Note 11 - Financial Assets and Liabilities Reported Under the Fair Value Option (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Collateralized Mortgage Backed Securities [Member]
Financial Assets at Fair Value Option		$ 2,292		$ 2,292		$ 2,527
Fair Value, Option, Changes in Fair Value, Gain (Loss)		(3)	$ (28)	2	$ (36)
Fair Value, Option, Changes in Fair Value, Gain (Loss)		(3)	(28)	2	(36)
Other Securities [Member]
Financial Assets at Fair Value Option		28,514		28,514		28,205
Fair Value, Option, Changes in Fair Value, Gain (Loss)		90	(108)	186	89
Fair Value, Option, Changes in Fair Value, Gain (Loss)		90	(108)	186	89
Borrowed Funds [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)		492	(1,229)	1,546	(705)
Financial Liabilities at Fair Value Option		27,485		27,485		29,018
Fair Value, Option, Changes in Fair Value, Gain (Loss)		492	(1,229)	1,546	(705)
Financial Assets and Liabilities, Excluding Interest Rate Caps / Swaps [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	[1],[2]	579	(1,365)	1,734	(652)
Fair Value, Option, Changes in Fair Value, Gain (Loss)	[1],[2]	579	(1,365)	1,734	(652)
Financial Assets at Fair Value Option		30,800		30,800		30,700
Fair Value, Option, Changes in Fair Value, Gain (Loss)		(1,115)	768	(2,102)	173
Financial Liabilities at Fair Value Option		27,500		27,500		$ 29,000
Fair Value, Option, Changes in Fair Value, Gain (Loss)		$ (1,115)	$ 768	$ (2,102)	$ 173

[1] The net gain (loss) from fair value adjustments presented in the above table does not include net gains (losses) of ($3.8) million and $0.8 million for the six months ended June 30, 2016 and 2015, respectively, from the change in the fair value of interest rate swaps.

[2] The net gain from fair value adjustments presented in the above table does not include net gains and (losses) of ($1.7) million and $2.1 million for the three months ended June 30, 2016 and 2015, respectively, from the change in the fair value of interest rate swaps.