Unaudited Consolidated Statements of Income (USD $)	3 Months Ended		6 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
Unaudited Consolidated Statements of Income [Abstract]
Revenues	$ 148,521,800	$ 146,526,000	$ 301,468,100	$ 290,634,800
Cost of goods sold	113,085,800	110,033,200	230,783,300	218,704,100
Gross profit	35,436,000	36,492,800	70,684,800	71,930,700
Selling, general and administrative expenses	29,569,400	28,903,400	58,745,800	57,377,500
Income from operations	5,866,600	7,589,400	11,939,000	14,553,200
Interest expense, net	49,400	67,000	77,800	121,600
Income before provision for income taxes	5,817,200	7,522,400	11,861,200	14,431,600
Provision for income taxes	2,303,600	2,941,300	4,676,200	5,558,300
Net income	$ 3,513,600	$ 4,581,100	$ 7,185,000	$ 8,873,300
Basic earnings per share (in dollars per share)	$ 0.42	$ 0.56	$ 0.87	$ 1.09
Diluted earnings per share (in dollars per share)	$ 0.42	$ 0.55	$ 0.86	$ 1.06
Cash dividends declared per common share (in dollars per share)	$ 0.20	$ 0.18	$ 0.40	$ 0.36