Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ (283,427)us-gaap_NetIncomeLoss	$ (2,442)us-gaap_NetIncomeLoss	$ 21,701us-gaap_NetIncomeLoss
Other Comprehensive Income:
Unrealized gains (losses) related to price risk management transactions, before taxes	0	0	1,210
Provision (benefits) for income taxes	0	0	440
Unrealized gains (losses) related to price risk management transactions, net of taxes	0	0	770
Less: reclassification of (gains) losses on price risk management transactions to net income, before taxes	0	0	(1,210)
(Provision) benefit for income taxes	0	0	(440)
Reclassification of (gains) losses on price risk management transactions to net income, net of taxes	0	0	(770)
Comprehensive Income	$ (283,427)us-gaap_ComprehensiveIncomeNetOfTax	$ (2,442)us-gaap_ComprehensiveIncomeNetOfTax	$ 21,701us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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