Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ (2,442)	$ 21,701	$ 96,282
Other Comprehensive Income:
Unrealized gains (losses) related to price risk management transactions, before taxes	0	1,210	(520)
Provision (benefits) for income taxes	0	440	(190)
Unrealized gains (losses) related to price risk management transactions, net of taxes	0	770	(330)
Less: reclassification of (gains) losses on price risk management transactions to net income, before taxes	0	(1,210)	738
(Provision) benefit for income taxes	0	(440)	270
Reclassification of (gains) losses on price risk management transactions to net income, net of taxes	0	(770)	468
Other comprehensive income, before income taxes	0	0	218
Provision for income taxes	0	0	80
Other comprehensive income, net of taxes	0	0	138
Comprehensive Income	$ (2,442)	$ 21,701	$ 96,420