Segment Reporting Total Property, Plant, and Equipment, Net (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Property, plant, and equipment, net:
Property, plant, and equipment, net	$ 182,092	$ 170,737
United States
Property, plant, and equipment, net:
Property, plant, and equipment, net	133,432	127,631
Europe
Property, plant, and equipment, net:
Property, plant, and equipment, net	33,070	31,751
Japan
Property, plant, and equipment, net:
Property, plant, and equipment, net	2,220	882
Asia
Property, plant, and equipment, net:
Property, plant, and equipment, net	13,191	10,295
Americas
Property, plant, and equipment, net:
Property, plant, and equipment, net	$ 179	$ 178