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LEASE - Total leases - Summary (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Leases |  |
Short-term | $ 37,091 | $ 44,765
Long-term | 15,602 | 33,794
Total lease liabilities | 52,693 | 78,559
Operating lease liabilities, current | 15,204 | 18,767
Operating lease liabilities, noncurrent | 13,232 | 20,718
Total operating lease liabilities | 28,436 | 39,485
Finance lease liabilities, current | 21,887 | 25,998
Finance lease liabilities, noncurrent | 2,370 | 13,076
Total Finance lease liabilities | $ 24,257 | $ 39,074

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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