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DEBT (Tables) | 12 Months Ended
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Dec. 31, 2021
DEBT |
Schedule of debt | At December 31, 2021 and 2020, the Company’s debt consisted of the following:
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31,
(In millions) |  | 2021 |  | 2020
Private Placement Term Loans: | ​ | ​ | ​ | ​ | ​ | ​
3.66 %, payable through 2023 | ​ | $ | 13.7 | ​ | $ | 22.8
4.16 %, payable through 2027 | ​ |  | 28.8 | ​ |  | 34.0
3.37 %, payable through 2027 | ​ | ​ | 69.2 | ​ | ​ | 75.0
3.14 %, payable through 2031 | ​ | ​ | 151.2 | ​ | ​ | 169.6
4.31 %, payable through 2032 | ​ |  | 25.4 | ​ |  | 27.9
Title XI Debt: | ​ | ​ | ​ | ​ | ​ | ​
5.34 %, payable through 2028 | ​ |  | 15.4 | ​ |  | 17.6
5.27 %, payable through 2029 | ​ |  | 17.6 | ​ |  | 19.8
1.22 %, payable through 2043 | ​ | ​ | 174.1 | ​ | ​ | 182.0
1.35 %, payable through 2044 | ​ | ​ | 133.6 | ​ | ​ | 139.6
Revolving credit facility, maturity date of March 31, 2026 | ​ |  | — | ​ |  | 71.8
Total Debt | ​ |  | 629.0 | ​ |  | 760.1
Less: Current portion | ​ |  | (65.0) | ​ |  | (59.2)
Total Long-term Debt | ​ | ​ | 564.0 | ​ | ​ | 700.9
Less: Deferred loan fees | ​ | ​ | (14.3) | ​ | ​ | (15.3)
Total Long-term Debt, net of deferred loan fees | ​ | $ | 549.7 | ​ | $ | 685.6
Schedule of maturities of debt | ​
​ | ​ | ​ | ​
​ | ​ | As of
Year (in millions) |  | December 31, 2021
2022 | ​ | $ | 65.0
2023 | ​ |  | 60.4
2024 | ​ |  | 51.7
2025 | ​ |  | 51.7
2026 | ​ |  | 51.7
Thereafter | ​ |  | 348.5
Total Debt | ​ | $ | 629.0
Schedule of deferred loan fees | ​
​ | ​ | ​ | ​
Deferred Loan Fees (in millions) |  | Amount
Deferred financing costs related to Title XI bonds and private placement debt amendments | ​ | $ | 16.0
Deferred fees expensed related to the redemption of private placement debt | ​ | ​ | (0.2)
Amortization expense for the year ended December 31, 2021 | ​ |  | (1.5)
Balance at December 31, 2021 | ​ | $ | 14.3
Schedule of estimated amortization expense relating to deferred laon fees | ​
​ | ​ | ​ | ​
Year (in millions) |  | Amount
2022 | ​ | $ | 1.3
2023 | ​ |  | 1.3
2024 | ​ |  | 1.2
2025 | ​ |  | 1.2
2026 | ​ |  | 1.0
Thereafter | ​ |  | 8.3
Total amortization expense of deferred loan fees | ​ | $ | 14.3

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