Lease Rental Revenues and Flight Equipment Held for Lease (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Revenue attributable to individual countries
Revenue	$ 183,231		$ 157,918		$ 357,566		$ 314,508
Maintenance revenue (including contra maintenance revenue of $0 and $0 for the three months ended and $0 and $16,382 for the six months ended June 30, 2013 and 2014, respectively)	36,182		13,185		39,224		30,051
India
Revenue attributable to individual countries
Revenue	25,707	[1],[2]	0	[1],[2]
Number of Lessees	1	[1],[2]	0	[1],[2]
Maintenance revenue (including contra maintenance revenue of $0 and $0 for the three months ended and $0 and $16,382 for the six months ended June 30, 2013 and 2014, respectively)	19,582
China
Revenue attributable to individual countries
Revenue	0	[3]	17,610	[3]	0	[3]	36,913	[3]
Number of Lessees	0	[3]	4	[3]	0	[3]	4	[3]
United States
Revenue attributable to individual countries
Revenue	24,390	[1],[4]	0	[1],[4]	0	[3]	33,002	[3]
Number of Lessees	5	[1],[4]	0	[1],[4]	0	[3]	7	[3]
Maintenance revenue (including contra maintenance revenue of $0 and $0 for the three months ended and $0 and $16,382 for the six months ended June 30, 2013 and 2014, respectively)	$ 5,986
Geographic Concentration Risk | Total Revenue [Member] | India
Revenue attributable to individual countries
Percentage of geographic concentration	11.00%	[1],[2]	0.00%	[1],[2]
Geographic Concentration Risk | Total Revenue [Member] | China
Revenue attributable to individual countries
Percentage of geographic concentration	0.00%	[3]	10.00%	[3]	0.00%	[3]	11.00%	[3]
Geographic Concentration Risk | Total Revenue [Member] | United States
Revenue attributable to individual countries
Percentage of geographic concentration	11.00%	[1],[4]	0.00%	[1],[4]	0.00%	[3]	10.00%	[3]

[1] Total revenue was less than 10% for the three months ended June 30, 2013.

[2] Total revenue for the three months ended June 30, 2014 includes $19,582 of maintenance revenue related to scheduled lease terminations.

[3] Total revenue was less than 10% for the six months ended June 30, 2014.

[4] Total revenue for the three months ended June 30, 2014 includes $5,986 of maintenance revenue related to aircraft impairment.