Marketable Securities - Schedule of Unrealized Losses by Investment Category (Detail) - USD ($) $ in Thousands	Apr. 03, 2016	Mar. 29, 2015
Schedule of Available-for-sale Securities [Line Items]
Fair Value of Less Than 12 Months	$ 64,837	$ 50,123
Unrealized Losses of Less Than 12 Months	(117)	(73)
Fair Value of 12 Months or Greater	2,605	4,581
Unrealized Losses of 12 Months or Greater	(22)	(28)
Fair Value, Total	67,442	54,704
Unrealized Losses, Total	(139)	(101)
U.S. Government and Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value of Less Than 12 Months	23,221	16,607
Unrealized Losses of Less Than 12 Months	(15)	(12)
Fair Value, Total	23,221	16,607
Unrealized Losses, Total	(15)	(12)
Corporate Debt Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value of Less Than 12 Months	31,438	28,421
Unrealized Losses of Less Than 12 Months	(61)	(51)
Fair Value of 12 Months or Greater	741
Unrealized Losses of 12 Months or Greater	(8)
Fair Value, Total	32,179	28,421
Unrealized Losses, Total	(69)	(51)
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value of Less Than 12 Months	8,171	4,174
Unrealized Losses of Less Than 12 Months	(39)	(8)
Fair Value of 12 Months or Greater	1,864	4,581
Unrealized Losses of 12 Months or Greater	(14)	(28)
Fair Value, Total	10,035	8,755
Unrealized Losses, Total	(53)	(36)
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value of Less Than 12 Months	379	921
Unrealized Losses of Less Than 12 Months	(1)	(2)
Fair Value, Total	379	921
Unrealized Losses, Total	(1)	$ (2)
Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value of Less Than 12 Months	1,628
Unrealized Losses of Less Than 12 Months	(1)
Fair Value, Total	1,628
Unrealized Losses, Total	$ (1)