsOther
|
75286000 | USD |
| CY2017Q3 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
0 | USD |
| CY2018Q3 | us-gaap |
Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
|
5000000 | USD |
| CY2017Q3 | us-gaap |
Deferred Tax Liabilities
DeferredTaxLiabilities
|
1297994000 | USD |
| CY2018Q3 | us-gaap |
Deferred Tax Liabilities
DeferredTaxLiabilities
|
860069000 | USD |
| CY2017Q3 | us-gaap |
Deferred Tax Liabilities Noncurrent
DeferredTaxLiabilitiesNoncurrent
|
891287000 | USD |
| CY2018Q3 | us-gaap |
Deferred Tax Liabilities Noncurrent
DeferredTaxLiabilitiesNoncurrent
|
512686000 | USD |
| CY2017Q3 | us-gaap |
Deferred Tax Liabilities Other
DeferredTaxLiabilitiesOther
|
77046000 | USD |
| CY2018Q3 | us-gaap |
Deferred Tax Liabilities Other
DeferredTaxLiabilitiesOther
|
49734000 | USD |
| CY2017Q3 | us-gaap |
Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
|
1141432000 | USD |
| CY2018Q3 | us-gaap |
Deferred Tax Liabilities Property Plant And Equipment
DeferredTaxLiabilitiesPropertyPlantAndEquipment
|
770794000 | USD |
| CY2017Q3 | us-gaap |
Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit After Tax
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax
|
1200000 | USD |
| CY2018Q3 | us-gaap |
Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit After Tax
DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax
|
1000000 | USD |
| CY2017Q3 | us-gaap |
Defined Benefit Plan Assets For Plan Benefits Noncurrent
DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
|
56370000 | USD |
| CY2018Q3 | us-gaap |
Defined Benefit Plan Assets For Plan Benefits Noncurrent
DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
|
82733000 | USD |
| CY2018 | us-gaap |
Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation1
DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1
|
42800000 | USD |
| CY2018 | us-gaap |
Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1
DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1
|
2100000 | USD |
| CY2018 | us-gaap |
Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation
DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation
|
51300000 | USD |
| CY2018 | us-gaap |
Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components
DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents
|
2900000 | USD |
| CY2018Q3 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter
DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
|
330900000 | USD |
| CY2018Q3 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months
DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
|
65700000 | USD |
| CY2018Q3 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Year Five
DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
|
66600000 | USD |
| CY2018Q3 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Year Four
DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
|
66500000 | USD |
| CY2018Q3 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Year Three
DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
|
66300000 | USD |
| CY2018Q3 | us-gaap |
Defined Benefit Plan Expected Future Benefit Payments Year Two
DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
|
65900000 | USD |
| CY2016Q3 | us-gaap |
Defined Benefit Plan Ultimate Health Care Cost Trend Rate1
DefinedBenefitPlanUltimateHealthCareCostTrendRate1
|
0.045 | |
| CY2017Q3 | us-gaap |
Defined Benefit Plan Ultimate Health Care Cost Trend Rate1
DefinedBenefitPlanUltimateHealthCareCostTrendRate1
|
0.045 | |
| CY2018Q3 | us-gaap |
Defined Benefit Plan Ultimate Health Care Cost Trend Rate1
DefinedBenefitPlanUltimateHealthCareCostTrendRate1
|
0.045 | |
| CY2017Q1 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
1.05 | |
| CY2017 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.35 | |
| CY2016 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
249417000 | USD |
| CY2017 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
224195000 | USD |
| CY2018 | us-gaap |
Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
|
240961000 | USD |
| CY2017Q3 | us-gaap |
Derivative Instruments And Hedges Liabilities
DerivativeInstrumentsAndHedgesLiabilities
|
1103000 | USD |
| CY2018Q3 | us-gaap |
Derivative Instruments And Hedges Liabilities
DerivativeInstrumentsAndHedgesLiabilities
|
49036000 | USD |
| CY2017Q3 | us-gaap |
Derivative Instruments And Hedges Noncurrent
DerivativeInstrumentsAndHedgesNoncurrent
|
36111000 | USD |
| CY2018Q3 | us-gaap |
Derivative Instruments And Hedges Noncurrent
DerivativeInstrumentsAndHedgesNoncurrent
|
9518000 | USD |
| CY2017 | us-gaap |
Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net
DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
|
81605000 | USD |
| CY2018 | us-gaap |
Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net
DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
|
-1189000 | USD |
| CY2017 | us-gaap |
Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net
DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet
|
-100000 | USD |
| CY2018 | us-gaap |
Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net
DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet
|
-782000 | USD |
| CY2016 | us-gaap |
Development Costs
DevelopmentCosts
|
2886000 | USD |
| CY2017 | us-gaap |
Development Costs
DevelopmentCosts
|
236000 | USD |
| CY2018 | us-gaap |
Development Costs
DevelopmentCosts
|
11115000 | USD |
| CY2016 | us-gaap |
Dividends Common Stock Cash
DividendsCommonStockCash
|
135881000 | USD |
| CY2017 | us-gaap |
Dividends Common Stock Cash
DividendsCommonStockCash
|
140090000 | USD |
| CY2018 | us-gaap |
Dividends Common Stock Cash
DividendsCommonStockCash
|
144290000 | USD |
| CY2017Q3 | us-gaap |
Dividends Payable Current
DividendsPayableCurrent
|
35500000 | USD |
| CY2018Q3 | us-gaap |
Dividends Payable Current
DividendsPayableCurrent
|
36532000 | USD |
| CY2016 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
-3.43 | |
| CY2016Q4 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
1.04 | |
| CY2017Q2 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.70 | |
| CY2017Q3 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.53 | |
| CY2017 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
3.32 | |
| CY2017Q4 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
2.32 | |
| CY2018Q1 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
1.07 | |
| CY2018Q2 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.73 | |
| CY2018Q3 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
0.44 | |
| CY2018 | us-gaap |
Earnings Per Share Basic
EarningsPerShareBasic
|
4.56 | |
| CY2016 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
-3.43 | |
| CY2016Q4 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
1.04 | |
| CY2017Q1 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
1.04 | |
| CY2017Q2 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.69 | |
| CY2017Q3 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.53 | |
| CY2017 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
3.30 | |
| CY2017Q4 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
2.30 | |
| CY2018Q1 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
1.06 | |
| CY2018Q2 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.73 | |
| CY2018Q3 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
0.44 | |
| CY2018 | us-gaap |
Earnings Per Share Diluted
EarningsPerShareDiluted
|
4.53 | |
| CY2016 | us-gaap |
Effect On Future Cash Flows Amount
EffectOnFutureCashFlowsAmount
|
215300000 | USD |
| CY2017 | us-gaap |
Effect On Future Cash Flows Amount
EffectOnFutureCashFlowsAmount
|
30500000 | USD |
| CY2018 | us-gaap |
Effect On Future Cash Flows Amount
EffectOnFutureCashFlowsAmount
|
-25100000 | USD |
| CY2018 | us-gaap |
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
|
0.245 | |
| CY2016 | us-gaap |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
|
100000 | USD |
| CY2017 | us-gaap |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
|
100000 | USD |
| CY2018 | us-gaap |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
|
100000 | USD |
| CY2016 | us-gaap |
Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
|
1900000 | USD |
| CY2017 | us-gaap |
Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
|
4400000 | USD |
| CY2018 | us-gaap |
Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
|
3400000 | USD |
| CY2018 | us-gaap |
Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options
EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions
|
1000000 | USD |
| CY2017Q3 | us-gaap |
Energy Related Inventory Gas Stored Underground
EnergyRelatedInventoryGasStoredUnderground
|
35689000 | USD |
| CY2018Q3 | us-gaap |
Energy Related Inventory Gas Stored Underground
EnergyRelatedInventoryGasStoredUnderground
|
37813000 | USD |
| CY2016 | us-gaap |
Excess Tax Benefit From Share Based Compensation Financing Activities
ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
|
1868000 | USD |
| CY2017 | us-gaap |
Excess Tax Benefit From Share Based Compensation Financing Activities
ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
|
0 | USD |
| CY2018 | us-gaap |
Excess Tax Benefit From Share Based Compensation Financing Activities
ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
|
0 | USD |
| CY2016 | us-gaap |
Excess Tax Benefit From Share Based Compensation Operating Activities
ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
|
1868000 | USD |
| CY2017 | us-gaap |
Excess Tax Benefit From Share Based Compensation Operating Activities
ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
|
0 | USD |
| CY2018 | us-gaap |
Excess Tax Benefit From Share Based Compensation Operating Activities
ExcessTaxBenefitFromShareBasedCompensationOperatingActivities
|
0 | USD |
| CY2016 | us-gaap |
Exploration Costs
ExplorationCosts
|
7574000 | USD |
| CY2017 | us-gaap |
Exploration Costs
ExplorationCosts
|
32000 | USD |
| CY2018 | us-gaap |
Exploration Costs
ExplorationCosts
|
0 | USD |
| CY2017Q3 | us-gaap |
Fair Value Assets Level1 To Level2 Transfers Amount
FairValueAssetsLevel1ToLevel2TransfersAmount
|
0 | USD |
| CY2018Q3 | us-gaap |
Fair Value Assets Level1 To Level2 Transfers Amount
FairValueAssetsLevel1ToLevel2TransfersAmount
|
0 | USD |
| CY2017 | us-gaap |
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet
|
0 | USD |
| CY2018 | us-gaap |
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet
|
0 | USD |
| CY2018 | us-gaap |
Gain Loss On Fair Value Hedges Recognized In Earnings
GainLossOnFairValueHedgesRecognizedInEarnings
|
-1527000 | USD |
| CY2018 | us-gaap |
Gains Losses On Extinguishment Of Debt
GainsLossesOnExtinguishmentOfDebt
|
1000000 | USD |
| CY2017Q3 | us-gaap |
Goodwill
Goodwill
|
5476000 | USD |
| CY2018Q3 | us-gaap |
Goodwill
Goodwill
|
5476000 | USD |
| CY2018Q3 | us-gaap |
Goodwill
Goodwill
|
5500000 | USD |
| CY2016 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
-523507000 | USD |
| CY2017 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
444164000 | USD |
| CY2018 | us-gaap |
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
|
384027000 | USD |
| CY2016 | us-gaap |
Income Tax Effects Allocated Directly To Equity Cumulative Effect Of Change In Accounting Principle
IncomeTaxEffectsAllocatedDirectlyToEquityCumulativeEffectOfChangeInAccountingPrinciple
|
0 | USD |
| CY2017 | us-gaap |
Income Tax Effects Allocated Directly To Equity Cumulative Effect Of Change In Accounting Principle
IncomeTaxEffectsAllocatedDirectlyToEquityCumulativeEffectOfChangeInAccountingPrinciple
|
31916000 | USD |
| CY2018 | us-gaap |
Income Tax Effects Allocated Directly To Equity Cumulative Effect Of Change In Accounting Principle
IncomeTaxEffectsAllocatedDirectlyToEquityCumulativeEffectOfChangeInAccountingPrinciple
|
0 | USD |
| CY2016 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
-232549000 | USD |
| CY2017 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
160682000 | USD |
| CY2018 | us-gaap |
Income Tax Expense Benefit
IncomeTaxExpenseBenefit
|
-7494000 | USD |
| CY2017Q4 | us-gaap |
Income Tax Expense Benefit Continuing Operations Adjustment Of Deferred Tax Asset Liability
IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability
|
-111000000 | USD |
| CY2018Q1 | us-gaap |
Income Tax Expense Benefit Continuing Operations Adjustment Of Deferred Tax Asset Liability
IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability
|
4000000 | USD |
| CY2018Q3 | us-gaap |
Income Tax Expense Benefit Continuing Operations Adjustment Of Deferred Tax Asset Liability
IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability
|
3500000 | USD |
| CY2018 | us-gaap |
Income Tax Expense Benefit Continuing Operations Adjustment Of Deferred Tax Asset Liability
IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability
|
-103500000 | USD |
| CY2016 | us-gaap |
Income Tax Reconciliation Change In Enacted Tax Rate
IncomeTaxReconciliationChangeInEnactedTaxRate
|
0 | USD |
| CY2017 | us-gaap |
Income Tax Reconciliation Change In Enacted Tax Rate
IncomeTaxReconciliationChangeInEnactedTaxRate
|
0 | USD |
| CY2018 | us-gaap |
Income Tax Reconciliation Change In Enacted Tax Rate
IncomeTaxReconciliationChangeInEnactedTaxRate
|
-112598000 | USD |
| CY2016 | us-gaap |
Income Tax Reconciliation Deductions Other
IncomeTaxReconciliationDeductionsOther
|
6589000 | USD |
| CY2017 | us-gaap |
Income Tax Reconciliation Deductions Other
IncomeTaxReconciliationDeductionsOther
|
4850000 | USD |
| CY2018 | us-gaap |
Income Tax Reconciliation Deductions Other
IncomeTaxReconciliationDeductionsOther
|
4689000 | USD |
| CY2016 | us-gaap |
Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
|
-183349000 | USD |
| CY2017 | us-gaap |
Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
|
155397000 | USD |
| CY2018 | us-gaap |
Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate
IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
|
94061000 | USD |
| CY2016 | us-gaap |
Income Tax Reconciliation State And Local Income Taxes
IncomeTaxReconciliationStateAndLocalIncomeTaxes
|
-39697000 | USD |
| CY2017 | us-gaap |
Income Tax Reconciliation State And Local Income Taxes
IncomeTaxReconciliationStateAndLocalIncomeTaxes
|
16641000 | USD |
| CY2018 | us-gaap |
Income Tax Reconciliation State And Local Income Taxes
IncomeTaxReconciliationStateAndLocalIncomeTaxes
|
22203000 | USD |
| CY2016 | us-gaap |
Income Tax Reconciliation Tax Credits
IncomeTaxReconciliationTaxCredits
|
3262000 | USD |
| CY2017 | us-gaap |
Income Tax Reconciliation Tax Credits
IncomeTaxReconciliationTaxCredits
|
6679000 | USD |
| CY2018 | us-gaap |
Income Tax Reconciliation Tax Credits
IncomeTaxReconciliationTaxCredits
|
6576000 | USD |
| CY2016 | us-gaap |
Income Taxes Paid Net
IncomeTaxesPaidNet
|
34240000 | USD |
| CY2017 | us-gaap |
Income Taxes Paid Net
IncomeTaxesPaidNet
|
34826000 | USD |
| CY2018 | us-gaap |
Income Taxes Paid Net
IncomeTaxesPaidNet
|
31771000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Accounts Payable Trade
IncreaseDecreaseInAccountsPayableTrade
|
-40664000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Accounts Payable Trade
IncreaseDecreaseInAccountsPayableTrade
|
17192000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Accounts Payable Trade
IncreaseDecreaseInAccountsPayableTrade
|
17962000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Accrued Liabilities
IncreaseDecreaseInAccruedLiabilities
|
3453000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Accrued Liabilities
IncreaseDecreaseInAccruedLiabilities
|
27004000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Accrued Liabilities
IncreaseDecreaseInAccruedLiabilities
|
3865000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Customer Advances
IncreaseDecreaseInCustomerAdvances
|
-1474000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Customer Advances
IncreaseDecreaseInCustomerAdvances
|
939000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Customer Advances
IncreaseDecreaseInCustomerAdvances
|
-2092000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Customer Deposits
IncreaseDecreaseInCustomerDeposits
|
-471000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Customer Deposits
IncreaseDecreaseInCustomerDeposits
|
4353000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Customer Deposits
IncreaseDecreaseInCustomerDeposits
|
5331000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Deferred Gas Cost
IncreaseDecreaseInDeferredGasCost
|
2440000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Deferred Gas Cost
IncreaseDecreaseInDeferredGasCost
|
2183000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Deferred Gas Cost
IncreaseDecreaseInDeferredGasCost
|
-419000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Inventories
IncreaseDecreaseInInventories
|
3532000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Inventories
IncreaseDecreaseInInventories
|
1417000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Inventories
IncreaseDecreaseInInventories
|
4021000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Margin Deposits Outstanding
IncreaseDecreaseInMarginDepositsOutstanding
|
-9640000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Margin Deposits Outstanding
IncreaseDecreaseInMarginDepositsOutstanding
|
257000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Margin Deposits Outstanding
IncreaseDecreaseInMarginDepositsOutstanding
|
1700000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Other Current Assets
IncreaseDecreaseInOtherCurrentAssets
|
-3179000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Other Current Assets
IncreaseDecreaseInOtherCurrentAssets
|
-7849000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Other Current Assets
IncreaseDecreaseInOtherCurrentAssets
|
16519000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
-1941000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
2885000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Other Operating Assets
IncreaseDecreaseInOtherOperatingAssets
|
9556000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Other Operating Liabilities
IncreaseDecreaseInOtherOperatingLiabilities
|
-13483000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Other Operating Liabilities
IncreaseDecreaseInOtherOperatingLiabilities
|
2183000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Other Operating Liabilities
IncreaseDecreaseInOtherOperatingLiabilities
|
1178000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
6408000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
3380000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Receivables
IncreaseDecreaseInReceivables
|
30882000 | USD |
| CY2016 | us-gaap |
Increase Decrease In Regulatory Clause Revenue
IncreaseDecreaseInRegulatoryClauseRevenue
|
-37241000 | USD |
| CY2017 | us-gaap |
Increase Decrease In Regulatory Clause Revenue
IncreaseDecreaseInRegulatoryClauseRevenue
|
-19537000 | USD |
| CY2018 | us-gaap |
Increase Decrease In Regulatory Clause Revenue
IncreaseDecreaseInRegulatoryClauseRevenue
|
3394000 | USD |
| CY2016 | us-gaap |
Interest Costs Capitalized
InterestCostsCapitalized
|
103000 | USD |
| CY2017 | us-gaap |
Interest Costs Capitalized
InterestCostsCapitalized
|
0 | USD |
| CY2018 | us-gaap |
Interest Costs Capitalized
InterestCostsCapitalized
|
20000 | USD |
| CY2016 | us-gaap |
Interest Expense
InterestExpense
|
121044000 | USD |
| CY2017 | us-gaap |
Interest Expense
InterestExpense
|
119837000 | USD |
| CY2018 | us-gaap |
Interest Expense
InterestExpense
|
114522000 | USD |
| CY2016 | us-gaap |
Interest Expense Long Term Debt
InterestExpenseLongTermDebt
|
117347000 | USD |
| CY2017 | us-gaap |
Interest Expense Long Term Debt
InterestExpenseLongTermDebt
|
116471000 | USD |
| CY2018 | us-gaap |
Interest Expense Long Term Debt
InterestExpenseLongTermDebt
|
110946000 | USD |
| CY2016 | us-gaap |
Interest Expense Other
InterestExpenseOther
|
3697000 | USD |
| CY2017 | us-gaap |
Interest Expense Other
InterestExpenseOther
|
3366000 | USD |
| CY2018 | us-gaap |
Interest Expense Other
InterestExpenseOther
|
3576000 | USD |
| CY2016 | us-gaap |
Interest Income Domestic Deposits
InterestIncomeDomesticDeposits
|
4235000 | USD |
| CY2017 | us-gaap |
Interest Income Domestic Deposits
InterestIncomeDomesticDeposits
|
4113000 | USD |
| CY2018 | us-gaap |
Interest Income Domestic Deposits
InterestIncomeDomesticDeposits
|
6766000 | USD |
| CY2016 | us-gaap |
Interest Paid
InterestPaid
|
119563000 | USD |
| CY2017 | us-gaap |
Interest Paid
InterestPaid
|
116894000 | USD |
| CY2018 | us-gaap |
Interest Paid
InterestPaid
|
126079000 | USD |
| CY2017Q3 | us-gaap |
Inventory Raw Materials And Supplies
InventoryRawMaterialsAndSupplies
|
33926000 | USD |
| CY2018Q3 | us-gaap |
Inventory Raw Materials And Supplies
InventoryRawMaterialsAndSupplies
|
35823000 | USD |
| CY2016 | us-gaap |
Investment Tax Credit
InvestmentTaxCredit
|
348000 | USD |
| CY2017 | us-gaap |
Investment Tax Credit
InvestmentTaxCredit
|
173000 | USD |
| CY2018 | us-gaap |
Investment Tax Credit
InvestmentTaxCredit
|
105000 | USD |
| CY2017Q3 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
6103320000 | USD |
| CY2018Q3 | us-gaap |
Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
|
6036486000 | USD |
| CY2017Q3 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
646039000 | USD |
| CY2018Q3 | us-gaap |
Liabilities Current
LiabilitiesCurrent
|
440060000 | USD |
| CY2017Q3 | us-gaap |
Liabilities Noncurrent
LiabilitiesNoncurrent
|
1669865000 | USD |
| CY2018Q3 | us-gaap |
Liabilities Noncurrent
LiabilitiesNoncurrent
|
1527731000 | USD |
| CY2017Q3 | us-gaap |
Long Term Debt Current
LongTermDebtCurrent
|
300000000 | USD |
| CY2018Q3 | us-gaap |
Long Term Debt Current
LongTermDebtCurrent
|
0 | USD |
| CY2018Q3 | us-gaap |
Long Term Debt Maturities Repayments Of Principal After Year Five
LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
|
1100000000 | USD |
| CY2018Q3 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Next Twelve Months
LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
|
0 | USD |
| CY2018Q3 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Five
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
|
549000000 | USD |
| CY2018Q3 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Four
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
|
500000000 | USD |
| CY2018Q3 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Three
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
|
0 | USD |
| CY2018Q3 | us-gaap |
Long Term Debt Maturities Repayments Of Principal In Year Two
LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
|
0 | USD |
| CY2017Q3 | us-gaap |
Long Term Debt Noncurrent
LongTermDebtNoncurrent
|
2083681000 | USD |
| CY2018Q3 | us-gaap |
Long Term Debt Noncurrent
LongTermDebtNoncurrent
|
2131365000 | USD |
| CY2018Q3 | us-gaap |
Loss Contingency Estimate Of Possible Loss
LossContingencyEstimateOfPossibleLoss
|
7600000 | USD |
| CY2017Q3 | us-gaap |
Margin Deposit Assets
MarginDepositAssets
|
1741000 | USD |
| CY2018Q3 | us-gaap |
Margin Deposit Assets
MarginDepositAssets
|
3441000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Financing Activities Continuing Operations
NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
|
-119107000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Financing Activities Continuing Operations
NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
|
163872000 | USD |
| CY2018 | us-gaap |
Net Cash Provided By Used In Financing Activities Continuing Operations
NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
|
-410640000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Investing Activities Continuing Operations
NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
|
-453496000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Investing Activities Continuing Operations
NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
|
-422565000 | USD |
| CY2018 | us-gaap |
Net Cash Provided By Used In Investing Activities Continuing Operations
NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
|
-528887000 | USD |
| CY2016 | us-gaap |
Net Cash Provided By Used In Operating Activities Continuing Operations
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
|
588979000 | USD |
| CY2017 | us-gaap |
Net Cash Provided By Used In Operating Activities Continuing Operations
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
|
684251000 | USD |
| CY2018 | us-gaap |
Net Cash Provided By Used In Operating Activities Continuing Operations
NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
|
613603000 | USD |
| CY2016 | us-gaap |
Net Income Loss
NetIncomeLoss
|
-290958000 | USD |
| CY2016Q4 | us-gaap |
Net Income Loss
NetIncomeLoss
|
88908000 | USD |
| CY2017Q1 | us-gaap |
Net Income Loss
NetIncomeLoss
|
89283000 | USD |
| CY2017Q2 | us-gaap |
Net Income Loss
NetIncomeLoss
|
59714000 | USD |
| CY2017Q3 | us-gaap |
Net Income Loss
NetIncomeLoss
|
45577000 | USD |
| CY2017 | us-gaap |
Net Income Loss
NetIncomeLoss
|
283482000 | USD |
| CY2017Q4 | us-gaap |
Net Income Loss
NetIncomeLoss
|
198654000 | USD |
| CY2018Q1 | us-gaap |
Net Income Loss
NetIncomeLoss
|
91847000 | USD |
| CY2018Q2 | us-gaap |
Net Income Loss
NetIncomeLoss
|
63025000 | USD |
| CY2018Q3 | us-gaap |
Net Income Loss
NetIncomeLoss
|
37995000 | USD |
| CY2018 | us-gaap |
Net Income Loss
NetIncomeLoss
|
391521000 | USD |
| CY2018 | us-gaap |
Number Of Reportable Segments
NumberOfReportableSegments
|
5 | |
| CY2016 | us-gaap |
Operating Expenses
OperatingExpenses
|
1868934000 | USD |
| CY2017 | us-gaap |
Operating Expenses
OperatingExpenses
|
1027036000 | USD |
| CY2018 | us-gaap |
Operating Expenses
OperatingExpenses
|
1105582000 | USD |
| CY2016 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
-416518000 | USD |
| CY2016Q4 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
172139000 | USD |
| CY2017Q1 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
169957000 | USD |
| CY2017Q2 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
123354000 | USD |
| CY2017Q3 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
87395000 | USD |
| CY2017 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
552845000 | USD |
| CY2017Q4 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
141995000 | USD |
| CY2018Q1 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
156702000 | USD |
| CY2018Q2 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
107760000 | USD |
| CY2018Q3 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
80629000 | USD |
| CY2018 | us-gaap |
Operating Income Loss
OperatingIncomeLoss
|
487086000 | USD |
| CY2018Q3 | us-gaap |
Operating Leases Future Minimum Payments Due Current
OperatingLeasesFutureMinimumPaymentsDueCurrent
|
18600000 | USD |
| CY2018Q3 | us-gaap |
Operating Leases Future Minimum Payments Due In Five Years
OperatingLeasesFutureMinimumPaymentsDueInFiveYears
|
2700000 | USD |
| CY2018Q3 | us-gaap |
Operating Leases Future Minimum Payments Due In Four Years
OperatingLeasesFutureMinimumPaymentsDueInFourYears
|
3200000 | USD |
| CY2018Q3 | us-gaap |
Operating Leases Future Minimum Payments Due In Three Years
OperatingLeasesFutureMinimumPaymentsDueInThreeYears
|
4000000 | USD |
| CY2018Q3 | us-gaap |
Operating Leases Future Minimum Payments Due In Two Years
OperatingLeasesFutureMinimumPaymentsDueInTwoYears
|
4600000 | USD |
| CY2018Q3 | us-gaap |
Operating Leases Future Minimum Payments Due Thereafter
OperatingLeasesFutureMinimumPaymentsDueThereafter
|
12400000 | USD |
| CY2017Q3 | us-gaap |
Other Assets Current
OtherAssetsCurrent
|
51505000 | USD |
| CY2018Q3 | us-gaap |
Other Assets Current
OtherAssetsCurrent
|
68024000 | USD |
| CY2017Q3 | us-gaap |
Other Assets Noncurrent
OtherAssetsNoncurrent
|
742000 | USD |
| CY2018Q3 | us-gaap |
Other Assets Noncurrent
OtherAssetsNoncurrent
|
102000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Before Reclassifications Net Of Tax
OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
|
15327000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Before Reclassifications Net Of Tax
OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
|
-46766000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Before Tax
OtherComprehensiveIncomeLossBeforeTax
|
-171586000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Before Tax
OtherComprehensiveIncomeLossBeforeTax
|
-44731000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Before Tax
OtherComprehensiveIncomeLossBeforeTax
|
-57283000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
|
-99012000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
|
-24483000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
|
-37627000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax
|
21378000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax
|
-15661000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax
|
-6225000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax
|
8351000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax
|
-6175000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax
|
-1582000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
|
1374000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
|
1575000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
|
430000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
|
527000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
|
580000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
|
158000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax
|
220919000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax
|
81605000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax
|
-1189000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax
|
86659000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax
|
34286000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax
|
955000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax
|
10068000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax
|
13433000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Before Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax
|
9704000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax
|
3723000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax
|
4929000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans Tax
OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax
|
2437000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Loss Tax
OtherComprehensiveIncomeLossTax
|
-72574000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Loss Tax
OtherComprehensiveIncomeLossTax
|
-20248000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Loss Tax
OtherComprehensiveIncomeLossTax
|
-19656000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
|
60493000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
|
5347000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
|
-74103000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax
|
18648000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax
|
2009000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax
|
-22547000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
|
1524000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
|
4008000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
|
132000 | USD |
| CY2016 | us-gaap |
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
|
592000 | USD |
| CY2017 | us-gaap |
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
|
1505000 | USD |
| CY2018 | us-gaap |
Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
|
-15000 | USD |
| CY2017Q3 | us-gaap |
Other Deferred Credits Noncurrent
OtherDeferredCreditsNoncurrent
|
109019000 | USD |
| CY2018Q3 | us-gaap |
Other Deferred Credits Noncurrent
OtherDeferredCreditsNoncurrent
|
111025000 | USD |
| CY2016 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-12620000 | USD |
| CY2017 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-16476000 | USD |
| CY2018 | us-gaap |
Other Noncash Income Expense
OtherNoncashIncomeExpense
|
-16133000 | USD |
| CY2016 | us-gaap |
Other Nonoperating Income
OtherNonoperatingIncome
|
9820000 | USD |
| CY2017 | us-gaap |
Other Nonoperating Income
OtherNonoperatingIncome
|
7043000 | USD |
| CY2018 | us-gaap |
Other Nonoperating Income
OtherNonoperatingIncome
|
4697000 | USD |
| CY2017Q3 | us-gaap |
Other Prepaid Expense Current
OtherPrepaidExpenseCurrent
|
10927000 | USD |
| CY2018Q3 | us-gaap |
Other Prepaid Expense Current
OtherPrepaidExpenseCurrent
|
11126000 | USD |
| CY2016 | us-gaap |
Other Significant Noncash Transaction Value Of Consideration Received1
OtherSignificantNoncashTransactionValueOfConsiderationReceived1
|
19543000 | USD |
| CY2017 | us-gaap |
Other Significant Noncash Transaction Value Of Consideration Received1
OtherSignificantNoncashTransactionValueOfConsiderationReceived1
|
0 | USD |
| CY2018 | us-gaap |
Other Significant Noncash Transaction Value Of Consideration Received1
OtherSignificantNoncashTransactionValueOfConsiderationReceived1
|
0 | USD |
| CY2016 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
9236000 | USD |
| CY2017 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
-1216000 | USD |
| CY2018 | us-gaap |
Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
|
389000 | USD |
| CY2016 | us-gaap |
Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
|
134824000 | USD |
| CY2017 | us-gaap |
Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
|
139063000 | USD |
| CY2018 | us-gaap |
Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
|
143258000 | USD |
| CY2016 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
581576000 | USD |
| CY2017 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
450335000 | USD |
| CY2018 | us-gaap |
Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
|
584004000 | USD |
| CY2017Q3 | us-gaap |
Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent
|
149079000 | USD |
| CY2018Q3 | us-gaap |
Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent
|
66103000 | USD |
| CY2018Q3 | us-gaap |
Preferred Stock Par Or Stated Value Per Share
PreferredStockParOrStatedValuePerShare
|
1 | |
| CY2018Q3 | us-gaap |
Preferred Stock Shares Authorized
PreferredStockSharesAuthorized
|
10000000 | shares |
| CY2017Q3 | us-gaap |
Prepaid Taxes
PrepaidTaxes
|
13974000 | USD |
| CY2018Q3 | us-gaap |
Prepaid Taxes
PrepaidTaxes
|
14088000 | USD |
| CY2016 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
0 | USD |
| CY2017 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
295151000 | USD |
| CY2018 | us-gaap |
Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
|
295020000 | USD |
| CY2016 | us-gaap |
Proceeds From Issuance Or Sale Of Equity
ProceedsFromIssuanceOrSaleOfEquity
|
13849000 | USD |
| CY2017 | us-gaap |
Proceeds From Issuance Or Sale Of Equity
ProceedsFromIssuanceOrSaleOfEquity
|
7784000 | USD |
| CY2018 | us-gaap |
Proceeds From Issuance Or Sale Of Equity
ProceedsFromIssuanceOrSaleOfEquity
|
4110000 | USD |
| CY2016 | us-gaap |
Proceeds From Sale Of Oil And Gas Property And Equipment
ProceedsFromSaleOfOilAndGasPropertyAndEquipment
|
137316000 | USD |
| CY2017 | us-gaap |
Proceeds From Sale Of Oil And Gas Property And Equipment
ProceedsFromSaleOfOilAndGasPropertyAndEquipment
|
26554000 | USD |
| CY2018 | us-gaap |
Proceeds From Sale Of Oil And Gas Property And Equipment
ProceedsFromSaleOfOilAndGasPropertyAndEquipment
|
55506000 | USD |
| CY2016 | us-gaap |
Property Plant And Equipment Additions
PropertyPlantAndEquipmentAdditions
|
523051000 | USD |
| CY2017 | us-gaap |
Property Plant And Equipment Additions
PropertyPlantAndEquipmentAdditions
|
462117000 | USD |
| CY2018 | us-gaap |
Property Plant And Equipment Additions
PropertyPlantAndEquipmentAdditions
|
600602000 | USD |
| CY2017Q3 | us-gaap |
Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
|
9945560000 | USD |
| CY2018Q3 | us-gaap |
Property Plant And Equipment Gross
PropertyPlantAndEquipmentGross
|
10439839000 | USD |
| CY2017Q3 | us-gaap |
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
|
4674074000 | USD |
| CY2018Q3 | us-gaap |
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
|
4977143000 | USD |
| CY2018 | us-gaap |
Public Utilities Approved Return On Equity Percentage
PublicUtilitiesApprovedReturnOnEquityPercentage
|
0.087 | |
| CY2017Q3 | us-gaap |
Receivables Net Current
ReceivablesNetCurrent
|
112383000 | USD |
| CY2018Q3 | us-gaap |
Receivables Net Current
ReceivablesNetCurrent
|
141498000 | USD |
| CY2017 | us-gaap |
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax
ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
|
39810000 | USD |
| CY2018 | us-gaap |
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax
ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
|
-9139000 | USD |
| CY2018Q3 | us-gaap |
Recorded Unconditional Purchase Obligation Due After Fifth Year
RecordedUnconditionalPurchaseObligationDueAfterFifthYear
|
1606000000 | USD |
| CY2018Q3 | us-gaap |
Recorded Unconditional Purchase Obligation Due In Fifth Year
RecordedUnconditionalPurchaseObligationDueInFifthYear
|
162800000 | USD |
| CY2018Q3 | us-gaap |
Recorded Unconditional Purchase Obligation Due In Fourth Year
RecordedUnconditionalPurchaseObligationDueInFourthYear
|
152500000 | USD |
| CY2018Q3 | us-gaap |
Recorded Unconditional Purchase Obligation Due In Second Year
RecordedUnconditionalPurchaseObligationDueInSecondYear
|
102900000 | USD |
| CY2018Q3 | us-gaap |
Recorded Unconditional Purchase Obligation Due In Third Year
RecordedUnconditionalPurchaseObligationDueInThirdYear
|
86600000 | USD |
| CY2018Q3 | us-gaap |
Recorded Unconditional Purchase Obligation Due Within One Year
RecordedUnconditionalPurchaseObligationDueWithinOneYear
|
297900000 | USD |
| CY2017Q3 | us-gaap |
Refundable Gas Costs
RefundableGasCosts
|
0 | USD |
| CY2018Q3 | us-gaap |
Refundable Gas Costs
RefundableGasCosts
|
3394000 | USD |
| CY2017Q3 | us-gaap |
Regulatory Assets
RegulatoryAssets
|
372839000 | USD |
| CY2018Q3 | us-gaap |
Regulatory Assets
RegulatoryAssets
|
254145000 | USD |
| CY2017Q3 | us-gaap |
Regulatory Assets Current
RegulatoryAssetsCurrent
|
15884000 | USD |
| CY2018Q3 | us-gaap |
Regulatory Assets Current
RegulatoryAssetsCurrent
|
9792000 | USD |
| CY2017Q3 | us-gaap |
Regulatory Assets Noncurrent
RegulatoryAssetsNoncurrent
|
174433000 | USD |
| CY2018Q3 | us-gaap |
Regulatory Assets Noncurrent
RegulatoryAssetsNoncurrent
|
112918000 | USD |
| CY2017Q3 | us-gaap |
Regulatory Liabilities
RegulatoryLiabilities
|
448144000 | USD |
| CY2018Q3 | us-gaap |
Regulatory Liabilities
RegulatoryLiabilities
|
790501000 | USD |
| CY2017Q3 | us-gaap |
Regulatory Liability Current
RegulatoryLiabilityCurrent
|
34059000 | USD |
| CY2018Q3 | us-gaap |
Regulatory Liability Current
RegulatoryLiabilityCurrent
|
60819000 | USD |
| CY2017Q3 | us-gaap |
Regulatory Liability Noncurrent
RegulatoryLiabilityNoncurrent
|
113716000 | USD |
| CY2018Q3 | us-gaap |
Regulatory Liability Noncurrent
RegulatoryLiabilityNoncurrent
|
146743000 | USD |
| CY2016 | us-gaap |
Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
|
0 | USD |
| CY2017 | us-gaap |
Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
|
0 | USD |
| CY2018 | us-gaap |
Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
|
566512000 | USD |
| CY2016 | us-gaap |
Results Of Operations Accretion Of Asset Retirement Obligations
ResultsOfOperationsAccretionOfAssetRetirementObligations
|
6663000 | USD |
| CY2017 | us-gaap |
Results Of Operations Accretion Of Asset Retirement Obligations
ResultsOfOperationsAccretionOfAssetRetirementObligations
|
4896000 | USD |
| CY2018 | us-gaap |
Results Of Operations Accretion Of Asset Retirement Obligations
ResultsOfOperationsAccretionOfAssetRetirementObligations
|
4266000 | USD |
| CY2016 | us-gaap |
Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions
ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions
|
136579000 | USD |
| CY2017 | us-gaap |
Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions
ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions
|
108471000 | USD |
| CY2018 | us-gaap |
Results Of Operations Depreciation Depletion And Amortization And Valuation Provisions
ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions
|
119946000 | USD |
| CY2016 | us-gaap |
Results Of Operations Impairment Of Oil And Gas Properties
ResultsOfOperationsImpairmentOfOilAndGasProperties
|
948307000 | USD |
| CY2017 | us-gaap |
Results Of Operations Impairment Of Oil And Gas Properties
ResultsOfOperationsImpairmentOfOilAndGasProperties
|
0 | USD |
| CY2018 | us-gaap |
Results Of Operations Impairment Of Oil And Gas Properties
ResultsOfOperationsImpairmentOfOilAndGasProperties
|
0 | USD |
| CY2016 | us-gaap |
Results Of Operations Income Tax Expense
ResultsOfOperationsIncomeTaxExpense
|
-368940000 | USD |
| CY2017 | us-gaap |
Results Of Operations Income Tax Expense
ResultsOfOperationsIncomeTaxExpense
|
86657000 | USD |
| CY2018 | us-gaap |
Results Of Operations Income Tax Expense
ResultsOfOperationsIncomeTaxExpense
|
72723000 | USD |
| CY2016 | us-gaap |
Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs
ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts
|
-504865000 | USD |
| CY2017 | us-gaap |
Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs
ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts
|
143714000 | USD |
| CY2018 | us-gaap |
Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs
ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts
|
183002000 | USD |
| CY2016 | us-gaap |
Results Of Operations Production Or Lifting Costs
ResultsOfOperationsProductionOrLiftingCosts
|
153914000 | USD |
| CY2017 | us-gaap |
Results Of Operations Production Or Lifting Costs
ResultsOfOperationsProductionOrLiftingCosts
|
165991000 | USD |
| CY2018 | us-gaap |
Results Of Operations Production Or Lifting Costs
ResultsOfOperationsProductionOrLiftingCosts
|
162721000 | USD |
| CY2016 | us-gaap |
Results Of Operations Revenue From Oil And Gas Producing Activities
ResultsOfOperationsRevenueFromOilAndGasProducingActivities
|
386152000 | USD |
| CY2017 | us-gaap |
Results Of Operations Revenue From Oil And Gas Producing Activities
ResultsOfOperationsRevenueFromOilAndGasProducingActivities
|
526492000 | USD |
| CY2018 | us-gaap |
Results Of Operations Revenue From Oil And Gas Producing Activities
ResultsOfOperationsRevenueFromOilAndGasProducingActivities
|
558896000 | USD |
| CY2017Q3 | us-gaap |
Revenues
Revenues
|
286937000 | USD |
| CY2017 | us-gaap |
Revenues
Revenues
|
1579881000 | USD |
| CY2017Q4 | us-gaap |
Revenues
Revenues
|
419655000 | USD |
| CY2018Q1 | us-gaap |
Revenues
Revenues
|
540905000 | USD |
| CY2018Q2 | us-gaap |
Revenues
Revenues
|
342912000 | USD |
| CY2018Q3 | us-gaap |
Revenues
Revenues
|
289196000 | USD |
| CY2018 | us-gaap |
Revenues
Revenues
|
1592668000 | USD |
| CY2016 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
5755000 | USD |
| CY2017 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
12262000 | USD |
| CY2018 | us-gaap |
Share Based Compensation
ShareBasedCompensation
|
15762000 | USD |
| CY2018Q3 | us-gaap |
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant
ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
|
1478086 | shares |
| CY2016 | us-gaap |
Results Of Operations Sales Or Transfers To Entitys Other Operations
ResultsOfOperationsSalesOrTransfersToEntitysOtherOperations
|
1765000 | USD |
| CY2017 | us-gaap |
Results Of Operations Sales Or Transfers To Entitys Other Operations
ResultsOfOperationsSalesOrTransfersToEntitysOtherOperations
|
2357000 | USD |
| CY2018 | us-gaap |
Results Of Operations Sales Or Transfers To Entitys Other Operations
ResultsOfOperationsSalesOrTransfersToEntitysOtherOperations
|
2134000 | USD |
| CY2015Q3 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
1103200000 | USD |
| CY2016Q3 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
676361000 | USD |
| CY2017Q3 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
851669000 | USD |
| CY2018Q3 | us-gaap |
Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
|
1098900000 | USD |
| CY2016 | us-gaap |
Revenues
Revenues
|
1452416000 | USD |
| CY2016Q4 | us-gaap |
Revenues
Revenues
|
422500000 | USD |
| CY2017Q1 | us-gaap |
Revenues
Revenues
|
522075000 | USD |
| CY2017Q2 | us-gaap |
Revenues
Revenues
|
348369000 | USD |
| CY2017Q3 | us-gaap |
Short Term Bank Loans And Notes Payable
ShortTermBankLoansAndNotesPayable
|
0 | USD |
| CY2018Q3 | us-gaap |
Short Term Bank Loans And Notes Payable
ShortTermBankLoansAndNotesPayable
|
0 | USD |
| CY2017Q3 | us-gaap |
Short Term Borrowings
ShortTermBorrowings
|
0 | USD |
| CY2018Q3 | us-gaap |
Short Term Borrowings
ShortTermBorrowings
|
0 | USD |
| CY2018 | us-gaap |
Stock Issued During Period Shares Dividend Reinvestment Plan
StockIssuedDuringPeriodSharesDividendReinvestmentPlan
|
138997 | shares |
| CY2018 | us-gaap |
Stock Issued During Period Shares Employee Benefit Plan
StockIssuedDuringPeriodSharesEmployeeBenefitPlan
|
75745 | shares |
| CY2018 | us-gaap |
Stock Issued During Period Shares Stock Options Exercised
StockIssuedDuringPeriodSharesStockOptionsExercised
|
75971 | shares |
| CY2018 | us-gaap |
Stock Repurchased During Period Shares
StockRepurchasedDuringPeriodShares
|
57065 | shares |
| CY2017Q3 | us-gaap |
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
|
1703735000 | USD |
| CY2018Q3 | us-gaap |
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
|
1937330000 | USD |
| CY2016 | us-gaap |
Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
|
81714000 | USD |
| CY2017 | us-gaap |
Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
|
84995000 | USD |
| CY2018 | us-gaap |
Taxes Excluding Income And Excise Taxes
TaxesExcludingIncomeAndExciseTaxes
|
84393000 | USD |
| CY2017Q3 | us-gaap |
Unamortized Loss Reacquired Debt Noncurrent
UnamortizedLossReacquiredDebtNoncurrent
|
1159000 | USD |
| CY2018Q3 | us-gaap |
Unamortized Loss Reacquired Debt Noncurrent
UnamortizedLossReacquiredDebtNoncurrent
|
15975000 | USD |
| CY2018 | us-gaap |
Unrealized Gain Loss On Price Risk Cash Flow Derivatives Before Tax
UnrealizedGainLossOnPriceRiskCashFlowDerivativesBeforeTax
|
-37400000 | USD |
| CY2015Q3 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
5085000 | USD |
| CY2016Q3 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
396000 | USD |
| CY2017Q3 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
1251000 | USD |
| CY2018Q3 | us-gaap |
Unrecognized Tax Benefits
UnrecognizedTaxBenefits
|
0 | USD |
| CY2016 | us-gaap |
Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
|
1314000 | USD |
| CY2017 | us-gaap |
Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
|
396000 | USD |
| CY2018 | us-gaap |
Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
|
788000 | USD |
| CY2016 | us-gaap |
Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities
UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
|
3771000 | USD |
| CY2017 | us-gaap |
Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities
UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
|
0 | USD |
| CY2018 | us-gaap |
Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities
UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
|
463000 | USD |
| CY2016 | us-gaap |
Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
|
396000 | USD |
| CY2017 | us-gaap |
Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
|
1251000 | USD |
| CY2018 | us-gaap |
Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions
UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
|
0 | USD |
| CY2017Q3 | us-gaap |
Unrecovered Costs For Purchased Gas Amount
UnrecoveredCostsForPurchasedGasAmount
|
4623000 | USD |
| CY2018Q3 | us-gaap |
Unrecovered Costs For Purchased Gas Amount
UnrecoveredCostsForPurchasedGasAmount
|
4204000 | USD |
| CY2017Q3 | us-gaap |
Unsecured Debt
UnsecuredDebt
|
2399000000 | USD |
| CY2018Q3 | us-gaap |
Unsecured Debt
UnsecuredDebt
|
2149000000 | USD |
| CY2016 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
84847993 | shares |
| CY2017 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
86021386 | shares |
| CY2018 | us-gaap |
Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
|
86439698 | shares |
| CY2016 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
84847993 | shares |
| CY2017 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
85364929 | shares |
| CY2018 | us-gaap |
Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
|
85830597 | shares |
