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Derivative Instruments - Impact of Netting Agreements and Margin Deposits (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
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Asset derivatives: |  |
Derivative instruments, recorded in the Condensed Consolidated Balance Sheet, gross | $ 136,591 | $ 417,397
Liability derivatives: |  |
Derivative instruments, recorded in the Condensed Consolidated Balance Sheet, gross | 110,960 | 23,434
Commodity derivatives |  |
Asset derivatives: |  |
Derivative instruments, recorded in the Condensed Consolidated Balance Sheet, gross | 136,591 | 417,397
Derivative instruments subject to master netting agreements | (70,234) | (19,909)
Margin deposits remitted to counterparties | 0 | 0
Derivative instruments, net | 66,357 | 397,488
Liability derivatives: |  |
Derivative instruments, recorded in the Condensed Consolidated Balance Sheet, gross | 110,960 | 23,434
Derivative instruments subject to master netting agreements | (70,234) | (19,909)
Margin deposits remitted to counterparties | 0 | 0
Derivative instruments, net | $ 40,726 | $ 3,525

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