Note 5 - Loans Acquired (Details) - Summary of the Changes in the FDIC True-Up Provision - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Summary of the Changes in the FDIC True-Up Provision [Abstract]
Balance	$ 8,921	$ 7,768	$ 8,308	$ 6,768
Amortization expense	27	42	107	126
Adjustments related to changes in expected losses	187	278	720	1,194
Loss share termination agreement	(9,135)	0	(9,135)	0
Balance	$ 0	$ 8,088	$ 0	$ 8,088