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Loans (Details 4) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | $ 270 | $ 276 |  |
Collectively evaluated for impairment | 13,431 | 13,213 |  |
Acquired loans collectively evaluated for impairment | 76 | 103 |  |
Total ending allowance balance | 13,777 | 13,592 | $ 12,550 | $ 12,315
Loans: |  |  |  |
Loans individually evaluated for impairment | 5,524 | 5,723 |  |
Loans collectively evaluated for impairment | 1,500,155 | 1,480,769 |  |
Acquired loans | 237,123 | 248,445 |  |
Acquired with deteriorated credit quality | 1,040,644 | 1,021,912 |  |
Loans | 1,743,651 | 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 | 849 | 903 |  |
Commercial real estate |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | 6 | 6 |  |
Collectively evaluated for impairment | 5,151 | 4,981 |  |
Acquired loans collectively evaluated for impairment | 38 | 49 |  |
Total ending allowance balance | 5,195 | 5,036 | 4,404 | 4,260
Loans: |  |  |  |
Loans individually evaluated for impairment | 623 | 790 |  |
Loans collectively evaluated for impairment | 635,532 | 618,729 |  |
Acquired loans | 106,724 | 110,143 |  |
Loans | 743,124 | 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 | 245 | 262 |  |
Commercial |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | 3 | 3 |  |
Collectively evaluated for impairment | 2,144 | 2,075 |  |
Acquired loans collectively evaluated for impairment | 10 | 15 |  |
Total ending allowance balance | 2,157 | 2,093 | 2,062 | 2,011
Loans: |  |  |  |
Loans individually evaluated for impairment | 213 | 223 |  |
Loans collectively evaluated for impairment | 272,663 | 264,208 |  |
Acquired loans | 24,040 | 26,916 |  |
Loans | 297,520 | 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 | 604 | 641 |  |
Residential real estate |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |
Individually evaluated for impairment | 261 | 267 |  |
Collectively evaluated for impairment | 2,526 | 2,534 |  |
Acquired loans collectively evaluated for impairment | 26 | 36 |  |
Total ending allowance balance | 2,813 | 2,837 | 2,601 | 2,521
Loans: |  |  |  |
Loans individually evaluated for impairment | 4,538 | 4,627 |  |
Loans collectively evaluated for impairment | 385,831 | 385,702 |  |
Acquired loans | 97,738 | 101,804 |  |
Loans | 488,107 | 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 | 2,817 | 2,960 |  |
Acquired loans collectively evaluated for impairment | 2 | 3 |  |
Total ending allowance balance | 2,819 | 2,963 | 2,924 | 2,848
Loans: |  |  |  |
Loans individually evaluated for impairment | 150 | 83 |  |
Loans collectively evaluated for impairment | 206,129 | 212,130 |  |
Acquired loans | 8,621 | 9,582 |  |
Loans | 214,900 | 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 | 793 | 663 |  |
Acquired loans collectively evaluated for impairment | 0 | 0 |  |
Total ending allowance balance | 793 | 663 | $ 559 | $ 675
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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