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Loans and Allowance for Credit Losses - Additional Information (Details) - USD ($) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 01, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Loans and Allowance for Credit Losses |  |  |  |  |
Loans receivable, allowance for credit losses |  | $ 63,480,000 | $ 60,754,000 |  |
Troubled debt restructurings internal grading system substandard |  | 1,700,000 | 2,900,000 |  |
TDR loans, Balance |  | 2,949,000 | 3,851,000 |  |
Non-accrual loans for no related allowance amortized cost |  | 2,100,000 |  |  |
TDR loans evaluated on individual | $ 100,000 | 100,000 |  |  |
After-tax effect decreased retained earnings | 14,200,000 |  |  |  |
Allowance for credit losses | 67,300,000 |  |  |  |
FDIC-acquired loans and remaining Accretable yield |  |  | 429,000 |  |
Minimum loan balance with addition to TDR status for classification of loans into Collateral-dependent loans |  | 100,000 |  |  |
Interest income |  | 0 | 0 |  |
Financing Receivables, Troubled Debt Restructuring |  | 2,900,000 | 3,900,000 |  |
Allowance for credit losses |  | (63,480,000) | (60,754,000) | $ (67,338,000) |
CECL adoption |  |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |  |
Allowance for credit losses |  |  |  | (11,595,000) |
Allowance for unfunded commitment |  |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |  |
Allowance for credit losses | 8,700,000 |  |  |  |
Allowance for credit losses |  | (12,816,000) | (9,629,000) | $ (8,690,000) |
Allowance for unfunded commitment | CECL adoption |  |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |  |
Allowance for credit losses |  |  |  |  | $ (8,690,000)
Commercial real estate |  |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |  |
TDR loans, Balance |  | $ 1,571,000 | $ 1,811,000 |  |
PCI |  |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |  |
Allowance for credit losses | 1,900,000 |  |  |  |
Adopted ASC 326 |  |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |  |
Allowance for credit losses | 11,600,000 |  |  |  |
CECL Methodology |  |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |  |
Allowance for credit losses | 11,600,000 |  |  |  |
Allowance for credit loss remaining discount on loan | 1,900,000 |  |  |  |
CECL Methodology | Allowance for unfunded commitment |  |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |  |
Allowance for credit losses | $ 8,700,000 |  |  |  |

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