Note 7 - Investment Securities (Details) - Investment Securities Available-for-sale (USD $)	Sep. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities	$ 362,468,000	$ 388,670,000
Available-for-sale securities, gross unrealized holding gains	4,684,000	4,446,000
Available-for-sale securities, gross unrealized holding losses	(5,122,000)	(9,616,000)
Available-for-sale securities, amortized cost	362,906,000	393,840,000
US Government Agencies Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities	56,322,000	71,639,000
Available-for-sale securities, gross unrealized holding gains	161,000	195,000
Available-for-sale securities, gross unrealized holding losses	(768,000)	(1,702,000)
Available-for-sale securities, amortized cost	56,929,000	73,146,000
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities	74,133,000	87,199,000
Available-for-sale securities, gross unrealized holding gains	1,604,000	1,023,000
Available-for-sale securities, gross unrealized holding losses	(220,000)	(1,627,000)
Available-for-sale securities, amortized cost	72,749,000	87,803,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities	139,171,000	139,723,000
Available-for-sale securities, gross unrealized holding gains	1,595,000	1,436,000
Available-for-sale securities, gross unrealized holding losses	(1,120,000)	(2,361,000)
Available-for-sale securities, amortized cost	138,696,000	140,648,000
Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities	77,027,000	75,394,000
Available-for-sale securities, gross unrealized holding gains	391,000	556,000
Available-for-sale securities, gross unrealized holding losses	(1,730,000)	(2,334,000)
Available-for-sale securities, amortized cost	78,366,000	77,172,000
Pooled Trust Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities	2,462,000	2,069,000
Available-for-sale securities, gross unrealized holding gains	167,000	85,000
Available-for-sale securities, gross unrealized holding losses	(1,224,000)	(1,535,000)
Available-for-sale securities, amortized cost	3,519,000	3,519,000
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities	6,060,000	6,021,000
Available-for-sale securities, gross unrealized holding gains	52,000	24,000
Available-for-sale securities, gross unrealized holding losses		(13,000)
Available-for-sale securities, amortized cost	6,008,000	6,010,000
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities	7,293,000	6,625,000
Available-for-sale securities, gross unrealized holding gains	714,000	1,127,000
Available-for-sale securities, gross unrealized holding losses	(60,000)	(44,000)
Available-for-sale securities, amortized cost	$ 6,639,000	$ 5,542,000