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RESTRICTED CASH AND INVESTMENTS (Tables) | 6 Months Ended
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Jun. 30, 2024
Restricted Cash and Investments [Abstract] |
Schedule of restricted cash and investments | The following is a summary of the carrying value of our restricted cash, cash equivalents and investments:
(in thousands) | June 30, 2024 | December 31, 2023
Cash collateral held by insurance carriers | $ | 23,896 |  | $ | 23,598 |
Cash and cash equivalents held in Trust | 5,816 |  | 12,703 |
Investments held in Trust | 113,268 |  | 122,659 |
Company-owned life insurance policies | 39,627 |  | 32,905 |
Other restricted cash and cash equivalents | 745 |  | 1,120 |
Total restricted cash, cash equivalents and investments | $ | 183,352 |  | $ | 192,985 |
Schedule of held-to-maturity investments | The amortized cost and estimated fair value of our held-to-maturity investments held in Trust, aggregated by investment category as of June 30, 2024 and December 31, 2023, were as follows:
| June 30, 2024
(in thousands) | Amortized cost | Gross unrealized gains | Gross unrealized losses | Fair value
Municipal debt securities | $ | 29,150 |  | $ | — |  | $ | (316) |  | $ | 28,834 |
Corporate debt securities | 71,296 |  | 71 |  | (1,830) |  | 69,537 |
Agency mortgage-backed securities | 11,823 |  | 53 |  | (33) |  | 11,843 |
U.S. government and agency securities | 999 |  | — |  | (42) |  | 957 |
Total held-to-maturity investments | $ | 113,268 |  | $ | 124 |  | $ | (2,221) |  | $ | 111,171 |
| December 31, 2023
(in thousands) | Amortized cost | Gross unrealized gains | Gross unrealized losses | Fair value
Municipal debt securities | $ | 32,042 |  | $ | 4 |  | $ | (242) |  | $ | 31,804 |
Corporate debt securities | 76,578 |  | 333 |  | (1,999) |  | 74,912 |
Agency mortgage-backed securities | 13,039 |  | 196 |  | — |  | 13,235 |
U.S. government and agency securities | 1,000 |  | — |  | (38) |  | 962 |
Total held-to-maturity investments | $ | 122,659 |  | $ | 533 |  | $ | (2,279) |  | $ | 120,913 |
Schedule of held-to-maturity investments by contractual maturity | The amortized cost and fair value by contractual maturity of our held-to-maturity investments are as follows:
| June 30, 2024
(in thousands) | Amortized cost | Fair value
Due in one year or less | $ | 26,153 |  | $ | 25,810 |
Due after one year through five years | 74,731 |  | 73,005 |
Due after five years through ten years | 6,207 |  | 6,145 |
Due after ten years | 6,177 |  | 6,211 |
Total held-to-maturity investments | $ | 113,268 |  | $ | 111,171 |
Schedule of unrealized gain (loss) on equity investments | Unrealized gains and losses related to investments still held at June 30, 2024 and June 25, 2023, which are included in SG&A expense on our Consolidated Statements of Operations and Comprehensive Income (Loss), were as follows:
| Thirteen weeks ended |  | Twenty-six weeks ended
(in thousands) | June 30, 2024 | June 25, 2023 |  | June 30, 2024 | June 25, 2023
Unrealized gains (losses) | $ | 303 |  | $ | 1,558 |  |  | $ | 2,722 |  | $ | 1,975 |

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