Exhibit 12.1

RATIO OF EARNINGS TO FIXED CHARGES (unaudited)

																			Pro Forma
																Nine-Month			Nine-Month
																Period Ended			Period Ended
	Year Ended December 31,															September 30,			September 30,
	2008(1)			2007			2006			2005			2004			2009			2009
	(dollars in thousands)
Earnings:
(Loss) income before income taxes	$	(210,870	)	$	116,498		$	98,390		$	104,904		$	100,877		$	99,656		$	84,060
Fixed charges (excluding capitalized interest)		77,307			58,430			50,954			61,553			57,531			73,132			88,728
Amortization of capitalized interest		2,110			1,040			405			129			21			3,783			3,783
Total earnings	$	(131,453	)	$	175,968		$	149,749		$	166,586		$	158,429		$	176,571		$	176,571
Fixed charges:
Interest expense (including amortization of debt discount and issuance costs), net of capitalized interest	$	76,639		$	57,742		$	50,291		$	60,913		$	57,003		$	72,617		$	88,213
Capitalized interest		14,091			19,879			8,120			5,042			1,663			8,769			8,769
Estimated interest component of rent expense		668			688			663			640			528			515			515
Total fixed charges	$	91,398		$	78,309		$	59,074		$	66,595		$	59,194		$	81,901		$	97,497
Ratio of earnings to fixed charges		—			2.25	x		2.53	x		2.50	x		2.68	x		2.16	x		1.81	x

(1) For the year ended December 31, 2008, earnings were insufficient to cover fixed charges by $40,055.