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Intangibles (Tables) | 12 Months Ended
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Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items] |
Schedule of movements in maintenance rights intangible | Movements in maintenance rights during the years ended December 31, 2020 and 2019 were as follows:
| Year Ended December 31,
| 2020 |  | 2019
Maintenance rights at beginning of period | $ | 794,798 |  |  | $ | 1,088,246 |
EOL and MR contract maintenance rights expense | (45,655) |  |  | (76,611) |
MR contract maintenance rights write-off due to maintenance liability release | (35,897) |  |  | (19,848) |
EOL contract maintenance rights write-off due to cash receipt | (51,463) |  |  | (148,289) |
EOL and MR contract maintenance rights write-off due to sale of aircraft and impairment | (18,958) |  |  | (48,700) |
Maintenance rights at end of period | $ | 642,825 |  |  | $ | 794,798 |
Schedule of other intangibles | Other intangibles Other intangibles consisted of the following as of December 31, 2020 and 2019:
| As of December 31,
| 2020 |  | 2019
Goodwill (Note 22) | $ | — |  |  | $ | 58,094 |
Customer relationships, net | 219,589 |  |  | 240,765 |
Contractual vendor intangible assets | 5,045 |  |  | 8,535 |
| $ | 224,634 |  |  | $ | 307,394 |
Maintenance Rights Intangible And Lease Premium, Net |
Finite-Lived Intangible Assets [Line Items] |
Schedule of maintenance rights and lease premiums | Maintenance rights and lease premium, net consisted of the following as of December 31, 2020 and 2019:
| As of December 31,
| 2020 |  | 2019
Maintenance rights | $ | 642,825 |  |  | $ | 794,798 |
Lease premium, net | 7,089 |  |  | 14,817 |
| $ | 649,914 |  |  | $ | 809,615 |
Customer Relationships And Other Intangible Assets |
Finite-Lived Intangible Assets [Line Items] |
Schedule of maintenance rights and lease premiums | The following tables present details of customer relationships and related accumulated amortization as of December 31, 2020 and 2019:
| As of December 31, 2020
| Gross carrying amount |  | Accumulated amortization |  | Net carrying amount
Customer relationships | $ | 360,000 |  |  | $ | (140,411) |  |  | $ | 219,589 |
| As of December 31, 2019
| Gross carrying amount |  | Accumulated amortization |  | Net carrying amount
Customer relationships | $ | 360,000 |  |  | $ | (119,235) |  |  | $ | 240,765 |

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- Definition Tabular disclosure of the characteristics, including initial carrying value, residual amount, weighted average useful life, of finite-lived intangible assets acquired during the period by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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