Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans and Associated Reserves (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012
Financing Receivable, Impaired [Line Items]
Principal Balance	$ 17,046		$ 18,456		$ 11,965
(A) Total Recorded Investment(1)	17,032	[1]	18,422	[1]
Recorded Investment(1)in (A) for Which There is No Related Allowance	14,551		16,940
Recorded Investment(1)in (A) for Which There is a Related Allowance	2,481		1,482
Related Allowance	631		554		327
Real Estate Construction [Member] | Construction residential [Member]
Financing Receivable, Impaired [Line Items]
Principal Balance	123		123
(A) Total Recorded Investment(1)	118	[1]	118	[1]
Recorded Investment(1)in (A) for Which There is No Related Allowance	118		118
Real Estate Construction [Member] | Construction other [Member]
Financing Receivable, Impaired [Line Items]
Principal Balance	2,869		6,520
(A) Total Recorded Investment(1)	2,854	[1]	6,487	[1]
Recorded Investment(1)in (A) for Which There is No Related Allowance	2,854		6,487
Consumer Real Estate [Member] | Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
(A) Total Recorded Investment(1)		[1]		[1]
Consumer Real Estate [Member] | Residential closed end first liens [Member]
Financing Receivable, Impaired [Line Items]
Principal Balance	760		783
(A) Total Recorded Investment(1)	762	[1]	785	[1]
Recorded Investment(1)in (A) for Which There is No Related Allowance	214		634
Recorded Investment(1)in (A) for Which There is a Related Allowance	548		151
Related Allowance	4		43
Consumer Real Estate [Member] | Residential closed end junior liens [Member]
Financing Receivable, Impaired [Line Items]
Principal Balance	310		81
(A) Total Recorded Investment(1)	312	[1]	81	[1]
Recorded Investment(1)in (A) for Which There is No Related Allowance	48		81
Recorded Investment(1)in (A) for Which There is a Related Allowance	264
Related Allowance	7
Consumer Real Estate [Member] | Investor-owned residential real estate [Member]
Financing Receivable, Impaired [Line Items]
Principal Balance	129
(A) Total Recorded Investment(1)	131	[1]
Recorded Investment(1)in (A) for Which There is No Related Allowance	131
Commercial Real Estate Loans [Member] | Multifamily real estate [Member]
Financing Receivable, Impaired [Line Items]
Principal Balance	3,970		5,284
(A) Total Recorded Investment(1)	3,967	[1]	5,288	[1]
Recorded Investment(1)in (A) for Which There is No Related Allowance	3,967		5,288
Commercial Real Estate Loans [Member] | Commercial real estate, owner occupied [Member]
Financing Receivable, Impaired [Line Items]
Principal Balance	5,271		5,045
(A) Total Recorded Investment(1)	5,274	[1]	5,043	[1]
Recorded Investment(1)in (A) for Which There is No Related Allowance	3,713		4,293
Recorded Investment(1)in (A) for Which There is a Related Allowance	1,561		750
Related Allowance	617		273
Commercial Real Estate Loans [Member] | Commercial real estate, other [Member]
Financing Receivable, Impaired [Line Items]
Principal Balance	3,478
(A) Total Recorded Investment(1)	3,478	[1]		[1]
Recorded Investment(1)in (A) for Which There is No Related Allowance	3,478
Commercial Non Real Estate [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Principal Balance	112		574
(A) Total Recorded Investment(1)	112	[1]	574	[1]
Recorded Investment(1)in (A) for Which There is No Related Allowance	4		39
Recorded Investment(1)in (A) for Which There is a Related Allowance	108		535
Related Allowance	3		231
Public Sector and IDA [Member] | Public Sector and IDA [Member]
Financing Receivable, Impaired [Line Items]
(A) Total Recorded Investment(1)		[1]		[1]
Consumer Non Real Estate [Member] | Credit Card Receivable [Member]
Financing Receivable, Impaired [Line Items]
(A) Total Recorded Investment(1)		[1]		[1]
Consumer Non Real Estate [Member] | Automobile [Member]
Financing Receivable, Impaired [Line Items]
Principal Balance	24		46
(A) Total Recorded Investment(1)	24	[1]	46	[1]
Recorded Investment(1)in (A) for Which There is No Related Allowance	24
Recorded Investment(1)in (A) for Which There is a Related Allowance			46
Related Allowance			7
Consumer Non Real Estate [Member] | Other Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
(A) Total Recorded Investment(1)		[1]		[1]

[1] Recorded investment includes the unpaid principal balance and any accrued interest and net deferred fees.