Consolidated Condensed Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Consolidated Condensed Statements of Income [Abstract]
Net sales	$ 306,756	$ 210,214	$ 589,389	$ 362,779
Cost of sales	164,535	109,647	314,714	186,837
Gross profit	142,221	100,567	274,675	175,942
Operating expenses:
Research and development	67,258	44,557	133,093	84,334
Selling, general and administrative	30,103	21,545	59,222	41,228
Acquisition related costs		14,937		14,937
Restructuring and other, net		1,455		1,455
Patent agreement and other	752		(11,748)
Total operating expenses	98,113	82,494	180,567	141,954
Income from operations	44,108	18,073	94,108	33,988
Interest income	215	136	469	331
Interest expense	(816)	(2,806)	(1,708)	(3,468)
Other income	(524)	(11,994)	(388)	(11,493)
Income before income taxes	42,983	3,409	92,481	19,358
Provision for income taxes	8,103	2,557	24,247	8,258
Net income	$ 34,880	$ 852	$ 68,234	$ 11,100
Basic earnings per share	$ 0.55	$ 0.01	$ 1.08	$ 0.18
Diluted earnings per share	$ 0.53	$ 0.01	$ 1.03	$ 0.17
Basic weighted average common shares outstanding	63,346	62,241	63,310	62,137
Diluted weighted average common shares outstanding	66,329	65,085	66,378	64,892