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Loans and Allowance for Credit Losses - TDR Narrative (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 USD ($) loan | Mar. 31, 2021 USD ($) | Mar. 31, 2021 USD ($) contract | Mar. 31, 2020 USD ($) loan | Mar. 31, 2020 USD ($) | Mar. 31, 2020 USD ($) contract | Dec. 31, 2020 USD ($)
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |
Number of TDR loans | contract |  |  | 8 |  |  | 13 |
Troubled debt restructuring, amount |  | $ 16,771 |  |  | $ 20,379 |  |
Number of loans - restructured accruing | 1 |  | 5 | 1 |  | 11 |
Number of loans paydowns | loan | 0 |  |  | 0 |  |  |
Restructured accruing |  | 10,328 |  |  | 17,872 |  |
Number of contracts modified in TDR | loan | 0 |  |  | 4 |  |  |
TDR premodification |  |  |  |  | 1,300 |  |
Non-Performing Loans |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |
Number of loans subsequent defaults reclassified to non-performing | loan | 1,000 |  |  | 0 |  |  |
Troubled debt restructuring | $ 101 | 101 | $ 101 | $ 0 | $ 0 | $ 0 |
Performing Financial Instruments |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |  |  |  |
Number of TDR loans | contract |  |  | 5 |  |  |  |
Troubled debt restructuring, amount |  | 10,300 |  |  |  |  |
Troubled debt restructuring | $ 10,300 | $ 10,300 | $ 10,300 |  |  |  | $ 10,500

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