Segment Reporting Total Property, Plant, and Equipment, Net (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Property, plant, and equipment, net:
Property, plant, and equipment, net	$ 210,680	$ 182,092
United States
Property, plant, and equipment, net:
Property, plant, and equipment, net	140,756	133,432
Europe
Property, plant, and equipment, net:
Property, plant, and equipment, net	40,147	33,070
Japan
Property, plant, and equipment, net:
Property, plant, and equipment, net	1,959	2,220
Asia
Property, plant, and equipment, net:
Property, plant, and equipment, net	26,984	13,191
Americas
Property, plant, and equipment, net:
Property, plant, and equipment, net	$ 834	$ 179