Employee Retirement Plan - Additional Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Vesting period, in years	3 years
Discretionary plan contribution	$ 0	$ 0.2	$ 0.3
Years One Through Three
Defined Benefit Plan Disclosure [Line Items]
Annual vesting percentage	33.00%
Years Four and Thereafter
Defined Benefit Plan Disclosure [Line Items]
Annual vesting percentage	100.00%
Minimum
Defined Benefit Plan Disclosure [Line Items]
Maximum annual contribution per employee	1.00%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Maximum annual contribution per employee	50.00%