Note 17 - Fair Value Measurements and Fair Values Of Financial Instruments (Details) - Financial Assets Measured at Fair Value on a Recurring and Nonrecurring Basis (USD $)	Dec. 31, 2013	Dec. 31, 2012
Securities available-for-sale
Available-for-sale Securities	$ 388,670,000	$ 401,502,000
Total recurring fair value measurements	388,670,000	401,502,000
Nonrecurring fair value measurements
Impaired loans	3,626,000	6,280,000
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale
Available-for-sale Securities	71,639,000	104,130,000
US Government Agencies Debt Securities [Member]
Securities available-for-sale
Available-for-sale Securities	71,639,000	104,130,000
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale
Available-for-sale Securities	87,199,000	86,789,000
US States and Political Subdivisions Debt Securities [Member]
Securities available-for-sale
Available-for-sale Securities	87,199,000	86,789,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale
Available-for-sale Securities	139,723,000	107,973,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Securities available-for-sale
Available-for-sale Securities	139,723,000	107,973,000
Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale
Available-for-sale Securities	75,394,000	94,091,000
Collateralized Mortgage Obligations [Member]
Securities available-for-sale
Available-for-sale Securities	75,394,000	94,091,000
Pooled Trust Preferred Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available-for-sale
Available-for-sale Securities	2,069,000	1,962,000
Pooled Trust Preferred Securities [Member]
Securities available-for-sale
Available-for-sale Securities	2,069,000	1,962,000
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale
Available-for-sale Securities	6,021,000	2,502,000
Corporate Debt Securities [Member]
Securities available-for-sale
Available-for-sale Securities	6,021,000	2,502,000
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available-for-sale
Available-for-sale Securities	6,625,000	4,055,000
Equity Securities [Member]
Securities available-for-sale
Available-for-sale Securities	6,625,000	4,055,000
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Nonrecurring fair value measurements
Impaired loans	3,107,000	5,832,000
Impaired Loans [Member]
Nonrecurring fair value measurements
Impaired loans	3,107,000	5,832,000
Mortgage Servicing Rights [Member] | Fair Value, Inputs, Level 3 [Member]
Nonrecurring fair value measurements
Impaired loans	519,000	448,000
Mortgage Servicing Rights [Member]
Nonrecurring fair value measurements
Impaired loans	519,000	448,000
Fair Value, Inputs, Level 1 [Member]
Securities available-for-sale
Available-for-sale Securities	6,625,000	4,055,000
Total recurring fair value measurements	6,625,000	4,055,000
Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale
Available-for-sale Securities	379,976,000	395,485,000
Total recurring fair value measurements	379,976,000	395,485,000
Fair Value, Inputs, Level 3 [Member]
Securities available-for-sale
Available-for-sale Securities	2,069,000	1,962,000
Total recurring fair value measurements	2,069,000	1,962,000
Nonrecurring fair value measurements
Impaired loans	$ 3,626,000	$ 6,280,000