Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Amounts Payable To Brokers, Dealers, And Clearing Organizations) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Receivables From And Payables To Brokers, Dealers And Clearing Organizations [Abstract]
Deposits received for securities loaned	$ 4,215	$ 40,101
Securities failed to receive	7,365	7,411
Payable to clearing organizations	2,443	10,623
Payables to broker, dealers and clearing organizations, Total	$ 14,023	$ 58,135