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Loans and Allowance for Credit Losses - Summary of Purchased Credit Deteriorated (PCD) Loans (Details) - USD ($) |  |  | 3 Months Ended
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Feb. 14, 2022 | Feb. 22, 2021 | Mar. 31, 2022
Delta Bancshare Company |  |  |
Summary Of Purchased Credit Deteriorated Loans [Line Items] |  |  |
Purchase price of purchase credit deteriorated loans at acquisition |  |  | $ 18,796,000
Allowance for credit losses at acquisition | $ (863,000) |  | (863,000)
Non-credit discount/(premium) at acquisition |  |  | (523,000)
Fair value of purchased credit deteriorated loans at acquisition |  |  | 17,410,000
LINCO Bancshares, Inc. |  |  |
Summary Of Purchased Credit Deteriorated Loans [Line Items] |  |  |
Purchase price of purchase credit deteriorated loans at acquisition |  |  | 64,647,000
Allowance for credit losses at acquisition |  | $ (2,000,000) | (2,074,000)
Non-credit discount/(premium) at acquisition |  |  | (187,000)
Fair value of purchased credit deteriorated loans at acquisition |  |  | $ 62,386,000

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 19 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919265-210447 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 19 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919265-210447 + Details
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- Definition Amount at purchase price of financing receivable purchased with credit deterioration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 19 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919265-210447 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 19 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919265-210447 + Details
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