Derivatives - Gain (loss) on derivatives (Details) - USD ($) $ in Thousands |
3 Months Ended | |
---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
|
Derivative financial instruments | ||
Cash settlements received for early terminations of derivatives, net | $ 0 | $ 80,000 |
Derivatives not designated as hedges | Commodity derivatives | ||
Derivative financial instruments | ||
Cash settlements received for matured derivatives, net(1) | 7,451 | 65,937 |
Cash settlements received for early terminations of derivatives, net | 0 | 80,000 |
Cash settlements received for derivatives, net | $ 7,451 | 145,937 |
Deferred premium | $ 4,000 |