Segment Reporting (Tables)

12 Months Ended

Jan. 31, 2015

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,	2015		2014		2013
Revenues:
United States	$	542,229	$	497,954	$	467,595
Europe	255,943		241,417		261,371
Japan	87,725		113,796		127,789
Pacific Rim	341,474		287,956		218,428
Other	16,762		15,250		13,544
Total revenues	$	1,244,133	$	1,156,373	$	1,088,727

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

As of January 31,	2015		2014
Property, plant, and equipment, net:
United States	$	127,631	$	116,954
Europe	31,751		34,800
Japan	882		637
Pacific Rim	10,295		7,633
Other	178		141
Total property, plant and equipment, net	$	170,737	$	160,165