Receivable from and Payable to Brokers, Dealers and Clearing Organizations (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Receivable from brokers, dealers and clearing organizations consist of:
Securities borrowed	$ 224,672	$ 242,172
Receivable from brokers	49,458	38,149
Securities failed to deliver	7,799	11,055
Clearing organizations	25,030	21,106
Other	53,954	1,993
Receivables from broker, dealers and clearing organizations	360,913	314,475
Payable to brokers, dealers and clearing organizations consist of:
Securities loaned	130,658	137,892
Payable to brokers	3,316	4,559
Securities failed to receive	21,513	23,573
Other	9,059	91,137
Payable to brokers, dealers and clearing organizations	$ 164,546	$ 257,161