Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	$ 359,452,000	$ 388,670,000
Available-for-sale Securities Gross Unrealized Holding Gains	4,406,000	4,446,000
Available-for-sale Securities Gross Unrealized Holding Losses	(6,901,000)	(9,616,000)
Available-for-sale Securities Amortized Cost	361,947,000	393,840,000
US Government Agencies Debt Securities [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	62,094,000	71,639,000
Available-for-sale Securities Gross Unrealized Holding Gains	183,000	195,000
Available-for-sale Securities Gross Unrealized Holding Losses	(1,115,000)	(1,702,000)
Available-for-sale Securities Amortized Cost	63,026,000	73,146,000
State and Municipal [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	80,235,000	87,199,000
Available-for-sale Securities Gross Unrealized Holding Gains	1,282,000	1,023,000
Available-for-sale Securities Gross Unrealized Holding Losses	(831,000)	(1,627,000)
Available-for-sale Securities Amortized Cost	79,784,000	87,803,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	129,762,000	139,723,000
Available-for-sale Securities Gross Unrealized Holding Gains	1,520,000	1,436,000
Available-for-sale Securities Gross Unrealized Holding Losses	(1,654,000)	(2,361,000)
Available-for-sale Securities Amortized Cost	129,896,000	140,648,000
Collateralized Mortgage Obligations [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	72,330,000	75,394,000
Available-for-sale Securities Gross Unrealized Holding Gains	503,000	556,000
Available-for-sale Securities Gross Unrealized Holding Losses	(1,870,000)	(2,334,000)
Available-for-sale Securities Amortized Cost	73,697,000	77,172,000
Pooled Trust Preferred Securities [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	2,238,000	2,069,000
Available-for-sale Securities Gross Unrealized Holding Gains	120,000	85,000
Available-for-sale Securities Gross Unrealized Holding Losses	(1,401,000)	(1,535,000)
Available-for-sale Securities Amortized Cost	3,519,000	3,519,000
Corporate Debt Securities [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	6,050,000	6,021,000
Available-for-sale Securities Gross Unrealized Holding Gains	44,000	24,000
Available-for-sale Securities Gross Unrealized Holding Losses	(3,000)	(13,000)
Available-for-sale Securities Amortized Cost	6,009,000	6,010,000
Equity Securities [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Available-for-Sale [Line Items]
Available-for-sale Securities	6,743,000	6,625,000
Available-for-sale Securities Gross Unrealized Holding Gains	754,000	1,127,000
Available-for-sale Securities Gross Unrealized Holding Losses	(27,000)	(44,000)
Available-for-sale Securities Amortized Cost	$ 6,016,000	$ 5,542,000