Consolidated Condensed Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 27, 2015	Jun. 28, 2014
Consolidated Condensed Statements of Income [Abstract]
Net sales	$ 282,633	$ 152,565
Cost of sales	150,179	77,190
Gross profit	132,454	75,375
Operating expenses:
Research and development	65,835	39,777
Selling, general and administrative	29,119	19,683
Patent agreement, net	(12,500)
Total operating expenses	82,454	59,460
Income from operations	50,000	15,915
Interest income	254	195
Interest expense	(892)	(662)
Other income	136	501
Income before income taxes	49,498	15,949
Provision for income taxes	16,144	5,701
Net income	$ 33,354	$ 10,248
Basic earnings per share	$ 0.53	$ 0.17
Diluted earnings per share	$ 0.50	$ 0.16
Basic weighted average common shares outstanding	63,274	62,032
Diluted weighted average common shares outstanding	66,410	64,688