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Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2009-12-31","val":25878000,"accn":"0001104659-10-053819","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-10-27"},{"end":"2009-12-31","val":25878000,"accn":"0001104659-10-045198","fy":2010,"fp":"Q2","form":"10-Q/A","filed":"2010-08-19"},{"end":"2009-12-31","val":25878000,"accn":"0001047469-11-001586","fy":2010,"fp":"FY","form":"10-K","filed":"2011-03-01","frame":"CY2009Q4I"},{"end":"2010-06-30","val":23234000,"accn":"0001104659-10-045198","fy":2010,"fp":"Q2","form":"10-Q/A","filed":"2010-08-19","frame":"CY2010Q2I"},{"end":"2010-09-30","val":28160000,"accn":"0001104659-10-053819","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-10-27","frame":"CY2010Q3I"},{"end":"2010-12-31","val":37812000,"accn":"0001047469-11-008998","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":37812000,"accn":"0001047469-11-006981","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05"},{"end":"2010-12-31","val":37812000,"accn":"0001047469-11-004246","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-04-29"},{"end":"2010-12-31","val":37812000,"accn":"0001047469-11-001586","fy":2010,"fp":"FY","form":"10-K","filed":"2011-03-01"},{"end":"2010-12-31","val":37812000,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2010Q4I"},{"end":"2011-03-31","val":23685000,"accn":"0001047469-11-004246","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-04-29","frame":"CY2011Q1I"},{"end":"2011-06-30","val":33492000,"accn":"0001047469-11-006981","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05","frame":"CY2011Q2I"},{"end":"2011-09-30","val":40209000,"accn":"0001047469-11-008998","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":49253000,"accn":"0000778438-12-000024","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-04-27","frame":"CY2011Q4I"},{"end":"2011-12-31","val":49253000,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28"},{"end":"2012-03-31","val":25412000,"accn":"0000778438-12-000024","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-04-27","frame":"CY2012Q1I"}]}},"AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment":{"label":"Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment","description":"Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.","units":{"USD":[{"end":"2010-12-31","val":25773000,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2010Q4I"},{"end":"2011-12-31","val":29469000,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011Q4I"},{"end":"2011-12-31","val":29469000,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28"},{"end":"2012-12-31","val":25340000,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012Q4I"}]}},"AccumulatedOtherComprehensiveIncomeLossNetOfTax":{"label":"Accumulated Other Comprehensive Income (Loss), Net of Tax","description":"Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.","units":{"USD":[{"end":"2009-12-31","val":-60372000,"accn":"0001104659-10-053819","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-10-27"},{"end":"2009-12-31","val":-60372000,"accn":"0001104659-10-045198","fy":2010,"fp":"Q2","form":"10-Q/A","filed":"2010-08-19"},{"end":"2009-12-31","val":-60372000,"accn":"0001047469-11-001586","fy":2010,"fp":"FY","form":"10-K","filed":"2011-03-01","frame":"CY2009Q4I"},{"end":"2010-06-30","val":-52928000,"accn":"0001104659-10-045198","fy":2010,"fp":"Q2","form":"10-Q/A","filed":"2010-08-19","frame":"CY2010Q2I"},{"end":"2010-09-30","val":-48533000,"accn":"0001104659-10-053819","fy":2010,"fp":"Q3","form":"10-Q","filed":"2010-10-27","frame":"CY2010Q3I"},{"end":"2010-12-31","val":-43806000,"accn":"0001047469-11-008998","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"end":"2010-12-31","val":-43806000,"accn":"0001047469-11-006981","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05"},{"end":"2010-12-31","val":-43806000,"accn":"0001047469-11-004246","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-04-29"},{"end":"2010-12-31","val":-43806000,"accn":"0001047469-11-001586","fy":2010,"fp":"FY","form":"10-K","filed":"2011-03-01"},{"end":"2010-12-31","val":-43806000,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2010Q4I"},{"end":"2011-03-31","val":-34283000,"accn":"0001047469-11-004246","fy":2011,"fp":"Q1","form":"10-Q","filed":"2011-04-29","frame":"CY2011Q1I"},{"end":"2011-06-30","val":-24761000,"accn":"0001047469-11-006981","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05","frame":"CY2011Q2I"},{"end":"2011-09-30","val":-15157000,"accn":"0001047469-11-008998","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03","frame":"CY2011Q3I"},{"end":"2011-12-31","val":-5517000,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011Q4I"},{"end":"2011-12-31","val":-5517000,"accn":"0000778438-12-000043","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"end":"2011-12-31","val":-5517000,"accn":"0000778438-12-000034","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"end":"2011-12-31","val":-5517000,"accn":"0000778438-12-000024","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-04-27"},{"end":"2011-12-31","val":-5517000,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28"},{"end":"2012-03-31","val":-4250000,"accn":"0000778438-12-000024","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-04-27","frame":"CY2012Q1I"},{"end":"2012-06-30","val":-3241000,"accn":"0000778438-12-000034","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":-1736000,"accn":"0000778438-12-000043","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01","frame":"CY2012Q3I"},{"end":"2012-12-31","val":0,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012Q4I"}]}},"AdditionalPaidInCapital":{"label":"Additional Paid in Capital","description":"Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.","units":{"USD":[{"end":"2013-12-31","val":2315460000,"accn":"0000778438-14-000013","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2013Q4I"},{"end":"2014-03-31","val":2315460000,"accn":"0000778438-14-000013","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-12-31","val":2416381000,"accn":"0000778438-15-000007","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-05"},{"end":"2014-12-31","val":2416381000,"accn":"0000778438-15-000011","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-07"},{"end":"2014-12-31","val":2416381000,"accn":"0000778438-15-000017","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-10","frame":"CY2014Q4I"},{"end":"2015-03-31","val":2372603000,"accn":"0000778438-15-000007","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-05","frame":"CY2015Q1I"},{"end":"2015-06-30","val":2609158000,"accn":"0000778438-15-000011","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-07","frame":"CY2015Q2I"},{"end":"2015-09-30","val":2757836000,"accn":"0000778438-15-000017","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-10","frame":"CY2015Q3I"},{"end":"2015-12-31","val":2798713000,"accn":"0000778438-16-000024","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-12"},{"end":"2015-12-31","val":2798713000,"accn":"0000778438-16-000028","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-11"},{"end":"2015-12-31","val":2798713000,"accn":"0000778438-16-000033","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-10","frame":"CY2015Q4I"},{"end":"2016-03-31","val":2798713000,"accn":"0000778438-16-000024","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-12","frame":"CY2016Q1I"},{"end":"2016-06-30","val":2798713000,"accn":"0000778438-16-000028","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-11","frame":"CY2016Q2I"},{"end":"2016-09-30","val":2798713000,"accn":"0000778438-16-000033","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-10","frame":"CY2016Q3I"}]}},"AdditionalPaidInCapitalCommonStock":{"label":"Additional Paid in Capital, Common Stock","description":"Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. 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This element is used when there is not a more specific and appropriate 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An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.","units":{"USD":[{"end":"2011-12-31","val":4763000,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011Q4I"},{"end":"2012-12-31","val":4430000,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28"},{"end":"2012-12-31","val":4430000,"accn":"0000778438-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2012Q4I"},{"end":"2013-12-31","val":3318000,"accn":"0000778438-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31"},{"end":"2013-12-31","val":3318000,"accn":"0000778438-14-000013","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12"},{"end":"2013-12-31","val":3318000,"accn":"0000778438-14-000021","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-13","frame":"CY2013Q4I"},{"end":"2014-03-31","val":3318000,"accn":"0000778438-14-000013","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":3318000,"accn":"0000778438-14-000021","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-13","frame":"CY2014Q2I"},{"end":"2014-12-31","val":3101000,"accn":"0000778438-15-000007","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-05"},{"end":"2014-12-31","val":3101000,"accn":"0000778438-15-000011","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-07"},{"end":"2014-12-31","val":3101000,"accn":"0000778438-15-000017","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-10","frame":"CY2014Q4I"},{"end":"2015-03-31","val":3101000,"accn":"0000778438-15-000007","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-05","frame":"CY2015Q1I"},{"end":"2015-06-30","val":3101000,"accn":"0000778438-15-000011","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-07","frame":"CY2015Q2I"},{"end":"2015-09-30","val":3101000,"accn":"0000778438-15-000017","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-10","frame":"CY2015Q3I"}]}},"AssetRetirementObligationLiabilitiesIncurred":{"label":"Asset Retirement Obligation, Liabilities Incurred","description":"Amount of asset retirement obligations incurred during the 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Retirement Obligation, Liabilities Settled","description":"Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.","units":{"USD":[{"start":"2010-01-01","end":"2010-06-30","val":1534000,"accn":"0001047469-11-006981","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05"},{"start":"2010-01-01","end":"2010-09-30","val":1830000,"accn":"0001047469-11-008998","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2010-01-01","end":"2010-12-31","val":1832000,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":103000,"accn":"0000778438-12-000024","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-04-27","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":864000,"accn":"0001047469-11-006981","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-05"},{"start":"2011-01-01","end":"2011-09-30","val":1921000,"accn":"0001047469-11-008998","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-12-31","val":1803000,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":467000,"accn":"0000778438-12-000024","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-04-27","frame":"CY2012Q1"},{"start":"2014-01-01","end":"2014-03-31","val":1566000,"accn":"0000778438-14-000013","fy":2014,"fp":"Q1","form":"10-Q","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":3266000,"accn":"0000778438-14-000021","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":4536000,"accn":"0000778438-14-000027","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-12"},{"start":"2015-01-01","end":"2015-03-31","val":89000,"accn":"0000778438-15-000007","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-05","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":284000,"accn":"0000778438-15-000011","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-07"},{"start":"2015-01-01","end":"2015-09-30","val":447000,"accn":"0000778438-15-000017","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-10"},{"start":"2016-01-01","end":"2016-03-31","val":1447000,"accn":"0000778438-16-000024","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":3293000,"accn":"0000778438-16-000028","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":3409000,"accn":"0000778438-16-000033","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-10"}]}},"AssetRetirementObligationRevisionOfEstimate":{"label":"Asset Retirement Obligation, Revision of Estimate","description":"Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2010"},{"start":"2011-01-01","end":"2011-03-31","val":0,"accn":"0000778438-12-000024","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-04-27","frame":"CY2011Q1"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0000778438-12-000034","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2011-01-01","end":"2011-09-30","val":4308000,"accn":"0001047469-11-008998","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-03"},{"start":"2011-01-01","end":"2011-09-30","val":4308000,"accn":"0000778438-12-000043","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2011-01-01","end":"2011-12-31","val":4465000,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28"},{"start":"2011-01-01","end":"2011-12-31","val":4465000,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011"},{"start":"2012-01-01","end":"2012-03-31","val":2001000,"accn":"0000778438-12-000024","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-04-27"},{"start":"2012-01-01","end":"2012-03-31","val":2001000,"accn":"0000778438-13-000012","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-08","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":10988000,"accn":"0000778438-12-000034","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-02"},{"start":"2012-01-01","end":"2012-06-30","val":10988000,"accn":"0000778438-13-000020","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-07"},{"start":"2012-01-01","end":"2012-09-30","val":10992000,"accn":"0000778438-12-000043","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-01"},{"start":"2012-01-01","end":"2012-09-30","val":10992000,"accn":"0000778438-13-000026","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-24"},{"start":"2012-01-01","end":"2012-12-31","val":10999000,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28"},{"start":"2012-01-01","end":"2012-12-31","val":10999000,"accn":"0000778438-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2012"},{"start":"2013-01-01","end":"2013-03-31","val":4311000,"accn":"0000778438-13-000012","fy":2013,"fp":"Q1","form":"10-Q","filed":"2013-05-08","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-06-30","val":5907000,"accn":"0000778438-13-000020","fy":2013,"fp":"Q2","form":"10-Q","filed":"2013-08-07"},{"start":"2013-01-01","end":"2013-09-30","val":5907000,"accn":"0000778438-13-000026","fy":2013,"fp":"Q3","form":"10-Q","filed":"2013-10-24"},{"start":"2013-01-01","end":"2013-12-16","val":5900000,"accn":"0000778438-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2013"},{"start":"2013-12-17","end":"2013-12-31","val":0,"accn":"0000778438-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31"},{"start":"2015-01-01","end":"2015-09-30","val":8319000,"accn":"0000778438-15-000017","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-10"},{"start":"2016-01-01","end":"2016-03-31","val":1545000,"accn":"0000778438-16-000024","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-12","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":1545000,"accn":"0000778438-16-000028","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-11"},{"start":"2016-01-01","end":"2016-09-30","val":1545000,"accn":"0000778438-16-000033","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-10"}]}},"AssetRetirementObligationsNoncurrent":{"label":"Asset 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Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the 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Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.","units":{"USD":[{"end":"2010-06-30","val":3300000,"accn":"0001104659-10-045198","fy":2010,"fp":"Q2","form":"10-Q/A","filed":"2010-08-19","frame":"CY2010Q2I"}]}},"LitigationSettlementAmount":{"label":"Litigation Settlement, Amount (Deprecated 2017-01-31)","description":"Amount of judgment or settlement awarded to (against) the entity in respect of litigation.","units":{"USD":[{"start":"2014-01-01","end":"2014-06-30","val":2400000,"accn":"0000778438-14-000021","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-13"},{"start":"2014-01-01","end":"2014-09-30","val":2400000,"accn":"0000778438-14-000027","fy":2014,"fp":"Q3","form":"10-Q","filed":"2014-11-12"},{"start":"2014-01-01","end":"2014-12-31","val":2400000,"accn":"0000778438-15-000003","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-05","frame":"CY2014"}]}},"LongTermDebt":{"label":"Long-term Debt","description":"Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. 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Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.","units":{"USD":[{"end":"2013-12-31","val":2301702000,"accn":"0000778438-14-000021","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-13","frame":"CY2013Q4I"},{"end":"2014-06-30","val":2121387000,"accn":"0000778438-14-000021","fy":2014,"fp":"Q2","form":"10-Q","filed":"2014-08-13","frame":"CY2014Q2I"},{"end":"2014-12-31","val":1872637000,"accn":"0000778438-15-000007","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-05"},{"end":"2014-12-31","val":1872637000,"accn":"0000778438-15-000011","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-07"},{"end":"2014-12-31","val":1872637000,"accn":"0000778438-15-000017","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-10","frame":"CY2014Q4I"},{"end":"2015-03-31","val":1883498000,"accn":"0000778438-15-000007","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-05","frame":"CY2015Q1I"},{"end":"2015-06-30","val":1837847000,"accn":"0000778438-15-000011","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-07","frame":"CY2015Q2I"},{"end":"2015-09-30","val":1442739000,"accn":"0000778438-15-000017","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-11-10","frame":"CY2015Q3I"}]}},"LongTermDebtNoncurrent":{"label":"Long-term Debt, Excluding Current Maturities","description":"Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. 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Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. 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Proved oil reserves are the estimated quantities of crude oil and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable.","units":{"MMcf":[{"end":"2011-12-31","val":534279,"accn":"0000778438-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2011Q4I"}],"mboe":[{"end":"2008-12-31","val":245940,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2008Q4I"},{"end":"2009-12-31","val":235303,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2009Q4I"},{"end":"2010-12-31","val":271213,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2010Q4I"},{"end":"2011-12-31","val":274926,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2011Q4I"}]}},"ProvedDevelopedAndUndevelopedReservesProduction":{"label":"Proved Developed and Undeveloped Reserves, Production","description":"Production of proved reserves.","units":{"mboe":[{"start":"2009-01-01","end":"2009-12-31","val":-10962,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":-11923,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":-13025,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2011"}]}},"ProvedDevelopedAndUndevelopedReservesPurchasesOfMineralsInPlace":{"label":"Proved Developed and Undeveloped Reserves, Purchases of Minerals in Place","description":"Purchase of minerals in place.","units":{"mboe":[{"start":"2009-01-01","end":"2009-12-31","val":6300,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":29636,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":14584,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2011"}]}},"ProvedDevelopedAndUndevelopedReservesRevisionsOfPreviousEstimatesIncreaseDecrease":{"label":"Proved Developed and Undeveloped Reserves, Revisions of Previous Estimates","description":"Revisions represent changes in previous estimates of proved reserves, either upward or downward, resulting from new information (except for an increase in proved acreage) normally obtained from development drilling and production history or resulting from change in economic factors.","units":{"mboe":[{"start":"2009-01-01","end":"2009-12-31","val":-2975,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":-3522,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":-28446,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2011"}]}},"ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace":{"label":"Proved Developed and Undeveloped Reserves, Sales of Minerals in Place","description":"Sales of minerals in place.","units":{"mboe":[{"start":"2009-01-01","end":"2009-12-31","val":-21100,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2009"},{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2011"}]}},"ProvedDevelopedReservesBOE":{"label":"Proved Developed Reserves (BOE) (Deprecated 2013-01-31)","description":"Net quantities of an enterprise's interests in proved developed reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. \"Net\" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in \"net\" quantities if the necessary information is available to the enterprise. \"Net\" quantities do not include reserves relating to interests of others in properties owned by the enterprise. Measured in barrel of oil equivalent (BOE).","units":{"MBoe":[{"end":"2010-12-31","val":133678,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2010Q4I"},{"end":"2011-12-31","val":144783,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011Q4I"},{"end":"2012-12-31","val":150216,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012Q4I"}],"mboe":[{"end":"2008-12-31","val":134879,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2008Q4I"},{"end":"2009-12-31","val":125456,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2009Q4I"},{"end":"2010-12-31","val":133678,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2010Q4I"},{"end":"2011-12-31","val":144783,"accn":"0000778438-12-000013","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-28","frame":"CY2011Q4I"}]}},"ProvedDevelopedReservesBOE1":{"label":"Proved Developed Reserves (Energy)","description":"Energy measure of interests in proved developed reserves of crude oil, including condensate and natural gas liquids, natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas.","units":{"MBoe":[{"end":"2011-12-31","val":144783,"accn":"0000778438-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2011Q4I"},{"end":"2012-12-31","val":150216,"accn":"0000778438-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2012Q4I"},{"end":"2013-12-16","val":156161,"accn":"0000778438-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31"},{"end":"2013-12-31","val":155494,"accn":"0000778438-14-000009","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-31","frame":"CY2013Q4I"}]}},"ProvedUndevelopedReserveBOE":{"label":"Proved Undeveloped Reserve (BOE) (Deprecated 2013-01-31)","description":"Net quantities of an enterprise's interests in proved undeveloped reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. \"Net\" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in \"net\" quantities if the necessary information is available to the enterprise. \"Net\" quantities do not include reserves relating to interests of others in properties owned by the enterprise. Measured in barrel of oil equivalent (BOE).","units":{"MBoe":[{"end":"2010-12-31","val":137535,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2010Q4I"},{"end":"2011-12-31","val":130143,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2011Q4I"},{"end":"2012-12-31","val":124913,"accn":"0000778438-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-02-28","frame":"CY2012Q4I"}]}},"ProvedUndevelopedReserveBOE1":{"label":"Proved Undeveloped Reserves (Energy)","description":"Energy measure of proved undeveloped reserves of crude oil, including condensate and natural gas liquids, natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and 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