Note 8 - Stockholders' Equity (Details) (USD $) | 9 Months Ended |
In Thousands, except Share data, unless otherwise specified | Sep. 29, 2013 | Sep. 23, 2012 |
Note 8 - Stockholders' Equity (Details) [Line Items] | ' | ' |
Closing Stock Price (in Dollars per share) | $109.50 | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value (in Dollars) | $833 | $1,183 |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share) | $87.53 | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) | $87.67 | ' |
Restricted Stock or Unit Expense (in Dollars) | 6,133 | 5,205 |
Share Based Compensation Arrangement by Share Based Payment Award Market Price Less Discount | 85.00% | ' |
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in Shares) | 14,505 | 14,505 |
Equity Incentive Plan [Member] | ' | ' |
Note 8 - Stockholders' Equity (Details) [Line Items] | ' | ' |
Common Stock, Capital Shares Reserved for Future Issuance (in Shares) | 5,400,000 | ' |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars) | 1,838 | ' |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | '2 years 219 days | ' |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share) | $37.09 | $43.97 |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares) | 1,335,150 | ' |
Incentive Stock Options [Member] | ' | ' |
Note 8 - Stockholders' Equity (Details) [Line Items] | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights | 'four equal installments from the date of the grant | ' |
Incentive Stock Options [Member] | Minimum [Member] | ' | ' |
Note 8 - Stockholders' Equity (Details) [Line Items] | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award Contractual Life | '7 years | ' |
Incentive Stock Options [Member] | Maximum [Member] | ' | ' |
Note 8 - Stockholders' Equity (Details) [Line Items] | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award Contractual Life | '10 years | ' |
Nonqualified Stock Options [Member] | ' | ' |
Note 8 - Stockholders' Equity (Details) [Line Items] | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights | 'varying vesting periods from immediately to four years and have a contractual life of seven to ten years | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | '4 years | ' |
Nonqualified Stock Options [Member] | Minimum [Member] | ' | ' |
Note 8 - Stockholders' Equity (Details) [Line Items] | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award Contractual Life | '7 years | ' |
Nonqualified Stock Options [Member] | Maximum [Member] | ' | ' |
Note 8 - Stockholders' Equity (Details) [Line Items] | ' | ' |
Share-based Compensation Arrangement by Share-based Payment Award Contractual Life | '10 years | ' |
Restricted Stock Units (RSUs) [Member] | ' | ' |
Note 8 - Stockholders' Equity (Details) [Line Items] | ' | ' |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars) | $14,270 | ' |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | '2 years | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) | $87.67 | $93.23 |
Employee Stock Purchase Plan [Member] | ' | ' |
Note 8 - Stockholders' Equity (Details) [Line Items] | ' | ' |
Common Stock, Capital Shares Reserved for Future Issuance (in Shares) | 600,000 | ' |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares) | 233,415 | ' |