Bank Loans (Schedule Of The Allowances For Loan Losses By Type) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Allowance for loan losses	$ 13,233	$ 8,145
Percentage of loan allowance losses	100.00%	100.00%
Commercial And Industrial [Member]
Allowance for loan losses	10,344	5,450
Percentage of loan allowance losses	44.70%	36.40%
Residential Real Estate [Member]
Allowance for loan losses	735	647
Percentage of loan allowance losses	45.50%	51.60%
Commercial Real Estate [Member]
Allowance for loan losses	578	408
Percentage of loan allowance losses	7.00%	8.00%
Consumer [Member]
Allowance for loan losses	202	691
Percentage of loan allowance losses	1.20%	1.50%
Home Equity Lines Of Credit [Member]
Allowance for loan losses	159	195
Percentage of loan allowance losses	1.60%	2.40%
Construction And Land [Member]
Allowance for loan losses	12	13
Percentage of loan allowance losses	0.00%	0.10%
Unallocated [Member]
Allowance for loan losses	$ 1,203	$ 741