Other Assets - Components of Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid expenses	$ 4,295	$ 3,076
Investments in merchant banking funds	1,689	2,881
Rent deposits	1,517	1,471
Other tangible assets	540	200
Intangible assets	300	775
Total other assets	$ 8,341	$ 8,403