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Allowance for Credit Losses - Activity in allowance for credit losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 39,767 | $ 39,779 | $ 39,779
Provision for credit losses | 1,800 | 1,800 |
Loans charged -off | (3,192) | (4,376) |
Recoveries | 1,670 | 2,417 |
Ending Balance | 40,045 | 39,620 | 39,767
Commercial |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 13,264 | 12,949 | 12,949
Provision for credit losses | 271 | (54) |
Loans charged -off | (231) | (306) |
Recoveries | 275 | 201 |
Ending Balance | 13,579 | 12,790 | 13,264
Residential |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 14,327 | 14,568 | 14,568
Provision for credit losses | (173) | 500 |
Loans charged -off | (14) | (79) |
Recoveries | 93 | 70 |
Ending Balance | 14,233 | 15,059 | 14,327
Consumer |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 11,797 | 12,104 | 12,104
Provision for credit losses | 1,767 | 1,254 |
Loans charged -off | (2,947) | (3,991) |
Recoveries | 1,302 | 2,146 |
Ending Balance | 11,919 | 11,513 | 11,797
Unallocated |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 379 | 158 | 158
Provision for credit losses | (65) | 100 |
Ending Balance | $ 314 | $ 258 | $ 379

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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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- Definition Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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- Definition Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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