Note 18 - Fair Value of Financial Instruments - Financial Assets and Liabilities Reported Under the Fair Value Option (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financial Assets at Fair Value Option		$ 30,400	$ 30,700
Net loss from fair value adjustments		(3,434)	(1,841)	$ (2,568)
Financial Liabilities at Fair Value Option		34,000	29,000
Collateralized Mortgage Backed Securities [Member]
Financial Assets at Fair Value Option		2,016	2,527
Net loss from fair value adjustments		(25)	(59)	75
Other Securities [Member]
Financial Assets at Fair Value Option		28,429	28,205
Net loss from fair value adjustments		(38)	53	598
Borrowed Funds [Member]
Net loss from fair value adjustments		(4,908)	(238)	802
Financial Liabilities at Fair Value Option		33,959	29,018
Financial Assets and Liabilities, Excluding Interest Rate Caps / Swaps [Member]
Net loss from fair value adjustments	[1]	$ (4,971)	$ (244)	$ 1,475

[1] The net gain (loss) from fair value adjustments presented in the above table does not include net gains and (losses) of $1.5 million, ($1.6) million and ($4.0) million from the change in fair value of derivative instruments during the years ended December 31, 2016, 2015 and 2014, respectively.