Note 3 - Securities (Details) - Debt and Equity Securities (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 208,227	$ 217,708
Gross Unrealized Gains	5,905	4,327
Gross Unrealized Losses	(2,333)	(3,925)
Estimated Fair Value	211,799	218,110
US Government Agencies and Corporations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	44,306	32,503
Gross Unrealized Gains	66	4
Gross Unrealized Losses	(1,705)	(2,557)
Estimated Fair Value	42,667	29,950
Mortgage-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	39,114	51,318
Gross Unrealized Gains	242	100
Gross Unrealized Losses	(203)	(555)
Estimated Fair Value	39,153	50,863
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	124,807	123,729
Gross Unrealized Gains	5,597	4,223
Gross Unrealized Losses	(425)	(813)
Estimated Fair Value	129,979	127,139
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		10,000
Estimated Fair Value		10,000
Corporate and Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		158
Estimated Fair Value		$ 158