Note 7 - Investment Securities (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Note 7 - Investment Securities (Details) [Line Items]
Trading Securities, Change in Unrealized Holding Gain (Loss)	$ (17,000)
Trading Securities	4,485,000		0
Proceeds from Sale of Available-for-sale Securities	12,581,000	4,097,000
Available-for-sale Securities Pledged as Collateral	192,485,000		207,868,000
Income Tax Benefit Related To Net Realized Gains Losses On Sales Of Securities	211,000	144,000
Proceeds from Sale of Held-to-maturity Securities	0	0
Available-for-sale Securities, Amortized Cost Basis	361,947,000		393,840,000
Available-for-sale Securities	359,452,000		388,670,000
Fair Value Inputs, Prepayment Rate	1.00%
Threshold for Identifying Banks with Trust Preferred Securities	15,000,000,000
Minimum Cost Saving for Refinance	2.00%
Bank Failure Rate	0.36%
Fair Value Inputs, Loss Severity	95.00%
Pooled Trust Preferred Securities [Member]
Note 7 - Investment Securities (Details) [Line Items]
Available-for-sale Securities, Amortized Cost Basis	3,519,000		3,519,000
Available-for-sale Securities	$ 2,238,000		$ 2,069,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	5
Pooled Trust Preferred Securities [Member] | Minimum [Member]
Note 7 - Investment Securities (Details) [Line Items]
Fair Value Inputs, Loss Severity	0.00%
Pooled Trust Preferred Securities [Member] | Maximum [Member]
Note 7 - Investment Securities (Details) [Line Items]
Fair Value Inputs, Loss Severity	100.00%