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Long-Term Notes (Details) $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Feb. 05, 2020 CAD ($) | Dec. 31, 2021 CAD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CAD ($) | Dec. 31, 2021 USD ($) | Feb. 05, 2020 USD ($)
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Long-term notes |  | $ 874,527 |  | $ 1,132,868 |  |
Repurchased and cancelled principal notes |  | 251,969 |  | 833,672 |  |
Early redemption expense |  | 4,858 |  | 6,617 |  |
Net proceeds from issuance of long-term notes | $ 652,200 | 0 |  | 652,150 |  |
Principal |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Long-term notes |  | 885,920 |  | 1,147,950 |  |
Loan repayments |  | 249,400 |  |  |  |
Changes in reported amount of U.S. denominated debt |  | 12,600 |  |  |  |
Unamortized debt issuance costs |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Long-term notes |  | (11,393) |  | (15,082) |  |
5.625% notes due June 1, 2024 |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Notional amount |  |  |  |  | $ 200,000,000 | $ 200,000,000
Repurchased and cancelled principal notes |  |  | $ 200,000,000 |  |  |
Early redemption expense |  | $ 1,900 |  |  |  |
5.625% notes due June 1, 2024 | Fixed interest rate |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings, interest rate |  | 5.625% |  |  | 5.625% | 5.625%
5.625% notes due June 1, 2024 | Principal |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Long-term notes |  | $ 253,120 |  | 510,200 |  |
8.75% Notes Due April 1, 2027 |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Notional amount |  |  |  |  | $ 500,000,000 | $ 500,000,000
Transaction costs | $ 12,500 |  |  |  |  |
8.75% Notes Due April 1, 2027 | Fixed interest rate |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Borrowings, interest rate |  | 8.75% |  |  | 8.75% | 8.75%
8.75% Notes Due April 1, 2027 | Principal |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |
Long-term notes |  | $ 632,800 |  | $ 637,750 |  |

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