Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Dec. 30, 2018	Dec. 31, 2017
Income Statement [Abstract]
Sales	$ 128,151	$ 118,053	$ 423,275	$ 377,179
Cost of sales	(107,118)	(99,213)	(348,013)	(308,225)
Gross profit	21,033	18,840	75,262	68,954
Selling, general and administrative expenses	(14,312)	(14,139)	(44,232)	(44,733)
Operating income	6,721	4,701	31,030	24,221
Interest expense, net	(807)	(912)	(2,552)	(2,522)
Other (expense) income	(316)	55	(240)	99
Income before income taxes	5,598	3,844	28,238	21,798
Income tax (expense) benefit	(1,468)	13,299	(7,576)	6,386
Net income	$ 4,130	$ 17,143	$ 20,662	$ 28,184
Weighted average number of shares outstanding - basic	10,667,001	10,609,078	10,663,807	10,599,232
Weighted average number of shares outstanding - diluted	10,712,027	10,648,232	10,727,377	10,641,578
Basic earnings per share
Basic earnings per share	$ 0.39	$ 1.62	$ 1.94	$ 2.66
Diluted earnings per share
Diluted earnings per share	0.39	1.61	1.93	2.65
Cash dividends declared per common share	$ 0.225	$ 0	$ 0.45	$ 0.44