Consolidated Statements of Changes in Equity (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 25, 2012	Dec. 27, 2011	Dec. 31, 2013
Beginning Balance	$ 821,919,000	$ 655,076,000	$ 595,608,000	$ 699,892,000
Comprehensive income:
Net Income	196,169,000	173,448,000	135,952,000
Other comprehensive income (loss):
Foreign Currency Translation Adjustment	(1,005,000)	364,000	33,000
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	195,164,000	173,812,000	135,985,000
Issuance of common stock	2,841,000	2,462,000	2,040,000
Issuance of Restricted Stock, Net of Forfeitures	0	0	0
Exercise of employee stock options	575,000	4,455,000	3,193,000
Stock-based Compensation Expense	10,703,000	9,094,000	9,861,000
Conversion of Class B to Class A	0		0
Exercise of SSARs, value	(1,000)	(1,000)
Stock Repurchased and Retired During Period, Value	339,409,000	31,566,000	96,605,000
Tax Benefit from Exercise of Stock Options	8,100,000	8,587,000	4,994,000
Common Stock [Member] | Common Stock Class A [Member]
Beginning Balance	3,000	3,000	3,000	3,000
Beginning Balance, Shares (in shares)	28,209,000	28,266,000	29,007,000	26,290,000
Other comprehensive income (loss):
Issuance of common stock	0	0	0
Issuance of common stock (in shares)	20,000	20,000	21,000
Issuance of Restricted Stock, Net of Forfeitures	0	0	0
Issuance of Restricted Stock, net of forfeitures (in shares)	78,000	28,000	93,000
Exercise of employee stock options	0	0	0
Exercise of employee stock options (in shares)	12,000	96,000	65,000
Conversion of Class B to Class A	0		0
Conversion of Class B to Class A (in shares)	2,000		8,000
Exercise of SSARs, shares	2,000	1,000	1,000
Stock Repurchased and Retired During Period, Shares	(2,033,000)	(202,000)	(929,000)
Stock Repurchased and Retired During Period, Value	0	0	0
Common Stock [Member] | Common Stock Class B [Member]
Beginning Balance	0	0	0	0
Beginning Balance, Shares (in shares)	1,384,000	1,384,000	1,392,000	1,382,000
Other comprehensive income (loss):
Issuance of common stock	0	0	0
Issuance of common stock (in shares)	0	0	0
Issuance of Restricted Stock, Net of Forfeitures	0	0	0
Issuance of Restricted Stock, net of forfeitures (in shares)	0	0	0
Exercise of employee stock options	0	0	0
Exercise of employee stock options (in shares)	0	0	0
Conversion of Class B to Class A	0		0
Conversion of Stock, Shares Converted	(2,000)		(8,000)
Stock Repurchased and Retired During Period, Shares	0	0	0
Stock Repurchased and Retired During Period, Value	0	0	0
Treasury Stock [Member]
Beginning Balance	(207,161,000)	(175,595,000)	(78,990,000)	(546,570,000)
Beginning Balance, Shares (in shares)	2,250,000	2,048,000	1,119,000	4,283,000
Other comprehensive income (loss):
Issuance of common stock	0	0	0
Issuance of common stock (in shares)	0	0	0
Issuance of Restricted Stock, Net of Forfeitures	0	0	0
Issuance of Restricted Stock, net of forfeitures (in shares)	0	0	0
Exercise of employee stock options	0	0	0
Exercise of employee stock options (in shares)	0	0	0
Conversion of Class B to Class A	0		0
Conversion of Class B to Class A (in shares)	0		0
Stock Repurchased and Retired During Period, Value	339,409,000	31,566,000	96,605,000
Repurchase of common stock (in shares)	2,033,000	202,000	929,000
Additional Paid-in Capital [Member]
Beginning Balance	174,690,000	150,093,000	130,005,000	196,908,000
Comprehensive income:
Net Income	0	0	0
Other comprehensive income (loss):
Foreign Currency Translation Adjustment	0	0
Issuance of common stock	2,841,000	2,462,000	2,040,000
Issuance of Restricted Stock, Net of Forfeitures	0	0	0
Exercise of employee stock options	575,000	4,455,000	3,193,000
Stock-based Compensation Expense	10,703,000	9,094,000	9,861,000
Conversion of Class B to Class A	0		0
Stock Repurchased and Retired During Period, Value	0	0	0
Tax Benefit from Exercise of Stock Options	8,100,000	8,587,000	4,994,000
Retained Earnings [Member]
Beginning Balance	853,715,000	680,267,000	544,315,000	1,049,884,000
Comprehensive income:
Net Income	196,169,000	173,448,000	135,952,000
Other comprehensive income (loss):
Foreign Currency Translation Adjustment	0	0	0
Issuance of common stock	0	0	0
Issuance of Restricted Stock, Net of Forfeitures	0	0	0
Exercise of employee stock options	0	0	0
Stock-based Compensation Expense	0	0	0
Conversion of Class B to Class A	0		0
Stock Repurchased and Retired During Period, Value	0	0	0
Tax Benefit from Exercise of Stock Options	0	0	0
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance	672,000	308,000	275,000	(333,000)
Comprehensive income:
Net Income	0	0	0
Other comprehensive income (loss):
Foreign Currency Translation Adjustment	(1,005,000)	364,000	33,000
Issuance of common stock	0	0	0
Issuance of Restricted Stock, Net of Forfeitures	0	0	0
Exercise of employee stock options	0	0	0
Stock-based Compensation Expense	0	0	0
Conversion of Class B to Class A	0		0
Stock Repurchased and Retired During Period, Value	0	0	0
Tax Benefit from Exercise of Stock Options	$ 0	$ 0	$ 0