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Loans and Allowance for Credit Losses - Schedule of Loans by Class (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020
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Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Loans, at amortized cost | $ 2,092,546 | $ 2,255,645 |  |
Allowance for credit losses on loans | (22,983) | (23,023) | $ (22,874) | $ (22,113)
Total loans, net of allowance for credit losses on loans | 2,069,563 | 2,232,622 |  |
Net deferred loan origination costs (fees) | 1,800 | (901) |  |
Unrecognized purchase discounts on non-PCI loans | $ 2,600 | $ 2,500 |  |
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Interest receivable and other assets | Interest receivable and other assets |  |
Financing receivable, accrued interest, net | $ 6,100 | $ 7,100 |  |
Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Loans, at amortized cost | 173,547 | 301,602 |  |
Allowance for credit losses on loans | (1,794) | (1,709) | (2,530) | (2,525)
Commercial real estate | Commercial owner-occupied |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Loans, at amortized cost | 354,877 | 392,345 |  |
Allowance for credit losses on loans | (2,487) | (2,776) | (2,778) | (3,135)
Commercial real estate | Commercial investor-owned |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Loans, at amortized cost | 1,191,889 | 1,189,021 |  |
Allowance for credit losses on loans | (12,676) | (12,739) | (12,682) | (11,624)
Commercial real estate | Construction |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Loans, at amortized cost | 114,373 | 119,840 |  |
Allowance for credit losses on loans | (1,937) | (1,653) | (1,557) | (860)
Residential loans | Home equity |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Loans, at amortized cost | 88,748 | 88,746 |  |
Allowance for credit losses on loans | (558) | (595) | (738) | (1,038)
Residential loans | Other residential |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Loans, at amortized cost | 112,123 | 114,558 |  |
Allowance for credit losses on loans | (595) | (644) | (998) | (1,260)
Consumer loans | Installment and other consumer loans |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Loans, at amortized cost | 56,989 | 49,533 |  |
Allowance for credit losses on loans | $ (868) | $ (621) | $ (291) | $ (406)

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