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Supplemental cash flow information - Reconciliation of Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Changes from financing cash flows |  |
Repayment of long-term debt and financing fees | $ (295,917) | $ (388,216)
Net proceeds on issue of long-term debt | 865,415 | 695,533
Draw on revolving credit facility | 300,000 | 0
Repayment of revolving credit facility | (300,000) | 0
Payment of lease obligations | (106,834) | (101,812)
Proceeds from limited recourse debt | 12,839 | 0
Long term debt |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |
Outstanding at beginning of period | 1,768,853 |
Changes from financing cash flows |  |
Repayment of long-term debt and financing fees | (289,698) |
Net proceeds on issue of long-term debt | 865,415 |
Draw on revolving credit facility | 300,000 |
Repayment of revolving credit facility | (300,000) |
Payment of lease obligations | 0 |
Proceeds from limited recourse debt | 12,839 |
Total changes from financing cash flows | 588,556 |
Liability-related other changes |  |
Finance costs | 2,562 |
New lease obligations | 0 |
Other | 3,401 |
Total liability-related other changes | 5,963 |
Outstanding at end of period | 2,363,372 | 1,768,853
Lease obligations |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |
Outstanding at beginning of period | 718,505 |
Changes from financing cash flows |  |
Repayment of long-term debt and financing fees | 0 |
Net proceeds on issue of long-term debt | 0 |
Draw on revolving credit facility | 0 |
Repayment of revolving credit facility | 0 |
Payment of lease obligations | (106,834) |
Proceeds from limited recourse debt |  |
Total changes from financing cash flows | (106,834) |
Liability-related other changes |  |
Finance costs | 0 |
New lease obligations | 108,763 |
Other | 1,800 |
Total liability-related other changes | 110,563 |
Outstanding at end of period | $ 722,234 | $ 718,505

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- Definition The increase (decrease) in liabilities arising from financing activities. [Refer: Liabilities arising from financing activities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2020-01-01 -Paragraph 44B -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_44B&doctype=Standard -URIDate 2020-01-01 + Details
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