Consolidated Statements of Changes in Equity (USD $)	12 Months Ended
	Dec. 30, 2014	Dec. 31, 2013	Dec. 25, 2012	Dec. 30, 2014
Beginning Balance	$ 699,892,000	$ 821,919,000	$ 655,076,000	$ 736,184,000
Comprehensive income:
Net Income	179,293,000	196,169,000	173,448,000
Other comprehensive (loss) income	(1,027,000)	(1,005,000)	364,000
Comprehensive income	178,266,000	195,164,000	173,812,000
Issuance of common stock	3,247,000	2,841,000	2,462,000
Issuance of Restricted Stock, Net of Forfeitures	0	0	0
Exercise of employee stock options	1,117,000	575,000	4,455,000
Stock-based Compensation Expense	10,077,000	10,703,000	9,094,000
Conversion of Class B to Class A	0	0	0
Exercise of SSARs, value	(1,000)	(1,000)	(1,000)
Repurchase of common stock	(941,878)
Repurchase of common stock	159,503,000	339,409,000	31,566,000
Tax Benefit from Exercise of Stock Options	3,089,000	8,100,000	8,587,000
Common Stock [Member] | Common Stock Class A [Member]
Beginning Balance	3,000	3,000	3,000	3,000
Beginning Balance, Shares (in shares)	26,290,000	28,209,000	28,266,000	25,443,000
Comprehensive income:
Issuance of common stock	0	0	0
Issuance of common stock (in shares)	23,000	20,000	20,000
Issuance of Restricted Stock, Net of Forfeitures	0	0	0
Issuance of Restricted Stock, net of forfeitures (in shares)	82,000	78,000	28,000
Exercise of employee stock options	0	0	0
Exercise of employee stock options (in shares)	23,000	12,000	96,000
Conversion of Class B to Class A	0	0	0
Conversion of Class B to Class A	0	2,000	0
Exercise of SSARs, shares	3,000	2,000	1,000
Exercise of SSARs, value	0	0	0
Repurchase of common stock	(978,000)	(2,033,000)	(202,000)
Repurchase of common stock	0	0	0
Common Stock [Member] | Common Stock Class B [Member]
Beginning Balance	0	0	0	0
Beginning Balance, Shares (in shares)	1,382,000	1,384,000	1,384,000	1,382,000
Comprehensive income:
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	0
Conversion of Class B to Class A	0	(2,000)	0
Exercise of SSARs, shares	0	0	0
Exercise of SSARs, value	0	0	0
Repurchase of common stock	0	0	0
Repurchase of common stock	0	0	0
Treasury Stock [Member]
Beginning Balance	(546,570,000)	(207,161,000)	(175,595,000)	(706,073,000)
Beginning Balance, Shares (in shares)	4,283,000	2,250,000	2,048,000	5,261,000
Comprehensive income:
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	0
Conversion of Class B to Class A	0	0	0
Exercise of SSARs, shares	0	0	0
Exercise of SSARs, value	0	0	0
Repurchase of common stock	159,503,000	339,409,000	31,566,000
Repurchase of common stock	978,000	2,033,000	202,000
Additional Paid-in Capital [Member]
Beginning Balance	196,908,000	174,690,000	150,093,000	214,437,000
Comprehensive income:
Net Income	0	0	0
Other comprehensive (loss) income	0	0	0
Issuance of common stock	3,247,000	2,841,000	2,462,000
Issuance of Restricted Stock, Net of Forfeitures	0	0	0
Exercise of employee stock options	1,117,000	575,000	4,455,000
Stock-based Compensation Expense	10,077,000	10,703,000	9,094,000
Conversion of Class B to Class A	0	0	0
Exercise of SSARs, value	(1,000)	(1,000)	(1,000)
Repurchase of common stock	0	0	0
Tax Benefit from Exercise of Stock Options	3,089,000	8,100,000	8,587,000
Retained Earnings [Member]
Beginning Balance	1,049,884,000	853,715,000	680,267,000	1,229,177,000
Comprehensive income:
Net Income	179,293,000	196,169,000	173,448,000
Other comprehensive (loss) income	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	0
Exercise of SSARs, value	0	0	0
Repurchase of common stock	0	0	0
Tax Benefit from Exercise of Stock Options	0	0	0
Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance	(333,000)	672,000	308,000	(1,360,000)
Comprehensive income:
Net Income	0	0	0
Other comprehensive (loss) income	(1,027,000)	(1,005,000)	364,000
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	0
Exercise of SSARs, value	0	0	0
Repurchase of common stock	0	0	0
Tax Benefit from Exercise of Stock Options	$ 0	$ 0	$ 0