Revenue from Contracts with Customers Revenue, Initial Application Period Cumulative Effect Transition (Details) - USD ($) $ 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
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue	$ 255,335	$ 273,722	$ 268,675	$ 264,042	$ 241,113	$ 233,700	$ 241,530	$ 246,403	$ 1,061,774	$ 962,746	$ 871,235
Cost of sales									831,256	757,040	690,555
Gross profit	51,898	59,855	58,467	60,298	55,793	49,021	49,416	51,476	230,518	205,706	180,680
Selling, general and administrative expenses									145,611	121,568	106,907
Income from operations									84,907	84,138	73,773
Income before income taxes									92,979	86,676	78,523
Income tax expense									(17,913)	(18,054)	(17,021)
Net income	$ 12,001	$ 20,898	$ 20,885	$ 21,282	$ 19,971	$ 13,384	$ 15,576	$ 19,691	75,066	68,622	$ 61,502
ASC 606 Adjustment | ASC 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue									(28,897)	(32,420)
Cost of sales									(29,159)	(31,047)
Gross profit									262	(1,373)
Selling, general and administrative expenses									65	(289)
Income from operations									197	(1,084)
Income before income taxes									197	(1,084)
Income tax expense									(69)	250
Net income									128	(834)
Balance without ASC 606 Adoption | ASC 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net revenue									1,032,877	930,326
Cost of sales									802,097	725,993
Gross profit									230,780	204,333
Selling, general and administrative expenses									145,676	121,279
Income from operations									85,104	83,054
Income before income taxes									93,176	85,592
Income tax expense									(17,982)	(17,804)
Net income									$ 75,194	$ 67,788