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Note 4 - Loans and Allowance for Loan Losses - Troubled Debt Restructurings, Excluding Loans Acquired, Segregated by Class of Loans (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Financing Receivable, Modifications, Number of Contracts | 70 | 18
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 2 | 1
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 51 | 12
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 23 | 11
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 17 | 5
Loans, Excluding Acquired Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 79 | 25
Troubled debt, balance | $ 14,174 | $ 5,561
Loans, Excluding Acquired Loans [Member] | Consumer Portfolio Segment [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 1 | 1
Troubled debt, balance | $ 3 | $ 13
Loans, Excluding Acquired Loans [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 1 | 1
Troubled debt, balance | $ 3 | $ 13
Loans, Excluding Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 58 | 19
Troubled debt, balance | $ 12,091 | $ 5,216
Loans, Excluding Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Other Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 25 | 5
Troubled debt, balance | $ 9,828 | $ 3,491
Loans, Excluding Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 1 | 1
Troubled debt, balance | $ 18 | $ 253
Loans, Excluding Acquired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 32 | 13
Troubled debt, balance | $ 2,245 | $ 1,472
Loans, Excluding Acquired Loans [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 20 | 5
Troubled debt, balance | $ 2,080 | $ 332
Loans, Excluding Acquired Loans [Member] | Commercial Portfolio Segment [Member] | Commercial Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 20 | 5
Troubled debt, balance | $ 2,080 | $ 332
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 41 | 6
Troubled debt, balance | $ 10,998 | $ 3,031
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Consumer Portfolio Segment [Member] |  |
Financing Receivable, Modifications, Number of Contracts |  |
Troubled debt, balance |  |
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts |  |
Troubled debt, balance |  |
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 26 | 6
Troubled debt, balance | $ 9,215 | $ 3,031
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Other Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 23 | 4
Troubled debt, balance | $ 9,048 | $ 2,894
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts |  |
Troubled debt, balance |  |
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 3 | 2
Troubled debt, balance | $ 167 | $ 137
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 15 |
Troubled debt, balance | $ 1,783 |
Loans, Excluding Acquired Loans [Member] | Performing Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Commercial Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 15 |
Troubled debt, balance | $ 1,783 |
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 38 | 19
Troubled debt, balance | $ 3,176 | $ 2,530
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Consumer Portfolio Segment [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 1 | 1
Troubled debt, balance | $ 3 | $ 13
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Consumer Portfolio Segment [Member] | Other Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 1 | 1
Troubled debt, balance | $ 3 | $ 13
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 32 | 13
Troubled debt, balance | $ 2,876 | $ 2,185
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Other Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 2 | 1
Troubled debt, balance | $ 780 | $ 597
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 1 | 1
Troubled debt, balance | $ 18 | $ 253
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 29 | 11
Troubled debt, balance | $ 2,078 | $ 1,335
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 5 | 5
Troubled debt, balance | $ 297 | $ 332
Loans, Excluding Acquired Loans [Member] | Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Commercial Loans [Member] |  |
Financing Receivable, Modifications, Number of Contracts | 5 | 5
Troubled debt, balance | $ 297 | $ 332

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