Total Property, Plant, and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2012	Jan. 31, 2011
Property, plant, and equipment, net:
Total property, plant, and equipment, net	$ 148,019	$ 139,340
United States
Property, plant, and equipment, net:
Total property, plant, and equipment, net	106,852	112,657
Other North America
Property, plant, and equipment, net:
Total property, plant, and equipment, net	394	79
North America
Property, plant, and equipment, net:
Total property, plant, and equipment, net	107,246	112,736
Europe
Property, plant, and equipment, net:
Total property, plant, and equipment, net	32,866	20,718
Japan
Property, plant, and equipment, net:
Total property, plant, and equipment, net	1,336	1,610
Pacific Rim
Property, plant, and equipment, net:
Total property, plant, and equipment, net	$ 6,571	$ 4,276