Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Share data	3 Months Ended
	Jul. 03, 2011	Jun. 30, 2010
Condensed Consolidated Statements of Income [Abstract]
Sales	$ 88,594	$ 74,665
Cost of sales	(70,667)	(56,218)
Gross profit	17,927	18,447
Selling, general and administrative expenses	(7,857)	(6,661)
Operating income	10,070	11,786
Investment income	65	106
Income from continuing operations before income taxes	10,135	11,892
Provision for income taxes	(3,782)	(4,555)
Income from continuing operations	6,353	7,337
Income from discontinued operations, net of tax	374
Net income	$ 6,727	$ 7,337
Weighted average number of shares outstanding-basic	10,307,177	10,253,458
Weighted average number of shares outstanding-diluted	10,362,172	10,308,270
Basic earnings per share
Earnings per share from continuing operations	$ 0.61	$ 0.72
Earnings per share from discontinued operations	$ 0.04
Basic earnings per share	$ 0.65	$ 0.72
Diluted earnings per share
Earnings per share from continuing operations	$ 0.61	$ 0.71
Earnings per share from discontinued operations	$ 0.04
Diluted earnings per share	$ 0.65	$ 0.71
Cash dividends declared per common share