Note 2 - Securities (Details) - Debt and Equity Securities (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 144,223	$ 143,661
Gross Unrealized Gains	5,324	9,232
Gross Unrealized Losses	(1,959)	(76)
Estimated Fair Value	147,588	152,817
US Government Agencies and Corporations (Member)
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	23,069	24,628
Gross Unrealized Gains	2	24
Gross Unrealized Losses	(1,312)	(3)
Estimated Fair Value	21,759	24,649
mortgage-backed securities (Member)
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,222	2,127
Gross Unrealized Gains	33	62
Gross Unrealized Losses	(100)	0
Estimated Fair Value	3,155	2,189
Obligations of States and Political Subdivisions (Member)
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	117,905	116,879
Gross Unrealized Gains	5,058	9,069
Gross Unrealized Losses	(547)	(73)
Estimated Fair Value	122,416	125,875
Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	27	27
Gross Unrealized Gains	231	77
Gross Unrealized Losses	0	0
Estimated Fair Value	$ 258	$ 104