Bank Loans (Schedule Of Balance And Associated Percentage Of Each Major Loan Category In Loan Portfolio) (Details) (USD $)	Sep. 30, 2013		Jun. 30, 2013	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Loans and Leases Receivable, Gross Carrying Amount, Total	$ 1,076,298,000			$ 823,919,000
Loans and Leases Receivable, Gross Carrying Amount, Total	100.00%			100.00%
Unamortized loan fees, net of origination costs	(1,752,000)			(1,207,000)
Loans in process	(163,000)			1,370,000
Allowance for loan losses	(13,233,000)		(10,919,000)	(8,145,000)		(6,394,000)	(6,292,000)	(5,300,000)
Loans and leases receivable, net reported amount	1,061,150,000			815,937,000
Securities-based loans	489,800,000			425,300,000
Consumer [Member]
Loans and Leases Receivable, Gross Carrying Amount, Consumer	489,867,000	[1]		425,382,000	[1]
Loans and Leases Receivable, Gross Carrying Amount, Consumer, Percentage of Total	45.50%	[1]		51.60%	[1]
Commercial And Industrial [Member]
Loans and Leases Receivable, Gross Carrying Amount, Commercial and Industrial	481,336,000			300,034,000
Loans and Leases Receivable, Gross Carrying Amount, Commercial and Industrial, Percentage of Total	44.70%			36.40%
Residential Real Estate [Member]
Loans and Leases Receivable, Gross Carrying Amount, Residential Real Estate	75,233,000			65,657,000
Loans and Leases Receivable, Gross Carrying Amount, Residential Real Estate, Percentage of Total	7.00%			8.00%
Home Equity Lines Of Credit [Member]
Loans and Leases Receivable, Gross Carrying Amount, Home Equity Lines of Credit	16,856,000			19,531,000
Loans and Leases Receivable, Gross Carrying Amount, Home Equity Lines of Credit, Percentage of Total	1.60%			2.40%
Commercial Real Estate [Member]
Loans and Leases Receivable, Gross Carrying Amount, Commercial Real Estate	12,516,000			12,805,000
Loans and Lease Receivable, Gross Carrying Amount, Commercial Real Estate Percentage Of Total	1.20%			1.50%
Construction And Land [Member]
Loans and Leases Receivable, Gross Carrying Amount, Construction and Land	$ 490,000			$ 510,000
Loans and Leases Receivable, Gross Carrying Amount, Construction and Land, Percentage of Total				0.10%

[1] September 30, 2013December 31, 2012BalancePercentBalancePercentConsumer (1)$ 489,867 45.5%$ 425,382 51.6%Commercial and industrial 481,336 44.7 300,034 36.4Residential real estate 75,233 7.0 65,657 8.0Home equity lines of credit 16,856 1.6 19,531 2.4Commercial real estate 12,516 1.2 12,805 1.5Construction and land 490 0.0 510 0.1 1,076,298100.0% 823,919100.0%Unamortized loan fees, net of origination costs (1,752) (1,207)Loans in process (163) 1,370Allowance for loan losses (13,233) (8,145)$ 1,061,150$ 815,937Includes securities-based loans of $489.8 million and $425.3 million at September 30, 2013 and December 31, 2012, respectively.