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LONG-TERM DEBT AND CREDIT FACILITY - Schedule of Long Term Debt (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Sep. 23, 2020 | May 12, 2020 | Jun. 27, 2019
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Disclosure of detailed information about borrowings [line items] |  |  |  |  |
Borrowings | $ 464.4 | $ 466.6 |  |  |
Current portion of long-term debt | 7.5 | 7.9 |  |  |
Non-current portion of long-term debt | 456.9 | 458.7 |  |  |
5.75% senior notes |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |
Borrowings | $ 445.7 | $ 438.6 |  |  |
5.75% senior notes | Fixed interest rate |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |
Interest rate | 5.75% | 5.75% | 5.75% |  |
Equipment loans |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |
Interest rate |  |  |  | 5.95% | 5.23%
Borrowings | $ 18.7 | $ 28.0 |  |  |

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