Bank Loans (Schedule Of Balance And Associated Percentage Of Each Major Loan Category In Loan Portfolio) (Details) (USD $)	Sep. 30, 2012		Jun. 30, 2012	Dec. 31, 2011		Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2010
Loans and Leases Receivable, Gross Carrying Amount, Total	$ 753,551,000			$ 637,857,000
Loans and Leases Receivable, Gross Carrying Amount, Total	100.00%			100.00%
Unamortized loan fees, net of origination costs	(1,038,000)			(421,000)
Loans in process	448,000			4,000
Allowance for loan losses	(6,394,000)		(6,292,000)	(5,300,000)		(3,830,000)	(3,251,000)	(2,331,000)
Loans and leases receivable, net reported amount	746,567,000			632,140,000
Securities-based loans	414,500,000			371,100,000
Consumer [Member]
Loans and Leases Receivable, Gross Carrying Amount, Consumer	414,577,000	[1]		371,399,000	[1]
Loans and Leases Receivable, Gross Carrying Amount, Consumer, Percentage of Total	55.00%	[1]		58.20%	[1]
Commercial And Industrial [Member]
Loans and Leases Receivable, Gross Carrying Amount, Commercial and Industrial	255,356,000			186,996,000
Loans and Leases Receivable, Gross Carrying Amount, Commercial and Industrial, Percentage of Total	33.90%			29.30%
Residential Real Estate [Member]
Loans and Leases Receivable, Gross Carrying Amount, Residential Real Estate	59,050,000			51,755,000
Loans and Leases Receivable, Gross Carrying Amount, Residential Real Estate, Percentage of Total	7.80%			8.10%
Home Equity Lines Of Credit [Member]
Loans and Leases Receivable, Gross Carrying Amount, Home Equity Lines of Credit	21,188,000			24,086,000
Loans and Leases Receivable, Gross Carrying Amount, Home Equity Lines of Credit, Percentage of Total	2.80%			3.80%
Commercial Real Estate [Member]
Loans and Leases Receivable, Gross Carrying Amount, Commercial Real Estate	2,867,000			3,107,000
Loans and Lease Receivable, Gross Carrying Amount, Commercial Real Estate Percentage Of Total	0.40%			0.50%
Construction And Land [Member]
Loans and Leases Receivable, Gross Carrying Amount, Construction and Land	$ 513,000			$ 514,000
Loans and Leases Receivable, Gross Carrying Amount, Construction and Land, Percentage of Total	0.10%			0.10%

[1] Includes securities-based loans of $414.5 million and $371.1 million at September 30, 2012 and December 31, 2011, respectively.