Exhibit 12

Ratio Earnings to Fixed Charges

	December 31,
	2004	2005	2006		2007		2008
Income before income tax expense	99,529	95,300	73,955		38,701		(54,063	)
Equity in losses of equity-method investees	615	42	(1,721	)	(1,042	)	(448	)
Net income before equity in losses of equity- method investees	100,144	95,342	72,234		37,659		(54,511	)
Add fixed charges:
Interest expense including amortization of debt issuance costs	31,184	37,272	54,843		70,772		78,071
Estimate of interest within rental expense	5,116	4,208	4,755		4,699		6,885
	36,300	41,480	59,598		75,471		84,956
Adjusted earnings	136,444	136,822	131,832		113,130		30,445
Ratio of earnings to fixed charges (1)	3.8	3.3	2.2		1.5		0.4

(1) The ratio of earnings to fixed charges is computed by dividing adjusted earnings by fixed charges.