Earnings Per Share (Details) (USD $)	3 Months Ended								12 Months Ended
	Mar. 31, 2013	Dec. 30, 2012	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Dec. 25, 2011	Sep. 25, 2011	Jun. 26, 2011	Mar. 31, 2013	Apr. 01, 2012	Mar. 27, 2011
Earnings per share - Basic [Abstract]
Net earnings	$ 2,919,800	$ 5,398,700	$ 5,268,900	$ 4,206,500	$ 3,548,900	$ 4,773,600	$ 3,540,200	$ 4,574,200	$ 17,793,900	$ 16,436,900	$ 10,018,200
Less: Distributed and undistributed earnings allocated to nonvested stock									(200,000)	(239,000)	(180,000)
Earnings available to common shareholders - Basic									17,594,000	16,198,000	9,838,000
Weighted average common shares outstanding - Basic (in shares)									7,929,000	7,639,000	7,394,000
Earnings per common share - Basic (in dollars per share)									$ 2.22	$ 2.12	$ 1.33
Earnings per share - Diluted [Abstract]
Net earnings	2,919,800	5,398,700	5,268,900	4,206,500	3,548,900	4,773,600	3,540,200	4,574,200	17,793,900	16,436,900	10,018,200
Less: Distributed and undistributed earnings allocated to nonvested stock									(197,000)	(231,000)	(174,000)
Earnings available to common shareholders - Diluted									$ 17,597,000	$ 16,206,000	$ 9,844,000
Weighted average common shares outstanding - Basic (in shares)									7,929,000	7,639,000	7,394,000
Effect of dilutive options (in shares)									271,000	356,000	362,000
Weighted average common shares outstanding - Diluted (in shares)									8,200,000	7,995,000	7,756,000
Earnings per common share - Diluted (in dollars per share)	$ 0.35	$ 0.65	$ 0.64	$ 0.51	$ 0.43	$ 0.59	$ 0.44	$ 0.57	$ 2.15	$ 2.03	$ 1.27
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock outstanding (in shares)	7,987,900				7,744,528				7,987,900	7,744,528
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock outstanding (in shares)	0				0				0	0	135,000
Performance Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock outstanding (in shares)	0								0
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock outstanding (in shares)	0								0