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Loans and Allowance for Credit Losses - Summary of Purchased Credit Deteriorated (PCD) Loans (Details) - USD ($) $ in Thousands |  | 9 Months Ended
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Feb. 14, 2022 | Sep. 30, 2023
Delta Acquisition [Member] |  |
Summary Of Purchased Credit Deteriorated Loans [Line Items] |  |
Fair value of PCD loans | $ 18,796 |
PCD allowance for credit losses at acquisition | (863) |
Non-credit discount/(premium) at acquisition | (523) |
Fair value of purchased credit deteriorated loans at acquisition | $ 17,410 |
Blackhawk Acquisition [Member[ |  |
Summary Of Purchased Credit Deteriorated Loans [Line Items] |  |
Fair value of PCD loans |  | $ 115,250
PCD allowance for credit losses at acquisition |  | (3,791)
Non-credit discount/(premium) at acquisition |  | (5,476)
Fair value of purchased credit deteriorated loans at acquisition |  | $ 105,983

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- Definition Amount of allowance for credit loss at acquisition date of financing receivable purchased with credit deterioration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 19 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-19 + Details
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- Definition Amount at par value of financing receivable purchased with credit deterioration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 19 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-19 + Details
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- Definition Amount of discount (premium) attributable to other factors on financing receivable purchased with credit deterioration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 19 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-19 + Details
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