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FAIR VALUE - Asset Measured at Fair Value (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 25, 2021
--- | --- | ---
Fixed Income | Restricted Investment |  |
Fair Value |  |
Investments at fair value | $ 19,600 |
Money market funds | Cash and Cash Equivalents |  |
Fair Value |  |
Investments at fair value | 391,200 |
Money market funds | Restricted Investment |  |
Fair Value |  |
Investments at fair value | 300 |
Mutual funds, equity and alternative investments | Investments |  |
Fair Value |  |
Investments at fair value | 36,100 |
Money market and mutual funds | Other Non current Assets |  |
Fair Value |  |
Investments at fair value | 500 |
Ardellis Insurance Ltd. |  |
Fair Value |  |
Total Fair Value | 55,642 | $ 55,415
Estimate of Fair Value Measurement | Recurring |  |
Fair Value |  |
Investments at fair value | 447,666 | 65,528
Estimate of Fair Value Measurement | Recurring | Fixed Income |  |
Fair Value |  |
Investments at fair value | 19,286 | 18,578
Estimate of Fair Value Measurement | Recurring | Money market funds |  |
Fair Value |  |
Investments at fair value | 391,505 | 9,411
Estimate of Fair Value Measurement | Recurring | Treasury securities |  |
Fair Value |  |
Investments at fair value | 343 | 342
Estimate of Fair Value Measurement | Recurring | Equity |  |
Fair Value |  |
Investments at fair value | 17,337 | 20,163
Estimate of Fair Value Measurement | Recurring | Alternative Investments |  |
Fair Value |  |
Investments at fair value | 4,102 | 3,785
Estimate of Fair Value Measurement | Recurring | Mutual Fund |  |
Fair Value |  |
Investments at fair value | 15,093 | 13,249
Estimate of Fair Value Measurement | Recurring | Domestic stock |  |
Fair Value |  |
Investments at fair value | 13,067 | 10,910
Estimate of Fair Value Measurement | Recurring | International stock funds |  |
Fair Value |  |
Investments at fair value | 1,414 | 1,687
Estimate of Fair Value Measurement | Recurring | Target funds |  |
Fair Value |  |
Investments at fair value | 8 | 23
Estimate of Fair Value Measurement | Recurring | Bond funds |  |
Fair Value |  |
Investments at fair value | 130 | 146
Estimate of Fair Value Measurement | Recurring | Alternative funds |  |
Fair Value |  |
Investments at fair value | 474 | 483
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) |  |
Fair Value |  |
Investments at fair value | 425,586 | 35,441
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Fixed Income |  |
Fair Value |  |
Investments at fair value | 2,594 | 1,668
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Money market funds |  |
Fair Value |  |
Investments at fair value | 390,219 | 19
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Treasury securities |  |
Fair Value |  |
Investments at fair value | 343 | 342
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Equity |  |
Fair Value |  |
Investments at fair value | 17,337 | 20,163
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Mutual Fund |  |
Fair Value |  |
Investments at fair value | 15,093 | 13,249
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Domestic stock |  |
Fair Value |  |
Investments at fair value | 13,067 | 10,910
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | International stock funds |  |
Fair Value |  |
Investments at fair value | 1,414 | 1,687
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Target funds |  |
Fair Value |  |
Investments at fair value | 8 | 23
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Bond funds |  |
Fair Value |  |
Investments at fair value | 130 | 146
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Alternative funds |  |
Fair Value |  |
Investments at fair value | 474 | 483
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2) |  |
Fair Value |  |
Investments at fair value | 17,978 | 26,302
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2) | Fixed Income |  |
Fair Value |  |
Investments at fair value | 16,692 | 16,910
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2) | Money market funds |  |
Fair Value |  |
Investments at fair value | 1,286 | 9,392
Estimate of Fair Value Measurement | Recurring | Prices with Unobservable Inputs (Level 3) |  |
Fair Value |  |
Investments at fair value | 4,102 | 3,785
Estimate of Fair Value Measurement | Recurring | Prices with Unobservable Inputs (Level 3) | Alternative Investments |  |
Fair Value |  |
Investments at fair value | $ 4,102 | $ 3,785

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