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Exhibit 12

Ratio of Earnings to Fixed Charges

		December 31,
		2006			2007			2008			2009			2010
Income (loss) before income tax expense			73,955			38,701			(54,063	)		(85,627	)		(53,856	)
Equity in earnings (loss) of equity-method investees			(1,721	)		(1,042	)		(448	)		53			(383	)
Net income (loss) before equity in earnings (loss) of equity method investees			72,234			37,659			(54,511	)		(85,575	)		(54,239	)
Add fixed charges:
	Interest expense including amortization of debt issuance costs		54,843			70,772			78,071			87,498			101,613
	Estimate of interest within rental expense		4,755			4,699			6,885			6,179			5,856
			59,598			75,471			84,956			93,677			107,469
	Adjusted earnings		131,832			113,130			30,445			8,103			53,230
Ratio of earnings to fixed charges (1)			2.2			1.5			0.4			0.1			0.5

(1)

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

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Exhibit 12

Ratio of Earnings to Fixed Charges