Commitments and Contingencies - Agreements and Investments (Details) $ in Thousands	Sep. 03, 2014 aircraft	Dec. 22, 2011	Dec. 20, 2011 aircraft	Dec. 31, 2015 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Investment management agreement duration		5 years
Percentage of interest acquired in aircraft	6.25%		12.50%
Number of aircraft interest acquired in | aircraft	1		2
Duration aircraft acquired for	5 years		5 years
Unfunded capital commitments				$ 11,400
Management Fee Commitment
Other Commitments [Line Items]
2016				699
2017				24
2018				0
2019				0
2020				0
Total				$ 723