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Loans and Allowance for Credit Losses - Loans Restructured as TDRs, Excluding Loans Acquired, Segregated by Class of Loans (Details) | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of TDR loans | loan | 4 | 5
Balance Prior to TDR | $ 1,058,000 | $ 1,948,000
Financial Impact on Date of Restructure |  | $ 51,300
Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of TDR loans | loan | 4 | 5
Balance Prior to TDR | $ 1,058,000 | $ 1,948,000
Balance | 963,000 | 1,896,000
Financial Impact on Date of Restructure | 0 | 0
Real Estate | Change in Maturity Date |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Balance | 0 | 1,896,000
Real Estate | Change in Rate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Balance | $ 963,000 | $ 0
Real Estate | Single family residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of TDR loans | loan | 3 | 5
Balance Prior to TDR | $ 274,000 | $ 1,948,000
Balance | 197,000 | 1,896,000
Financial Impact on Date of Restructure | 0 | 0
Real Estate | Single family residential | Change in Maturity Date |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Balance | 0 | 1,896,000
Real Estate | Single family residential | Change in Rate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Balance | $ 197,000 | $ 0
Real Estate | Other commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of TDR loans | loan | 1 |
Balance Prior to TDR | $ 784,000 |
Balance | 766,000 |
Financial Impact on Date of Restructure | 0 |
Real Estate | Other commercial | Change in Maturity Date |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Balance | 0 |
Real Estate | Other commercial | Change in Rate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Balance | $ 766,000 |

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
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