Note 5 - Loans and Allowance for Loan Losses (Detail) - Activity in the Allowance (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Balance	$ 22,347		$ 20,029		$ 18,238
Charge-Offs	9,672	[1]	12,854	[1]	31,097
Recoveries	1,740		2,645		1,501
Net charge-offs					29,596
Provision for loan losses	10,250		12,000		28,500
Less loss on transfers to other real estate owned					538
Commercial and Industrial [Member]
Balance	8,662		7,647		7,454
Charge-Offs	4,993		2,909		7,212
Recoveries	267		146		312
Factored Receivables [Member]
Balance	1,447		1,450		1,424
Charge-Offs	387		358		665
Recoveries	102		79		239
Equipment Financing Receivables [Member]
Balance	3,763		3,515		3,423
Charge-Offs	2,602		8,266		22,509
Recoveries	1,282		2,255		902
Real Estate Residential Mortgage [Member]
Balance	3,764		3,490		2,497
Charge-Offs	825	[1]	1,291	[1]	351
Recoveries	8		165
Commercial Mortgage [Member]
Balance	2,504		2,151		2,275
Charge-Offs	671				129
Recoveries	66
Commercial Real Estate Construction and Land Development [Member]
Balance	156		165		310
Charge-Offs			0
Recoveries			0
Loans To Individual [Member]
Balance	163		104		119
Charge-Offs	194		30		231
Recoveries	15				48
Beginning of Period [Member]
Balance					19,872
End of Period [Member]
Balance					$ 18,238

[1] Includes losses on transfers to OREO.