Note 5 - Loans and Allowance for Loan Losses (Detail) - Allowance for Loan Losses by Portfolio Segment (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Balance, Beginning of Period	$ 20,029		$ 18,238
Charge-Offs	9,672	[1]	12,854	[1]	31,097
Recoveries	1,740		2,645		1,501
Net Charge-Offs	7,932	[1]	10,209	[1]
Provision for loan losses	10,250		12,000
Balance, End of Period	22,347		20,029		18,238
Commercial and Industrial [Member]
Balance, Beginning of Period	7,647		7,454
Charge-Offs	4,993		2,909		7,212
Recoveries	267		146		312
Net Charge-Offs	4,726		2,763
Provision for loan losses	5,741		2,956
Balance, End of Period	8,662		7,647		7,454
Loans To Non Depository Institutions [Member]
Balance, Beginning of Period	1,369		564
Charge-Offs			0
Recoveries			0
Provision for loan losses	357		805
Balance, End of Period	1,726		1,369
Factored Receivables [Member]
Balance, Beginning of Period	1,450		1,424
Charge-Offs	387		358		665
Recoveries	102		79		239
Net Charge-Offs	285		279
Provision for loan losses	282		305
Balance, End of Period	1,447		1,450		1,424
Equipment Financing Receivables [Member]
Balance, Beginning of Period	3,515		3,423
Charge-Offs	2,602		8,266		22,509
Recoveries	1,282		2,255		902
Net Charge-Offs	1,320		6,011
Provision for loan losses	1,568		6,103
Balance, End of Period	3,763		3,515		3,423
Real Estate Residential Mortgage [Member]
Balance, Beginning of Period	3,490		2,497
Charge-Offs	825	[1]	1,291	[1]	351
Recoveries	8		165
Net Charge-Offs	817	[1]	1,126	[1]
Provision for loan losses	1,091		2,119
Balance, End of Period	3,764		3,490		2,497
Commercial Mortgage [Member]
Balance, Beginning of Period	2,151		2,275
Charge-Offs	671				129
Recoveries	66
Net Charge-Offs	605
Provision for loan losses	958		(124)
Balance, End of Period	2,504		2,151		2,275
Commercial Real Estate Construction and Land Development [Member]
Balance, Beginning of Period	165		310
Charge-Offs			0
Recoveries			0
Provision for loan losses	(9)		(145)
Balance, End of Period	156		165
Loans To Individual [Member]
Balance, Beginning of Period	104		119
Charge-Offs	194		30		231
Recoveries	15				48
Net Charge-Offs	179		30
Provision for loan losses	238		15
Balance, End of Period	163		104		119
Loans To Depository Institutions [Member]
Balance, Beginning of Period			46
Charge-Offs			0
Recoveries			0
Provision for loan losses			(46)
Balance, End of Period	0		0
Unallocated [Member]
Balance, Beginning of Period	138		126
Charge-Offs			0
Recoveries			0
Provision for loan losses	24		12
Balance, End of Period	$ 162		$ 138

[1] Includes losses on transfers to OREO.