Exhibit 12

Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends

(in thousands)	Year Ended September 30,										Quarter Ended December 31
	2002		2003		2004		2005		2006		2006
Fixed Charges Computation
Interest expensed and capitalized	$	417	$	12,060	$	13,857	$	49,043	$	35,119	$	8,819
Amortized premiums, discounts, and capitalized expenses related to indebtedness	136		3,857		6,031		10,634		2,843		619
Reasonable approximation of interest within rental expense	72		1,139		1,462		2,433		3,092		806
Total Fixed Charges and Preferred Equity Dividends	$	625	$	17,056	$	21,350	$	62,110	$	41,054	$	10,244
Earnings Computation
Pre-tax income from continuing operations before adjustment for minority interests in consolidated subsidiaries or income or loss from equity investees	$	40,236	$	60,081	$	105,107	$	163,808	$	137,816	$	23,888
Plus
Fixed charges	625		17,056		21,350		62,110		41,054		10,244
Minus
Interest capitalized	—		230		435		464		1,027		266
Total Earnings	$	40,861	$	76,907	$	126,022	$	225,454	$	177,843	$	33,866
Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends	65.38		4.51		5.90		3.63		4.33		3.31