Stockholders' Equity (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 25, 2016 USD ($) installment $ / shares shares	Dec. 27, 2015 USD ($) $ / shares shares	Dec. 28, 2014 USD ($) $ / shares shares
Note 10 - Stockholders' Equity (Details) [Line Items]
Closing stock price (in Dollars per share) | $ / shares	$ 160.10
Total intrinsic value of options exercised during the period	$ 1,863	$ 7,021	$ 3,029
Total fair value of options vested during the period	$ 1,521	$ 1,361	$ 1,138
Weighted average grant date fair value of options granted during the period | $ / shares	$ 46.80	$ 59.11	$ 50.23
Weighted average grant date fair value of restricted units granted during the period | $ / shares	$ 148.31
Reversal of previously recognized expenses due to revisions in estimates of financial performance	$ 3,222
Restricted Stock Units (RSUs)
Note 10 - Stockholders' Equity (Details) [Line Items]
Award vesting period	3 years	3 years	3 years
Cost not yet recognized	$ 929
Period for recognition	1 year 9 months
Award vesting requirement, duration of earnings target	3 years	3 years	3 years
Total grant date fair value of restricted stock vested during the period	$ 13,848	$ 14,157
Weighted average grant date fair value of restricted units granted during the period | $ / shares	$ 148.31	$ 180.60	$ 147.46
Restricted stock or unit expense	$ (1,953)	$ 11,454	$ 12,474
Equity Incentive Plan
Note 10 - Stockholders' Equity (Details) [Line Items]
Common stock, capital shares reserved for future issuance | shares	1,600,000
Number of shares available for grant (in shares) | shares	641,933
Cost not yet recognized	$ 2,256
Period for recognition	2 years 4 months
Equity Incentive Plan | Incentive Stock Options
Note 10 - Stockholders' Equity (Details) [Line Items]
Number of installments | installment	4
Equity Incentive Plan | Incentive Stock Options | Minimum
Note 10 - Stockholders' Equity (Details) [Line Items]
Payment award contractual life	7 years
Equity Incentive Plan | Nonqualified Stock Options
Note 10 - Stockholders' Equity (Details) [Line Items]
Award vesting period	4 years
Equity Incentive Plan | Nonqualified Stock Options | Minimum
Note 10 - Stockholders' Equity (Details) [Line Items]
Payment award contractual life	7 years
Employee Stock Purchase Plan
Note 10 - Stockholders' Equity (Details) [Line Items]
Common stock, capital shares reserved for future issuance | shares	600,000
Number of shares available for grant (in shares) | shares	161,139
Market price less discount	85.00%
Shares issued during the period | shares	24,619	18,510	17,040