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v3.6.0.2

Fair Value Measurements (Details 2) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Sep. 12, 2016 | Aug. 12, 2016 | May 21, 2015 | Nov. 17, 2014 | May 20, 2013 | Jun. 29, 2012 | Nov. 08, 2011
Proved Oil and Gas Properties |  |  |  |  |  |  |  |  |  |  |
Impairment of proved properties |  | $ 354,614 | $ 468,679 | $ 84,480 |  |  |  |  |  |  |
Abandonment and impairment of unproved properties |  | 80,367 | 78,643 | 75,638 |  |  |  |  |  |  |
Impairment of other property and equipment |  | $ 0 | 49,369 | 0 |  |  |  |  |  |  |
Oil and Gas Properties [Member] |  |  |  |  |  |  |  |  |  |  |
Proved Oil and Gas Properties |  |  |  |  |  |  |  |  |  |  |
Period of New York Mercantile Exchange Strip Pricing Used for Price Forecast |  | 5 years |  |  |  |  |  |  |  |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Net Profit Plan liability [Member] |  |  |  |  |  |  |  |  |  |  |
Fair Value, NPP Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net Profits Plan Liability: Beginning Balance |  | $ 7,611 | 27,136 | 56,985 |  |  |  |  |  |  |
Net increase (decrease) in liability | [1] | 23,757 | (12,238) | (12,492) |  |  |  |  |  |  |
Net settlements | [1],[2] | (30,957) | (7,287) | (17,357) |  |  |  |  |  |  |
Transfers in (out) of Level 3 |  | 0 | 0 | 0 |  |  |  |  |  |  |
Net Profits Plan Liability: Ending balance |  | $ 411 | 7,611 | $ 27,136 |  |  |  |  |  |  |
Minimum [Member] | Oil and Gas Properties [Member] |  |  |  |  |  |  |  |  |  |  |
Proved Oil and Gas Properties |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Discount Rate |  | 10.00% |  |  |  |  |  |  |  |  |
Maximum [Member] | Oil and Gas Properties [Member] |  |  |  |  |  |  |  |  |  |  |
Proved Oil and Gas Properties |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Discount Rate |  | 15.00% |  |  |  |  |  |  |  |  |
Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 2,803,736 | 2,350,000 |  |  |  |  |  |  |  |
Senior Notes [Member] | 6.50% Senior Notes Due 2021 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 6.50% |  |  |  |  |  |  |  |  | 6.50%
Debt Instrument, Face Amount |  | $ 346,955 | 350,000 |  |  |  |  |  |  |  | $ 350,000
Long-term Debt, Fair Value |  | $ 354,546 | 262,938 |  |  |  |  |  |  |  |
Senior Notes [Member] | 6.125% Senior Notes Due 2022 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 6.125% |  |  |  |  |  | 6.125% |  |  |
Debt Instrument, Face Amount |  | $ 561,796 | 600,000 |  |  |  |  | $ 600,000 |  |  |
Long-term Debt, Fair Value |  | $ 570,925 | 440,250 |  |  |  |  |  |  |  |
Senior Notes [Member] | 6.50% Senior Notes Due 2023 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 6.50% |  |  |  |  |  |  |  | 6.50% |
Debt Instrument, Face Amount |  | $ 394,985 | 400,000 |  |  |  |  |  |  | $ 400,000 |
Long-term Debt, Fair Value |  | $ 403,134 | 296,000 |  |  |  |  |  |  |  |
Senior Notes [Member] | 5% Senior Notes Due 2024 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 5.00% |  |  |  |  |  |  | 5.00% |  |
Debt Instrument, Face Amount |  | $ 500,000 | 500,000 |  |  |  |  |  | $ 500,000 |  |
Long-term Debt, Fair Value |  | $ 475,975 | 334,065 |  |  |  |  |  |  |  |
Senior Notes [Member] | 5.625% Senior Notes Due 2025 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 5.625% |  |  |  |  | 5.625% |  |  |  |
Debt Instrument, Face Amount |  | $ 500,000 | 500,000 |  |  |  | $ 500,000 |  |  |  |
Long-term Debt, Fair Value |  | $ 485,000 | 326,875 |  |  |  |  |  |  |  |
Senior Notes [Member] | 6.75% Senior Notes Due 2026 [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 6.75% |  |  | 6.75% |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 500,000 | 0 |  | $ 500,000 |  |  |  |  |  |
Long-term Debt, Fair Value |  | $ 516,565 | 0 |  |  |  |  |  |  |  |
Convertible Debt [Member] | 1.50% Senior Convertible Notes Due 2021 [Domain] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Fair Value Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 1.50% |  |  |  | 1.50% |  |  |  |  |
Debt Instrument, Face Amount |  | $ 172,500 | 0 |  |  | $ 172,500 |  |  |  |  |
Long-term Debt, Fair Value |  | $ 202,189 | $ 0 |  |  |  |  |  |  |  |
[1] | Net changes in the Company’s Net Profits Plan liability are shown in the change in Net Profits Plan liability line item of the accompanying statements of operations.
[2] | Settlements represent cash payments made or accrued under the Net Profits Plan and are recognized as compensation expense or a reduction to the net gain on divestiture activity line in the accompanying statements of operations, as discussed in Note 7 – Compensation Plans.

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- Definition Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition The adjustment to reduce the value of existing agreements that specify the lessee's rights to use the leased property. This expense is charged when the estimates of future profits generated by the leased property are reduced. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 + Details
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