CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014		Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (15,514)	$ 100,788		$ (2,767)	$ 326,239
Other comprehensive income (loss), net of taxes:
Reclassification adjustment for settled cash flow hedge contracts	0	12,965	[1]	0	69,337	[1]
Changes in fair value of cash flow hedge contracts	0	0		0	(80,175)	[2]
Total other comprehensive income (loss)	0	12,965		0	(10,838)
Comprehensive income (loss)	$ (15,514)	$ 113,753		$ (2,767)	$ 315,401

[1] Net of income taxes of $(8,592) and $(45,951) for the three and nine months ended September 30, 2014, respectively.

[2] Net of income taxes of $53,135 for the nine months ended September 30, 2014.