Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Individually	$ 2,000	$ 2,274
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Collectively	20,401	19,911
Ending Allowance Balance Attributable to Loans Evaluated for Impairment	22,594	22,347
Loan Balances Evaluated for Impairment Individually	7,327	9,392
Loan Balances Evaluated for Impairment Collectively	1,734,738	1,640,361
Total	1,791,253	1,770,990
Evaluated for Impairment [Member] | Commercial and Industrial [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Total	629,317	627,785
Evaluated for Impairment [Member] | Loans To Non Depository Institutions [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Total	400,812	348,809
Evaluated for Impairment [Member] | Factored Receivables [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Total	148,120	151,593
Evaluated for Impairment [Member] | Equipment Financing Receivables [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Total	185,451	162,094
Evaluated for Impairment [Member] | Real Estate Residential Mortgage [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Total	174,146	151,609
Evaluated for Impairment [Member] | Commercial Mortgage [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Total	168,162	182,735
Evaluated for Impairment [Member] | Commercial Real Estate Construction and Land Development [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Total	13,703	13,277
Evaluated for Impairment [Member] | Loans To Individual [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Total	22,354	11,851
Evaluated for Impairment [Member] | Loans To Depository Institutions [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Total	0	0
Evaluated for Impairment [Member] | Unallocated [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Total	0	0
Evaluated for Impairment [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Total	1,742,065	1,649,753
Commercial and Industrial [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Individually	172	325
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Collectively	8,192	8,337
Ending Allowance Balance Attributable to Loans Evaluated for Impairment	8,364	8,662
Loan Balances Evaluated for Impairment Individually	760	2,406
Loan Balances Evaluated for Impairment Collectively	628,557	625,379
Loans To Non Depository Institutions [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Individually	0	0
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Collectively	1,672	1,726
Ending Allowance Balance Attributable to Loans Evaluated for Impairment	1,672	1,726
Loan Balances Evaluated for Impairment Individually	0	0
Loan Balances Evaluated for Impairment Collectively	400,812	348,809
Factored Receivables [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Individually	0	0
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Collectively	1,674	1,447
Ending Allowance Balance Attributable to Loans Evaluated for Impairment	1,674	1,447
Loan Balances Evaluated for Impairment Individually	0	0
Loan Balances Evaluated for Impairment Collectively	148,120	151,593
Equipment Financing Receivables [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Individually	8	7
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Collectively	3,618	3,756
Ending Allowance Balance Attributable to Loans Evaluated for Impairment	3,626	3,763
Loan Balances Evaluated for Impairment Individually	89	89
Loan Balances Evaluated for Impairment Collectively	185,362	162,005
Real Estate Residential Mortgage [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Individually	1,470	1,592
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Collectively	2,627	2,172
Ending Allowance Balance Attributable to Loans Evaluated for Impairment	4,097	3,764
Loan Balances Evaluated for Impairment Individually	5,733	6,152
Loan Balances Evaluated for Impairment Collectively	168,413	145,457
Commercial Mortgage [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Individually	350	350
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Collectively	2,177	2,154
Ending Allowance Balance Attributable to Loans Evaluated for Impairment	2,527	2,504
Loan Balances Evaluated for Impairment Individually	745	745
Loan Balances Evaluated for Impairment Collectively	167,417	181,990
Commercial Real Estate Construction and Land Development [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Individually	0	0
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Collectively	177	156
Ending Allowance Balance Attributable to Loans Evaluated for Impairment	177	156
Loan Balances Evaluated for Impairment Individually	0	0
Loan Balances Evaluated for Impairment Collectively	13,703	13,277
Loans To Individual [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Individually	0	0
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Collectively	264	163
Ending Allowance Balance Attributable to Loans Evaluated for Impairment	264	163
Loan Balances Evaluated for Impairment Individually	0	0
Loan Balances Evaluated for Impairment Collectively	22,354	11,851
Loans To Depository Institutions [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Individually	0	0
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Collectively	0	0
Ending Allowance Balance Attributable to Loans Evaluated for Impairment	0	0
Loan Balances Evaluated for Impairment Individually	0	0
Loan Balances Evaluated for Impairment Collectively	0	0
Unallocated [Member]
Note 3 - Loans and Allowance for Loan Losses (Details) - Balance in the Allowance for Loan Losses and the Recorded Investment in Loans by Portfolio Segment [Line Items]
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Individually	0	0
Ending Allowance Balance Attributable to Loans Evaluated for Impairment Collectively	0	0
Ending Allowance Balance Attributable to Loans Evaluated for Impairment	193	162
Loan Balances Evaluated for Impairment Individually	0	0
Loan Balances Evaluated for Impairment Collectively	$ 0	$ 0