Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Future minimum annual rentals under non-cancelable operating leases
2015	$ 17,022,000
2016	13,950,000
2017	10,454,000
2018	8,543,000
2019	7,172,000
Thereafter	20,808,000
Total	77,949,000
Rent expense	$ 14,700,000	$ 25,300,000	$ 25,100,000