Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 118,768	$ 111,221
Accumulated depreciation	(84,294)	(78,974)
Property, plant and equipment, net	34,474	32,247
Depreciation	8,562	6,978	$ 6,187
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,379	2,396
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	32,532	31,367
Equipment and computer hardware and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 83,857	$ 77,458