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Note 5 - Loans and Allowance for Loan Losses - Loans Restructured as TDRs, Excluding Loans Acquired, Segregated by Class of Loans (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($)
Number of Loans | 1 | 21 | 13 | 67
Balance Prior to TDR | $ 608,000 | $ 3,011,000 | $ 9,237,000 | $ 13,372,000
Balance | 607,000 | 2,923,000 | 9,225,000 | 13,222,000
Financial Impact on Date of Restructure |  |  | 33,000 |
Extended Maturity [Member] |  |  |  |
Balance | 607,000 | 2,155,000 | 9,186,000 | 11,536,000
Contractual Interest Rate Reduction [Member] |  |  |  |
Balance |  | $ 768,000 | $ 39,000 | $ 1,686,000
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Number of Loans |  | 15 | 3 | 49
Balance Prior to TDR |  | $ 1,577,000 | $ 7,818,000 | $ 11,335,000
Balance |  | 1,528,000 | 7,818,000 | 11,252,000
Financial Impact on Date of Restructure |  |  | 33,000 |
Commercial Real Estate Portfolio Segment [Member] | Extended Maturity [Member] |  |  |  |
Balance |  | 760,000 | 7,818,000 | 9,566,000
Commercial Real Estate Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |
Balance |  | $ 768,000 |  | $ 1,686,000
Commercial Real Estate Portfolio Segment [Member] | Commercial Loans [Member] |  |  |  |
Number of Loans | 1 |  |  |
Balance Prior to TDR | $ 608,000 |  |  |
Balance | 607,000 |  |  |
Financial Impact on Date of Restructure |  |  |  |
Commercial Real Estate Portfolio Segment [Member] | Commercial Loans [Member] | Extended Maturity [Member] |  |  |  |
Balance | 607,000 |  |  |
Commercial Real Estate Portfolio Segment [Member] | Commercial Loans [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |
Balance |  |  |  |
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] |  |  |  |
Number of Loans |  | 13 | 1 | 22
Balance Prior to TDR |  | $ 742,000 | $ 456,000 | $ 1,538,000
Balance |  | 694,000 | 456,000 | 1,487,000
Financial Impact on Date of Restructure |  |  |  |
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Extended Maturity [Member] |  |  |  |
Balance |  | 694,000 | 456,000 | 933,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |
Balance |  |  |  | $ 554,000
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] |  |  |  |
Number of Loans |  | 2 | 2 | 27
Balance Prior to TDR |  | $ 835,000 | $ 7,362,000 | $ 9,797,000
Balance |  | 834,000 | 7,362,000 | 9,765,000
Financial Impact on Date of Restructure |  |  | 33,000 |
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Extended Maturity [Member] |  |  |  |
Balance |  | 66,000 | 7,362,000 | 8,633,000
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |
Balance |  | $ 768,000 |  | $ 1,132,000
Commercial Portfolio Segment [Member] |  |  |  |
Number of Loans | 1 | 5 | 10 | 16
Balance Prior to TDR | $ 608,000 | $ 1,387,000 | $ 1,419,000 | $ 1,987,000
Balance | 607,000 | 1,387,000 | 1,407,000 | 1,959,000
Financial Impact on Date of Restructure |  |  |  |
Commercial Portfolio Segment [Member] | Extended Maturity [Member] |  |  |  |
Balance | 607,000 | 1,387,000 | 1,368,000 | 1,959,000
Commercial Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |
Balance |  |  | $ 39,000 |
Commercial Portfolio Segment [Member] | Commercial Loans [Member] |  |  |  |
Number of Loans |  | 5 | 10 | 16
Balance Prior to TDR |  | $ 1,387,000 | $ 1,419,000 | $ 1,987,000
Balance |  | 1,387,000 | 1,407,000 | 1,959,000
Financial Impact on Date of Restructure |  |  |  |
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Extended Maturity [Member] |  |  |  |
Balance |  | 1,387,000 | 1,368,000 | 1,959,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |
Balance |  |  | $ 39,000 |
Consumer Portfolio Segment [Member] |  |  |  |
Number of Loans |  | 1 |  | 2
Balance Prior to TDR |  | $ 47,000 |  | $ 50,000
Balance |  | 8,000 |  | 11,000
Financial Impact on Date of Restructure |  |  |  |
Consumer Portfolio Segment [Member] | Extended Maturity [Member] |  |  |  |
Balance |  | 8,000 |  | 11,000
Consumer Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |
Balance |  |  |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] |  |  |  |
Number of Loans |  | 1 |  | 2
Balance Prior to TDR |  | $ 47,000 |  | $ 50,000
Balance |  | 8,000 |  | 11,000
Financial Impact on Date of Restructure |  |  |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] | Extended Maturity [Member] |  |  |  |
Balance |  | 8,000 |  | 11,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |
Balance |  |  |  |

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