Note 5 - Allowances for Loan Losses (Details) - Non-accrual Loans - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Note 5 - Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	$ 12,622	$ 21,440
Commercial Real Estate Portfolio Segment [Member]
Note 5 - Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	5,913	13,979
Construction and Land Development Portfolio Segment [Member]
Note 5 - Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	117	377
Commercial Portfolio Segment [Member]
Note 5 - Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	3,156	4,349
Owner Occupied Real Estate [Member]
Note 5 - Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	2,894	2,306
Consumer Portfolio Segment [Member]
Note 5 - Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	542	429
Residential Portfolio Segment [Member]
Note 5 - Allowances for Loan Losses (Details) - Non-accrual Loans [Line Items]
Non-accrual loans	$ 0	$ 0