Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Income Statement [Abstract]
Sales	$ 140,043	$ 145,324	$ 287,379	$ 295,124
Cost of sales	(112,049)	(119,552)	(230,588)	(240,895)
Gross profit	27,994	25,772	56,791	54,229
Selling, general and administrative expenses	(14,817)	(14,941)	(29,653)	(29,920)
Operating income	13,177	10,831	27,138	24,309
Interest expense, net	(666)	(811)	(1,429)	(1,745)
Other income	26	78	143	76
Income before income taxes	12,537	10,098	25,852	22,640
Income tax expense	(3,287)	(2,689)	(6,795)	(6,108)
Net income	$ 9,250	$ 7,409	$ 19,057	$ 16,532
Weighted average number of shares outstanding - basic	10,575,538	10,675,833	10,589,922	10,662,210
Weighted average number of shares outstanding - diluted	10,633,117	10,719,059	10,663,864	10,714,381
Basic earnings per share
Basic earnings per share	$ 0.87	$ 0.69	$ 1.80	$ 1.55
Diluted earnings per share
Diluted earnings per share	0.87	0.69	1.79	1.54
Cash dividends declared per common share	$ 0.23	$ 0.225	$ 0.46	$ 0.225