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Net investment in finance and sales-type leases (Components of net investment) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 USD ($) lease | Dec. 31, 2017 USD ($)
Flight Equipment, Net [Abstract] |  |  |
Future minimum lease payments to be received | $ 708,934 |  | $ 865,456
Estimated residual values of leased flight equipment (unguaranteed) | 321,739 |  | 498,894
Less: Unearned income | (274,791) |  | (368,661)
Net investment in finance and sales-type leases, before allowance for credit losses | 755,882 |  | 995,689
Less: Allowance for credit losses | 0 | [1] | 0
Net investment in finance and sales-type leases | $ 755,882 |  | $ 995,689
Number of finance leases, written off for credit losses | lease | 4 |  |
Provision for credit losses on finance leases | $ 11,100 |  |
[1] | During the year ended December 31, 2016, we recognized a direct write-off for credit losses on four finance leases of $11.1 million, which was recorded in leasing expenses in our Consolidated Income Statement.

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- Definition Capital Leases Net Investment In Direct Financing Leases Before Allowance For Credit Losses + References No definition available. + Details
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- Definition Number Of Finance Leases, Written Off For Credit Losses + References No definition available. + Details
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- Definition The net investment in direct financing leases as of the balance sheet date consisting of: (a) minimum lease payments due on direct financing leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition The estimate of contractual payments on direct financing leases that are probable of not being collected as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1)(ii) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition The remaining (unamortized) difference between the gross investment in a direct financing lease and the cost or carrying amount, if different, of the leased property as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition Amount of remaining payments as of the balance sheet date that lessees are obligated to make or can be required to make under direct financing leases, including any guarantee of residual value and executory costs. The amount also includes any guaranteed rental payments by an unrelated third-party provided that are financially capable of making such payments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- Definition The estimate of the lease property's economic value at the end of the direct financing lease term excluding any amounts guaranteed by either the lessee or a third-party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738 + Details
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- References No definition available. + Details
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- Definition Amount of expense related to estimated loss to be realized from lease transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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