Rental Income (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) aircraft	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Minimum future rentals on non-cancelable operating leases of flight equipment
2017 | $	$ 1,369,756
2018 | $	1,352,780
2019 | $	1,282,894
2020 | $	1,146,189
2021 | $	1,025,333
Thereafter | $	3,211,428
Total | $	9,388,380
Maintenance reserve revenue | $	$ 29,000	$ 34,000	$ 25,200
2018	13
2019	27
2020	28
2021	22
Thereafter	147
Total	237
Airbus A319-100
Minimum future rentals on non-cancelable operating leases of flight equipment
2018	1
2021	2
Total	3
Airbus A320-200
Minimum future rentals on non-cancelable operating leases of flight equipment
2018	4
2019	4
2020	9
2021	7
Thereafter	20
Total	44
Airbus A321-200 neo
Minimum future rentals on non-cancelable operating leases of flight equipment
Thereafter	1
Total	1
Airbus A321-200
Minimum future rentals on non-cancelable operating leases of flight equipment
2018	2
2019	1
2020	1
Thereafter	27
Total	31
Airbus A330-200
Minimum future rentals on non-cancelable operating leases of flight equipment
2019	5
2020	2
Thereafter	10
Total	17
Airbus A330-300
Minimum future rentals on non-cancelable operating leases of flight equipment
2020	1
Thereafter	4
Total	5
Boeing 737-700
Minimum future rentals on non-cancelable operating leases of flight equipment
2018	2
2019	3
2020	1
2021	2
Total	8
Boeing 737-800
Minimum future rentals on non-cancelable operating leases of flight equipment
2018	4
2019	10
2020	11
2021	6
Thereafter	64
Total	95
Boeing 767-300ER
Minimum future rentals on non-cancelable operating leases of flight equipment
2019	1
Total	1
Boeing 777-200ER
Minimum future rentals on non-cancelable operating leases of flight equipment
2020	1
Total	1
Boeing 777-300ER
Minimum future rentals on non-cancelable operating leases of flight equipment
2021	4
Thereafter	18
Total	22
Boeing 787- 9
Minimum future rentals on non-cancelable operating leases of flight equipment
Thereafter	3
Total	3
Embraer E190
Minimum future rentals on non-cancelable operating leases of flight equipment
2019	3
2020	2
2021	1
Total	6