Related Parties (Details) - USD ($)	1 Months Ended		3 Months Ended
	Apr. 30, 2017	Feb. 28, 2017	Mar. 31, 2016	Mar. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Subordinated Borrowings				$ 10,550,000	$ 16,550,000
Subordinated Debt [Member]
Related Party Transaction [Line Items]
Extinguishment of Debt, Amount		$ 6,000,000
Subsequent Event [Member] | Subordinated Debt [Member]
Related Party Transaction [Line Items]
Extinguishment of Debt, Amount	$ 3,751,000
Other Assets [Member]
Related Party Transaction [Line Items]
Due from Related Parties, Noncurrent				$ 15,563,000	$ 17,862,000
Investment Management [Member] | Private Equity Fund [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties			$ 2,394,000