Note 17 - Components of Accumulated Other Comprehensive Income (Details) - Components of Accumulated Other Comprehensive Income (Loss) (Parentheticals) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized holding gain (loss) on available for sale securities, tax	$ 6,693	$ (8,665)	$ (323)
Reclassification adjustment, tax	(1)	19	(16)
Net pension gain (loss) arising during the period, tax	(574)	1,022	(405)
Less amortization of prior service cost included in net periodic pension cost, tax	$ (39)	$ (35)	$ (35)