Earnings Per Share (Details 2) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Restricted Stock Retention Awards Issued			325
EPS calculation
Stock Issued During Period, Shares, Restricted Stock Award, Gross			2,185	1,315
Restricted Stock Included In Weighted-Average Shares Outstanding	2,185	1,315	1,684	1,082
Common stock issued through Equity Units transactions (in shares)				1,830
Weighted Average Shares Outstanding, Common Stock Issued Through Equity Units		1,830		1,231
Antidilutive shares due to net loss for the period | EPS calculation
Number of antidilutive shares excluded from EPS calculation	5,733		5,863
Stock options | EPS calculation
Number of antidilutive shares excluded from EPS calculation		5,760		7,563
2.5% Convertible Senior Notes
Debt Instrument, Interest Rate, Stated Percentage		2.50%		2.50%