Note 16 - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive (loss) income	$ (5,693)	$ (827)	$ 1,375
Tax effect	1,936	281	(468)
Accumulated other comprehensive income (loss), net of tax	(3,757)	(546)	907
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive (loss) income	(5,446)	(568)	1,975
Accumulated Other-than-Temporary Impairment Attributable to Parent [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive (loss) income	$ (247)	$ (259)	$ (600)