Bank Deposits (Scheduled Maturities Of Certificates Of Deposit) (Details) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Certificates of deposit	$ 1,590,000	$ 1,970,000
Deposits of related parties	2,300,000,000	2,100,000,000
Certificates Of Deposit, $100 And Greater [Member]
Certificates of deposit	803,000	936,000
Within one year	521,000	656,000
One to three years	282,000	280,000
Certificates Of Deposit, Less Than $100 [Member]
Certificates of deposit	787,000	1,034,000
Within one year	546,000	794,000
One to three years	$ 241,000	$ 240,000