Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 28, 2020	Mar. 30, 2019	Mar. 31, 2018
Quarterly Financial Information (Unaudited)
Net sales	$ 188,628	$ 283,997	$ 187,183	$ 185,767	$ 192,755	$ 254,006	$ 168,109	$ 161,984	$ 845,575	$ 776,854	$ 677,949
Gross profit	57,961	97,036	59,338	62,156	63,406	85,663	50,918	51,447	276,491	251,434	207,915
Income (loss) from operations	9,696	34,977	12,934	16,061	16,499	29,297	8,697	9,829	73,668	64,322	46,255
Net income/(loss)	$ 5,729	$ 24,819	$ 7,680	$ 9,721	$ 8,697	$ 19,030	$ 4,534	$ 6,761	$ 47,949	$ 39,022	$ 28,879
Earnings/(loss) per share:
Basic shares (in dollars per share)	$ 0.20	$ 0.87	$ 0.27	$ 0.34	$ 0.31	$ 0.67	$ 0.16	$ 0.24	$ 1.68	$ 1.39	$ 1.08
Diluted shares (in dollars per share)	$ 0.20	$ 0.85	$ 0.26	$ 0.33	$ 0.30	$ 0.66	$ 0.16	$ 0.24	$ 1.64	$ 1.35	$ 1.05
Weighted average shares outstanding:
Basic shares	28,786	28,665	28,502	28,380	28,327	28,320	28,119	27,604	28,583	28,092	26,744
Diluted shares	29,310	29,367	29,161	29,025	28,922	28,886	28,875	28,542	29,220	28,813	27,528