Bank Loans (Schedule Of The Allowances For Loan Losses By Type) (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Allowance for loan losses	$ 6,292.0	$ 5,300.0
Percentage of loan allowance losses	100.00%	100.00%
Commercial And Industrial [Member]
Allowance for loan losses	3,370,000	2,595,000
Percentage of loan allowance losses	34.00%	29.30%
Residential Real Estate [Member]
Allowance for loan losses	806,000	510,000
Percentage of loan allowance losses	55.70%	58.20%
Commercial Real Estate [Member]
Allowance for loan losses	560,000	633,000
Percentage of loan allowance losses	0.30%	0.50%
Consumer [Member]
Allowance for loan losses	507,000	679,000
Percentage of loan allowance losses	6.80%	8.10%
Unallocated [Member]
Allowance for loan losses	$ 1,049,000	$ 883,000
Percentage of loan allowance losses	3.20%	3.90%