Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jun. 28, 2020	Jun. 30, 2019
Income Statement [Abstract]
Sales	$ 143,172	$ 147,336
Cost of sales	(112,196)	(118,539)
Gross profit	30,976	28,797
Selling, general and administrative expenses	(15,038)	(14,836)
Operating income	15,938	13,961
Interest expense, net	(380)	(763)
Other income	477	117
Income before income taxes	16,035	13,315
Income tax expense	(4,247)	(3,508)
Net income	$ 11,788	$ 9,807
Weighted average number of shares outstanding - basic	10,515,728	10,604,306
Weighted average number of shares outstanding - diluted	10,642,673	10,665,709
Basic earnings per share
Basic earnings per share	$ 1.12	$ 0.92
Diluted earnings per share
Diluted earnings per share	1.11	0.92
Cash dividends declared per common share	$ 0.2325	$ 0.2300