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Note 3 - Loans and Allowance for Loan Losses (Details) - Impaired Loans - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Originated Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | $ 9,541,000 |  | $ 9,541,000 |  | $ 8,255,000
Recorded principal balance, with no related allowance | 8,654,000 |  | 8,654,000 |  | 5,552,000
Average recorded principal balance, with no related allowance | 8,824,000 | $ 11,800,000 | 7,119,000 | $ 7,838,000 |
Unpaid contractual principal balance, with a related allowance | 15,431,000 |  | 15,431,000 |  | 42,757,000
Recorded principal balance, with a related allowance | 10,393,000 |  | 10,393,000 |  | 42,304,000
Related allowance | 1,827,000 |  | 1,827,000 |  | 10,152,000
Average recorded principal balance, with a related allowance | 10,843,000 | 29,611,000 | 26,041,000 | 30,432,000 |
Upaid contractual principal balance | 24,972,000 |  | 24,972,000 |  | 51,012,000
Recorded principal balance | 19,047,000 |  | 19,047,000 |  | 47,856,000
Average recorded principal balance | 19,667,000 | 41,411,000 | 33,160,000 | 38,270,000 |
Acquired Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 8,217,000 |  | 8,217,000 |  | 4,019,000
Recorded principal balance, with no related allowance | 7,732,000 |  | 7,732,000 |  | 4,010,000
Average recorded principal balance, with no related allowance | 7,205,000 | 0 | 5,531,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 318,000 |  | 318,000 |  | 1,516,000
Recorded principal balance, with a related allowance | 318,000 |  | 318,000 |  | 1,502,000
Related allowance | 15,000 |  | 15,000 |  | 605,000
Average recorded principal balance, with a related allowance | 896,000 | 0 | 1,286,000 | 0 |
Upaid contractual principal balance | 8,535,000 |  | 8,535,000 |  | 5,535,000
Recorded principal balance | 8,050,000 |  | 8,050,000 |  | 5,512,000
Average recorded principal balance | 8,101,000 | 0 | 6,817,000 | 0 |
Commercial Portfolio Segment [Member] | Originated Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 7,928,000 |  | 7,928,000 |  | 6,904,000
Recorded principal balance, with no related allowance | 7,729,000 |  | 7,729,000 |  | 4,801,000
Average recorded principal balance, with no related allowance | 7,919,000 | 10,605,000 | 6,298,000 | 6,649,000 |
Unpaid contractual principal balance, with a related allowance | 15,071,000 |  | 15,071,000 |  | 40,448,000
Recorded principal balance, with a related allowance | 10,106,000 |  | 10,106,000 |  | 40,220,000
Related allowance | 1,657,000 |  | 1,657,000 |  | 9,374,000
Average recorded principal balance, with a related allowance | 10,552,000 | 27,430,000 | 25,257,000 | 28,149,000 |
Upaid contractual principal balance | 22,999,000 |  | 22,999,000 |  | 47,352,000
Recorded principal balance | 17,835,000 |  | 17,835,000 |  | 45,021,000
Average recorded principal balance | 18,471,000 | 38,035,000 | 31,555,000 | 34,798,000 |
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Commercial and Industrial [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 1,893,000 |  | 1,893,000 |  | 1,170,000
Recorded principal balance, with no related allowance | 1,893,000 |  | 1,893,000 |  | 1,164,000
Average recorded principal balance, with no related allowance | 1,908,000 | 691,000 | 1,729,000 | 525,000 |
Unpaid contractual principal balance, with a related allowance | 470,000 |  | 470,000 |  | 5,299,000
Recorded principal balance, with a related allowance | 413,000 |  | 413,000 |  | 5,226,000
Related allowance | 271,000 |  | 271,000 |  | 1,578,000
Average recorded principal balance, with a related allowance | 436,000 | 3,087,000 | 2,816,000 | 2,142,000 |
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 | 0 | 111,000 | 101,000 | 232,000 |
Unpaid contractual principal balance, with a related allowance | 2,275,000 |  | 2,275,000 |  | 2,000,000
Recorded principal balance, with a related allowance | 1,920,000 |  | 1,920,000 |  | 2,000,000
Related allowance | 308,000 |  | 308,000 |  | 151,000
Average recorded principal balance, with a related allowance | 2,052,000 | 3,049,000 | 2,026,000 | 3,536,000 |
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 | 302,000 |  | 302,000 |  | 3,609,000
Recorded principal balance, with no related allowance | 103,000 |  | 103,000 |  | 1,901,000
Average recorded principal balance, with no related allowance | 113,000 | 9,227,000 | 1,032,000 | 4,981,000 |
Unpaid contractual principal balance, with a related allowance | 6,377,000 |  | 6,377,000 |  | 15,745,000
Recorded principal balance, with a related allowance | 1,824,000 |  | 1,824,000 |  | 15,674,000
Related allowance | 494,000 |  | 494,000 |  | 2,200,000
Average recorded principal balance, with a related allowance | 1,959,000 | 2,238,000 | 8,778,000 | 1,869,000 |
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 | 5,733,000 |  | 5,733,000 |  | 1,210,000
Recorded principal balance, with no related allowance | 5,733,000 |  | 5,733,000 |  | 1,210,000
Average recorded principal balance, with no related allowance | 5,747,000 | 576,000 | 3,204,000 | 911,000 |
Unpaid contractual principal balance, with a related allowance | 4,897,000 |  | 4,897,000 |  | 16,033,000
Recorded principal balance, with a related allowance | 4,897,000 |  | 4,897,000 |  | 15,949,000
Related allowance | 194,000 |  | 194,000 |  | 4,779,000
Average recorded principal balance, with a related allowance | 4,926,000 | 17,377,000 | 10,371,000 | 18,819,000 |
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 | 0 |  | 0 |  | 375,000
Recorded principal balance, with no related allowance | 0 |  | 0 |  | 317,000
Average recorded principal balance, with no related allowance | 151,000 | 0 | 232,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 1,052,000 |  | 1,052,000 |  | 1,371,000
Recorded principal balance, with a related allowance | 1,052,000 |  | 1,052,000 |  | 1,371,000
Related allowance | 390,000 |  | 390,000 |  | 666,000
Average recorded principal balance, with a related allowance | 1,179,000 | 1,679,000 | 1,266,000 | 1,783,000 |
Commercial Portfolio Segment [Member] | Acquired Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 6,738,000 |  | 6,738,000 |  | 2,512,000
Recorded principal balance, with no related allowance | 6,457,000 |  | 6,457,000 |  | 2,505,000
Average recorded principal balance, with no related allowance | 6,047,000 | 0 | 4,253,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 142,000 |  | 142,000 |  | 1,516,000
Recorded principal balance, with a related allowance | 142,000 |  | 142,000 |  | 1,502,000
Related allowance | 9,000 |  | 9,000 |  | 605,000
Average recorded principal balance, with a related allowance | 667,000 | 0 | 1,101,000 | 0 |
Upaid contractual principal balance | 6,880,000 |  | 6,880,000 |  | 4,028,000
Recorded principal balance | 6,599,000 |  | 6,599,000 |  | 4,007,000
Average recorded principal balance | 6,714,000 | 0 | 5,354,000 | 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 | 1,697,000 |  | 1,697,000 |  | 1,586,000
Recorded principal balance, with no related allowance | 1,661,000 |  | 1,661,000 |  | 1,579,000
Average recorded principal balance, with no related allowance | 1,596,000 | 0 | 1,432,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 66,000 |  | 66,000 |  | 0
Recorded principal balance, with a related allowance | 66,000 |  | 66,000 |  | 0
Related allowance | 5,000 |  | 5,000 |  | 0
Average recorded principal balance, with a related allowance | 73,000 | 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 | 1,593,000 |  | 1,593,000 |  | 113,000
Recorded principal balance, with no related allowance | 1,391,000 |  | 1,391,000 |  | 113,000
Average recorded principal balance, with no related allowance | 910,000 | 0 | 535,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 51,000 |  | 51,000 |  | 1,516,000
Recorded principal balance, with a related allowance | 51,000 |  | 51,000 |  | 1,502,000
Related allowance | 4,000 |  | 4,000 |  | 605,000
Average recorded principal balance, with a related allowance | 568,000 | 0 | 1,016,000 | 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 | 768,000 |  | 768,000 |  | 326,000
Recorded principal balance, with no related allowance | 768,000 |  | 768,000 |  | 326,000
Average recorded principal balance, with no related allowance | 656,000 | 0 | 487,000 | 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 | 2,680,000 |  | 2,680,000 |  | 487,000
Recorded principal balance, with no related allowance | 2,637,000 |  | 2,637,000 |  | 487,000
Average recorded principal balance, with no related allowance | 2,885,000 | 0 | 1,799,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 25,000 |  | 25,000 |  | 0
Recorded principal balance, with a related allowance | 25,000 |  | 25,000 |  | 0
Related allowance | 0 |  | 0 |  | 0
Average recorded principal balance, with a related allowance | 26,000 | 0 | 20,000 | 0 |
Retail Portfolio Segment [Member] | Originated Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 1,613,000 |  | 1,613,000 |  | 1,351,000
Recorded principal balance, with no related allowance | 925,000 |  | 925,000 |  | 751,000
Average recorded principal balance, with no related allowance | 905,000 | 1,195,000 | 821,000 | 1,189,000 |
Unpaid contractual principal balance, with a related allowance | 360,000 |  | 360,000 |  | 2,309,000
Recorded principal balance, with a related allowance | 287,000 |  | 287,000 |  | 2,084,000
Related allowance | 170,000 |  | 170,000 |  | 778,000
Average recorded principal balance, with a related allowance | 291,000 | 2,181,000 | 784,000 | 2,283,000 |
Upaid contractual principal balance | 1,973,000 |  | 1,973,000 |  | 3,660,000
Recorded principal balance | 1,212,000 |  | 1,212,000 |  | 2,835,000
Average recorded principal balance | 1,196,000 | 3,376,000 | 1,605,000 | 3,472,000 |
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 | 214,000 |  | 214,000 |  | 207,000
Recorded principal balance, with no related allowance | 190,000 |  | 190,000 |  | 191,000
Average recorded principal balance, with no related allowance | 189,000 | 642,000 | 190,000 | 598,000 |
Unpaid contractual principal balance, with a related allowance | 195,000 |  | 195,000 |  | 115,000
Recorded principal balance, with a related allowance | 157,000 |  | 157,000 |  | 84,000
Related allowance | 121,000 |  | 121,000 |  | 84,000
Average recorded principal balance, with a related allowance | 160,000 | 88,000 | 143,000 | 139,000 |
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 | 1,399,000 |  | 1,399,000 |  | 1,144,000
Recorded principal balance, with no related allowance | 735,000 |  | 735,000 |  | 560,000
Average recorded principal balance, with no related allowance | 716,000 | 553,000 | 631,000 | 591,000 |
Unpaid contractual principal balance, with a related allowance | 165,000 |  | 165,000 |  | 2,194,000
Recorded principal balance, with a related allowance | 130,000 |  | 130,000 |  | 2,000,000
Related allowance | 49,000 |  | 49,000 |  | 694,000
Average recorded principal balance, with a related allowance | 131,000 | 2,093,000 | 641,000 | 2,144,000 |
Retail Portfolio Segment [Member] | Acquired Loan [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Unpaid contractual principal balance, with no related allowance | 1,479,000 |  | 1,479,000 |  | 1,507,000
Recorded principal balance, with no related allowance | 1,275,000 |  | 1,275,000 |  | 1,505,000
Average recorded principal balance, with no related allowance | 1,158,000 | 0 | 1,278,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 176,000 |  | 176,000 |  | 0
Recorded principal balance, with a related allowance | 176,000 |  | 176,000 |  | 0
Related allowance | 6,000 |  | 6,000 |  | 0
Average recorded principal balance, with a related allowance | 229,000 | 0 | 185,000 | 0 |
Upaid contractual principal balance | 1,655,000 |  | 1,655,000 |  | 1,507,000
Recorded principal balance | 1,451,000 |  | 1,451,000 |  | 1,505,000
Average recorded principal balance | 1,387,000 | 0 | 1,463,000 | 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 | 449,000 |  | 449,000 |  | 641,000
Recorded principal balance, with no related allowance | 322,000 |  | 322,000 |  | 639,000
Average recorded principal balance, with no related allowance | 342,000 | 0 | 423,000 | 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 | 1,030,000 |  | 1,030,000 |  | 866,000
Recorded principal balance, with no related allowance | 953,000 |  | 953,000 |  | 866,000
Average recorded principal balance, with no related allowance | 816,000 | 0 | 855,000 | 0 |
Unpaid contractual principal balance, with a related allowance | 176,000 |  | 176,000 |  | 0
Recorded principal balance, with a related allowance | 176,000 |  | 176,000 |  | 0
Related allowance | 6,000 |  | 6,000 |  | $ 0
Average recorded principal balance, with a related allowance | $ 229,000 | $ 0 | $ 185,000 | $ 0 |

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