Note 9 - Components of Accumulated Other Comprehensive Loss (Details) - Components of Accumulated Other Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			$ (5,672)	$ (16,964)
Unrealized holding gain (loss) on available for sale securities net of tax	$ 2,589	$ 1,708	(624)	7,920
Reclassification adjustment, net of tax	(1)	(3)	(3)	(3)
Balance	(6,299)	(9,047)	(6,299)	(9,047)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(1,582)	(14,011)
Unrealized holding gain (loss) on available for sale securities net of tax			(624)	7,920
Reclassification adjustment, net of tax			(3)	(3)
Balance	(2,209)	(6,094)	(2,209)	(6,094)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			(4,090)	(2,953)
Balance	$ (4,090)	$ (2,953)	$ (4,090)	$ (2,953)