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sset 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Amounts paid to settle an asset retirement obligation are generally included in the operating section of the Statement of Cash Flows.","units":{"USD":[{"start":"2011-01-01","end":"2011-06-30","val":-4833000,"accn":"0001193125-11-243280","fy":2011,"fp":"Q2","form":"10-Q/A","filed":"2011-09-08"},{"start":"2011-07-01","end":"2011-09-30","val":-13457000,"accn":"0001104659-11-062593","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-09","frame":"CY2011Q3"}]}},"AssetRetirementObligationCurrent":{"label":"Asset Retirement Obligation, Current","description":"Current portion of the carrying amount of a liability for an asset retirement obligation. 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 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This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived 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Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.","units":{"USD":[{"start":"2011-01-01","end":"2011-06-30","val":276681000,"accn":"0001193125-11-243280","fy":2011,"fp":"Q2","form":"10-Q/A","filed":"2011-09-08"},{"start":"2011-04-01","end":"2011-06-30","val":254412000,"accn":"0001193125-11-243280","fy":2011,"fp":"Q2","form":"10-Q/A","filed":"2011-09-08","frame":"CY2011Q2"},{"start":"2011-01-01","end":"2011-09-30","val":372037000,"accn":"0001104659-11-062593","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-09"},{"start":"2011-07-01","end":"2011-09-30","val":101698000,"accn":"0001104659-11-062593","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-11-09","frame":"CY2011Q3"}]}},"BusinessCombinationSeparatelyRecognizedTransactionsRevenuesAndGainsRecognized":{"label":"Business Combination, Separately Recognized Transactions, Revenues and Gains Recognized","description":"The revenues and gains recognized recorded for each transaction with the acquiree that is recognized separately from the acquisition of assets and assumptions of liabilities in the business combination.","units":{"USD":[{"start":"2011-01-01","end":"2011-06-30","val":334324000,"accn":"0001193125-11-243280","fy":2011,"fp":"Q2","form":"10-Q/A","filed":"2011-09-08"},{"start":"2011-04-01","end":"2011-06-30","val":334324000,"accn":"0001193125-11-243280","fy":2011,"fp":"Q2","form":"10-Q/A","filed":"2011-09-08","frame":"CY2011Q2"}]}},"CapitalExpendituresIncurredButNotYetPaid":{"label":"Capital Expenditures Incurred but Not yet Paid","description":"Future cash outflow to pay for purchases of fixed assets that have occurred.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":17652000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":22275000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":9659000,"accn":"0001301063-15-000030","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-06","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":20260000,"accn":"0001301063-15-000055","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-03"},{"start":"2014-01-01","end":"2014-12-31","val":26845000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2014"},{"start":"2015-01-01","end":"2015-03-31","val":19502000,"accn":"0001301063-15-000030","fy":2015,"fp":"Q1","form":"10-Q","filed":"2015-05-06","frame":"CY2015Q1"},{"start":"2015-01-01","end":"2015-06-30","val":28837000,"accn":"0001301063-15-000055","fy":2015,"fp":"Q2","form":"10-Q","filed":"2015-08-03"}]}},"CapitalLeasedAssetsGross":{"label":"Capital Leased Assets, Gross","description":"Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.","units":{"USD":[{"end":"2011-12-31","val":30190000,"accn":"0001301063-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01","frame":"CY2011Q4I"},{"end":"2012-12-31","val":84044000,"accn":"0001301063-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01"},{"end":"2012-12-31","val":84044000,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28","frame":"CY2012Q4I"},{"end":"2013-12-31","val":92105000,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28"},{"end":"2013-12-31","val":92105000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2013Q4I"},{"end":"2014-12-31","val":100540000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2014Q4I"}]}},"CapitalLeaseObligations":{"label":"Capital Lease Obligations","description":"Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.","units":{"USD":[{"end":"2012-09-30","val":45093000,"accn":"0001301063-12-000100","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":66976000,"accn":"0001301063-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01"},{"end":"2012-12-31","val":66976000,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28","frame":"CY2012Q4I"},{"end":"2013-12-31","val":58874000,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28"},{"end":"2013-12-31","val":58874000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2013Q4I"},{"end":"2014-12-31","val":51362000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2014Q4I"}]}},"CapitalLeaseObligationsIncurred":{"label":"Lease Obligation Incurred","description":"Amount of increase in lease obligation from new lease.","units":{"USD":[{"start":"2010-01-01","end":"2010-12-31","val":0,"accn":"0001301063-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01","frame":"CY2010"},{"start":"2011-01-01","end":"2011-06-30","val":0,"accn":"0001301063-12-000072","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-09"},{"start":"2011-01-01","end":"2011-09-30","val":0,"accn":"0001301063-12-000100","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001301063-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01"},{"start":"2011-01-01","end":"2011-12-31","val":0,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28","frame":"CY2011"},{"start":"2012-01-01","end":"2012-06-30","val":26527000,"accn":"0001301063-12-000072","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-08-09"},{"start":"2012-01-01","end":"2012-09-30","val":28569000,"accn":"0001301063-12-000100","fy":2012,"fp":"Q3","form":"10-Q","filed":"2012-11-08"},{"start":"2012-01-01","end":"2012-12-31","val":53192000,"accn":"0001301063-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01"},{"start":"2012-01-01","end":"2012-12-31","val":53192000,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28"},{"start":"2012-01-01","end":"2012-12-31","val":53192000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":8153000,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28"},{"start":"2013-01-01","end":"2013-12-31","val":8153000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":11323000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2014"}]}},"CapitalLeasesFutureMinimumPaymentsDue":{"label":"Capital Leases, Future Minimum Payments Due","description":"Amount of minimum lease payments for capital leases.","units":{"USD":[{"end":"2012-12-31","val":118973000,"accn":"0001301063-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01","frame":"CY2012Q4I"},{"end":"2013-12-31","val":106913000,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28","frame":"CY2013Q4I"},{"end":"2014-12-31","val":95842000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2014Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsDueCurrent":{"label":"Capital Leases, Future Minimum Payments Due, Next Twelve Months","description":"Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2012-12-31","val":18899000,"accn":"0001301063-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01","frame":"CY2012Q4I"},{"end":"2013-12-31","val":21446000,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28","frame":"CY2013Q4I"},{"end":"2014-12-31","val":19311000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2014Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsDueInFiveYears":{"label":"Capital Leases, Future Minimum Payments Due in Five Years","description":"Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2012-12-31","val":6424000,"accn":"0001301063-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01","frame":"CY2012Q4I"},{"end":"2013-12-31","val":2909000,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28","frame":"CY2013Q4I"},{"end":"2014-12-31","val":2962000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2014Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsDueInFourYears":{"label":"Capital Leases, Future Minimum Payments Due in Four Years","description":"Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2012-12-31","val":8060000,"accn":"0001301063-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01","frame":"CY2012Q4I"},{"end":"2013-12-31","val":6633000,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28","frame":"CY2013Q4I"},{"end":"2014-12-31","val":3057000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2014Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsDueInThreeYears":{"label":"Capital Leases, Future Minimum Payments Due in Three Years","description":"Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2012-12-31","val":12722000,"accn":"0001301063-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01","frame":"CY2012Q4I"},{"end":"2013-12-31","val":8776000,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28","frame":"CY2013Q4I"},{"end":"2014-12-31","val":9966000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2014Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsDueInTwoYears":{"label":"Capital Leases, Future Minimum Payments Due in Two Years","description":"Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2012-12-31","val":18572000,"accn":"0001301063-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01","frame":"CY2012Q4I"},{"end":"2013-12-31","val":15762000,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28","frame":"CY2013Q4I"},{"end":"2014-12-31","val":12067000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2014Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsDueThereafter":{"label":"Capital Leases, Future Minimum Payments Due Thereafter","description":"Amount of minimum lease payments for capital leases due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2012-12-31","val":54296000,"accn":"0001301063-13-000010","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-01","frame":"CY2012Q4I"},{"end":"2013-12-31","val":51387000,"accn":"0001301063-14-000016","fy":2013,"fp":"FY","form":"10-K","filed":"2014-02-28","frame":"CY2013Q4I"},{"end":"2014-12-31","val":48479000,"accn":"0001301063-15-000015","fy":2014,"fp":"FY","form":"10-K","filed":"2015-02-26","frame":"CY2014Q4I"}]}},"CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments":{"label":"Capital Leases, Future Minimum Payments, Interest Included in Payments","description":"Amount necessary to reduce net minimum lease payments to present value for capital 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period (for example, cash that was held by the acquired 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and Cash Equivalents, at Carrying Value","description":"Amount of currency on hand as well as demand deposits with banks or financial institutions. 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Amount excludes temporary equity. Alternate caption for the concept is permanent 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