Note 5 - Loans and Allowance for Loan Losses (Detail) - Weighted Average Risk Grades and Classified Loans by Class of Loan (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Loans (in Dollars)	$ 1,649,753	$ 1,473,309
Loans (in Dollars)	1,649,753	1,473,309
Commercial and Industrial [Member] | Risk Grades 1 To 4 [Member]
Weighted Average Risk Grade	3.21	3.41
Loans (in Dollars)	614,620	603,375
Loans (in Dollars)	614,620	603,375
Commercial and Industrial [Member] | Risk Grades 5 [Member]
Weighted Average Risk Grade	5.00	5.00
Loans (in Dollars)	3,823	5,006
Loans (in Dollars)	3,823	5,006
Commercial and Industrial [Member] | Risk Grades 6 [Member]
Weighted Average Risk Grade	6.00	6.00
Loans (in Dollars)		11,872
Loans (in Dollars)		11,872
Commercial and Industrial [Member] | Risk Grades 7 [Member]
Weighted Average Risk Grade	7.00	7.00
Loans (in Dollars)	9,342	3,871
Loans (in Dollars)	9,342	3,871
Commercial and Industrial [Member]
Weighted Average Risk Grade	3.28	3.50
Loans (in Dollars)	627,785	624,124
Loans (in Dollars)	627,785	624,124
Loans To Non Depository Institutions [Member] | Risk Grades 1 To 4 [Member]
Weighted Average Risk Grade	3.13	3.14
Loans (in Dollars)	342,020	240,154
Loans (in Dollars)	342,020	240,154
Loans To Non Depository Institutions [Member] | Risk Grades 5 [Member]
Weighted Average Risk Grade	5.00
Loans (in Dollars)	5,933
Loans (in Dollars)	5,933
Loans To Non Depository Institutions [Member] | Risk Grades 6 [Member]
Weighted Average Risk Grade	6.00
Loans (in Dollars)	856
Loans (in Dollars)	856
Loans To Non Depository Institutions [Member] | Risk Grades 7 [Member]
Weighted Average Risk Grade		7.00
Loans (in Dollars)		6,433
Loans (in Dollars)		6,433
Loans To Non Depository Institutions [Member]
Weighted Average Risk Grade	3.17	3.24
Loans (in Dollars)	348,809	246,587
Loans (in Dollars)	348,809	246,587
Factored Receivables [Member] | Risk Grades 1 To 4 [Member]
Weighted Average Risk Grade	3.08	2.84
Loans (in Dollars)	146,371	170,256
Loans (in Dollars)	146,371	170,256
Factored Receivables [Member] | Risk Grades 5 [Member]
Weighted Average Risk Grade	5.00	5.00
Loans (in Dollars)	4,751	1,575
Loans (in Dollars)	4,751	1,575
Factored Receivables [Member] | Risk Grades 6 [Member]
Weighted Average Risk Grade	6.00
Loans (in Dollars)	471
Loans (in Dollars)	471
Factored Receivables [Member]
Weighted Average Risk Grade	3.13	2.86
Loans (in Dollars)	151,593	171,831
Loans (in Dollars)	151,593	171,831
Equipment Financing Receivables [Member] | Risk Grades 1 To 4 [Member]
Weighted Average Risk Grade	3.93	3.89
Loans (in Dollars)	161,755	150,412
Loans (in Dollars)	161,755	150,412
Equipment Financing Receivables [Member] | Risk Grades 7 [Member]
Weighted Average Risk Grade	7.00	7.00
Loans (in Dollars)	339	370
Loans (in Dollars)	339	370
Equipment Financing Receivables [Member]
Weighted Average Risk Grade	3.94	3.90
Loans (in Dollars)	162,094	150,782
Loans (in Dollars)	162,094	150,782
Real Estate Commercial Mortgage and Construction [Member] | Risk Grades 1 To 4 [Member]
Weighted Average Risk Grade	3.07	3.18
Loans (in Dollars)	186,582	87,805
Loans (in Dollars)	186,582	87,805
Real Estate Commercial Mortgage and Construction [Member] | Risk Grades 6 [Member]
Weighted Average Risk Grade	6.00	6.00
Loans (in Dollars)	8,685	8,517
Loans (in Dollars)	8,685	8,517
Real Estate Commercial Mortgage and Construction [Member] | Risk Grades 7 [Member]
Weighted Average Risk Grade	7.00	7.00
Loans (in Dollars)	745	3,124
Loans (in Dollars)	745	3,124
Real Estate Commercial Mortgage and Construction [Member]
Weighted Average Risk Grade	3.21	3.54
Loans (in Dollars)	196,012	99,446
Loans (in Dollars)	$ 196,012	$ 99,446