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Note 3 - Loans and Allowance for Loan Losses - Impaired Loans (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Originated Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | $ 1,472,000 |  | $ 1,472,000 |  | $ 1,509,000
With no related allowance recorded, principal balance | 1,472,000 |  | 1,472,000 |  | 1,501,000
With no related allowance recorded, average recorded principal balance | 1,809,000 | $ 1,908,000 | 1,752,000 | $ 1,729,000 |
With related allowance recorded, unpaid principal balance | 222,000 |  | 222,000 |  | 352,000
With related allowance recorded, principal balance | 171,000 |  | 171,000 |  | 305,000
Related allowance | 38,000 |  | 38,000 |  | 165,000
With related allowance recorded, average recorded principal balance | 185,000 | 436,000 | 227,000 | 2,816,000 |
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Acquired Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 1,000,000 |  | 1,000,000 |  | 1,528,000
With no related allowance recorded, principal balance | 973,000 |  | 973,000 |  | 1,494,000
With no related allowance recorded, average recorded principal balance | 1,327,000 | 1,596,000 | 1,395,000 | 1,432,000 |
With related allowance recorded, unpaid principal balance | 352,000 |  | 352,000 |  | 383,000
With related allowance recorded, principal balance | 331,000 |  | 331,000 |  | 376,000
Related allowance | 98,000 |  | 98,000 |  | 102,000
With related allowance recorded, average recorded principal balance | 343,000 | 73,000 | 361,000 | 65,000 |
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Originated Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With no related allowance recorded, principal balance | 0 |  | 0 |  | 0
With no related allowance recorded, average recorded principal balance | 0 | 0 | 0 | 101,000 |
With related allowance recorded, unpaid principal balance | 1,493,000 |  | 1,493,000 |  | 2,017,000
With related allowance recorded, principal balance | 1,109,000 |  | 1,109,000 |  | 1,655,000
Related allowance | 44,000 |  | 44,000 |  | 245,000
With related allowance recorded, average recorded principal balance | 1,367,000 | 2,052,000 | 1,507,000 | 2,026,000 |
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Acquired Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With no related allowance recorded, principal balance | 0 |  | 0 |  | 0
With no related allowance recorded, average recorded principal balance | 0 | 0 | 0 | 0 |
With related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With related allowance recorded, principal balance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
With related allowance recorded, average recorded principal balance | 0 | 0 | 0 | 0 |
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Originated Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 503,000 |  | 503,000 |  | 712,000
With no related allowance recorded, principal balance | 404,000 |  | 404,000 |  | 505,000
With no related allowance recorded, average recorded principal balance | 327,000 | 113,000 | 307,000 | 1,032,000 |
With related allowance recorded, unpaid principal balance | 5,907,000 |  | 5,907,000 |  | 5,867,000
With related allowance recorded, principal balance | 1,354,000 |  | 1,354,000 |  | 1,314,000
Related allowance | 232,000 |  | 232,000 |  | 242,000
With related allowance recorded, average recorded principal balance | 1,366,000 | 1,959,000 | 1,337,000 | 8,778,000 |
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Acquired Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 809,000 |  | 809,000 |  | 2,233,000
With no related allowance recorded, principal balance | 741,000 |  | 741,000 |  | 1,952,000
With no related allowance recorded, average recorded principal balance | 1,021,000 | 910,000 | 1,416,000 | 535,000 |
With related allowance recorded, unpaid principal balance | 49,000 |  | 49,000 |  | 51,000
With related allowance recorded, principal balance | 49,000 |  | 49,000 |  | 51,000
Related allowance | 4,000 |  | 4,000 |  | 4,000
With related allowance recorded, average recorded principal balance | 49,000 | 568,000 | 49,000 | 1,016,000 |
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Originated Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 5,610,000 |  | 5,610,000 |  | 5,696,000
With no related allowance recorded, principal balance | 5,610,000 |  | 5,610,000 |  | 5,696,000
With no related allowance recorded, average recorded principal balance | 5,616,000 | 5,747,000 | 5,647,000 | 3,204,000 |
With related allowance recorded, unpaid principal balance | 4,635,000 |  | 4,635,000 |  | 4,841,000
With related allowance recorded, principal balance | 4,635,000 |  | 4,635,000 |  | 4,841,000
Related allowance | 177,000 |  | 177,000 |  | 201,000
With related allowance recorded, average recorded principal balance | 4,670,000 | 4,926,000 | 4,734,000 | 10,371,000 |
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Acquired Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 1,112,000 |  | 1,112,000 |  | 880,000
With no related allowance recorded, principal balance | 1,111,000 |  | 1,111,000 |  | 880,000
With no related allowance recorded, average recorded principal balance | 961,000 | 656,000 | 894,000 | 487,000 |
With related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With related allowance recorded, principal balance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
With related allowance recorded, average recorded principal balance | 0 | 0 | 0 | 0 |
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residentia lRental Loan [Member] | Originated Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With no related allowance recorded, principal balance | 0 |  | 0 |  | 0
With no related allowance recorded, average recorded principal balance | 0 | 151,000 | 0 | 232,000 |
With related allowance recorded, unpaid principal balance | 953,000 |  | 953,000 |  | 1,028,000
With related allowance recorded, principal balance | 953,000 |  | 953,000 |  | 1,028,000
Related allowance | 263,000 |  | 263,000 |  | 365,000
With related allowance recorded, average recorded principal balance | 966,000 | 1,179,000 | 992,000 | 1,266,000 |
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residentia lRental Loan [Member] | Acquired Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 485,000 |  | 485,000 |  | 452,000
With no related allowance recorded, principal balance | 360,000 |  | 360,000 |  | 404,000
With no related allowance recorded, average recorded principal balance | 327,000 | 2,885,000 | 335,000 | 1,799,000 |
With related allowance recorded, unpaid principal balance | 2,000 |  | 2,000 |  | 23,000
With related allowance recorded, principal balance | 2,000 |  | 2,000 |  | 23,000
Related allowance | 1,000 |  | 1,000 |  | 0
With related allowance recorded, average recorded principal balance | 11,000 | 26,000 | 16,000 | 20,000 |
Commercial Portfolio Segment [Member] | Originated Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 7,585,000 |  | 7,585,000 |  | 7,917,000
With no related allowance recorded, principal balance | 7,486,000 |  | 7,486,000 |  | 7,702,000
With no related allowance recorded, average recorded principal balance | 7,752,000 | 7,919,000 | 7,706,000 | 6,298,000 |
With related allowance recorded, unpaid principal balance | 13,210,000 |  | 13,210,000 |  | 14,105,000
With related allowance recorded, principal balance | 8,222,000 |  | 8,222,000 |  | 9,143,000
Related allowance | 754,000 |  | 754,000 |  | 1,218,000
With related allowance recorded, average recorded principal balance | 8,554,000 | 10,552,000 | 8,797,000 | 25,257,000 |
Total unpaid principal balance | 20,795,000 |  | 20,795,000 |  | 22,022,000
Total principal balance | 15,708,000 |  | 15,708,000 |  | 16,845,000
Total average recorded principal balance | 16,306,000 | 18,471,000 | 16,503,000 | 31,555,000 |
Commercial Portfolio Segment [Member] | Acquired Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 3,406,000 |  | 3,406,000 |  | 5,093,000
With no related allowance recorded, principal balance | 3,185,000 |  | 3,185,000 |  | 4,730,000
With no related allowance recorded, average recorded principal balance | 3,636,000 | 6,047,000 | 4,040,000 | 4,253,000 |
With related allowance recorded, unpaid principal balance | 403,000 |  | 403,000 |  | 457,000
With related allowance recorded, principal balance | 382,000 |  | 382,000 |  | 450,000
Related allowance | 103,000 |  | 103,000 |  | 106,000
With related allowance recorded, average recorded principal balance | 403,000 | 667,000 | 426,000 | 1,101,000 |
Total unpaid principal balance | 3,809,000 |  | 3,809,000 |  | 5,550,000
Total principal balance | 3,567,000 |  | 3,567,000 |  | 5,180,000
Total average recorded principal balance | 4,039,000 | 6,714,000 | 4,466,000 | 5,354,000 |
Retail Portfolio Segment [Member] | Home Equity and Other [Member] | Originated Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 122,000 |  | 122,000 |  | 14,000
With no related allowance recorded, principal balance | 116,000 |  | 116,000 |  | 5,000
With no related allowance recorded, average recorded principal balance | 118,000 | 189,000 | 63,000 | 190,000 |
With related allowance recorded, unpaid principal balance | 632,000 |  | 632,000 |  | 600,000
With related allowance recorded, principal balance | 590,000 |  | 590,000 |  | 562,000
Related allowance | 217,000 |  | 217,000 |  | 209,000
With related allowance recorded, average recorded principal balance | 551,000 | 160,000 | 534,000 | 143,000 |
Retail Portfolio Segment [Member] | Home Equity and Other [Member] | Acquired Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 497,000 |  | 497,000 |  | 471,000
With no related allowance recorded, principal balance | 329,000 |  | 329,000 |  | 310,000
With no related allowance recorded, average recorded principal balance | 347,000 | 342,000 | 320,000 | 423,000 |
With related allowance recorded, unpaid principal balance | 0 |  | 0 |  | 0
With related allowance recorded, principal balance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
With related allowance recorded, average recorded principal balance | 0 | 0 | 0 | 0 |
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Originated Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 1,191,000 |  | 1,191,000 |  | 1,328,000
With no related allowance recorded, principal balance | 567,000 |  | 567,000 |  | 657,000
With no related allowance recorded, average recorded principal balance | 618,000 | 716,000 | 616,000 | 631,000 |
With related allowance recorded, unpaid principal balance | 205,000 |  | 205,000 |  | 165,000
With related allowance recorded, principal balance | 160,000 |  | 160,000 |  | 128,000
Related allowance | 69,000 |  | 69,000 |  | 47,000
With related allowance recorded, average recorded principal balance | 162,000 | 131,000 | 144,000 | 641,000 |
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Acquired Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 1,697,000 |  | 1,697,000 |  | 1,804,000
With no related allowance recorded, principal balance | 1,309,000 |  | 1,309,000 |  | 1,548,000
With no related allowance recorded, average recorded principal balance | 1,307,000 | 816,000 | 1,359,000 | 855,000 |
With related allowance recorded, unpaid principal balance | 173,000 |  | 173,000 |  | 175,000
With related allowance recorded, principal balance | 173,000 |  | 173,000 |  | 175,000
Related allowance | 5,000 |  | 5,000 |  | 6,000
With related allowance recorded, average recorded principal balance | 174,000 | 229,000 | 131,000 | 185,000 |
Retail Portfolio Segment [Member] | Originated Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 1,313,000 |  | 1,313,000 |  | 1,342,000
With no related allowance recorded, principal balance | 683,000 |  | 683,000 |  | 662,000
With no related allowance recorded, average recorded principal balance | 736,000 | 905,000 | 679,000 | 821,000 |
With related allowance recorded, unpaid principal balance | 837,000 |  | 837,000 |  | 765,000
With related allowance recorded, principal balance | 750,000 |  | 750,000 |  | 690,000
Related allowance | 286,000 |  | 286,000 |  | 256,000
With related allowance recorded, average recorded principal balance | 713,000 | 291,000 | 678,000 | 784,000 |
Total unpaid principal balance | 2,150,000 |  | 2,150,000 |  | 2,107,000
Total principal balance | 1,433,000 |  | 1,433,000 |  | 1,352,000
Total average recorded principal balance | 1,449,000 | 1,196,000 | 1,357,000 | 1,605,000 |
Retail Portfolio Segment [Member] | Acquired Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 2,194,000 |  | 2,194,000 |  | 2,275,000
With no related allowance recorded, principal balance | 1,638,000 |  | 1,638,000 |  | 1,858,000
With no related allowance recorded, average recorded principal balance | 1,654,000 | 1,158,000 | 1,679,000 | 1,278,000 |
With related allowance recorded, unpaid principal balance | 173,000 |  | 173,000 |  | 175,000
With related allowance recorded, principal balance | 173,000 |  | 173,000 |  | 175,000
Related allowance | 5,000 |  | 5,000 |  | 6,000
With related allowance recorded, average recorded principal balance | 174,000 | 229,000 | 131,000 | 185,000 |
Total unpaid principal balance | 2,367,000 |  | 2,367,000 |  | 2,450,000
Total principal balance | 1,811,000 |  | 1,811,000 |  | 2,033,000
Total average recorded principal balance | 1,828,000 | 1,387,000 | 1,810,000 | 1,463,000 |
Originated Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 8,898,000 |  | 8,898,000 |  | 9,259,000
With no related allowance recorded, principal balance | 8,169,000 |  | 8,169,000 |  | 8,364,000
With no related allowance recorded, average recorded principal balance | 8,488,000 | 8,824,000 | 8,385,000 | 7,119,000 |
With related allowance recorded, unpaid principal balance | 14,047,000 |  | 14,047,000 |  | 14,870,000
With related allowance recorded, principal balance | 8,972,000 |  | 8,972,000 |  | 9,833,000
Related allowance | 1,040,000 |  | 1,040,000 |  | 1,474,000
With related allowance recorded, average recorded principal balance | 9,267,000 | 10,843,000 | 9,475,000 | 26,041,000 |
Total unpaid principal balance | 22,945,000 |  | 22,945,000 |  | 24,129,000
Total principal balance | 17,141,000 |  | 17,141,000 |  | 18,197,000
Total average recorded principal balance | 17,755,000 | 19,667,000 | 17,860,000 | 33,160,000 |
Acquired Loan [Member] |  |  |  |  |
With no related allowance recorded, unpaid principal balance | 5,600,000 |  | 5,600,000 |  | 7,368,000
With no related allowance recorded, principal balance | 4,823,000 |  | 4,823,000 |  | 6,588,000
With no related allowance recorded, average recorded principal balance | 5,290,000 | 7,205,000 | 5,719,000 | 5,531,000 |
With related allowance recorded, unpaid principal balance | 576,000 |  | 576,000 |  | 632,000
With related allowance recorded, principal balance | 555,000 |  | 555,000 |  | 625,000
Related allowance | 108,000 |  | 108,000 |  | 112,000
With related allowance recorded, average recorded principal balance | 577,000 | 896,000 | 557,000 | 1,286,000 |
Total unpaid principal balance | 6,176,000 |  | 6,176,000 |  | 8,000,000
Total principal balance | 5,378,000 |  | 5,378,000 |  | $ 7,213,000
Total average recorded principal balance | $ 5,867,000 | $ 8,101,000 | $ 6,276,000 | $ 6,817,000 |

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