Property, Plant, and Equipment (Narratives) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Property, Plant and Equipment, Net [Abstract]
Assets recorded under capital leases	$ 4,838
Machinery, equipment, and leasehold improvements assets recorded under capital leases	1,017	$ 694
Accumulated amortization of assets recorded under capital leases	3,953	3,673
Depreciation expense	15,507	12,296	$ 11,399
Capitalized software costs	34,386	29,470
Accumulated amortization on capitalized software costs	14,792	10,732
Depreciation expense on capitalized software costs	$ 2,085	$ 1,514	$ 932