Geographic Sales and Significant Customers

Operating segments are defined as components of an enterprise for which separate financial information is available and evaluated regularly by the chief operating decision-maker, or decision-making group, in deciding how to allocate resources and in assessing performance. The Company does business in four main geographic regions: the Americas (primarily the United States); Europe, the Middle East, and Africa (EMEA); Japan; and the Asia Pacific region (APAC). The Company’s chief operating decision-making group reviews financial information presented on a consolidated basis accompanied by information about revenues by geographic region. The Company’s foreign offices conduct sales, marketing and support activities. Revenues are attributed by geographic location based on the location of the customer. The Company’s assets are primarily located in the United States. Therefore, geographic information is presented only for net revenue.

The following presents revenues by geographic region (in thousands):



	Years Ended September 30,
	2013		2012		2011
Americas:
United States	$	777,516	$	729,238	$	627,806
Other	74,391		64,144		49,062
Total Americas	851,907		793,382		676,868
EMEA	327,109		294,191		240,453
Japan	83,051		90,521		74,824
Asia Pacific	219,247		199,153		159,689
	$	1,481,314	$	1,377,247	$	1,151,834

One worldwide distributor of the Company’s products accounted for 16.6%, 17.1%, and 18.1% of total net revenues in fiscal years 2013, 2012, and 2011, respectively. Another worldwide distributor of the Company’s products accounted for 15.7%, 13.8% and 10.7% of total net revenues in fiscal years 2013, 2012 and 2011, respectively. Another worldwide distributor of the Company’s products accounted for 11.8% of total net revenue in fiscal year 2013. One worldwide distributor accounted for 18.6% of the Company’s accounts receivable as of September 30, 2013. Two worldwide distributors accounted for 13.4% and 12.0% of the Company’s accounts receivable as of September 30, 2012. No other distributors accounted for more than 10% of total net revenue or receivables.