Stock Based Compensation Stock Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 27, 2016	Dec. 29, 2015	Dec. 30, 2014
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)	348,000
Nonvested restricted stock, Weighted Average Grant Date Fair Value (in dollars per share)	$ 166.15
Granted restricted stock (in shares)	90,000
Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 214.32
Vested restricted stock in Period (in shares)	(79,000)
Vested in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 145.32
Forfeited in Period (in shares)	(43,000)
Forfeited in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 180.42
Nonvested restricted stock (in shares)	316,000	348,000
Nonvested restricted stock, Weighted Average Grant Date Fair Value (in dollars per share)	$ 183.25	$ 166.15
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 5,100	$ 5,000	$ 3,300
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding stock options (in shares)	15,000
Options, Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 146.79
Options, Grants in Period (in shares)	3,000
Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)	$ 195.19
Exercise of employee stock options, Shares (in shares)	(4,000)
Options, Exercises in Period, Weighted Average Exercise Price (in dollars per share)	$ 103.64
Options, Exercises in Period, Total Intrinsic Value	$ 381
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)	14,000	15,000
Options, Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 169.46	$ 146.79
Options, Outstanding, Weighted Average Remaining Contractual Term (in years)	3 years 1 month 6 days
Options, Outstanding, Intrinsic Value	$ 573
Options, Number Exercisable (in shares)	14,000
Options, Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 169.46
Options, Exercisable, Weighted Average Remaining Contractual Term (in years)	3 years 1 month 6 days
Options, Exercisable, Intrinsic Value	$ 573
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)	$ 53.04	$ 47.56	$ 46.01
Fair Value Assumptions, Expected Term (in years)	5 years	5 years	5 years
Fair Value Assumptions, Expected Volatility Rate (as a percent)	26.40%	27.60%	28.80%
Fair Value Assumptions, Risk Free Interest Rate (as a percent)	1.30%	1.60%	1.60%
Fair Value Assumptions, Expected Dividend Rate (as a percent)	0.00%	0.00%	0.00%
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)	57,000
Nonvested restricted stock, Weighted Average Grant Date Fair Value (in dollars per share)	$ 165.54
Granted restricted stock (in shares)	8,000
Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 210.55
Vested restricted stock in Period (in shares)	(4,000)
Vested in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 125.38
Forfeited in Period (in shares)	(6,000)
Forfeited in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 177.98
Nonvested restricted stock (in shares)	55,000	57,000
Nonvested restricted stock, Weighted Average Grant Date Fair Value (in dollars per share)	$ 173.44	$ 165.54
SSARs outstanding weighted average period of conversion (in years)	3 years 10 months 24 days	4 years 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value	$ 2,060	$ 1,814
Equity Instruments Convertible Shares	11,000
Equity Instruments, Convertible, Weighted Average Conversion Price (in dollars per share)	$ 160.60
Equity Instruments, Convertible, Weighted Average Contractual Term Remaining (in years)	2 years 4 months 24 days
Equity Instruments, Convertible, Aggregate Intrinsic Value	$ 541