Capital Stock (Details Textual) (USD $)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Capital Stock (Textual) [Abstract]
Unrecognized compensation cost related to stock options	$ 500,000
Unrecognized compensation cost related to stock options, weighted-average period	3 years 2 months 12 days
Options exercised	438,800	298,100	489,900
Common stock included for calculation of diluted earnings per share in accordance with the program	370,000	504,000	698,000
Capital Stock (Additional Textual) [Abstract]
Share repurchase program shares authorized to be repurchased	1,000,000
Shares authorized of undesignated capital stock for future issuance.	50,000,000
Percentage of outstanding shares owned by controlling family	31.00%
Authorized number of common stock shares for grant	2,000,000
Maximum grant period from date of plan approval	10 years
Date of plan approval	May 20, 2009
Shares available for grant under the plan	1,671,200
Compensation cost charged against income for stock options	204,000	194,000	153,000
Percentage of forfeiture assumption in calculation of compensation cost	5.40%	5.40%	5.20%
Shares available to purchase under Employee Stock Purchase Plan	1,200,000
Intrinsic value of stock options exercised	9,600,000
Cash received from option exercises under the plan	1,606,000	629,000	757,000
Tax benefit generated from compensation cost and credited to additional paid in capital	2,700,000	1,000,000
Dividends paid	(54,716,000)
Total 401(K) expense	2,000,000	1,600,000	1,600,000
Repurchase and cancellation of shares	70,208	90,268
Common stock repurchased, average price	$ 27.68	$ 17.59
Common stock, shares held by 401(K) plan	501,548
Shares repurchased under share repurchase program		0	0
Cash dividend,per share	$ 1.50
Incentive stock plan [Member]
Capital Stock (Textual) [Abstract]
Weighted-average grant-date fair value of options granted	$ 11.05		$ 9.30
Employee Stock Purchase Plan [Member]
Capital Stock (Textual) [Abstract]
Percentage of annual compensation permitted to purchase	4.00%
Option price percentage of fair market value	85.00%
Employee Stock Purchase Plan, minimum purchase price		$ 12.68	$ 7.40
Employee Stock Purchase Plan, maximum purchase price		$ 16.38	$ 19.83
Proceeds from stock sales of Employee Stock Purchase Plan		28,600	16,700
Options exercised		1,984	1,428
Restricted stock [Member]
Capital Stock (Textual) [Abstract]
Compensation cost related to restricted stock	803,000	426,000	59,000
Unrecognized compensation cost related to stock options	$ 2,700,000
Unrecognized compensation cost related to stock options, weighted-average period	3 years 4 months 24 days
Performance-Based Long Term Award Program [Member]
Capital Stock (Textual) [Abstract]
Common stock included for calculation of diluted earnings per share in accordance with the program	4,400