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v3.20.4

Summary of significant accounting policies (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) segment | Dec. 31, 2019 USD ($) | Jan. 01, 2020 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |
Cash accounting | $ (4,321,006) | $ (4,682,266) |
Number of operating segments | segment | 1 |  |
Number of reportable segments | segment | 1 |  |
Allowance for credit loss | $ 67,153 | 0 |
Decrease to retained earnings | (7,399,703) | (7,734,609) |
Basic lease rents |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Cash accounting | (3,761,611) | (4,281,260) |
Basic lease rents | Cash accounting |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Cash accounting | $ 310,600 |  |
Cumulative effect due to adoption of new accounting standard |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Allowance for credit loss |  | $ 30,264 | $ 30,300
Decrease to retained earnings |  |  | $ 25,800
Flight Equipment |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful life of asset, years | 25 years |  |
Percentage of estimates for residual values of original manufacture cost | 15.00% |  |

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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599 + Details
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