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Note 3 - Loans and Allowance for Loan Losses - Activity in Allowance for Loan Losses and the Recorded Investments in Loans (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Provision for loan losses | $ 700,000 | $ 400,000 | $ 2,450,000 | $ 1,100,000 |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,933,013,000 |  | 2,933,013,000 |  | $ 2,753,085,000
Originated Loan [Member] |  |  |  |  |
Beginning balance | 23,331,000 | 20,482,000 | 21,554,000 | 19,133,000 |
Provision for loan losses | 740,000 | 473,000 | 2,607,000 | 605,000 |
Charge-offs | (519,000) | (169,000) | (771,000) | (835,000) |
Recoveries | 180,000 | 290,000 | 342,000 | 2,173,000 |
Ending balance | 23,732,000 | 21,076,000 | 23,732,000 | 21,076,000 |
Ending balance: individually evaluated for impairment | 2,025,000 | 998,000 | 2,025,000 | 998,000 |
Ending balance: collectively evaluated for impairment | 21,707,000 | 20,078,000 | 21,707,000 | 20,078,000 |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,690,177,000 |  | 2,690,177,000 |  | 2,452,446,000
Ending balance: individually evaluated for impairment | 27,662,000 |  | 27,662,000 |  | 18,882,000
Ending balance: collectively evaluated for impairment | 2,662,515,000 |  | 2,662,515,000 |  | 2,433,564,000
Acquired Loan [Member] |  |  |  |  |
Beginning balance | 722,000 | 685,000 | 826,000 | 368,000 |
Provision for loan losses | (40,000) | (73,000) | (157,000) | 495,000 |
Charge-offs | 0 | 0 | 0 | (261,000) |
Recoveries | 0 | 4,000 | 13,000 | 14,000 |
Ending balance | 682,000 | 616,000 | 682,000 | 616,000 |
Loans and Leases Receivable, Net of Deferred Income, Total | 242,836,000 |  | 242,836,000 |  | 300,639,000
Commercial Portfolio Segment [Member] |  |  |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,508,367,000 |  | 2,508,367,000 |  | 2,360,106,000
Commercial Portfolio Segment [Member] | Originated Loan [Member] |  |  |  |  |
Beginning balance | 21,073,000 | 18,326,000 | 19,442,000 | 16,456,000 |
Provision for loan losses | 522,000 | 371,000 | 2,080,000 | 922,000 |
Charge-offs | (405,000) | 0 | (407,000) | (342,000) |
Recoveries | 96,000 | 63,000 | 171,000 | 1,724,000 |
Ending balance | 21,286,000 | 18,760,000 | 21,286,000 | 18,760,000 |
Ending balance: individually evaluated for impairment | 1,699,000 | 750,000 | 1,699,000 | 750,000 |
Ending balance: collectively evaluated for impairment | 19,587,000 | 18,010,000 | 19,587,000 | 18,010,000 |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,341,797,000 |  | 2,341,797,000 |  | 2,151,998,000
Ending balance: individually evaluated for impairment | 25,898,000 |  | 25,898,000 |  | 17,134,000
Ending balance: collectively evaluated for impairment | 2,315,899,000 |  | 2,315,899,000 |  | 2,134,864,000
Commercial Portfolio Segment [Member] | Acquired Loan [Member] |  |  |  |  |
Beginning balance | 198,000 | 105,000 | 177,000 | 291,000 |
Provision for loan losses | (23,000) | 9,000 | (3,000) | 69,000 |
Charge-offs | 0 | 0 | 0 | (246,000) |
Recoveries | 0 | 0 | 1,000 | 0 |
Ending balance | 175,000 | 114,000 | 175,000 | 114,000 |
Loans and Leases Receivable, Net of Deferred Income, Total | 166,570,000 |  | 166,570,000 |  | 208,108,000
Retail Portfolio Segment [Member] |  |  |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 424,646,000 |  | 424,646,000 |  | 392,979,000
Retail Portfolio Segment [Member] | Originated Loan [Member] |  |  |  |  |
Beginning balance | 2,161,000 | 2,216,000 | 2,068,000 | 2,584,000 |
Provision for loan losses | 149,000 | (41,000) | 405,000 | (307,000) |
Charge-offs | (114,000) | (169,000) | (364,000) | (493,000) |
Recoveries | 84,000 | 227,000 | 171,000 | 449,000 |
Ending balance | 2,280,000 | 2,233,000 | 2,280,000 | 2,233,000 |
Ending balance: individually evaluated for impairment | 326,000 | 248,000 | 326,000 | 248,000 |
Ending balance: collectively evaluated for impairment | 1,954,000 | 1,985,000 | 1,954,000 | 1,985,000 |
Loans and Leases Receivable, Net of Deferred Income, Total | 348,380,000 |  | 348,380,000 |  | 300,448,000
Ending balance: individually evaluated for impairment | 1,764,000 |  | 1,764,000 |  | 1,748,000
Ending balance: collectively evaluated for impairment | 346,616,000 |  | 346,616,000 |  | 298,700,000
Retail Portfolio Segment [Member] | Acquired Loan [Member] |  |  |  |  |
Beginning balance | 524,000 | 580,000 | 649,000 | 77,000 |
Provision for loan losses | (17,000) | (82,000) | (154,000) | 426,000 |
Charge-offs | 0 | 0 | 0 | (15,000) |
Recoveries | 0 | 4,000 | 12,000 | 14,000 |
Ending balance | 507,000 | 502,000 | 507,000 | 502,000 |
Loans and Leases Receivable, Net of Deferred Income, Total | 76,266,000 |  | 76,266,000 |  | 92,531,000
Unallocated Financing Receivables [Member] | Originated Loan [Member] |  |  |  |  |
Beginning balance | 97,000 | (60,000) | 44,000 | 93,000 |
Provision for loan losses | 69,000 | 143,000 | 122,000 | (10,000) |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Ending balance | 166,000 | 83,000 | 166,000 | 83,000 |
Ending balance: individually evaluated for impairment | 0 | 0 | 0 | 0 |
Ending balance: collectively evaluated for impairment | 166,000 | 83,000 | 166,000 | 83,000 |
Loans and Leases Receivable, Net of Deferred Income, Total |  |  |  |  |
Ending balance: individually evaluated for impairment |  |  |  |  |
Ending balance: collectively evaluated for impairment |  |  |  |  |
Unallocated Financing Receivables [Member] | Acquired Loan [Member] |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 |
Provision for loan losses | 0 | 0 | 0 | 0 |
Charge-offs | 0 | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 | 0 |
Ending balance | $ 0 | $ 0 | $ 0 | $ 0 |

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