Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Apr. 03, 2011
Income Statement [Abstract]
Sales	$ 350,387	$ 343,834	$ 297,641
Cost of sales	(286,241)	(277,966)	(235,739)
Pension withdrawal	(7,210)	0	0
Gross profit	56,936	65,868	61,902
Selling, general and administrative expenses	(31,606)	(30,759)	(29,940)
Operating income	25,330	35,109	31,962
Investment income, net	84	145	333
Income from continuing operations before income taxes	25,414	35,254	32,295
Provision for income taxes	(8,306)	(13,626)	(11,981)
Income from continuing operations	17,108	21,628	20,314
Income from discontinued operations, net of tax	18	1,057	0
Net income	$ 17,126	$ 22,685	$ 20,314
Weighted average number of shares outstanding-basic (shares)	10,464,820	10,339,391	10,260,135
Weighted average number of shares outstanding-diluted (shares)	10,541,142	10,408,573	10,352,633
Basic earnings per share:
Earnings per share from continuing operations (usd per share)	$ 1.64	$ 2.09	$ 1.98
Earnings per share from discontinued operations (usd per share)	$ 0.00	$ 0.10	$ 0.00
Basic earnings per share (usd per share)	$ 1.64	$ 2.19	$ 1.98
Diluted earnings per share
Earnings per share from continuing operations (usd per share)	$ 1.62	$ 2.08	$ 1.96
Earnings per share from discontinued operations (usd per share)	$ 0.00	$ 0.10	$ 0.00
Diluted earnings per share (usd per share)	$ 1.62	$ 2.18	$ 1.96
Cash dividends declared per common share (usd per share)	$ 0.68	$ 0.64	$ 0.70