Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 01, 2017	Dec. 27, 2015	Jan. 01, 2017	Dec. 27, 2015
Income Statement [Abstract]
Sales	$ 112,351	$ 88,375	$ 364,975	$ 284,463
Cost of sales	(91,439)	(73,666)	(288,815)	(229,208)
Gross profit	20,912	14,709	76,160	55,255
Selling, general and administrative expenses	(14,916)	(12,825)	(44,913)	(33,019)
Operating income	5,996	1,884	31,247	22,236
Interest (expense) income, net	(634)	(27)	(1,977)	(21)
Income before income taxes	5,362	1,857	29,270	22,215
Income tax provision	(1,811)	(1,042)	(10,925)	(8,931)
Net income	$ 3,551	$ 815	$ 18,345	$ 13,284
Weighted average number of shares outstanding - basic	10,538,328	10,478,266	10,529,259	10,534,933
Weighted average number of shares outstanding - diluted	10,595,140	10,528,126	10,592,550	10,591,543
Basic earnings per share
Basic earnings per share	$ 0.34	$ 0.08	$ 1.74	$ 1.26
Diluted earnings per share
Diluted earnings per share	0.34	0.08	1.73	1.25
Cash dividends declared per common share	$ 0	$ 0	$ 0.42	$ 0.40