Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges

(in thousands)

	Nine months ended September 30, 2009		Year ended December 31, 2008		Year ended December 31, 2007		Year ended December 31, 2006		Year ended December 31, 2005		Period May 13, to Dec. 31, 2004	Period Jan. 1, to Sept. 30, 2004
Earnings:
Pretax income	42,488		(49,897	)	(233,855	)	(18,277	)	49,299		7,020	(107,663	)
Fixed charges	41,020		52,147		45,365		21,417		16,199		3,865	115,483
Amortization of capitalized interest	327		255		32		—		—		—	—
Capitalized interest	(191	)	(5,946	)	(5,057	)	(990	)	(293	)	—	—
Total earnings	83,644		(3,441	)	(193,515	)	2,150		65,205		10,885	7,820
Fixed charges:
Interest expense	35,813		46,737		35,923		17,303		13,356		3,187	114,211
Amortized premiums, discounts and capitalized expenses related to indebtedness	5,184		5,367		9,140		3,418		1,784		266	—
Estimated interest expense within rental expense	23		43		302		696		1,059		412	1,272
Total fixed charges	41,020		52,147		45,365		21,417		16,199		3,865	115,483
Ratio of earnings to fixed charges	2.04		—		—		0.10		4.03		2.82	0.07