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Loans (Details 4) - USD ($) $ in Thousands | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | --- | --- | ---
Ending allowance balance attributable to loans: |  |  |  |  |  |
Individually evaluated for impairment | $ 271 |  | $ 276 |  |  |
Collectively evaluated for impairment | 13,829 |  | 13,213 |  |  |
Acquired loans collectively evaluated for impairment | 122 |  | 103 |  |  |
Total ending allowance balance | 14,222 | $ 13,777 | 13,592 | $ 12,764 | $ 12,550 | $ 12,315
Loans: |  |  |  |  |  |
Loans individually evaluated for impairment | 5,256 |  | 5,723 |  |  |
Loans collectively evaluated for impairment | 1,552,887 |  | 1,480,769 |  |  |
Acquired loans | 221,564 |  | 248,445 |  |  |
Acquired with deteriorated credit quality | 1,074,864 |  | 1,021,912 |  |  |
Loans | 1,780,504 |  | 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 | 797 |  | 903 |  |  |
Commercial real estate |  |  |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |  |  |
Individually evaluated for impairment | 6 |  | 6 |  |  |
Collectively evaluated for impairment | 5,506 |  | 4,981 |  |  |
Acquired loans collectively evaluated for impairment | 59 |  | 49 |  |  |
Total ending allowance balance | 5,571 | 5,195 | 5,036 | 4,339 | 4,404 | 4,260
Loans: |  |  |  |  |  |
Loans individually evaluated for impairment | 692 |  | 790 |  |  |
Loans collectively evaluated for impairment | 674,524 |  | 618,729 |  |  |
Acquired loans | 99,027 |  | 110,143 |  |  |
Loans | 774,472 |  | 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 | 229 |  | 262 |  |  |
Commercial |  |  |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |  |  |
Individually evaluated for impairment | 3 |  | 3 |  |  |
Collectively evaluated for impairment | 2,182 |  | 2,075 |  |  |
Acquired loans collectively evaluated for impairment | 14 |  | 15 |  |  |
Total ending allowance balance | 2,199 | 2,157 | 2,093 | 1,937 | 2,062 | 2,011
Loans: |  |  |  |  |  |
Loans individually evaluated for impairment | 210 |  | 223 |  |  |
Loans collectively evaluated for impairment | 277,940 |  | 264,208 |  |  |
Acquired loans | 21,674 |  | 26,916 |  |  |
Loans | 300,392 |  | 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 | 568 |  | 641 |  |  |
Residential real estate |  |  |  |  |  |
Ending allowance balance attributable to loans: |  |  |  |  |  |
Individually evaluated for impairment | 262 |  | 267 |  |  |
Collectively evaluated for impairment | 2,602 |  | 2,534 |  |  |
Acquired loans collectively evaluated for impairment | 46 |  | 36 |  |  |
Total ending allowance balance | 2,910 | 2,813 | 2,837 | 2,651 | 2,601 | 2,521
Loans: |  |  |  |  |  |
Loans individually evaluated for impairment | 4,209 |  | 4,627 |  |  |
Loans collectively evaluated for impairment | 395,343 |  | 385,702 |  |  |
Acquired loans | 93,229 |  | 101,804 |  |  |
Loans | 492,781 |  | 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 | 2,752 |  | 2,960 |  |  |
Acquired loans collectively evaluated for impairment | 3 |  | 3 |  |  |
Total ending allowance balance | 2,755 | 2,819 | 2,963 | 3,050 | 2,924 | 2,848
Loans: |  |  |  |  |  |
Loans individually evaluated for impairment | 145 |  | 83 |  |  |
Loans collectively evaluated for impairment | 205,080 |  | 212,130 |  |  |
Acquired loans | 7,634 |  | 9,582 |  |  |
Loans | 212,859 |  | 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 | 787 |  | 663 |  |  |
Acquired loans collectively evaluated for impairment | 0 |  | 0 |  |  |
Total ending allowance balance | 787 | $ 793 | 663 | $ 787 | $ 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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