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SUPPLEMENTAL CASH FLOW INFORMATION - Operating Assets and Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Decrease (increase) in operating assets: |  |  |
Trade and other receivables | $ (38,138) | $ 5,132 | $ (44,465)
Inventories | (20,848) | (21,660) | (11,368)
Other operating assets | (1,516) | 17,781 | 1,375
Increase (decrease) in operating liabilities: |  |  |
Accounts payable | (6,882) | 7,761 | 16,732
Accrued liabilities | 38,761 | (1,574) | (401)
Reclamation liabilities | (243) | (2,447) | (3,568)
Other operating liabilities | (429) | (45,585) | (24,474)
Net change in operating assets and liabilities | $ (29,295) | $ (40,592) | $ (66,169)

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- Definition The increase (decrease) during the reporting period in the amount due from customers for the credit sale of goods and services; includes accounts receivable and other types of receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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