Investments (Details) $ in Thousands	1 Months Ended		3 Months Ended	9 Months Ended		46 Months Ended
	Oct. 31, 2014 USD ($)	Jun. 30, 2011 engine	Sep. 30, 2015 USD ($) engine	Sep. 30, 2015 USD ($) engine	Sep. 30, 2014 USD ($)	Mar. 31, 2015 USD ($) engine	Dec. 31, 2014 USD ($)	Jun. 03, 2014	May. 25, 2011 USD ($)
Investments
Investment in joint venture			$ 41,740	$ 41,740			$ 41,590
Capital contribution to joint ventures				(630)	$ (2,623)
Gain On Sale Of Engines				7,200
Distributions				1,303
Foreign currency translation adjustment			(304)	(304)
WMES
Investments
Ownership interest (as a percent)						50.00%
Initial capital contribution									$ 8,000
Number of engines transferred to the joint venture | engine		7
Additional capital contributions				2,100
Capital Contribution Offset				3,600
Number of engines purchased | engine						21
Capital contributions to date			29,000	29,000		$ 21,000
Net Investment In Joint Venture				25,400
Investment in joint venture			$ 27,051	27,051			26,672
Number of engines in lease portfolio | engine			28
Capital contribution to joint ventures				$ (630)
Percent Of Gain Related To Sale Of Engines				50.00%
Reduction of investment				$ 3,600
Distributions				$ 1,303
Number of Engines Sold | engine				7
CASC
Investments
Ownership interest (as a percent)								50.00%
Investment in joint venture			$ 14,689	$ 14,689			$ 14,918
Capital contribution to joint ventures	$ 15,000
Foreign currency translation adjustment				$ (304)