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Concentration of Risk (Tables) - Geographic Region | 12 Months Ended
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Dec. 31, 2019
Net book value of aircraft portfolio |
Concentration of risk |
Schedule of concentration of risk by regions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2019 | ​ | December 31, 2018 |
​ |  | Net Book |  | ​ |  | Net Book |  | ​ |
Region | ​ | Value | ​ | % of Total | ​ | Value(1) | ​ | % of Total |
​ | ​ | (in thousands, except percentages) |
Europe | ​ | $ | 5,438,775 | ​ | 29.0 | % | $ | 4,692,341 | ​ | 29.9 | %
Asia (excluding China) | ​ | ​ | 4,985,525 | ​ | 26.7 | % | ​ | 3,846,785 | ​ | 24.5 | %
China | ​ |  | 2,930,752 | ​ | 15.7 | % |  | 2,663,903 | ​ | 17.0 | %
The Middle East and Africa | ​ |  | 2,242,215 | ​ | 12.0 | % |  | 1,952,900 | ​ | 12.4 | %
Central America, South America, and Mexico | ​ |  | 1,116,814 | ​ | 6.0 | % |  | 1,078,900 | ​ | 6.9 | %
U.S. and Canada | ​ |  | 996,398 | ​ | 5.3 | % |  | 757,884 | ​ | 4.8 | %
Pacific, Australia, and New Zealand | ​ |  | 993,858 | ​ | 5.3 | % |  | 714,397 | ​ | 4.5 | %
Total | ​ | $ | 18,704,337 | ​ | 100.0 | % | $ | 15,707,110 | ​ | 100.0 | %
(1) | As of December 31, 2018, we had six aircraft held for sale with a carrying value of $241.6 million included in the table above.
Number of customers |
Concentration of risk |
Schedule of concentration of risk by regions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2019 | ​ | December 31, 2018 | ​
​ |  | Number of |  | ​ |  | Number of |  | ​ |
Region | ​ | Customers(1) | ​ | % of Total | ​ | Customers(1) | ​ | % of Total | ​
Europe |  | 43 |  | 40.6 | % | 33 |  | 35.1 | %
Asia (excluding China) |  | 19 |  | 17.9 | % | 18 |  | 19.1 | %
The Middle East and Africa | ​ | 13 | ​ | 12.3 | % | 11 | ​ | 11.8 | %
U.S. and Canada |  | 10 |  | 9.4 | % | 10 |  | 10.6 | %
Central America, South America, and Mexico |  | 9 |  | 8.5 | % | 10 |  | 10.6 | %
China |  | 9 |  | 8.5 | % | 9 |  | 9.6 | %
Pacific, Australia, and New Zealand |  | 3 |  | 2.8 | % | 3 |  | 3.2 | %
Total |  | 106 |  | 100.0 | % | 94 |  | 100.0 | %
(1) | A customer is an airline with its own operating certificate.
Flight equipment revenue |
Concentration of risk |
Schedule of rental revenue and percentage of rental flight equipment revenues | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended | ​ | Year Ended | ​ | Year Ended |
​ | ​ | December 31, 2019 | ​ | December 31, 2018 | ​ | December 31, 2017 |
​ |  | Amount of |  | ​ |  | Amount of |  | ​ |  | Amount of |  | ​ |
​ | ​ | Rental | ​ | ​ | ​ | Rental | ​ | ​ | ​ | Rental | ​ | ​ |
Region | ​ | Revenue | ​ | % of Total | ​ | Revenue | ​ | % of Total | ​ | Revenue | ​ | % of Total |
​ |  | ​ | (in thousands, except percentages) | ​
Europe | ​ | $ | 531,778 | ​ | 27.7 | % | $ | 476,515 | ​ | 29.2 | % | $ | 450,628 | ​ | 31.1 | %
Asia (excluding China) | ​ |  | 484,017 | ​ | 25.3 | % |  | 412,465 | ​ | 25.3 | % |  | 332,284 | ​ | 22.9 | %
China | ​ | ​ | 357,278 | ​ | 18.6 | % | ​ | 329,977 | ​ | 20.2 | % | ​ | 324,147 | ​ | 22.3 | %
The Middle East and Africa | ​ |  | 226,932 | ​ | 11.8 | % |  | 179,497 | ​ | 11.0 | % |  | 116,799 | ​ | 8.1 | %
Central America, South America, and Mexico | ​ |  | 124,850 | ​ | 6.6 | % |  | 108,736 | ​ | 6.7 | % |  | 102,205 | ​ | 7.0 | %
U.S. and Canada | ​ |  | 98,627 | ​ | 5.1 | % |  | 77,678 | ​ | 4.8 | % |  | 76,685 | ​ | 5.3 | %
Pacific, Australia, and New Zealand | ​ |  | 93,387 | ​ | 4.9 | % |  | 46,332 | ​ | 2.8 | % |  | 47,987 | ​ | 3.3 | %
Total | ​ | $ | 1,916,869 | ​ | 100.0 | % | $ | 1,631,200 | ​ | 100.0 | % | $ | 1,450,735 | ​ | 100.0 | %

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