Segment Reporting

3 Months Ended

Apr. 30, 2012

Notes To Financial Statements [Abstract]

Segment Reporting

Segment Reporting—Our Chief Operating Decision Makers (CODMs), which consist of the Chief Executive Officer and the President, review our consolidated results within one operating segment. In making operating decisions, our CODMs primarily consider consolidated financial information accompanied by disaggregated revenue information by geographic region.

We eliminate all intercompany revenues in computing revenues by geographic regions. Revenues related to operations in the geographic regions were:

Three months ended April 30,	2012		2011
Revenues:
North America	$	129,110	$	90,323
Europe	52,631		52,197
Japan	24,983		41,634
Pacific Rim	41,194		45,881
Total revenues	$	247,918	$	230,035

For the three months ended April 30, 2012, one customer accounted for 20% of our total revenues. For the three months ended April 30, 2011, one customer accounted for 21% of our total revenues.

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

Three months ended April 30,	2012		2011
Revenues:
IC Design to Silicon	$	103,189	$	86,288
Integrated System Design	55,676		51,609
Scalable Verification	56,310		58,742
New & Emerging Products	15,405		17,968
Services & Other	17,338		15,428
Total revenues	$	247,918	$	230,035

Certain reclassifications have been made between categories in the fiscal 2012 presentation to be consistent with the fiscal 2013 presentation.