Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Income Statement [Abstract]
Sales	$ 125,395	$ 121,250	$ 259,126	$ 252,624
Cost of sales	(101,280)	(94,218)	(209,012)	(197,376)
Gross profit	24,115	27,032	50,114	55,248
Selling, general and administrative expenses	(14,828)	(14,871)	(30,594)	(29,997)
Operating income	9,287	12,161	19,520	25,251
Interest expense, net	(816)	(619)	(1,566)	(1,343)
Income before income taxes	8,471	11,542	17,954	23,908
Income tax provision	(3,261)	(4,352)	(6,913)	(9,114)
Net income	$ 5,210	$ 7,190	$ 11,041	$ 14,794
Weighted average number of shares outstanding - basic	10,605,629	10,536,309	10,594,309	10,524,724
Weighted average number of shares outstanding - diluted	10,650,585	10,586,939	10,641,731	10,581,253
Basic earnings per share
Basic earnings per share	$ 0.49	$ 0.68	$ 1.04	$ 1.41
Diluted earnings per share
Diluted earnings per share	0.49	0.68	1.04	1.40
Cash dividends declared per common share	$ 0.44	$ 0.42	$ 0.44	$ 0.42