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Loans, net and allowance for loan losses - Changes in Allowance for Loan Losses Account by Major Classification of Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Allowance for loan losses: |  |  |
Beginning Balance | $ 27,344 | $ 22,677 | $ 22,677
Charge-offs | (195) | (798) |
Recoveries | 134 | 307 |
Provisions (credits) | (500) | 3,500 |
Ending balance | 26,783 | 25,686 | $ 27,344
Allowance for credit losses increase (decrease) | $ 600 |  |
Allowance for credit losses increase (decrease) percentage | 2.10% |  |
Increase (decrease) in allowance for credit loss on financing receivable from improved credit quality | $ 500 |  |
Percentage of allowance for loan losses | 1.23% |  | 1.26%
Percentage of PPP loans to total loans | 1.35% |  |
Allowance for Loan and Lease Losses Write-offs, Net | $ 100 | $ 500 |
Percentage of allowance for loan losses, charge offs net of recoveries to average loans | 0.01% | 0.10% |
Commercial |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | $ 8,734 | $ 6,888 | $ 6,888
Charge-offs | (15) | (650) |
Recoveries | 61 | 267 |
Provisions (credits) | (565) | 1,464 |
Ending balance | 8,215 | 7,969 | 8,734
Allowance for Loan and Lease Losses Write-offs, Net | 600 |  |
Real estate Commercial |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | 14,559 | 11,496 | 11,496
Charge-offs | (96) |  |
Recoveries | 58 |  |
Provisions (credits) | 182 | 1,511 |
Ending balance | 14,703 | 13,007 | 14,559
Real estate Residential |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | 3,129 | 3,226 | 3,226
Charge-offs | (22) | (54) |
Recoveries | 1 | 10 |
Provisions (credits) | (114) | 442 |
Ending balance | 2,994 | 3,624 | 3,129
Consumer |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | 922 | 1,067 | 1,067
Charge-offs | (62) | (94) |
Recoveries | 14 | 30 |
Provisions (credits) | (3) | 83 |
Ending balance | $ 871 | $ 1,086 | $ 922

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