Consolidated Condensed Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income / (Loss)	Accumulated Other Comprehensive Income / (Loss) Cumulative Effect, Period of Adoption, Adjustment
Balance (in shares) at Mar. 30, 2019			58,954
Beginning balance at Mar. 30, 2019	$ 1,140,240		$ 59	$ 1,363,677	$ (222,430)		$ (1,066)
Beginning balance (Accounting Standards Update 2016-02) at Mar. 30, 2019		$ (726)				$ (726)
Beginning balance (Accounting Standards Update 2018-02) at Mar. 30, 2019						$ 257		$ (257)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	80,828				80,828
Change in unrealized gain (loss) on marketable securities, net of tax	1,975						1,975
Change in foreign currency translation adjustments	(1,403)						(1,403)
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes (in shares)			279
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes	2,172			3,375	(1,203)
Repurchase and retirement of common stock (in shares)			(1,447)
Repurchase and retirement of common stock	(70,001)		$ (1)		(70,000)
Stock-based compensation	25,540			25,540
Balance (in shares) at Sep. 28, 2019			57,786
Ending balance at Sep. 28, 2019	1,178,625		$ 58	1,392,592	(213,274)		(751)
Balance (in shares) at Jun. 29, 2019			58,121
Beginning balance at Jun. 29, 2019	1,117,250		$ 58	1,375,719	(258,899)		372
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	76,210				76,210
Change in unrealized gain (loss) on marketable securities, net of tax	304						304
Change in foreign currency translation adjustments	(1,427)						(1,427)
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes (in shares)			224
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes	2,531			3,115	(584)
Repurchase and retirement of common stock (in shares)			(559)
Repurchase and retirement of common stock	(30,001)				(30,001)
Stock-based compensation	13,758			13,758
Balance (in shares) at Sep. 28, 2019			57,786
Ending balance at Sep. 28, 2019	1,178,625		$ 58	1,392,592	(213,274)		(751)
Balance (in shares) at Mar. 28, 2020			58,242
Beginning balance at Mar. 28, 2020	1,229,779		$ 58	1,434,871	(201,681)		(3,469)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	77,695				77,695
Change in unrealized gain (loss) on marketable securities, net of tax	6,917						6,917
Change in foreign currency translation adjustments	1,665						1,665
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes (in shares)			191
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes	$ 1,994			3,267	(1,273)
Repurchase and retirement of common stock (in shares)	(500)		(476)
Repurchase and retirement of common stock	$ (30,001)				(30,001)
Stock-based compensation	28,782			28,782
Balance (in shares) at Sep. 26, 2020			57,957
Ending balance at Sep. 26, 2020	1,316,831		$ 58	1,466,920	(155,260)		5,113
Balance (in shares) at Jun. 27, 2020			58,381
Beginning balance at Jun. 27, 2020	1,272,289		$ 58	1,451,239	(184,049)		5,041
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	59,486				59,486
Change in unrealized gain (loss) on marketable securities, net of tax	(579)						(579)
Change in foreign currency translation adjustments	651						651
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes (in shares)			52
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes	$ (491)			205	(696)
Repurchase and retirement of common stock (in shares)	(500)		(476)
Repurchase and retirement of common stock	$ (30,001)				(30,001)
Stock-based compensation	15,476			15,476
Balance (in shares) at Sep. 26, 2020			57,957
Ending balance at Sep. 26, 2020	$ 1,316,831		$ 58	$ 1,466,920	$ (155,260)		$ 5,113