Consolidated Statements Of Comprehensive (Loss) Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net (loss) income	$ (9,264)	$ (5,264)	$ 57,197	$ 68,092
Other comprehensive income, before tax:
Gains on hedging instrument	0	0	0	0
Other comprehensive income, before tax:	0	0	0	0
Income tax expense related to gains on hedging instrument	0	0	0	0
Other comprehensive income, net of tax:	0	0	0	0
Comprehensive (loss) income	$ (9,264)	$ (5,264)	$ 57,197	$ 68,092