Consolidated Condensed Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 30, 2017	Dec. 24, 2016	Dec. 30, 2017	Dec. 24, 2016
Income Statement [Abstract]
Net sales	$ 482,741	$ 523,029	$ 1,229,013	$ 1,211,076
Cost of sales	247,653	267,877	620,927	617,540
Gross profit	235,088	255,152	608,086	593,536
Operating expenses
Research and development	96,978	76,079	270,888	225,686
Selling, general and administrative	34,604	32,884	95,504	95,513
Total operating expenses	131,582	108,963	366,392	321,199
Income from operations	103,506	146,189	241,694	272,337
Interest income	1,191	415	3,125	978
Interest expense	(279)	(765)	(894)	(3,020)
Other income (expense)	322	(47)	(813)	(161)
Income before income taxes	104,740	145,792	243,112	270,134
Provision for income taxes	70,961	23,751	93,121	43,983
Net income	$ 33,779	$ 122,041	$ 149,991	$ 226,151
Basic earnings per share (in dollars per share)	$ 0.53	$ 1.91	$ 2.36	$ 3.59
Diluted earnings per share (in dollars per share)	$ 0.52	$ 1.83	$ 2.26	$ 3.41
Basic weighted average common shares outstanding (in shares)	63,453	63,837	63,655	63,025
Diluted weighted average common shares outstanding (in shares)	65,557	66,748	66,377	66,378