Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Mar. 27, 2021	Mar. 28, 2020	Mar. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 217,344	$ 159,498	$ 89,991
Other comprehensive income (loss), before tax
Foreign currency translation gain (loss)	1,862	68	(3,125)
Unrealized gain (loss) on marketable securities	5,673	(2,803)	2,823
U.K. pension settlement	0	0	13,814
Cumulative effect of adoption of ASU 2018-02	0	(257)	0
Benefit (provision) for income taxes	(1,191)	589	(3,217)
Comprehensive income	$ 223,688	$ 157,095	$ 100,286