Exhibit 12

Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends

	Year Ended September 30,										Six Months Ended March 31
(in thousands)	2003		2004		2005		2006		2007		2008
Fixed Charges Computation
Interest expensed and capitalized (1)	$	12,060	$	13,857	$	49,043	$	35,119	$	29,671	$	12,046
Amortized premiums, discounts, and capitalized expenses related to indebtedness		3,857		6,031		10,634		2,843		5,318		1,332
Reasonable approximation of interest within rental expense		1,139		1,462		2,433		3,092		3,440		1,722
Total Fixed Charges and Preferred Equity Dividends	$	17,056	$	21,350	$	62,110	$	41,054	$	38,429	$	15,100
Earnings Computation
Pre-tax income from continuing operations before adjustment for minority interests in consolidated subsidiaries or income or loss from equity investees	$	60,081	$	105,107	$	163,808	$	137,816	$	59,236	$	10,465
Plus
Fixed charges		17,056		21,350		62,110		41,054		38,429		15,100
Minus
Interest capitalized		230		435		464		1,027		784		369
Total Earnings	$	76,907	$	126,022	$	225,454	$	177,843	$	96,881	$	25,196
Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends		4.51		5.90		3.63		4.33		2.52		1.67

(1) Interest expense associated with unrecognized tax benefits is included in income tax expense, not with interest expense.