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Bank Deposits (Scheduled Maturities Of Certificates Of Deposit) (Details) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Certificates of deposit $ 630,000 $ 1,970,000
Deposits of related parties 3,300,000,000 2,100,000,000
Certificates Of Deposit, Less Than $100 [Member]
   
Within one year 182,000 794,000
One to three years 203,000 240,000
Over three years     
Certificates of deposit 385,000 1,034,000
Certificates Of Deposit, $100 And Greater [Member]
   
Within one year 245,000 656,000
One to three years    280,000
Over three years     
Certificates of deposit 245,000 936,000
Stifel Nicolaus [Member]
   
Interest bearing and time deposits of executive officers, directors, and affiliates $ 200,000 $ 600,000