Lease Rental Revenues and Flight Equipment Held for Lease (Tables)

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Annual future minimum lease rentals receivable

Minimum future annual lease rentals contracted to be received under our existing operating leases of flight equipment at December 31, 2017 were as follows:

Year Ended December 31,	Amount
2018	$	722,081
2019	634,922
2020	519,345
2021	406,349
2022	317,708
Thereafter	664,430
Total	$	3,264,835

Geographic concentration of lease rental revenue earnings

Geographic concentration of lease rental revenue earned from flight equipment held for lease was as follows:

	Year Ended December 31,
Region	2017		2016		2015
Asia and Pacific	37	%	40	%	42	%
Europe	24	%	23	%	28	%
Middle East and Africa	12	%	12	%	9	%
North America	8	%	6	%	5	%
South America	19	%	19	%	16	%
Total	100	%	100	%	100	%

Revenue attributable to individual countries

The following table shows the number of lessees with lease rental revenue of at least 5% and their combined total percentage of lease rental revenue for the years indicated:

Year Ended December 31,	2017			2016			2015
	Number of Lessees	Combined % of Lease Rental Revenue		Number of Lessees	Combined % of Lease Rental Revenue		Number of Lessees	Combined % of Lease Rental Revenue
Largest lessees by lease rental revenue	4	24	%	4	25	%	3	17	%

The following table sets forth revenue attributable to individual countries representing at least 10% of total revenue (including maintenance revenue) in any year based on each lessee’s principal place of business for the years indicated:

Year Ended December 31,	2017				2016				2015
Country	Revenue		% of Total Revenue		Revenue		% of Total Revenue		Revenue		% of Total Revenue
Indonesia(1)	$	—	—	%	$	83,087	11	%	$	—	—	%

 ______________

(1) Total revenue attributable to Indonesia was less than 10% for the years ended December 31, 2017 and 2015.

Geographic concentration of net book value of flight equipment held for lease

Geographic concentration of net book value of flight equipment (including flight equipment held for lease and net investment in finance and sales-type leases, or “net book value”) was as follows:

	December 31, 2017				December 31, 2016
Region	Number of Aircraft		Net Book Value %		Number of Aircraft		Net Book Value %
Asia and Pacific	59		30	%	61		38	%
Europe	92		32	%	66		23	%
Middle East and Africa	15		9	%	14		11	%
North America	32		10	%	26		8	%
South America	25		19	%	23		18	%
Off-lease	1	(1)	—	%	3	(2)	2	%
Total	224		100	%	193		100	%

______________

(1) Consisted of one Airbus A321-200 aircraft, which is subject to a commitment to lease.

(2) Consisted of one Airbus A330-200 aircraft, which was delivered on lease to a customer in February 2017, and two Airbus A321-200 aircraft that were delivered to a customer in Europe in the second quarter of 2017.