Note 9 - Fair Value Measurements and Disclosures (Details) - Quantitative Information about Assets Measured at Fair Value (USD $)			9 Months Ended																		9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Appraisal Adjustments [Member] Impaired Loans [Member]		Sep. 30, 2013 Appraisal Adjustments [Member] Minimum [Member] Impaired Loans [Member]	Sep. 30, 2013 Appraisal Adjustments [Member] Maximum [Member] Impaired Loans [Member]	Sep. 30, 2013 Liquidation Expenses [Member] Impaired Loans [Member]		Sep. 30, 2013 Liquidation Expenses [Member] Minimum [Member] Impaired Loans [Member]	Sep. 30, 2013 Liquidation Expenses [Member] Maximum [Member] Impaired Loans [Member]	Sep. 30, 2013 Remaining Term [Member] Mortgage Servicing Rights [Member]	Sep. 30, 2013 Remaining Term [Member] Minimum [Member] Mortgage Servicing Rights [Member]	Sep. 30, 2013 Remaining Term [Member] Maximum [Member] Mortgage Servicing Rights [Member]	Sep. 30, 2013 Discount Rate [Member] Mortgage Servicing Rights [Member]	Sep. 30, 2013 Discount Rate [Member] Minimum [Member] Mortgage Servicing Rights [Member]	Sep. 30, 2013 Discount Rate [Member] Maximum [Member] Mortgage Servicing Rights [Member]	Sep. 30, 2013 Impaired Loans [Member]	Dec. 31, 2012 Impaired Loans [Member]	Sep. 30, 2013 Mortgage Servicing Rights [Member]	Dec. 31, 2012 Mortgage Servicing Rights [Member]	Sep. 30, 2013 Minimum [Member]	Sep. 30, 2013 Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Nonrecurring (in Dollars)	$ 5,762,000	$ 6,280,000	$ 5,239								$ 523						$ 5,239,000	$ 5,832,000	$ 523,000	$ 448,000
Valuation techniques			Appraisal of collateral (1)	[1]							Discounted cash flow
Unobservable input			Appraisal adjustments (2)	[2]			Liquidation expenses (2)	[2]			Remaining term (yrs)			Discount rate
Value of Range of Values - Minimum					0.00%	(30.00%)			0.00%	(10.00%)					10.00%	12.00%					3.94%	9.38%
Value of Range of Values - Maximum					0.00%	(30.00%)			0.00%	(10.00%)					10.00%	12.00%					3.94%	9.38%
Mortgage servicing rights (in Dollars)	$ 5,762,000	$ 6,280,000	$ 5,239								$ 523						$ 5,239,000	$ 5,832,000	$ 523,000	$ 448,000
Mortgage servicing rights			Appraisal of collateral (1)	[1]							Discounted cash flow
Mortgage servicing rights			Appraisal adjustments (2)	[2]			Liquidation expenses (2)	[2]			Remaining term (yrs)			Discount rate
Mortgage servicing rights												3 years	30 years

[1] Fair value is primarily determined through appraisals of the underlying collateral by independent parties, which generally includes various level 3 inputs which are not always identifiable.

[2] Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range is presented as a percent of the initial appraised value.