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Investment in finance and sales-type leases, net (Components of net investment) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Flight Equipment, Net [Abstract] |  |
Future minimum lease payments to be received | $ 608,950 | $ 715,085
Estimated residual values of leased flight equipment | 589,872 | 577,353
Less: Unearned income | (260,708) | (280,889)
Allowance for credit losses (Note 23) | (59,663) | 0
Net investment in finance and sales-type leases | $ 878,451 | $ 1,011,549

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- Definition Amount of net investment in sales-type and direct financing lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121561866&loc=SL77919306-209978 + Details
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- Definition Amount of allowance for credit loss on net investment in sales-type and direct financing leases. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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