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, 2014		Dec. 31, 2013
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	$ 18,996		$ 12,668
Percentage of loan allowance losses	100.00%	[1]	100.00%	[1]
Commercial And Industrial [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	15,545		9,538
Percentage of loan allowance losses	43.50%	[1]	37.70%	[1]
Consumer [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	1,001		892
Percentage of loan allowance losses	33.20%	[1]	34.80%	[1]
Residential Real Estate [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	674		408
Percentage of loan allowance losses	21.80%	[1]	25.50%	[1]
Home Equity Lines Of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	274		174
Percentage of loan allowance losses	0.70%	[1]	1.10%	[1]
Commercial Real Estate [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	239		198
Percentage of loan allowance losses	0.80%	[1]	0.80%	[1]
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%	[1]	0.10%	[1]
Qualitative [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Allowance for loan losses	$ 1,263		$ 1,446

[1] Loan category as a percentage of total loan portfolio.