Segment Reporting (Tables)

12 Months Ended

Jan. 31, 2014

Segment Reporting [Abstract]

Revenues Related to Operations in Geographic Regions

Revenues and property, plant and equipment, net, related to operations in the geographic areas were:

Year ended January 31,	2014		2013		2012
Revenues:
United States	$	497,954	$	467,595	$	397,801
Other North America	15,250		13,544		18,361
Total North America	513,204		481,139		416,162
Europe	241,417		261,371		247,079
Japan	113,796		127,789		116,469
Pacific Rim	287,956		218,428		234,928
Total revenues	$	1,156,373	$	1,088,727	$	1,014,638

Total Property, Plant, and Equipment, Net in Geographic Regions

As of January 31,	2014		2013
Property, plant, and equipment, net:
United States	$	116,954	$	121,179
Other North America	141		269
Total North America	117,095		121,448
Europe	34,800		33,029
Japan	637		979
Pacific Rim	7,633		6,946
Total property, plant and equipment, net	$	160,165	$	162,402