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Intangibles - Finite-lived intangible assets (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
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Maintenance rights |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, net | $ 2,815,514 | $ 3,292,007
Lease premium, net |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, net | 962,361 | 1,152,513
Maintenance rights and lease premium, net |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets, net | $ 3,777,875 | $ 4,444,520

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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 926 -SubTopic 20 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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