Note 10 - Fair Value of Financial Instruments (Details) - Financial Assets and Liabilities Reported Under the Fair Value Option (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value Measurements	$ 39,300				$ 37,300
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	(644)		(123)
Borrowed funds	29,500				29,600
Borrowed funds	(644)		(123)
Net gain (loss) from fair value adjustments (1)	(644)		(123)
Collateralized Mortgage Backed Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value Measurements	5,823				7,119
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	48		(362)
Borrowed funds	48		(362)
Net gain (loss) from fair value adjustments (1)	48		(362)
Other securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value Measurements	33,447				30,163
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	325		273
Borrowed funds	325		273
Net gain (loss) from fair value adjustments (1)	325		273
Borrowed funds [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	25		(819)
Borrowed funds	29,541				29,570
Borrowed funds	25		(819)
Net gain (loss) from fair value adjustments (1)	25		(819)
Financial Assets And Liabilities, Excluding Interest Rate Caps / Swaps [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	398	[1]	(908)	[1]
Borrowed funds	398	[1]	(908)	[1]
Net gain (loss) from fair value adjustments (1)	$ 398	[1]	$ (908)	[1]

[1] The net gain (loss) from fair value adjustments presented in the above table does not include net losses of $1.0 million and net gains of $0.8million for the three months ended March 31, 2014 and 2013, respectively, from the change in the fair value of interest rate caps / swaps.