Long-Term Debt and Equity Units (Tables)

9 Months Ended

Dec. 31, 2011

Long-term Debt Disclosure [Abstract]

Schedule of accreted value of long-term debt

	December 31, 2011						March 31, 2011
	Current Accreted Value		Unamortized Discount		Maturity Amount		Accreted Value
2.5% convertible senior notes	$	1,116,955	$	133,045	$	1,250,000	$	1,087,932
5.6% senior notes from Equity Units	—		—		—		103,039
Other term loans	10,086		—		10,086		10,897
Subtotal	1,127,041		133,045		1,260,086		1,201,868
Less: current portion	1,266		—		1,266		792
Total	$	1,125,775	$	133,045	$	1,258,820	$	1,201,076

Schedule of aggregate maturities of long-term debt based on contractual terms

Remaining 2012	$	203
2013	1,281
2014	1,333
2015	1,251,386
2016	5,883
Thereafter	—
Total	$	1,260,086