Bank Deposits (Scheduled Maturities Of Certificates Of Deposit) (Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Certificates of deposit	$ 1,586,000	$ 1,970,000
Deposits of related parties	2,900,000,000	2,100,000,000
Certificates Of Deposit, Less Than $100 [Member]
Within one year	507,000	794,000
One to three years	287,000	240,000
Over three years
Certificates of deposit	794,000	1,034,000
Certificates Of Deposit, $100 And Greater [Member]
Within one year	549,000	656,000
One to three years	243,000	280,000
Over three years
Certificates of deposit	792,000	936,000
Stifel Nicolaus [Member]
Interest bearing and time deposits of executive officers, directors, and affiliates	$ 100,000	$ 600,000