Bank Loans (Schedule Of The Allowances For Loan Losses By Type) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Allowance for loan losses	$ 14,131	$ 12,668
Percentage of loan allowance losses	100.00%	100.00%
Commercial And Industrial [Member]
Allowance for loan losses	11,089	9,832
Percentage of loan allowance losses	40.10%	37.70%
Residential Real Estate [Member]
Allowance for loan losses	800	892
Percentage of loan allowance losses	34.30%	34.80%
Commercial Real Estate [Member]
Allowance for loan losses	473	408
Percentage of loan allowance losses	23.80%	25.50%
Consumer [Member]
Allowance for loan losses	194	198
Percentage of loan allowance losses	0.80%	0.80%
Home Equity Lines Of Credit [Member]
Allowance for loan losses	290	174
Percentage of loan allowance losses	1.00%	1.10%
Construction And Land [Member]
Allowance for loan losses		12
Percentage of loan allowance losses	0.00%	0.10%
Unallocated [Member]
Allowance for loan losses	$ 1,285	$ 1,152