Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges

(dollars in thousands)

	Year Ended
	December 31 2008		December 31 2009			December 31 2010			December 31 2011		December 31, 2012
											(actual)		(pro forma) (A)
Earnings
Pre-tax income		69,397		(18,121	)		(40,380	)		12,141		44,448		36,902
Fixed charges		42,193		35,756			33,284			32,988		39,818		47,364
Capitalized interest amortization		—		—			88			88		88		88
Less:
Interest capitalized		—		442			176			128		196		196
Total earnings		111,590		17,193			(7,184	)		45,089		84,158		84,158
Fixed Charges
Interest expense		38,255		31,339			29,076			28,727		35,541		43,087
Interest capitalized		—		442			176			128		196		196
Portion of rent estimated to represent the interest factor		3,938		3,975			4,032			4,133		4,081		4,081
Total fixed charges		42,193		35,756			33,284			32,988		39,818		47,364
Ratio (B)		2.64		—			—			1.37		2.11		1.78

(A) The pro forma ratio of earnings to fixed charges was calculated as if the issuance of the $100 aggregate principal amount of the add-on notes had closed on January 1, 2012. This would have resulted in additional interest expense of $7.5 million in 2012 on a pro forma basis.

(B) Due to the registrant’s loss, the ratio coverage was less than 1:1 in 2009 and 2010. To achieve a coverage ratio of 1:1, the registrant would need additional pre-tax earnings of $17,679 and $40,116 in 2009 and 2010, respectively.