Loans and Allowance for Credit Losses on Loans - Loans Balance (Details) - USD ($)	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Loans held-for-investment:
Total loan balance	$ 3,410,563,000		$ 3,350,873,000
Deferred loan fees, net	(327,000)		(495,000)
Loans, net of deferred fees	3,410,236,000		3,350,378,000	$ 3,285,461,000
Allowance for credit losses on loans	(47,819,000)	$ (47,954,000)	(47,958,000)	(47,702,000)	$ (47,803,000)	$ (47,512,000)
Loans, net	3,362,417,000		3,302,420,000
Commercial. | Commercial
Loans held-for-investment:
Total loan balance	481,266,000		463,778,000
Allowance for credit losses on loans	(4,717,000)	(5,010,000)	(5,853,000)	(5,605,000)	(6,550,000)	(6,617,000)
Real estate | CRE - Owner Occupied
Loans held-for-investment:
Total loan balance	602,062,000		583,253,000
Allowance for credit losses on loans	(5,420,000)	(5,344,000)	(5,121,000)	(5,345,000)	(5,463,000)	(5,751,000)
Real estate | CRE - Non-Owner Occupied
Loans held-for-investment:
Total loan balance	1,310,578,000		1,256,590,000
Allowance for credit losses on loans	(27,450,000)	(26,847,000)	(25,323,000)	(24,919,000)	(23,523,000)	(22,135,000)
Real estate | Land & Construction
Loans held-for-investment:
Total loan balance	125,761,000		140,513,000
Allowance for credit losses on loans	(1,328,000)	(1,523,000)	(2,352,000)	(2,744,000)	(2,870,000)	(2,941,000)
Real estate | Home Equity
Loans held-for-investment:
Total loan balance	124,090,000		119,125,000
Allowance for credit losses on loans	(760,000)	(814,000)	(644,000)	(707,000)	(730,000)	(666,000)
Real estate | Multi-Family
Loans held-for-investment:
Total loan balance	273,103,000		269,734,000
Allowance for credit losses on loans	(4,355,000)	(4,269,000)	(5,053,000)	(4,714,000)	(4,383,000)	(3,366,000)
Real estate | Residential Mortgage
Loans held-for-investment:
Total loan balance	479,524,000		496,961,000
Allowance for credit losses on loans	(3,669,000)	(3,960,000)	(3,425,000)	(3,494,000)	(4,129,000)	(5,907,000)
Real estate | Consumer and Other
Loans held-for-investment:
Total loan balance			20,919,000
Consumer | Consumer and Other
Loans held-for-investment:
Total loan balance	14,179,000		20,919,000
Allowance for credit losses on loans	$ (120,000)	$ (187,000)	$ (187,000)	$ (174,000)	$ (155,000)	$ (129,000)