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Loans and Allowance for Credit Losses - Loans - ACL for Loans and Amortized Cost Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | ---
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses: ending balance, collectively evaluated for impairment | $ 32,914 |  |  | $ 17,570 |  |
Allowance for loan losses: ending balance, individually evaluated for impairment | 1,090 |  |  | 910 |  |
Allowance for loan losses | 34,004 | $ 32,588 | $ 18,957 | 18,480 | $ 16,876 | $ 14,597
Loans receivable: ending balance, collectively evaluated for impairment | 4,132,196 |  |  | 3,322,457 |  |
Loans receivable: ending balance, individually evaluated for impairment | 13,461 |  |  | 3,697 |  |
Loans, net of unearned interest | 4,145,657 |  | 3,514,119 | 3,314,942 |  |
Commercial portfolio | Commercial real estate |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses: ending balance, collectively evaluated for impairment | 18,300 |  |  | 12,494 |  |
Allowance for loan losses: ending balance, individually evaluated for impairment | 380 |  |  | 28 |  |
Allowance for loan losses | 18,680 | 14,197 | 13,142 | 12,522 | 11,991 | 9,415
Loans receivable: ending balance, collectively evaluated for impairment | 2,281,707 |  |  | 1,944,802 |  |
Loans receivable: ending balance, individually evaluated for impairment | 6,689 |  |  | 713 |  |
Loans, net of unearned interest | 2,288,396 |  | 2,052,934 | 1,942,725 |  |
Commercial portfolio | Commercial and industrial |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses: ending balance, collectively evaluated for impairment | 6,623 |  |  | 3,718 |  |
Allowance for loan losses: ending balance, individually evaluated for impairment | 708 |  |  | 831 |  |
Allowance for loan losses | 7,331 | 11,403 | 4,593 | 4,549 | 3,671 | 3,439
Loans receivable: ending balance, collectively evaluated for impairment | 646,883 |  |  | 556,796 |  |
Loans receivable: ending balance, individually evaluated for impairment | 1,556 |  |  | 1,309 |  |
Loans, net of unearned interest | 648,439 |  | 596,042 | 555,487 |  |
Commercial portfolio | Construction |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses: ending balance, collectively evaluated for impairment | 5,878 |  |  | 51 |  |
Allowance for loan losses: ending balance, individually evaluated for impairment | 0 |  |  | 0 |  |
Allowance for loan losses | 5,878 | 3,667 | 0 | 51 | 46 | 38
Loans receivable: ending balance, collectively evaluated for impairment | 459,959 |  |  | 400,188 |  |
Loans receivable: ending balance, individually evaluated for impairment | 2,256 |  |  | 0 |  |
Loans, net of unearned interest | 462,215 |  | 441,246 | 398,966 |  |
Consumer portfolio | Residential mortgage |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses: ending balance, collectively evaluated for impairment | 2,090 |  |  | 1,251 |  |
Allowance for loan losses: ending balance, individually evaluated for impairment | 2 |  |  | 51 |  |
Allowance for loan losses | 2,092 | 3,145 | 1,319 | 1,302 | 1,143 | 1,019
Loans receivable: ending balance, collectively evaluated for impairment | 740,573 |  |  | 412,518 |  |
Loans receivable: ending balance, individually evaluated for impairment | 2,960 |  |  | 1,675 |  |
Loans, net of unearned interest | 743,533 |  | 416,221 | 409,611 |  |
Consumer portfolio | Consumer |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for loan losses: ending balance, collectively evaluated for impairment | 23 |  |  | 2 |  |
Allowance for loan losses: ending balance, individually evaluated for impairment | 0 |  |  | 0 |  |
Allowance for loan losses | 23 | $ 176 | 29 | 2 | $ 2 | $ 2
Loans receivable: ending balance, collectively evaluated for impairment | 3,074 |  |  | 8,153 |  |
Loans receivable: ending balance, individually evaluated for impairment | 0 |  |  | 0 |  |
Loans, net of unearned interest | $ 3,074 |  | $ 7,676 | $ 8,153 |  |

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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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