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Concentration of Risk (Tables) - Geographic Region

12 Months Ended

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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