Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified		3 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 Software License Agreement	Jun. 30, 2012 Supplier Purchase Commitment	Jun. 30, 2014 Supplier Purchase Commitment
Commitments and Contingencies Disclosure [Abstract]
Aggregate residual value at lease expiration for vehicle leases	$ 12,055
Guaranteed aggregate residual value at lease expiration for vehicle leases	9,799
Liability for the estimated end-of-term loss related to residual value guarantee	194
Long-term Purchase Commitment [Line Items]
Term of unrecorded unconditional purchase obligation		three year	three year
Minimum purchase obligation		1,198	2,102
Purchase Commitment, Remaining Minimum Amount Committed				$ 1,054