Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2011

Comprehensive Income (Loss) (Tables) [Abstract]

Comprehensive income (loss)

	Three Months Ended September 30,
	2011			2010
Net loss	$	(1,606	)	$	(31,780	)
Unrealized loss on natural gas swaps, net of deferred taxes of $(45) and $(165)		(80	)		(292	)
Unrealized gain on interest rate swaps, net of deferred taxes of $548 and $1,092		980			2,007
Other		(6	)		19
Comprehensive loss	$	(712	)	$	(30,046	)

	Nine Months Ended September 30,
	2011			2010
Net income (loss)	$	5,074		$	(56,350	)
Unrealized loss on natural gas swaps, net of deferred taxes of $(43) and $(165)		(76	)		(296	)
Unrealized gain on interest rate swaps, net of deferred taxes of $4,366 and $3,121		7,860			5,577
Other		32			(25	)
Comprehensive income (loss)	$	12,890		$	(51,094	)

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 Derivatives			Natural Gas Derivatives			Total Derivatives
Balance at December 31, 2010	$	(7,860	)	$	(145	)	$	(8,005	)
2011 changes in fair value, net of deferred taxes		7,860			(76	)		7,784
Reclassification to earnings		—			—			—
Balance at September 30, 2011	$	—		$	(221	)	$	(221	)