Receivables from and Payables To Brokers, Dealers, and Clearing Organizations (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Receivables from and Payables To Brokers, Dealers, and Clearing Organizations
Deposits with clearing organizations	$ 7,056,000	$ 9,566,000
Receivable from clearing organizations	2,117,000	2,001,000
Underwriting and syndicate fees receivable		1,020,000
Receivable for unsettled trading activities		237,000
Total receivables	9,173,000	12,824,000
Payable to clearing organizations		638,009,000
Total payables		638,009,000
Deposit with FICC	6,300,000	8,800,000
Excess equity held at the entity's principal clearing broker		$ 35,500,000