Share Based Awards (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Summary of Stock Option Activity
Number of Shares Outstanding Beginning Balance	1,159,183	988,337	1,397,556
Weighted Average Exercise Price Outstanding Beginning Balance	$ 30.54	$ 32.09	$ 22.20
Weighted Average Remaining Contractual Life Outstanding Beginning Balance	5 years 9 months 18 days	5 years 6 months
Number of Share Granted	469,000	556,500	459,400
Weighted Average Exercise Price Granted	$ 18.78	$ 27.78	$ 43.04
Weighted Average Remaining Contractual Life Granted	7 years 2 months 12 days
Number of Shares Exercised	(111,272)	(56,366)	(697,157)
Weighted Average Exercise Price Exercised	$ 19.78	$ 16.81	$ 18.34
Weighted Average Remaining Contractual Life Exercised	9 months 18 days
Aggregate Intrinsic Value, Exercised	$ 264	$ 82	$ 17,698
Number of Shares Forfeited/Canceled	(146,810)	(329,288)	(171,462)
Weighted Average Exercise Price Forfeited/Canceled	$ 30.28	$ 31.42	$ 36.66
Weighted Average Remaining Contractual Life Forfeited/Canceled	5 years 2 months 12 days
Number of Shares Outstanding Ending Balance	1,370,101	1,159,183	988,337
Weighted Average Exercise Price Outstanding Ending Balance	$ 27.85	$ 30.54	$ 32.09
Weighted Average Remaining Contractual Life Outstanding Ending Balance	5 years 9 months 18 days	5 years 6 months
Aggregate Intrinsic Value Outstanding Ending Balance	0
Number of Shares Vested and expected to vest	1,285,319
Weighted Average Exercise Price Vested and expected to vest	$ 27.96
Weighted Average Remaining Contractual Life Vested and expected to vest	5 years 9 months 18 days
Aggregate Intrinsic Value Vested and expected to vest	0
Number of Shares Exercisable	378,541
Weighted Average Exercise Price Exercisable	$ 31.97
Weighted Average Remaining Contractual Life Exercisable	4 years 3 months 18 days
Aggregate Intrinsic Value Exercisable	$ 0