Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 26, 2020	Dec. 28, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 114,368	$ 68,512	$ 192,063	$ 149,340
Other comprehensive income (loss), before tax
Foreign currency translation gain (loss)	428	883	2,093	(520)
Unrealized gain (loss) on marketable securities	(649)	(37)	8,106	2,463
Cumulative effect of adoption of ASU 2018-02	0	0	0	(257)
(Provision) benefit for income taxes	136	8	(1,702)	(517)
Comprehensive income	$ 114,283	$ 69,366	$ 200,560	$ 150,509
Accounting Standards Update [Extensible List]				us-gaap:AccountingStandardsUpdate201802Member