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SHAREHOLDERS' EQUITY - General Information (Details) - shares | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2006 | Dec. 27, 2024 | Dec. 29, 2023 | Dec. 30, 2022 | Dec. 27, 2019 | Dec. 29, 2017 | Dec. 30, 2016 | Dec. 28, 2012 | Dec. 31, 2010 | Dec. 31, 2021 | Jun. 30, 2008 | Mar. 31, 2008 | Dec. 28, 2007
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Options, granted (in shares) |  | 0 | 0 | 0 |  |  |  |  |  |  |  |  |
Options outstanding (in shares) |  | 551,000 | 787,000 | 816,000 |  |  |  |  |  | 849,000 |  |  |
2006 Stock Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of common stock reserved for issuance (in shares) | 300,000 |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding (in shares) |  | 0 |  |  |  |  |  |  |  |  |  |  |
2008 Performance Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of common stock reserved for issuance (in shares) |  | 1,138,000 |  |  |  |  |  |  |  |  |  | 450,000 |
Number of shares available for grant (in shares) |  |  |  |  |  |  |  |  |  |  | 182,735 |  |
Number of additional shares authorized (in shares) |  | 675,000 | 750,000 | 478,000 | 955,000 | 875,000 | 500,000 | 500,000 | 350,000 |  |  |  |
Employee Stock Option | 2008 Performance Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum number of shares a participant may be granted in options to purchase during fiscal year |  | 300,000 |  |  |  |  |  |  |  |  |  |  |
Incentive Stock Options | 2008 Performance Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding (in shares) |  | 24,000 |  |  |  |  |  |  |  |  |  |  |
Non Statutory Stock Options | 2006 Stock Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Expiration period from date of grant | 10 years |  |  |  |  |  |  |  |  |  |  |  |
Non Statutory Stock Options | 2008 Performance Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Expiration period from date of grant |  | 10 years |  |  |  |  |  |  |  |  |  |  |
Options outstanding (in shares) |  | 527,000 |  |  |  |  |  |  |  |  |  |  |
Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Other than options, outstanding (in shares) |  | 146,000 | 171,000 | 135,000 |  |  |  |  |  | 110,000 |  |  |
Restricted Stock | 2008 Performance Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Other than options, outstanding (in shares) |  | 146,000 |  |  |  |  |  |  |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Other than options, outstanding (in shares) |  | 70,000 |  |  |  |  |  |  |  |  |  |  |
Restricted Stock Units (RSUs) | 2008 Performance Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Other than options, outstanding (in shares) |  | 70,000 |  |  |  |  |  |  |  |  |  |  |
Performance Shares |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Other than options, outstanding (in shares) |  | 169,000 | 130,000 | 66,000 |  |  |  |  |  | 224,000 |  |  |
Performance Shares | 2008 Performance Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Other than options, outstanding (in shares) |  | 168,000 |  |  |  |  |  |  |  |  |  |  |
Employee Stock |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares of common stock reserved for issuance (in shares) |  | 1,925,000 |  |  |  |  |  |  |  |  |  |  | 300,000
Number of shares available for grant (in shares) |  | 816,000 |  |  |  |  |  |  |  |  |  |  |
Purchase price per share as a percentage of fair market value |  | 85.00% |  |  |  |  |  |  |  |  |  |  |
Number of additional shares authorized (in shares) |  |  | 800,000 |  |  | 825,000 |  |  |  |  |  |  |
Employee Stock | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of participant's earnings to be contributed under a share based compensation plan |  | 1.00% |  |  |  |  |  |  |  |  |  |  |
Employee Stock | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of participant's earnings to be contributed under a share based compensation plan |  | 10.00% |  |  |  |  |  |  |  |  |  |  |

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