Bank Loans (Schedule Of Balance And Associated Percentage Of Each Major Loan Category In Loan Portfolio) (Details) (USD $)	Mar. 31, 2013		Dec. 31, 2012		Mar. 31, 2012	Dec. 31, 2011
Loans and Leases Receivable, Gross Carrying Amount, Total	$ 897,657,000		$ 823,919,000
Loans and Leases Receivable, Gross Carrying Amount, Total	100.00%		100.00%
Unamortized loan fees, net of origination costs	(1,654,000)		(1,207,000)
Loans in process	50,000		1,370,000
Allowance for loan losses	(9,406,000)		(8,145,000)		(5,781,000)	(5,300,000)
Loans and leases receivable, net reported amount	886,647,000		815,937,000
Securities-based loans	425,900,000		425,300,000
Consumer [Member]
Loans and Leases Receivable, Gross Carrying Amount, Consumer	426,015,000	[1]	425,382,000	[1]
Loans and Leases Receivable, Gross Carrying Amount, Consumer, Percentage of Total	47.50%	[1]	51.60%	[1]
Commercial And Industrial [Member]
Loans and Leases Receivable, Gross Carrying Amount, Commercial and Industrial	370,817,000		300,034,000
Loans and Leases Receivable, Gross Carrying Amount, Commercial and Industrial, Percentage of Total	41.30%		36.40%
Residential Real Estate [Member]
Loans and Leases Receivable, Gross Carrying Amount, Residential Real Estate	69,481,000		65,657,000
Loans and Leases Receivable, Gross Carrying Amount, Residential Real Estate, Percentage of Total	7.70%		8.00%
Home Equity Lines Of Credit [Member]
Loans and Leases Receivable, Gross Carrying Amount, Home Equity Lines of Credit	18,114,000		19,531,000
Loans and Leases Receivable, Gross Carrying Amount, Home Equity Lines of Credit, Percentage of Total	2.00%		2.40%
Commercial Real Estate [Member]
Loans and Leases Receivable, Gross Carrying Amount, Commercial Real Estate	12,720,000		12,805,000
Loans and Lease Receivable, Gross Carrying Amount, Commercial Real Estate Percentage Of Total	1.40%		1.50%
Construction And Land [Member]
Loans and Leases Receivable, Gross Carrying Amount, Construction and Land	$ 510,000		$ 510,000
Loans and Leases Receivable, Gross Carrying Amount, Construction and Land, Percentage of Total	0.10%		0.10%

[1] Includes securities-based loans of $425.9 million and $425.3 million at March 31, 2013 and December 31, 2012, respectively.