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v3.3.1.900

Fair Value Measurements (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Assets: |  |  |  |  |
Derivatives |  | $ 488,411 |  | $ 592,208 |
Proved oil and gas properties |  | 7,606,405 |  | 7,348,436 |
Property, Plant and Equipment, Other, Net |  | 153,100 |  | 334,356 |
Oil and gas properties held for sale |  | 641 |  | 17,891 |
Liabilities [Abstract] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability |  | 8 |  | 70 |
Net Profits Plan Liability Noncurrent |  | 7,611 |  | 27,136 |
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |
Assets: |  |  |  |  |
Derivatives |  | 0 | [1] | 0 | [2]
Liabilities [Abstract] |  |  |  |  |
Net Profits Plan Liability Noncurrent |  | 0 | [1] | 0 | [2]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |
Liabilities [Abstract] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability |  | 0 | [1] | 0 | [2]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |
Assets: |  |  |  |  |
Derivatives |  | 488,411 | [2] | 592,208 | [1]
Liabilities [Abstract] |  |  |  |  |
Net Profits Plan Liability Noncurrent |  | 0 | [1] | 0 | [2]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |
Assets: |  |  |  |  |
Derivatives |  | 488,411 |  | 592,208 |
Liabilities [Abstract] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability |  | 8 | [2] | 70 | [1]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Assets: |  |  |  |  |
Derivatives |  | 0 | [1] | 0 | [2]
Liabilities [Abstract] |  |  |  |  |
Net Profits Plan Liability Noncurrent |  | 7,611 | [1] | 27,136 | [2]
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |
Liabilities [Abstract] |  |  |  |  |
Derivative Liability, Fair Value, Gross Liability |  | 0 | [1] | 0 | [2]
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |
Assets: |  |  |  |  |
Proved oil and gas properties |  | 0 | [3] | 0 | [4]
Property, Plant and Equipment, Other, Net | [4] | 0 |  |  |
Oil and gas properties held for sale | [4] |  |  | 0 |
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |
Assets: |  |  |  |  |
Proved oil and gas properties |  | 0 | [3] | 0 | [4]
Property, Plant and Equipment, Other, Net | [4] | 0 |  |  |
Oil and gas properties held for sale | [4] |  |  | 0 |
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Assets: |  |  |  |  |
Proved oil and gas properties |  | 124,184 | [3] | 33,423 | [4]
Property, Plant and Equipment, Other, Net | [4] | $ 629 |  |  |
Oil and gas properties held for sale | [4] |  |  | $ 17,891 |
[1] | This represents a financial asset or liability that is measured at fair value on a recurring basis.
[2] | This represents a financial asset or liability that is measured at fair value on a recurring basis.
[3] | This represents a non-financial asset that is measured at fair value on a nonrecurring basis.
[4] | This represents a non-financial asset that is measured at fair value on a nonrecurring basis.

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