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Related party transactions (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Related Party Transaction [Line Items] |  |  |  |  |
Management fees | $ 346 | $ 646 | $ 759 | $ 1,389 |
Dividends | 49 | 433 | 94 | 691 |
AerDragon |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Dividends | 0 | 0 | 0 | 0 |
ACSAL |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Dividends | 49 | 236 | 94 | 494 |
AerLift |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Dividends | 0 | 197 | 0 | 197 |
Norwegian Air Shuttle ASA |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Percent of annual lease revenue attributable to NAS |  |  |  |  | 3.40%
Management fees | AerDragon |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Management fees | 131 | 147 | 267 | 380 |
Management fees | ACSAL |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Management fees | 120 | 120 | 240 | 240 |
Management fees | AerLift |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Management fees | $ 95 | $ 379 | $ 252 | $ 769 |

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