Comprehensive (Loss) Income (Tables)

6 Months Ended

Jun. 30, 2011

Comprehensive (Loss) Income (Tables) [Abstract]

Comprehensive (loss) income

	Three Months Ended
	June 30,
	2011			2010
Net income (loss)	$	8,637		$	(22,720	)
Unrealized (loss) gain on natural gas swaps, net of deferred taxes of $(20) and $105		(36	)		162
Unrealized gain on interest rate swaps, net of deferred taxes of $1,982 and $1,577		3,549			2,758
Other		—			(32	)
Comprehensive income (loss)	$	12,150		$	(19,832	)

	Six Months Ended
	June 30,
	2011		2010
Net income (loss)	$	6,680	$	(24,570	)
Unrealized gain (loss) on natural gas swaps, net of deferred taxes of $2 and $0		4		(4	)
Unrealized gain on interest rate swaps, net of deferred taxes of $3,818 and $2,029		6,880		3,570
Other		38		(44	)
Comprehensive income (loss)	$	13,602	$	(21,048	)

Rollforward of amounts included in accumulated other comprehensive loss related to fair value of financial derivative instruments that qualify for hedge accounting, net of taxes

	Interest Rate			Natural Gas			Total
	Derivatives			Derivatives			Derivatives
Balance at December 31, 2010	$	(7,860	)	$	(145	)	$	(8,005	)
2011 changes in fair value, net of deferred taxes		6,880			4			6,884
Reclassification to earnings		—			—			—
Balance at June 30, 2011	$	(980	)	$	(141	)	$	(1,121	)