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Note 4 - Loans and Allowance for Loan Losses (Details) - Impaired Loans - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2014
Originated Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | $ 9,871,000 |  | $ 9,871,000 |  | $ 8,255,000
Recorded principal balance, with no related allowance | 8,995,000 |  | 8,995,000 |  | 5,552,000
Average recorded principal balance, with no related allowance | 7,137,000 | $ 3,404,000 | 6,609,000 | $ 3,437,000 |
Unpaid contractual principal balance, with a related allowance | 16,312,000 |  | 16,312,000 |  | 42,757,000
Recorded principal balance, with a related allowance | 11,293,000 |  | 11,293,000 |  | 42,304,000
Related allowance | 2,324,000 |  | 2,324,000 |  | 10,152,000
Average recorded principal balance, with a related allowance | 25,732,000 | 28,597,000 | 31,255,000 | 30,187,000 |
Upaid contractual principal balance | 26,183,000 |  | 26,183,000 |  | 51,012,000
Recorded principal balance | 20,288,000 |  | 20,288,000 |  | 47,856,000
Average recorded principal balance | 32,869,000 | 32,001,000 | 37,864,000 | 33,624,000 |
Acquired Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 7,083,000 |  | 7,083,000 |  | 4,019,000
Recorded principal balance, with no related allowance | 6,680,000 |  | 6,680,000 |  | 4,010,000
Average recorded principal balance, with no related allowance | 5,191,000 | 0 | 4,797,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 1,625,000 |  | 1,625,000 |  | 1,516,000
Recorded principal balance, with a related allowance | 1,475,000 |  | 1,475,000 |  | 1,502,000
Related allowance | 584,000 |  | 584,000 |  | 605,000
Average recorded principal balance, with a related allowance | 1,664,000 | 0 | 1,611,000 | 0 |
Upaid contractual principal balance | 8,708,000 |  | 8,708,000 |  | 5,535,000
Recorded principal balance | 8,155,000 |  | 8,155,000 |  | 5,512,000
Average recorded principal balance | 6,855,000 | 0 | 6,408,000 | 0 |
Commercial Portfolio Segment [Member] | Originated Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 8,356,000 |  | 8,356,000 |  | 6,904,000
Recorded principal balance, with no related allowance | 8,110,000 |  | 8,110,000 |  | 4,801,000
Average recorded principal balance, with no related allowance | 6,333,000 | 2,172,000 | 5,822,000 | 2,246,000 |
Unpaid contractual principal balance, with a related allowance | 15,949,000 |  | 15,949,000 |  | 40,448,000
Recorded principal balance, with a related allowance | 10,998,000 |  | 10,998,000 |  | 40,220,000
Related allowance | 2,147,000 |  | 2,147,000 |  | 9,374,000
Average recorded principal balance, with a related allowance | 25,350,000 | 26,370,000 | 30,306,000 | 27,862,000 |
Upaid contractual principal balance | 24,305,000 |  | 24,305,000 |  | 47,352,000
Recorded principal balance | 19,108,000 |  | 19,108,000 |  | 45,021,000
Average recorded principal balance | 31,683,000 | 28,542,000 | 36,128,000 | 30,108,000 |
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Commercial and Industrial [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 1,923,000 |  | 1,923,000 |  | 1,170,000
Recorded principal balance, with no related allowance | 1,923,000 |  | 1,923,000 |  | 1,164,000
Average recorded principal balance, with no related allowance | 1,930,000 | 169,000 | 1,674,000 | 283,000 |
Unpaid contractual principal balance, with a related allowance | 513,000 |  | 513,000 |  | 5,299,000
Recorded principal balance, with a related allowance | 460,000 |  | 460,000 |  | 5,226,000
Related allowance | 436,000 |  | 436,000 |  | 1,578,000
Average recorded principal balance, with a related allowance | 2,812,000 | 882,000 | 3,617,000 | 1,068,000 |
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 0 |  | 0 |  | 540,000
Recorded principal balance, with no related allowance | 0 |  | 0 |  | 209,000
Average recorded principal balance, with no related allowance | 98,000 | 171,000 | 135,000 | 235,000 |
Unpaid contractual principal balance, with a related allowance | 2,530,000 |  | 2,530,000 |  | 2,000,000
Recorded principal balance, with a related allowance | 2,184,000 |  | 2,184,000 |  | 2,000,000
Related allowance | 376,000 |  | 376,000 |  | 151,000
Average recorded principal balance, with a related allowance | 2,092,000 | 3,604,000 | 2,061,000 | 3,782,000 |
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Owner Occupied Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 312,000 |  | 312,000 |  | 3,609,000
Recorded principal balance, with no related allowance | 124,000 |  | 124,000 |  | 1,901,000
Average recorded principal balance, with no related allowance | 1,062,000 | 662,000 | 1,342,000 | 703,000 |
Unpaid contractual principal balance, with a related allowance | 6,646,000 |  | 6,646,000 |  | 15,745,000
Recorded principal balance, with a related allowance | 2,094,000 |  | 2,094,000 |  | 15,674,000
Related allowance | 637,000 |  | 637,000 |  | 2,200,000
Average recorded principal balance, with a related allowance | 8,806,000 | 1,974,000 | 11,095,000 | 1,820,000 |
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Non Owner Occupied Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 5,761,000 |  | 5,761,000 |  | 1,210,000
Recorded principal balance, with no related allowance | 5,761,000 |  | 5,761,000 |  | 1,210,000
Average recorded principal balance, with no related allowance | 2,937,000 | 1,169,000 | 2,362,000 | 1,024,000 |
Unpaid contractual principal balance, with a related allowance | 4,955,000 |  | 4,955,000 |  | 16,033,000
Recorded principal balance, with a related allowance | 4,955,000 |  | 4,955,000 |  | 15,949,000
Related allowance | 206,000 |  | 206,000 |  | 4,779,000
Average recorded principal balance, with a related allowance | 10,319,000 | 18,591,000 | 12,195,000 | 19,418,000 |
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 360,000 |  | 360,000 |  | 375,000
Recorded principal balance, with no related allowance | 302,000 |  | 302,000 |  | 317,000
Average recorded principal balance, with no related allowance | 306,000 | 1,000 | 309,000 | 1,000 |
Unpaid contractual principal balance, with a related allowance | 1,305,000 |  | 1,305,000 |  | 1,371,000
Recorded principal balance, with a related allowance | 1,305,000 |  | 1,305,000 |  | 1,371,000
Related allowance | 492,000 |  | 492,000 |  | 666,000
Average recorded principal balance, with a related allowance | 1,321,000 | 1,319,000 | 1,338,000 | 1,774,000 |
Commercial Portfolio Segment [Member] | Acquired Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 5,795,000 |  | 5,795,000 |  | 2,512,000
Recorded principal balance, with no related allowance | 5,639,000 |  | 5,639,000 |  | 2,505,000
Average recorded principal balance, with no related allowance | 4,025,000 | 0 | 3,518,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 1,283,000 |  | 1,283,000 |  | 1,516,000
Recorded principal balance, with a related allowance | 1,193,000 |  | 1,193,000 |  | 1,502,000
Related allowance | 571,000 |  | 571,000 |  | 605,000
Average recorded principal balance, with a related allowance | 1,381,000 | 0 | 1,422,000 | 0 |
Upaid contractual principal balance | 7,078,000 |  | 7,078,000 |  | 4,028,000
Recorded principal balance | 6,832,000 |  | 6,832,000 |  | 4,007,000
Average recorded principal balance | 5,406,000 | 0 | 4,940,000 | 0 |
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Commercial and Industrial [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 1,565,000 |  | 1,565,000 |  | 1,586,000
Recorded principal balance, with no related allowance | 1,532,000 |  | 1,532,000 |  | 1,579,000
Average recorded principal balance, with no related allowance | 1,244,000 | 0 | 1,356,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 80,000 |  | 80,000 |  | 0
Recorded principal balance, with a related allowance | 80,000 |  | 80,000 |  | 0
Related allowance | 9,000 |  | 9,000 |  | 0
Average recorded principal balance, with a related allowance | 97,000 | 0 | 65,000 | 0 |
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 0 |  | 0 |  | 0
Recorded principal balance, with no related allowance | 0 |  | 0 |  | 0
Average recorded principal balance, with no related allowance | 0 | 0 | 0 | 0 |
Unpaid contractual principal balance, with a related allowance | 0 |  | 0 |  | 0
Recorded principal balance, with a related allowance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
Average recorded principal balance, with a related allowance | 0 | 0 | 0 | 0 |
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Owner Occupied Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 492,000 |  | 492,000 |  | 113,000
Recorded principal balance, with no related allowance | 429,000 |  | 429,000 |  | 113,000
Average recorded principal balance, with no related allowance | 317,000 | 0 | 249,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 1,177,000 |  | 1,177,000 |  | 1,516,000
Recorded principal balance, with a related allowance | 1,086,000 |  | 1,086,000 |  | 1,502,000
Related allowance | 561,000 |  | 561,000 |  | 605,000
Average recorded principal balance, with a related allowance | 1,256,000 | 0 | 1,338,000 | 0 |
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Non Owner Occupied Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 586,000 |  | 586,000 |  | 326,000
Recorded principal balance, with no related allowance | 545,000 |  | 545,000 |  | 326,000
Average recorded principal balance, with no related allowance | 427,000 | 0 | 393,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 0 |  | 0 |  | 0
Recorded principal balance, with a related allowance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
Average recorded principal balance, with a related allowance | 0 | 0 | 0 | 0 |
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 3,152,000 |  | 3,152,000 |  | 487,000
Recorded principal balance, with no related allowance | 3,133,000 |  | 3,133,000 |  | 487,000
Average recorded principal balance, with no related allowance | 2,037,000 | 0 | 1,520,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 26,000 |  | 26,000 |  | 0
Recorded principal balance, with a related allowance | 27,000 |  | 27,000 |  | 0
Related allowance | 1,000 |  | 1,000 |  | 0
Average recorded principal balance, with a related allowance | 28,000 | 0 | 19,000 | 0 |
Retail Portfolio Segment [Member] | Originated Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 1,515,000 |  | 1,515,000 |  | 1,351,000
Recorded principal balance, with no related allowance | 885,000 |  | 885,000 |  | 751,000
Average recorded principal balance, with no related allowance | 804,000 | 1,232,000 | 787,000 | 1,191,000 |
Unpaid contractual principal balance, with a related allowance | 363,000 |  | 363,000 |  | 2,309,000
Recorded principal balance, with a related allowance | 295,000 |  | 295,000 |  | 2,084,000
Related allowance | 177,000 |  | 177,000 |  | 778,000
Average recorded principal balance, with a related allowance | 382,000 | 2,227,000 | 949,000 | 2,325,000 |
Upaid contractual principal balance | 1,878,000 |  | 1,878,000 |  | 3,660,000
Recorded principal balance | 1,180,000 |  | 1,180,000 |  | 2,835,000
Average recorded principal balance | 1,186,000 | 3,459,000 | 1,736,000 | 3,516,000 |
Retail Portfolio Segment [Member] | Originated Loan [Member] | Home Equity and Other [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 206,000 |  | 206,000 |  | 207,000
Recorded principal balance, with no related allowance | 188,000 |  | 188,000 |  | 191,000
Average recorded principal balance, with no related allowance | 189,000 | 647,000 | 190,000 | 585,000 |
Unpaid contractual principal balance, with a related allowance | 198,000 |  | 198,000 |  | 115,000
Recorded principal balance, with a related allowance | 163,000 |  | 163,000 |  | 84,000
Related allowance | 126,000 |  | 126,000 |  | 84,000
Average recorded principal balance, with a related allowance | 165,000 | 91,000 | 138,000 | 157,000 |
Retail Portfolio Segment [Member] | Originated Loan [Member] | 1-4 Family Mortgages [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 1,309,000 |  | 1,309,000 |  | 1,144,000
Recorded principal balance, with no related allowance | 697,000 |  | 697,000 |  | 560,000
Average recorded principal balance, with no related allowance | 615,000 | 585,000 | 597,000 | 606,000 |
Unpaid contractual principal balance, with a related allowance | 165,000 |  | 165,000 |  | 2,194,000
Recorded principal balance, with a related allowance | 132,000 |  | 132,000 |  | 2,000,000
Related allowance | 51,000 |  | 51,000 |  | 694,000
Average recorded principal balance, with a related allowance | 217,000 | 2,136,000 | 811,000 | 2,168,000 |
Retail Portfolio Segment [Member] | Acquired Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 1,288,000 |  | 1,288,000 |  | 1,507,000
Recorded principal balance, with no related allowance | 1,041,000 |  | 1,041,000 |  | 1,505,000
Average recorded principal balance, with no related allowance | 1,166,000 | 0 | 1,279,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 342,000 |  | 342,000 |  | 0
Recorded principal balance, with a related allowance | 282,000 |  | 282,000 |  | 0
Related allowance | 13,000 |  | 13,000 |  | 0
Average recorded principal balance, with a related allowance | 283,000 | 0 | 189,000 | 0 |
Upaid contractual principal balance | 1,630,000 |  | 1,630,000 |  | 1,507,000
Recorded principal balance | 1,323,000 |  | 1,323,000 |  | 1,505,000
Average recorded principal balance | 1,449,000 | 0 | 1,468,000 | 0 |
Retail Portfolio Segment [Member] | Acquired Loan [Member] | Home Equity and Other [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 485,000 |  | 485,000 |  | 641,000
Recorded principal balance, with no related allowance | 361,000 |  | 361,000 |  | 639,000
Average recorded principal balance, with no related allowance | 365,000 | 0 | 456,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 0 |  | 0 |  | 0
Recorded principal balance, with a related allowance | 0 |  | 0 |  | 0
Related allowance | 0 |  | 0 |  | 0
Average recorded principal balance, with a related allowance | 0 | 0 | 0 | 0 |
Retail Portfolio Segment [Member] | Acquired Loan [Member] | 1-4 Family Mortgages [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 803,000 |  | 803,000 |  | 866,000
Recorded principal balance, with no related allowance | 680,000 |  | 680,000 |  | 866,000
Average recorded principal balance, with no related allowance | 801,000 | 0 | 823,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 342,000 |  | 342,000 |  | 0
Recorded principal balance, with a related allowance | 282,000 |  | 282,000 |  | 0
Related allowance | 13,000 |  | 13,000 |  | $ 0
Average recorded principal balance, with a related allowance | $ 283,000 | $ 0 | $ 189,000 | $ 0 |

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