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Loans and Allowance for Credit Losses - Loans by Class of Loan Portfolio (Details) $ in Thousands	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 4,882,969		$ 4,771,988
% of Total Loans	1.0000		1.0000
Less: allowance for credit losses	$ (59,554)	$ (58,483)	$ (57,910)	$ (58,669)	$ (58,478)	$ (57,351)
Loans, net	4,823,415		4,714,078
Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 2,642,601		$ 2,557,806
% of Total Loans	0.5412		0.5360
Less: allowance for credit losses	$ (21,069)	(21,662)	$ (22,846)	(23,099)	(22,984)	(23,015)
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 1,383,348		$ 1,329,406
% of Total Loans	0.2833		0.2785
Less: allowance for credit losses	$ (22,810)	(21,720)	$ (21,776)	(21,707)	(20,500)	(19,909)
Construction
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 352,116		$ 335,999
% of Total Loans	0.0721		0.0704
Less: allowance for credit losses	$ (6,221)	(5,805)	$ (2,854)	(2,894)	(3,471)	(3,935)
Commercial
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 221,598		$ 237,932
% of Total Loans	0.0454		0.0499
Less: allowance for credit losses	$ (3,642)	(2,870)	$ (3,138)	(3,225)	(2,866)	(2,671)
Consumer
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 278,242		$ 303,746
% of Total Loans	0.0570		0.0637
Less: allowance for credit losses	$ (5,702)	(6,188)	$ (6,889)	(7,254)	(8,145)	(7,601)
Credit cards
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 5,064		$ 7,099
% of Total Loans	0.0010		0.0015
Less: allowance for credit losses	$ (110)	$ (238)	$ (407)	$ (490)	$ (512)	$ (220)

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