Segment Reporting (Tables)

12 Months Ended

Jan. 31, 2016

Segment Reporting [Abstract]

Revenues related to operations in geographic regions

Revenues related to operations in the geographic areas were:

Year ended January 31,	2016		2015		2014
Revenues:
United States	$	488,148	$	542,229	$	497,954
Europe	254,827		255,943		241,417
Japan	87,119		87,725		113,796
Pacific Rim	335,833		341,474		287,956
Other	15,061		16,762		15,250
Total revenues	$	1,180,988	$	1,244,133	$	1,156,373

Total property, plant, and equipment, net in geographic regions

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

As of January 31,	2016		2015
Property, plant, and equipment, net:
United States	$	133,432	$	127,631
Europe	33,070		31,751
Japan	2,220		882
Pacific Rim	13,191		10,295
Other	179		178
Total property, plant and equipment, net	$	182,092	$	170,737