CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Income Statement [Abstract]
Net revenues	$ 225,377	$ 220,253	$ 436,328	$ 430,209
Cost of goods sold	120,815	116,005	240,101	234,905
Gross profit	104,562	104,248	196,227	195,304
Operating expenses:
Research and development	7,521	8,336	15,714	19,773
Selling, general and administrative	72,783	71,118	139,644	158,618
Total operating expenses	80,304	79,454	155,358	178,391
Operating income	24,258	24,794	40,869	16,913
Gain on divestiture	0	0	8,000	0
Interest and other expense, net	(1,397)	(1,962)	(2,756)	(4,139)
Income before provision for income taxes	22,861	22,832	46,113	12,774
Provision for income taxes	2,759	3,007	5,874	3,295
Net income	$ 20,102	$ 19,825	$ 40,239	$ 9,479
Net earnings per share - basic (in dollars per share)	$ 0.38	$ 0.39	$ 0.77	$ 0.19
Net earnings per share - diluted (in dollars per share)	$ 0.38	$ 0.38	$ 0.76	$ 0.18
Weighted average shares outstanding
Basic (in shares)	52,619	51,378	52,531	51,200
Diluted (in shares)	52,981	51,701	52,896	51,463
Comprehensive income	$ 21,937	$ 19,037	$ 45,703	$ 7,804