Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 23, 2017	Sep. 24, 2016	Sep. 23, 2017	Sep. 24, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 73,300	$ 86,039	$ 116,212	$ 104,110
Other comprehensive income (loss), before tax
Foreign currency translation	3,021	65	3,311	253
Unrealized gain (loss) on marketable securities	14	(76)	48	(9)
Actuarial gain on pension plan	0	0	792	0
Reclassification of actuarial gain to net income	0	(26)	0	(53)
(Provision) benefit for income taxes	(1)	21	(151)	20
Comprehensive income	$ 76,334	$ 86,023	$ 120,212	$ 104,321