Stock Based Compensation Stock Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 25, 2012	Dec. 27, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 55.63	$ 53.18	$ 37.46
Fair Value Assumptions, Expected Term (in years)	5 years	5 years	5 years
Fair Value Assumptions, Expected Volatility Rate (as a percent)	36.50%	40.30%	40.30%
Fair Value Assumptions, Risk Free Interest Rate (as a percent)	1.30%	0.80%	1.30%
Fair Value Assumptions, Expected Dividend Rate (as a percent)	0.00%	0.00%	0.00%
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested restricted stock (in shares)	395,000
Nonvested restricted stock, Weighted Average Grant Date Fair Value (in dollars per share)	$ 94.98
Granted restricted stock (in shares)	106,000
Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 165.62
Vested restricted stock in Period (in shares)	(123,000)
Vested in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 70.76
Forfeited in Period (in shares)	(27,000)
Forfeited in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 103.25
Nonvested restricted stock (in shares)	351,000	395,000
Nonvested restricted stock, Weighted Average Grant Date Fair Value (in dollars per share)	$ 124.26	$ 94.98
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ (3,400)	$ (3,000)	$ (2,900)
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Compensation Expense Charged to general and administrative	222	421	1,122
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	(83)	(163)	(428)
Allocated Share-based Compensation Expense, Net of Tax	139	258	694
Effect on earnings per share, basic (in dollars per share)	$ 0.01	$ 0.01	$ 0.02
Effect on earnings per share, diluted (in dollars per share)	$ 0.01	$ 0.01	$ 0.02
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding stock options (in shares)	46,000
Options, Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 59.94
Options, Grants in Period (in shares)	3,000
Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)	$ 156.30
Exercise of employee stock options, Shares (in shares)	(13,000)
Options, Exercises in Period, Weighted Average Exercise Price (in dollars per share)	$ 45.38
Options, Exercises in Period, Total Intrinsic Value	1,649
Options, Forfeitures and Expirations in Period (in shares)	0
Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price (in dollars per share)	$ 0
Outstanding stock options (in shares)	36,000	46,000
Options, Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 71.93	$ 59.94
Options, Outstanding, Weighted Average Remaining Contractual Term (in years)	1 year 7 months 6 days
Options, Outstanding, Intrinsic Value	3,736
Options, Number Exercisable (in shares)	36,000
Options, Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 71.93
Options, Exercisable, Weighted Average Remaining Contractual Term (in years)	1 year 7 months 6 days
Options, Exercisable, Intrinsic Value	3,736
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested restricted stock (in shares)	20,000
Nonvested restricted stock, Weighted Average Grant Date Fair Value (in dollars per share)	$ 89.70
Granted restricted stock (in shares)	18,000
Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 165.58
Vested restricted stock in Period (in shares)	(4,000)
Vested in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 58.23
Forfeited in Period (in shares)	(1,000)
Forfeited in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 99.60
Nonvested restricted stock (in shares)	33,000	20,000
Nonvested restricted stock, Weighted Average Grant Date Fair Value (in dollars per share)	$ 135.73	$ 89.70
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	4 years 5 months 25 days	3 years 10 months 13 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value	$ 1,343	$ 1,355
Equity Instuments Convertible Shares (in shares)	3,000
Equity Instruments, Convertible, Weighted Average Conversion Price (in dollars per share)	$ 75.65
Equity Instruments, Convertible, Weighted Average Contractual Term Remaining (in years)	2 years 6 months 4 days
Equity Instruments, Convertible, Aggreagte Intrinsic Value	$ 351,000