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Net investment in finance and sales-type leases (Components of net investment) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Flight Equipment, Net [Abstract]
Future minimum lease payments to be received	$ 667,765	$ 715,085
Estimated residual values of leased flight equipment	588,791	577,353
Less: Unearned income	(257,270)	(280,889)
Allowance for credit losses	(56,273)	0
Net investment in finance and sales-type leases	$ 943,013	$ 1,011,549

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- Definition

Sales-type and Direct Financing Leases, Deferred Selling Profit

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- Definition

Sales-type and Direct Financing Leases, Lease Receivable, Future Minimum Lease Payments

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- Definition

Sales-type and Direct Financing Leases, Unguaranteed Residual Asset

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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

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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

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