Bank Loans (Schedule Of The Allowances For Loan Losses By Type) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	$ 20,731	$ 12,668
Percentage of loan allowance losses	100.00%	100.00%
Commercial And Industrial [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	16,609	9,538
Percentage of loan allowance losses	42.40%	37.70%
Consumer [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	1,255	892
Percentage of loan allowance losses	35.80%	34.80%
Residential Real Estate [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	787	408
Percentage of loan allowance losses	20.40%	25.50%
Home Equity Lines Of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	267	174
Percentage of loan allowance losses	0.60%	1.10%
Commercial Real Estate [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	232	198
Percentage of loan allowance losses	0.80%	0.80%
Construction And Land [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses		12
Percentage of loan allowance losses	0.00%	0.10%
Qualitative [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	$ 1,581	$ 1,446