Note 11 - Derivatives and Risk Management Activities - Amounts Recorded in Statement to Financial Condition (Details) - Not Designated as Hedging Instrument [Member] $ in Thousands	Sep. 30, 2016 USD ($)
Other Assets [Member] | Interest Rate Lock Commitments [Member]
Derivative Asset, Fair Value	$ 1,027
Derivative Asset, Notional Amount	36,090
Other Assets [Member] | Best Efforts Forward Loan sales Commitments [Member]
Derivative Asset, Fair Value
Derivative Asset, Notional Amount	546
Other Assets [Member] | Mandatory Forward Loan Sales Commitments [Member]
Derivative Asset, Fair Value
Derivative Asset, Notional Amount	164
Other Liabilities [Member] | Interest Rate Lock Commitments [Member]
Derivative Liability, Fair Value	9
Derivative Liability, Notional Amount	1,502
Other Liabilities [Member] | Best Efforts Forward Loan sales Commitments [Member]
Derivative Liability, Fair Value	377
Derivative Liability, Notional Amount	37,046
Other Liabilities [Member] | Mandatory Forward Loan Sales Commitments [Member]
Derivative Liability, Fair Value	294
Derivative Liability, Notional Amount	$ 25,525