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DEBT (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2020
DEBT |
Schedule of debt | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31, | ​
(In millions) |  | 2020 |  | 2019 |
Private Placement Term Loans: | ​ | ​ | ​ | ​ | ​ | ​ | ​
5.79 %, payable through 2020 | ​ | $ | 3.5 | ​ | $ | 3.5 | ​
3.66 %, payable through 2023 | ​ |  | 31.9 | ​ |  | 31.9 | ​
4.16 %, payable through 2027 | ​ |  | 39.3 | ​ |  | 39.3 | ​
3.37 %, payable through 2027 | ​ | ​ | 75.0 | ​ | ​ | 75.0 | ​
3.14 %, payable through 2031 | ​ | ​ | 178.8 | ​ | ​ | 188.0 | ​
4.31 %, payable through 2032 | ​ |  | 30.3 | ​ |  | 30.3 | ​
4.35 %, payable through 2044 | ​ | ​ | 100.0 | ​ | ​ | 100.0 | ​
3.92 %, payable through 2045 | ​ | ​ | 69.5 | ​ | ​ | 69.5 | ​
Title XI Debt: | ​ | ​ | ​ | ​ | ​ | ​ | ​
5.34 %, payable through 2028 | ​ |  | 18.7 | ​ |  | 19.8 | ​
5.27 %, payable through 2029 | ​ |  | 20.9 | ​ |  | 22.0 | ​
Revolving credit facility, maturity date of June 29, 2022 | ​ |  | 357.0 | ​ |  | 379.1 | ​
Total Debt | ​ |  | 924.9 | ​ |  | 958.4 | ​
Less: Current portion | ​ |  | (53.4) | ​ |  | (48.4) | ​
Total Long-term Debt | ​ | $ | 871.5 | ​ | $ | 910.0 | ​
Schedule of maturities of debt | ​
​ | ​ | ​ | ​ | ​
Year (in millions) |  | Total |
2020 | ​ | $ | 37.0 | ​
2021 | ​ |  | 54.2 | ​
2022 | ​ |  | 416.9 | ​
2023 | ​ |  | 59.9 | ​
2024 | ​ |  | 55.8 | ​
Thereafter | ​ |  | 301.1 | ​
Total debt | ​ | $ | 924.9 | ​

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
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