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Accounting Policies (Details) - USD ($) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Jan. 01, 2020 | Dec. 31, 2019 | Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Provision for loan losses | $ 5,590 | $ 500 |  |  |
Allowance for loan losses | $ 24,498 | $ 21,095 |  | $ 21,398 | $ 21,039
Minimum | Accounting Standards Update 2016-13 |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Allowance for loan losses |  |  | $ 40,000 |  |
Maximum | Accounting Standards Update 2016-13 |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Allowance for loan losses |  |  | $ 44,000 |  |

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