Geographic and Segment Information (Notes)

12 Months Ended

Mar. 31, 2015

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

GEOGRAPHIC AND SEGMENT INFORMATION

The Company's reporting segments include semiconductor products and technology licensing.  The Company does not allocate operating expenses, interest income, interest expense, other income or expense, or provision for or benefit from income taxes to these segments for internal reporting purposes, as the Company does not believe that allocating these expenses is beneficial in evaluating segment performance.  Additionally, the Company does not allocate assets to segments for internal reporting purposes as it does not manage its segments by such metrics.

The following table represents revenues and gross profit for each segment (amounts in thousands):

	Years ended March 31,
	2015				2014				2013
	Net Sales		Gross Profit		Net Sales		Gross Profit		Net Sales		Gross Profit
Semiconductor products	$	2,057,443	$	1,139,971	$	1,836,639	$	1,034,165	$	1,497,820	$	754,656
Technology licensing	89,593		89,593		94,578		94,578		83,803		83,803
	$	2,147,036	$	1,229,564	$	1,931,217	$	1,128,743	$	1,581,623	$	838,459

The Company sells its products to distributors and original equipment manufacturers (OEMs) in a broad range of market segments, performs on-going credit evaluations of its customers and, as deemed necessary, may require collateral, primarily letters of credit.  The Company's operations outside the U.S. consist of product assembly and final test facilities in Thailand, and sales and support centers and design centers in certain foreign countries.  Domestic operations are responsible for the design, development and wafer fabrication of products, as well as the coordination of production planning and shipping to meet worldwide customer commitments.  The Company's Thailand assembly and test facility is reimbursed in relation to value added with respect to assembly and test operations and other functions performed, and certain foreign sales offices receive compensation for sales within their territory.  Accordingly, for financial statement purposes, it is not meaningful to segregate sales or operating profits for the assembly and test and foreign sales office operations.  Identifiable long-lived assets (consisting of property, plant and equipment net of accumulated amortization) by geographic area are as follows (amounts in thousands):

	March 31,
	2015		2014
United States	$	331,372	$	311,926
Thailand	197,981		179,139
Various other countries	52,219		40,902
Total long-lived assets	$	581,572	$	531,967

Sales to unaffiliated customers located outside the U.S., primarily in Asia and Europe, aggregated approximately 84% of consolidated net sales for each of fiscal 2015 and 2014 and approximately 83% of consolidated net sales for fiscal 2013.  Sales to customers in Europe represented approximately 21% of consolidated net sales for each of fiscal 2015 and 2014 and approximately 22% of consolidated net sales for fiscal 2013.  Sales to customers in Asia represented approximately 59%, 60% and 58% of consolidated net sales for fiscal 2015, 2014 and 2013, respectively.  Within Asia, sales into China, including Hong Kong, represented approximately 28%, 29% and 27% of consolidated net sales for fiscal 2015, 2014 and 2013, respectively. Sales into Taiwan represented approximately 14% of consolidated net sales for fiscal 2015 and approximately 13% of consolidated net sales for each of fiscal 2014 and 2013.  Sales into any other individual foreign country did not exceed 10% of the Company's net sales for any of the years presented.

No single end customer or distributor accounted for 10% or more of the Company's net sales during fiscal 2015, 2014 or 2013.