CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Net income (loss)	$ 32,521		$ (75,610)
Other comprehensive income (loss):
Realized loss (gain) on hedge derivative contract settlements reclassified into natural gas, NGLs and oil sales from other comprehensive income, net of taxes			(14,840)	[1]
De-designated hedges reclassified into natural gas, NGLs and oil sales, net of taxes	(1,240)	[2]	(7,425)	[2]
De-designated hedges reclassified to derivative fair value income, net of taxes			(1,390)	[3]
Change in unrealized deferred hedging (losses) gains, net of taxes			(4,203)	[4]
Total comprehensive income (loss)	$ 31,281		$ (103,468)

[1] Amounts are net of income tax benefit of $9,488 for the three months ended March 31, 2013.

[2] Amounts are net of income tax benefit of $924 for the three months ended March 31, 2014 and $4,747 for the three months ended March 31, 2013.

[3] Amounts relate to transactions not probable of occurring and are presented net of income tax benefit of $889 for the three months ended March 31, 2013.

[4] Amounts are net of income tax benefit of $2,687 for the three months ended March 31, 2013.