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Loans and Allowance for Credit Losses on Loans - Troubled Debt Restructuring Narrative (Details) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2022 USD ($) loan borrowingRelationship | Sep. 30, 2021 USD ($) | Dec. 31, 2021 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Loans at amortized cost | $ 2,158,336 |  | $ 2,255,645
Financing receivable, loan modifications under CARES Act, payment relief, number of borrowing relationships | borrowingRelationship | 1 |  |
Financing receivable, loan modifications under CARES Act, payment relief | loan | 2 |  |
Financing receivable, modified under CARES Act, payment relief | $ 7,100 |  |
Commercial loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Financing receivable modifications removal from troubled debt restructuring recorded investment | $ 2 |  |
Residential loans |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Financing receivable modifications removal from troubled debt restructuring recorded investment |  | $ 600 |

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- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + Details
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