Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 28, 2019	Dec. 29, 2018
Income Statement [Abstract]
Net sales	$ 177,019	$ 171,453	$ 541,618	$ 520,354
Cost of sales	106,308	103,326	329,099	316,669
Gross margin	70,711	68,127	212,519	203,685
Operating expenses:
Selling, general and administrative	30,719	29,142	91,580	88,043
Other, net	2,526	19,147	7,674	23,922
Total operating expenses	33,245	48,289	99,254	111,965
Operating income	37,466	19,838	113,265	91,720
Interest expense, net	466	1,197	1,486	4,354
Other non-operating expense	217	(386)	581	984
Income before income taxes	36,783	19,027	111,198	86,382
Provision for income taxes	6,268	2,849	18,914	12,626
Net income	$ 30,515	$ 16,178	$ 92,284	$ 73,756
Net income per common share:
Basic	$ 1.24	$ 0.66	$ 3.75	$ 3.03
Diluted	$ 1.22	$ 0.65	$ 3.71	$ 2.99
Weighted average common shares:
Basic	24,699,461	24,457,555	24,595,179	24,308,029
Diluted	24,981,480	24,800,647	24,898,635	24,693,015