Exhibit 12.1

	Nine Months Ended December 31			Fiscal Year Ended March 31,
	2011			2011			2010			2009			2008			2007
Earnings (1):
Earnings before income taxes		9,267			16,762			39,297			62,183			144,384			304,288
Add: Fixed charges		13,463			18,291			18,480			24,714			20,866			12,050
Add: Amortization of capitalized interest and FIN 48 Interest		402			(932	)		3,857			5,358			6,597			30
Add: Cash distributions from equity method investments		17,250			24,500			29,750			33,000			37,750			29,000
Subtract: Income from equity method investments		(21,160	)		(24,233	)		(24,157	)		(32,426	)		(33,982	)		(32,765	)
Total Earnings		19,222			34,388			67,227			92,829			175,615			312,603
Fixed Charges (2):
Interest expense		13,352			17,995			18,180			24,433			20,530			11,709
Interest component of rent expense		111			296			300			281			336			341
Total Fixed Charges		13,463			18,291			18,480			24,714			20,866			12,050
Ratio of Earnings to Fixed Charges		1.4x			1.9x			3.6x			3.8x			8.4x			25.9x

(1) Earnings represent earnings before income taxes and before income from equity method investments plus: (a) fixed charges; and (b) cash distributions from equity method investments.

(2) Fixed charges include: (a) interest expense, whether expensed or capitalized, less interest accrued for uncertain tax positions; and (b) the portion of operating rental expense which management believes is representative of the interest component of rent expense.