Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 67,522	$ 34,232	$ 178,827	$ 133,445
Other comprehensive income (loss), net of taxes:
Change in value of derivative instruments used as cash flow hedges, net of tax of $0, ($3,013), $0, and ($5,517)	0	(4,797)	0	(8,617)
Reclassification - derivative settlements, net of tax of $0, $1,240, $0, and $63	0	1,970	0	139
Ineffective portion of derivatives, net of tax of $0, $97, $0, and ($44)	0	155	0	(72)
Comprehensive income	$ 67,522	$ 31,560	$ 178,827	$ 124,895