Segment Reporting Total Property, Plant, and Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2014	Jan. 31, 2013
Property, plant, and equipment, net:
Property, plant, and equipment, net	$ 160,165	$ 162,402
United States
Property, plant, and equipment, net:
Property, plant, and equipment, net	116,954	121,179
Other North America
Property, plant, and equipment, net:
Property, plant, and equipment, net	141	269
North America
Property, plant, and equipment, net:
Property, plant, and equipment, net	117,095	121,448
Europe
Property, plant, and equipment, net:
Property, plant, and equipment, net	34,800	33,029
Japan
Property, plant, and equipment, net:
Property, plant, and equipment, net	637	979
Asia
Property, plant, and equipment, net:
Property, plant, and equipment, net	$ 7,633	$ 6,946