LOANS HELD FOR INVESTMENT, Summary of Loans Held for Investment by Category (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) Category	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	$ 2,993,563		$ 2,748,081
Allowance for credit losses on loans	(42,075)	$ (43,137)	(39,288)	$ (39,657)	$ (39,785)	$ (42,098)
Loans held for investment, net	2,951,488		2,708,793
Commercial Real Estate [Member]
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	1,046,262		919,358
Allowance for credit losses on loans	$ (14,945)	(14,501)	(13,029)	(12,611)	(13,903)	(17,245)
Commercial [Member]
Summary of Loans Held for Investment by Category [Abstract]
Number of sub-categories of loans | Category	2
Commercial [Member] | Specialized [Member]
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	$ 366,405		327,513
Allowance for credit losses on loans	(3,943)	(4,154)	(3,425)	(3,705)	(3,355)	(4,363)
Commercial [Member] | General [Member]
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	514,567		484,783
Allowance for credit losses on loans	(6,370)	(7,637)	(9,215)	(10,425)	(9,918)	(8,466)
Consumer [Member] | 1-4 Family Residential [Member]
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	534,511		460,124
Allowance for credit losses on loans	(8,990)	(8,851)	(6,194)	(5,561)	(5,329)	(5,268)
Consumer [Member] | Auto Loans [Member]
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	316,024		321,476
Allowance for credit losses on loans	(3,786)	(3,900)	(3,926)	(3,892)	(3,958)	(3,653)
Consumer [Member] | Other Consumer [Member]
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	77,325		81,308
Allowance for credit losses on loans	(1,022)	(1,107)	(1,376)	(1,455)	(1,443)	(1,357)
Construction [Member]
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	138,469		153,519
Allowance for credit losses on loans	$ (3,019)	$ (2,987)	$ (2,123)	$ (2,008)	$ (1,879)	$ (1,746)