Note 4 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Note 4 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	$ 388,670,000	$ 401,502,000
Available-for-sale Securities Gross Unrealized Holding Gains	4,446,000	8,745,000
Available-for-sale Securities Gross Unrealized Holding Losses	(9,616,000)	(1,993,000)
Available-for-sale Securities Amortized Cost	393,840,000	394,750,000
US Government Agencies Debt Securities [Member]
Note 4 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	71,639,000	104,130,000
Available-for-sale Securities Gross Unrealized Holding Gains	195,000	750,000
Available-for-sale Securities Gross Unrealized Holding Losses	(1,702,000)	(19,000)
Available-for-sale Securities Amortized Cost	73,146,000	103,399,000
State and Municipal [Member]
Note 4 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	87,199,000	86,789,000
Available-for-sale Securities Gross Unrealized Holding Gains	1,023,000	3,141,000
Available-for-sale Securities Gross Unrealized Holding Losses	(1,627,000)	(91,000)
Available-for-sale Securities Amortized Cost	87,803,000	83,739,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Note 4 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	139,723,000	107,973,000
Available-for-sale Securities Gross Unrealized Holding Gains	1,436,000	3,169,000
Available-for-sale Securities Gross Unrealized Holding Losses	(2,361,000)	(33,000)
Available-for-sale Securities Amortized Cost	140,648,000	104,837,000
Collateralized Mortgage Obligations [Member]
Note 4 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	75,394,000	94,091,000
Available-for-sale Securities Gross Unrealized Holding Gains	556,000	1,188,000
Available-for-sale Securities Gross Unrealized Holding Losses	(2,334,000)	(155,000)
Available-for-sale Securities Amortized Cost	77,172,000	93,058,000
Pooled Trust Preferred Securities [Member]
Note 4 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	2,069,000	1,962,000
Available-for-sale Securities Gross Unrealized Holding Gains	85,000	51,000
Available-for-sale Securities Gross Unrealized Holding Losses	(1,535,000)	(1,608,000)
Available-for-sale Securities Amortized Cost	3,519,000	3,519,000
Corporate Debt Securities [Member]
Note 4 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	6,021,000	2,502,000
Available-for-sale Securities Gross Unrealized Holding Gains	24,000	44,000
Available-for-sale Securities Gross Unrealized Holding Losses	(13,000)
Available-for-sale Securities Amortized Cost	6,010,000	2,458,000
Equity Securities [Member]
Note 4 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	6,625,000	4,055,000
Available-for-sale Securities Gross Unrealized Holding Gains	1,127,000	402,000
Available-for-sale Securities Gross Unrealized Holding Losses	(44,000)	(87,000)
Available-for-sale Securities Amortized Cost	$ 5,542,000	$ 3,740,000