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Supplementary Cash Flow Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Increase (Decrease) in Operating Capital [Abstract] |  |  |
Accounts receivable | $ (4,724) | $ (702) | $ (2,569)
Prepaids and other receivables | (5,300) | (10,509) | (2,382)
Current portion of loans receivable | 0 | (4,585) | 0
Inventory | (28,094) | (51,888) | (4,092)
Accounts payable and other liabilities | 4,175 | 13,476 | 12,705
Total | $ (33,943) | $ (54,208) | $ 3,662

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- Definition Amount of increase (decrease) in obligations incurred but not paid, and operating obligations classified as other. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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