Note 11 - Financial Assets and Liabilities Reported Under the Fair Value Option (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Collateralized Mortgage Backed Securities [Member]
Financial Assets at Fair Value Option		$ 2,403		$ 2,527
Fair Value, Option, Changes in Fair Value, Gain (Loss)		5	$ (8)
Borrowed funds		5	(8)
Other Securities [Member]
Financial Assets at Fair Value Option		28,361		28,205
Fair Value, Option, Changes in Fair Value, Gain (Loss)		96	197
Borrowed funds		96	197
Borrowed Funds [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		1,054	524
Financial Liabilities at Fair Value Option		27,977		29,018
Borrowed funds		1,054	524
Financial Assets and Liabilities, Excluding Interest Rate Caps / Swaps [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	[1]	1,155	713
Borrowed funds	[1]	1,155	713
Financial Assets at Fair Value Option		30,800		30,700
Fair Value, Option, Changes in Fair Value, Gain (Loss)		(987)	(595)
Financial Liabilities at Fair Value Option		28,000		$ 29,000
Borrowed funds		$ (987)	$ (595)

[1] The net gain from fair value adjustments presented in the above table does not include net losses of $2.1 million and $1.3 million for the three months ended March 31, 2016 and 2015, respectively, from the change in the fair value of interest rate swaps.