|
Derivative Financial Instruments - Changes in Fair Value of Commodity Derivative Contracts (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Gain Loss On Derivative Instruments Net Pretax [Abstract] | ||
| Derivative loss | $ 0us-gaap_GainLossOnDerivativeInstrumentsNetPretax | $ 7,492us-gaap_GainLossOnDerivativeInstrumentsNetPretax |
| X | ||||||||||
|
- Definition
Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|