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Allowance for Credit Losses - Summary of Company's Allowance for Loan Losses ("All") and Recorded Investment in Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance | $ 96,457 | $ 92,581 | $ 97,947 | $ 89,553 | $ 89,553
Charge-offs | (3,505) | (540) | (8,387) | (1,218) | (1,575)
Recoveries | 95 | 280 | 781 | 386 |
Provision expense (release) for credit losses | 2,000 | 1,125 | 4,706 | 4,725 |
Ending balance | 95,047 | 93,446 | 95,047 | 93,446 | 97,947
Commercial |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 45,304 | 37,608 | 37,608
Charge-offs |  |  | (2,954) | (242) | (277)
Recoveries |  |  | 352 | 286 |
Provision expense (release) for credit losses |  |  | 3,548 | 7,639 |
Ending balance | 46,250 | 45,291 | 46,250 | 45,291 | 45,304
Non-owner occupied commercial real estate |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 32,665 | 32,050 | 32,050
Charge-offs |  |  | (4,715) |  |
Recoveries |  |  | 7 | 3 |
Provision expense (release) for credit losses |  |  | 99 | (3,585) |
Ending balance | 28,056 | 28,468 | 28,056 | 28,468 | 32,665
Residential real estate |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 19,550 | 19,306 | 19,306
Charge-offs |  |  |  | (46) | (48)
Recoveries |  |  | 95 | 19 |
Provision expense (release) for credit losses |  |  | 755 | 12 |
Ending balance | 20,400 | 19,291 | 20,400 | 19,291 | 19,550
Consumer |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 428 | 589 | 589
Charge-offs |  |  | (718) | (930) | (1,250)
Recoveries |  |  | 327 | 78 |
Provision expense (release) for credit losses |  |  | 304 | 659 |
Ending balance | 341 | 396 | 341 | 396 | $ 428
Commercial |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance | 48,910 | 42,058 |  |  |
Charge-offs | (2,930) | (239) |  |  |
Recoveries | 60 | 241 |  |  |
Provision expense (release) for credit losses | 210 | 3,231 |  |  |
Ending balance | 46,250 | 45,291 | 46,250 | 45,291 |
Residential real estate |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance | 19,759 | 19,331 |  |  |
Recoveries | 5 | 7 |  |  |
Provision expense (release) for credit losses | 636 | (47) |  |  |
Ending balance | 20,400 | 19,291 | 20,400 | 19,291 |
Consumer |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance | 376 | 424 |  |  |
Charge-offs | (282) | (301) |  |  |
Recoveries | 30 | 31 |  |  |
Provision expense (release) for credit losses | 217 | 242 |  |  |
Ending balance | 341 | 396 | 341 | 396 |
Non-owner occupied commercial real estate |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Beginning balance | 27,412 | 30,768 |  |  |
Charge-offs | (293) |  |  |  |
Recoveries |  | 1 |  |  |
Provision expense (release) for credit losses | 937 | (2,301) |  |  |
Ending balance | $ 28,056 | $ 28,468 | $ 28,056 | $ 28,468 |

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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 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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