Loss Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net Income (Loss) Attributable to Parent	$ (15,443)	$ 68,215	$ (135,816)	$ 59,435
Weighted Average Number of Shares Outstanding, Basic	77,344	77,738	77,234	77,628
Incremental Common Shares Attributable to Conversion of Debt Securities	0	3,697	0	3,697
Weighted Average Number Diluted Shares Outstanding Adjustment	0	3,872	0	4,570
Weighted Average Number of Shares Outstanding, Diluted	77,344	81,610	77,234	82,198
Earnings Per Share, Basic	$ (0.20)	$ 0.88	$ (1.76)	$ 0.77
Earnings Per Share, Diluted	$ (0.20)	$ 0.84	$ (1.76)	$ 0.72
Antidilutive securities excluded from computation of earnings per share
Total shares excluded		3,000	8,408	3,000
Shares associated with convertible debt (assumed conversion) [Member]
Antidilutive securities excluded from computation of earnings per share
Total shares excluded			3,697
Employee stock options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Incremental Common Shares Attributable to Share-based Payment Arrangements	0	0	0	380
Antidilutive securities excluded from computation of earnings per share
Total shares excluded			2,872
Restricted stock awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Incremental Common Shares Attributable to Share-based Payment Arrangements	0	175	0	493
Antidilutive securities excluded from computation of earnings per share
Total shares excluded			1,839