Marketable Securities - Schedule of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Apr. 03, 2016	Mar. 29, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	$ 228,770	$ 200,579
Available-for-sale securities, Gross Unrealized Gains	808	696
Available-for-sale securities, Gross Unrealized Losses	(139)	(101)
Available-for-sale securities, Estimated Fair Value	229,439	201,174
U.S. Government and Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	97,895	54,279
Available-for-sale securities, Gross Unrealized Gains	433	173
Available-for-sale securities, Gross Unrealized Losses	(15)	(12)
Available-for-sale securities, Estimated Fair Value	98,313	54,440
Corporate Debt Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	98,164	99,117
Available-for-sale securities, Gross Unrealized Gains	216	257
Available-for-sale securities, Gross Unrealized Losses	(69)	(51)
Available-for-sale securities, Estimated Fair Value	98,311	99,323
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	17,944	26,676
Available-for-sale securities, Gross Unrealized Gains	86	182
Available-for-sale securities, Gross Unrealized Losses	(53)	(36)
Available-for-sale securities, Estimated Fair Value	17,977	26,822
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	10,355	16,647
Available-for-sale securities, Gross Unrealized Gains	65	76
Available-for-sale securities, Gross Unrealized Losses	(1)	(2)
Available-for-sale securities, Estimated Fair Value	10,419	16,721
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	4,412	3,860
Available-for-sale securities, Gross Unrealized Gains	8	8
Available-for-sale securities, Gross Unrealized Losses	(1)
Available-for-sale securities, Estimated Fair Value	$ 4,419	$ 3,868

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

+ References

+ Details

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This item represents the cost of debt 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Amount of investments in debt securities classified as available-for-sale, expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26626-111562

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