CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net revenues	$ 241,581	$ 225,377	$ 470,928	$ 436,328
Cost of goods sold	129,674	120,815	275,777	240,101
Gross profit	111,907	104,562	195,151	196,227
Operating expenses:
Research and development	8,583	7,521	17,989	15,714
Selling, general and administrative	77,248	72,783	145,793	139,644
Total operating expenses	85,831	80,304	163,782	155,358
Operating income	26,076	24,258	31,369	40,869
Gain on divestiture	0	0	0	8,000
Interest and other expense, net	(3,039)	(1,397)	(5,017)	(2,756)
Income before provision for income taxes	23,037	22,861	26,352	46,113
Provision for income taxes	4,311	2,759	10,445	5,874
Net income	$ 18,726	$ 20,102	$ 15,907	$ 40,239
Net income per share - basic (in dollars per share)	$ 0.36	$ 0.38	$ 0.31	$ 0.77
Net income per share - diluted (in dollars per share)	$ 0.35	$ 0.38	$ 0.30	$ 0.76
Weighted average shares outstanding
Basic (in shares)	51,605	52,619	51,862	52,531
Diluted (in shares)	53,138	52,981	53,365	52,896
Comprehensive income	$ 18,403	$ 21,937	$ 10,865	$ 45,703