Note 6. Cash, Cash Equivalents and Short Term Marketable Securities (Detail) - Amortized Cost and Estimated Fair Value of Cash Equivalents and Marketable Securities (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Apr. 01, 2012
Less than 1 year	$ 61,011	$ 48,978
Less than 1 year	61,029	49,011
Due in 1 to 5 years	134,289	141,124
Due in 1 to 5 years	134,600	141,745
Total	195,300	190,102
Total	$ 195,629	$ 190,756

Note 6. Cash, Cash Equivalents and Short Term Marketable Securities (Detail) - Amortized Cost and Estimated Fair Value of Cash Equivalents and Marketable Securities (USD $)
In Thousands, unless otherwise specified

Mar. 31, 2013

Apr. 01, 2012

$ 61,011

$ 48,978

Less than 1 year

61,029

49,011

Due in 1 to 5 years

134,289

141,124

Due in 1 to 5 years

134,600

141,745

Total

195,300

190,102

Total

$ 195,629

$ 190,756

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References+ Details

- Definition

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

+ References+ Details

- Definition

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the next fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

+ References+ Details

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References+ Details