Lease Rental Revenues and Flight Equipment Held for Lease (Details 1) - Lease Revenue - Geographic Concentration Risk	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic concentration	100.00%	100.00%	100.00%
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic concentration	24.00%	23.00%	28.00%
Asia and Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic concentration	37.00%	40.00%	42.00%
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic concentration	8.00%	6.00%	5.00%
Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic concentration	12.00%	12.00%	16.00%
South America
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of geographic concentration	19.00%	19.00%	9.00%