Property, Plant, and Equipment (Narratives) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Property, Plant and Equipment, Net [Abstract]
Assets recorded under capital leases	$ 4,838	$ 4,779
Machinery, equipment, and leasehold improvements assets recorded under capital leases	737	6,260
Accumulated amortization of assets recorded under capital leases	4,379	9,027
Depreciation expense	12,296	11,399	10,134
Capitalized software costs	22,892	20,972
Accumulated amortization on capitalized software costs	6,276	5,343
Depreciation expense on capitalized software costs	$ 1,514	$ 932	$ 499