Exhibit 12.1

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

	Years Ended December 31,															Six Months Ended June 30,
	2012			2011			2010			2009			2008			2013			2012
	(in thousands, except ratios)
Fixed Charges:
Interest expense	$	119,265		$	102,069		$	69,534		$	41,823		$	20,856		$	53,254		$	60,460
Capitalized interest		—			—			—			—			—			—			—
Portion of rental expense which represents interest factor(1)		1,866			1,676			1,460			640			451			876			895
Total Fixed Charges	$	121,131		$	103,745		$	70,994		$	42,463		$	21,307		$	54,130		$	61,355
Earnings available for fixed charges:
Pretax loss from continuing operations		(190,679	)		(63,227	)		(24,638	)		(48,218	)		(27,171	)		(37,973	)		(26,889	)
Distributed equity income of affiliated companies		222			39			15			134			—			—			6
Add: Fixed charges		121,131			103,745			70,994			42,463			21,307			54,130			61,355
Total Earnings available for fixed charges	$	(69,326	)	$	40,557		$	46,371		$	(5,621	)	$	(5,864	)	$	16,157		$	34,472
Earnings for the period were insufficient to cover fixed charges by the following amounts:	$	(190,457	)	$	(63,188	)	$	(24,623	)	$	(48,084	)	$	(27,171	)	$	(37,973	)	$	(26,883	)
Ratio of earnings to fixed charges(2)		NM			NM			NM			NM			NM			NM			NM

(1) Represents the portion of rental expense deemed to be attributable to interest

(2) NM - Not meaningful