Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017
Income Statement [Abstract]
Net sales	$ 171,453	$ 166,858	$ 520,354	$ 495,072
Cost of sales	103,326	102,086	316,669	306,366
Gross margin	68,127	64,772	203,685	188,706
Operating expenses:
Selling, general and administrative	29,142	28,162	88,043	83,535
Other, net	19,147	3,328	23,922	14,493
Total operating expenses	48,289	31,490	111,965	98,028
Operating income	19,838	33,282	91,720	90,678
Interest expense, net	1,197	1,761	4,354	5,704
Other non-operating expense	(386)	185	984	939
Income before income taxes	19,027	31,336	86,382	84,035
Provision for income taxes	2,849	7,504	12,626	23,571
Net income	$ 16,178	$ 23,832	$ 73,756	$ 60,464
Net income per common share:
Basic (in dollars per share)	$ 0.66	$ 0.99	$ 3.03	$ 2.53
Diluted (in dollars per share)	$ 0.65	$ 0.97	$ 2.99	$ 2.49
Weighted average common shares:
Basic (in shares)	24,457,555	23,985,925	24,308,029	23,912,474
Diluted (in shares)	24,800,647	24,446,115	24,693,015	24,322,165