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RESTRICTED CASH AND INVESTMENTS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 25, 2022 | Dec. 26, 2021
Restricted Cash and Investments [Line Items] |  |  |
Cash collateral held by insurance carriers | $ 23,598 | $ 29,567 |
Cash and cash equivalents held in Trust | 12,703 | 30,857 |
Investments held in Trust | 122,659 | 123,678 |
Company-owned life insurance policies | 32,905 | 26,479 |
Other restricted cash and cash equivalents | 1,120 | 3,153 |
Total restricted cash and investments | 192,985 | 213,734 |
Amortized cost | 122,659 | 123,678 |
Gross unrealized gain | 533 | 6 |
Gross unrealized losses | (2,279) | (4,159) |
Fair value | 120,913 | 119,525 |
Amortized cost |  |  |
Total held-to-maturity investments | 122,659 | 123,678 |
Fair value |  |  |
Total held-to-maturity investments | 120,913 | 119,525 |
Proceeds from company-owned life insurance | 1,662 | 0 | $ 832
Amount in excess of cash surrender value | 1,400 |  |
Unrealized gains (losses) | 4,383 | (5,841) | $ 1,061
Municipal debt securities |  |  |
Restricted Cash and Investments [Line Items] |  |  |
Amortized cost | 32,042 | 42,892 |
Gross unrealized gain | 4 | 2 |
Gross unrealized losses | (242) | (463) |
Fair value | 31,804 | 42,431 |
Amortized cost |  |  |
Total held-to-maturity investments | 32,042 | 42,892 |
Fair value |  |  |
Total held-to-maturity investments | 31,804 | 42,431 |
Corporate debt securities |  |  |
Restricted Cash and Investments [Line Items] |  |  |
Amortized cost | 76,578 | 79,736 |
Gross unrealized gain | 333 | 4 |
Gross unrealized losses | (1,999) | (3,643) |
Fair value | 74,912 | 76,097 |
Amortized cost |  |  |
Total held-to-maturity investments | 76,578 | 79,736 |
Fair value |  |  |
Total held-to-maturity investments | 74,912 | 76,097 |
Agency mortgage-backed securities |  |  |
Restricted Cash and Investments [Line Items] |  |  |
Amortized cost | 13,039 | 50 |
Gross unrealized gain | 196 | 0 |
Gross unrealized losses | 0 | (2) |
Fair value | 13,235 | 48 |
Amortized cost |  |  |
Total held-to-maturity investments | 13,039 | 50 |
Fair value |  |  |
Total held-to-maturity investments | 13,235 | 48 |
U.S. government and agency securities |  |  |
Restricted Cash and Investments [Line Items] |  |  |
Amortized cost | 1,000 | 1,000 |
Gross unrealized gain | 0 | 0 |
Gross unrealized losses | (38) | (51) |
Fair value | 962 | 949 |
Amortized cost |  |  |
Total held-to-maturity investments | 1,000 | 1,000 |
Fair value |  |  |
Total held-to-maturity investments | 962 | $ 949 |
Restricted Cash and Investments |  |  |
Restricted Cash and Investments [Line Items] |  |  |
Amortized cost | 122,659 |  |
Fair value | 120,913 |  |
Amortized cost |  |  |
Due in one year or less | 27,414 |  |
Due after one year through five years | 82,847 |  |
Due after five years through ten years | 5,818 |  |
Due after ten years | 6,580 |  |
Total held-to-maturity investments | 122,659 |  |
Fair value |  |  |
Due in one year or less | 27,118 |  |
Due after one year through five years | 81,146 |  |
Due after five years through ten years | 5,922 |  |
Due after ten years | 6,727 |  |
Total held-to-maturity investments | $ 120,913 |  |

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- Definition Amount of unrealized gain (loss) on investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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