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Loans and Allowance for Credit Losses - Troubled Debt Restructuring and CARES Act Narrative (Details) | 12 Months Ended | 22 Months Ended
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Dec. 31, 2021 USD ($) loan borrowingRelationship | Dec. 31, 2020 USD ($) borrowingRelationship loan | Dec. 31, 2019 USD ($) loan | Dec. 31, 2021 USD ($) loan borrowingRelationship
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of loans removed from TDR designation | loan |  | 0 | 1 |
Loan modifications under CARES Act during period | loan |  |  |  | 269
Loans modified under CARES Act during period, value |  |  |  | $ 402,900,000
Loan modifications under CARES Act, additional relief, number of borrowing relationships | borrowingRelationship | 2 | 21 |  | 2
Loan modifications under CARES Act, additional relief | loan | 3 | 29 |  | 3
Loan modifications under CARES Act, additional relief, value | $ 23,600,000 | $ 71,000,000 |  | $ 23,600,000
Weighted average loan-to-value ratio | 44.00% |  |  |
Total of TDR loans charged-off within previous 12 months, value | $ 0 | $ 0 | $ 0 |
Commercial |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of loans removed from TDR designation | loan | 1 |  |  |
Recorded investment of loans removed from TDR resignation | $ 2,000 |  | $ 3,000 |
Residential loans |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Recorded investment of loans removed from TDR resignation | $ 600,000 |  |  |

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- Definition Financing Receivable, Modifications, Removal From Troubled Debt Restructuring, Recorded Investment + References No definition available. + Details
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- Definition Loans And Leases Receivable, Net Of Deferred Income, Modified Under CARES Act, Additional Relief + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524 + Details
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