Segment Reporting (Tables)

12 Months Ended

Jan. 31, 2017

Segment Reporting [Abstract]

Revenues related to operations in geographic regions

Revenues related to operations in the geographic areas were:

Fiscal year ended January 31,	2017		2016		2015
Revenues:
United States	$	477,520	$	488,148	$	542,229
Europe	287,371		254,827		255,943
Japan	119,756		87,119		87,725
Pacific Rim	385,189		335,833		341,474
Other	12,631		15,061		16,762
Total revenues	$	1,282,467	$	1,180,988	$	1,244,133

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,	2017		2016
Property, plant, and equipment, net:
United States	$	140,756	$	133,432
Europe	40,147		33,070
Japan	1,959		2,220
Pacific Rim	26,984		13,191
Other	834		179
Total property, plant and equipment, net	$	210,680	$	182,092