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Loans (Details 4) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | $ 61 | $ 276 |  |
Collectively evaluated for impairment | 14,320 | 13,213 |  |
Acquired loans collectively evaluated for impairment | 106 | 103 |  |
Total ending allowance balance | 14,487 | 13,592 | $ 12,315 | $ 10,852
Loans: |  |  |  |
Loans individually evaluated for impairment | 4,253 | 5,723 |  |
Loans collectively evaluated for impairment | 1,614,267 | 1,480,769 |  |
Acquired loans | 192,329 | 248,445 |  |
Acquired with deteriorated credit quality | 1,097,240 | 1,021,912 |  |
Loans | 1,811,539 | 1,735,840 |  |
Receivables Acquired with Deteriorated Credit Quality |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Acquired with deteriorated credit quality | 0 | 0 |  |
Loans: |  |  |  |
Acquired with deteriorated credit quality | 690 | 903 |  |
Commercial real estate |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | 0 | 6 |  |
Collectively evaluated for impairment | 5,790 | 4,981 |  |
Acquired loans collectively evaluated for impairment | 53 | 49 |  |
Total ending allowance balance | 5,843 | 5,036 | 4,260 | 3,577
Loans: |  |  |  |
Loans individually evaluated for impairment | 561 | 790 |  |
Loans collectively evaluated for impairment | 702,226 | 618,729 |  |
Acquired loans | 86,431 | 110,143 |  |
Loans | 789,413 | 729,924 |  |
Commercial real estate | Receivables Acquired with Deteriorated Credit Quality |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Acquired with deteriorated credit quality | 0 | 0 |  |
Loans: |  |  |  |
Acquired with deteriorated credit quality | 195 | 262 |  |
Commercial |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | 2 | 3 |  |
Collectively evaluated for impairment | 2,309 | 2,075 |  |
Acquired loans collectively evaluated for impairment | 12 | 15 |  |
Total ending allowance balance | 2,323 | 2,093 | 2,011 | 1,874
Loans: |  |  |  |
Loans individually evaluated for impairment | 205 | 223 |  |
Loans collectively evaluated for impairment | 290,017 | 264,208 |  |
Acquired loans | 17,110 | 26,916 |  |
Loans | 307,827 | 291,988 |  |
Commercial | Receivables Acquired with Deteriorated Credit Quality |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Acquired with deteriorated credit quality | 0 | 0 |  |
Loans: |  |  |  |
Acquired with deteriorated credit quality | 495 | 641 |  |
Residential real estate |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | 59 | 267 |  |
Collectively evaluated for impairment | 2,777 | 2,534 |  |
Acquired loans collectively evaluated for impairment | 39 | 36 |  |
Total ending allowance balance | 2,875 | 2,837 | 2,521 | 2,205
Loans: |  |  |  |
Loans individually evaluated for impairment | 3,240 | 4,627 |  |
Loans collectively evaluated for impairment | 413,446 | 385,702 |  |
Acquired loans | 82,615 | 101,804 |  |
Loans | 499,301 | 492,133 |  |
Residential real estate | Receivables Acquired with Deteriorated Credit Quality |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Acquired with deteriorated credit quality | 0 | 0 |  |
Loans: |  |  |  |
Acquired with deteriorated credit quality | 0 | 0 |  |
Consumer |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | 0 | 0 |  |
Collectively evaluated for impairment | 2,708 | 2,960 |  |
Acquired loans collectively evaluated for impairment | 2 | 3 |  |
Total ending allowance balance | 2,710 | 2,963 | 2,848 | 2,766
Loans: |  |  |  |
Loans individually evaluated for impairment | 247 | 83 |  |
Loans collectively evaluated for impairment | 208,578 | 212,130 |  |
Acquired loans | 6,173 | 9,582 |  |
Loans | 214,998 | 221,795 |  |
Consumer | Receivables Acquired with Deteriorated Credit Quality |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Acquired with deteriorated credit quality | 0 | 0 |  |
Loans: |  |  |  |
Acquired with deteriorated credit quality | 0 | 0 |  |
Unallocated |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | 0 | 0 |  |
Collectively evaluated for impairment | 736 | 663 |  |
Acquired loans collectively evaluated for impairment | 0 | 0 |  |
Total ending allowance balance | 736 | 663 | $ 675 | $ 430
Loans: |  |  |  |
Loans individually evaluated for impairment | 0 | 0 |  |
Loans collectively evaluated for impairment | 0 | 0 |  |
Acquired loans | 0 | 0 |  |
Loans | 0 | 0 |  |
Unallocated | Receivables Acquired with Deteriorated Credit Quality |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Acquired with deteriorated credit quality | 0 | 0 |  |
Loans: |  |  |  |
Acquired with deteriorated credit quality | $ 0 | $ 0 |  |

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