Segment Reporting Total Property, Plant, and Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Jan. 31, 2012
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, net	$ 162,402	$ 148,019
UNITED STATES
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, net	121,179	106,852
Other North America [Member]
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, net	269	394
North America [Member]
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, net	121,448	107,246
Europe [Member]
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, net	33,029	32,866
JAPAN
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, net	979	1,336
Pacific Rim [Member]
Property, Plant and Equipment, Net [Abstract]
Property, plant, and equipment, net	$ 6,946	$ 6,571