Segment Reporting (Tables)

12 Months Ended

Jan. 31, 2012

Revenues Related to Operations in Geographic Regions

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

Year ended January 31,	2012		2011		2010
Revenues:
United States	$	397,801	$	386,265	$	320,244
Other North America		18,361		14,787		22,542
Total North America		416,162		401,052		342,786
Europe		247,079		223,156		205,512
Japan		116,469		124,298		120,344
Pacific Rim		234,928		166,247		134,085
Total revenues	$	1,014,638	$	914,753	$	802,727

Total Property, Plant, and Equipment, Net

As of January 31,	2012		2011
Property, plant, and equipment, net:
United States	$	106,852	$	112,657
Other North America		394		79
Total North America		107,246		112,736
Europe		32,866		20,718
Japan		1,336		1,610
Pacific Rim		6,571		4,276
Total property, plant and equipment, net	$	148,019	$	139,340

Revenue Information of Products and Services

We segregate revenue into five categories of similar products and services. Each category includes both product and related support revenues. Revenue information is as follows:

Year ended January 31,	2012		2011		2010
Revenues:
IC Design to Silicon	$	382,935	$	314,904	$	330,575
Integrated System Design		234,112		245,997		193,202
Scalable Verification		268,369		227,069		180,599
New & Emerging Products		74,104		64,693		48,863
Services & Other		55,118		62,090		49,488
Total revenues	$	1,014,638	$	914,753	$	802,727