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LONG-TERM OBLIGATIONS (Tables) | 12 Months Ended
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Dec. 31, 2023
Debt Disclosure [Abstract] |
Schedule of Long-term Debt Instruments | Long-term debt is summarized as follows (in millions):
| December 31,
| 2023 |  | 2022
5% Senior Notes due May 15, 2029, net of unamortized debt issuance costs of $5.0 and $6.0 million at December 31, 2023 and 2022, respectively | $ | 595.0 |  |  | $ | 594.0 |
Credit Agreement - revolving line of credit expires on April 1, 2026 | — |  |  | 177.0 |
Secured borrowings | 19.0 |  |  | — |
Finance lease obligations | 8.7 |  |  | 4.2 |
Other | 0.5 |  |  | 0.3 |
Total debt | 623.2 |  |  | 775.5 |
Less: Current portion of long-term debt | (2.8) |  |  | (1.9) |
Long-term debt, less current portion | $ | 620.4 |  |  | $ | 773.6 |
Schedule of Debt | Letters of credit outstanding (in millions):
| December 31, 2023 |  | December 31, 2022
$400 Million Facility | $ | — |  |  |  |  |  |  | $ | — |  |  |  |  |
$300 Million Facility | 71.8 |  |  |  |  |  |  | 70.4 |  |  |  |  |
Bilateral Arrangements | 48.1 |  |  |  |  |  |  | 48.0 |  |  |  |  |
Total | $ | 119.9 |  |  |  |  |  |  | $ | 118.4 |  |  |  |  |
Schedule of Maturities of Long-term Debt | Amounts shown are exclusive of minimum lease payments for capital lease obligations and secured borrowings (in millions):
2024 | $ | 0.2 |
2025 | 0.1 |
2026 | 0.1 |
2027 | 0.1 |
2028 | — |
Thereafter | 600.0 |
Total Debt | 600.5 |
Less: Unamortized debt issuance costs | (5.0) |
Net debt | $ | 595.5 |
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments | The Company estimates the fair value of its debt set forth below as of December 31, 2023 and 2022, as follows (in millions, except for quotes):
2023 | Book Value |  | Quote |  | Fair Value
5% Notes | $ | 600.0 |  |  | 0.94375 |  |  | $ | 566.3 |
2022 | Book Value |  | Quote |  | Fair Value
5% Notes | $ | 600.0 |  |  | 0.89250 |  |  | $ | 535.5 |

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