Bank Deposits (Scheduled Maturities Of Certificates Of Deposit) (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Certificates of deposit	$ 633,000	$ 630,000
Deposits of related parties	3,500,000,000	3,300,000,000
Certificates Of Deposit, Less Than $100 [Member]
Within one year	183,000	182,000
One to three years	204,000	203,000
Over three years
Certificates of deposit	387,000	385,000
Certificates Of Deposit, $100 And Greater [Member]
Within one year	246,000	245,000
One to three years
Over three years
Certificates of deposit	246,000	245,000
Stifel Nicolaus [Member]
Interest bearing and time deposits of executive officers, directors, and affiliates	$ 100,000	$ 200,000