Consolidated Statements of Shareholders' Equity (USD $)	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
BALANCE at Dec. 25, 2010	$ 23,013,000	$ 513,700	$ 22,499,300
BALANCE (in shares) at Dec. 25, 2010		5,020,739
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock	(3,527,200)	(1,942,400)	(1,584,800)
Repurchase of common stock (in shares)		(99,494)
Stock options exercised and related tax benefits	1,302,800	1,302,800
Stock options exercised and related tax benefits (in shares)		66,398
Compensation expense relating to stock options	755,700	755,700
Cash dividends	(547,600)		(547,600)
Comprehensive income (loss)	14,112,000		14,095,000	17,000
BALANCE at Dec. 31, 2011	35,108,700	629,800	34,461,900	17,000
BALANCE (in shares) at Dec. 31, 2011		4,987,643
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock	(7,220,300)	(3,874,900)	(3,345,400)
Repurchase of common stock (in shares)		(134,720)
Stock options exercised and related tax benefits	2,314,900	2,314,900
Stock options exercised and related tax benefits (in shares)		143,536
Compensation expense relating to stock options	930,200	930,200
Cash dividends	(26,122,400)		(26,122,400)
Comprehensive income (loss)	12,916,900		12,937,900	(21,000)
BALANCE at Dec. 29, 2012	$ 17,928,000		$ 17,932,000	$ (4,000)
BALANCE (in shares) at Dec. 29, 2012		4,996,459