Consolidated Statements Of Comprehensive (Loss) Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net (loss) income	$ 72,649	$ 66,461
Other comprehensive income, before tax:
Gains on hedging instrument	0	0
Other comprehensive income, before tax:	0	0
Income tax expense related to gains on hedging instrument	0	0
Other comprehensive income, net of tax:	0	0
Comprehensive (loss) income	$ 72,649	$ 66,461