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Loans and Allowance for Credit Losses - Loan Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Components of loans
Total loans, excluding purchased credit impaired loans	$ 2,268,652	$ 2,368,180
Collectively evaluated for impairment			$ 2,443,897
Total loans	2,268,652	2,370,662
Deferred loan origination costs, net	1,781	1,983
Loans receivable	2,270,433	2,372,645
Purchased credit impaired loans
Components of loans
Total loans	0	2,482
Total commercial
Components of loans
Total loans, excluding purchased credit impaired loans	1,573,128	1,610,910
Collectively evaluated for impairment			1,688,421
Total commercial | Business
Components of loans
Total loans, excluding purchased credit impaired loans	811,203	851,072
Collectively evaluated for impairment			856,919
Total commercial | Real estate
Components of loans
Total loans, excluding purchased credit impaired loans	640,167	632,839
Collectively evaluated for impairment			700,395
Total commercial | Acquisition, development and construction
Components of loans
Total loans, excluding purchased credit impaired loans	121,758	126,999
Collectively evaluated for impairment			131,107
Residential real estate
Components of loans
Total loans, excluding purchased credit impaired loans	650,321	606,970
Collectively evaluated for impairment			596,214
Residential real estate | Purchased credit impaired loans
Components of loans
Collectively evaluated for impairment	0	2,482
Home equity lines of credit
Components of loans
Total loans, excluding purchased credit impaired loans	14,862	18,734
Consumer
Components of loans
Total loans, excluding purchased credit impaired loans	$ 30,341	$ 131,566
Collectively evaluated for impairment			$ 140,043

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Amortized cost, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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Amount of unamortized loan commitment, origination, and other costs (fees) and purchase premium (discount) on financing receivable recognized as adjustment to yield. Excludes financing receivable covered under loss sharing agreement.

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