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Accounts Receivable and Accounts Payable and Accrued Expenses Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Accounts Payable and Accrued Liabilities, Current [Abstract] |  |
Capital Expenditures Incurred but Not yet Paid - Instant | $ 97,355 | $ 357,156
Accrued Revenue And Severance Tax Payable | 44,387 | 63,779
Accrued Lease Operating Expense | 21,943 | 34,822
Accrual for Taxes Other than Income Taxes, Current | 14,078 | 15,059
Employee-related Liabilities, Current | 41,154 | 56,279
Interest Payable, Current | 34,378 | 40,786
Other Accrued Liabilities, Current | 49,222 | 72,803
Accounts payable and accrued expenses | $ 302,517 | $ 640,684

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