Income Taxes (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2012

Dec. 31, 2011

Income Taxes

Schedule of provision (benefit) for income taxes

	Year Ended December 31,
	2011			2010		2009
Current—State	$	385		$	291	$	221
Current—Federal		—			—		57
Deferred		(8,728	)		1,401		(11,767	)
	$	(8,343	)	$	1,692	$	(11,489	)

Schedule of reconciliations between the entity's effective income tax rate and the U.S. statutory rate

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Statutory U.S. Federal income tax rate	(35.0	)%	(35.0	)%	(35.0	)%	(35.0	)%
State income taxes, net of U.S. Federal income tax	(3.3	)	(3.7	)	(2.9	)	(3.6	)
Permanent items	0.2		3.3		0.9		2.8
Valuation allowance	38.1		36.7		24.8		3.3
Other	0.4		(3.7	)	0.6		1.2
Effective income tax rate	0.4	%	(2.4	)%	(11.6	)%	(31.3	)%

	Year Ended December 31,
	2011			2010			2009
Statutory U.S. Federal income tax rate		(35.0	)%		(35.0	)%		(35.0	)%
State income taxes, net of U.S. Federal income tax		(3.4	)		(4.0	)		(4.8	)
Valuation allowance		5.8			42.2			—
Permanent items		2.3			1.0			0.7
Deferred item adjustments		2.7			2.0			0.9
Effective income tax rate		(27.6	)%		6.2	%		(38.2	)%

Schedule of components of deferred tax assets and liabilities

(in thousands)	December 31, 2011			December 31, 2010
Deferred tax assets
Accounts receivable	$	753		$	780
Accrued compensation and pension		8,593			7,701
Inventories		494			335
Other assets		2,263			3,836
Unrealized loss on cash flow hedge		1,868			6,372
Unrealized loss on pension		4,464			2,818
Net operating loss carryforwards		62,577			50,263
Deferred tax assets		81,012			72,105
Valuation allowance		(15,052	)		(11,958	)
Deferred tax assets		65,960			60,147
Deferred tax liabilities
Accelerated depreciation and amortization		(128,503	)		(118,403	)
Prepaid assets		(786	)		(692	)
Total deferred tax liabiliites		(129,289	)		(119,095	)
Net deferred tax liability	$	(63,329	)	$	(58,948	)

Schedule of reconciliation of the beginning and ending amount of unrecognized tax benefit

(in thousands)
Unrecognized tax benefits balance at January 1, 2009	$	2,100
Gross increases for tax positions in 2009		—
Unrecognized tax benefits balance at December 31, 2009		2,100
Gross increases for tax positions in 2010		—
Unrecognized tax benefits balance at December 31, 2010		2,100
Gross increases for tax positions in current period		1,653
Unrecognized tax benefits balance at December 31, 2011	$	3,753