LOANS HELD FOR INVESTMENT, Summary of Loans Held for Investment by Category (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) Category	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	$ 2,979,063		$ 2,748,081
Allowance for credit losses on loans	(43,137)	$ (39,560)	(39,288)	$ (39,785)	$ (39,649)	$ (42,098)
Loans held for investment, net	2,935,926		2,708,793
Commercial Real Estate [Member]
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	1,006,909		919,358
Allowance for credit losses on loans	$ (14,501)	(13,381)	(13,029)	(13,903)	(14,621)	(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	$ 355,252		327,513
Allowance for credit losses on loans	(4,154)	(3,510)	(3,425)	(3,355)	(3,275)	(4,363)
Commercial [Member] | General [Member]
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	551,096		484,783
Allowance for credit losses on loans	(7,637)	(6,267)	(9,215)	(9,918)	(9,940)	(8,466)
Consumer [Member] | 1-4 Family Residential [Member]
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	522,472		460,124
Allowance for credit losses on loans	(8,851)	(8,531)	(6,194)	(5,329)	(4,931)	(5,268)
Consumer [Member] | Auto Loans [Member]
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	318,126		321,476
Allowance for credit losses on loans	(3,900)	(3,714)	(3,926)	(3,958)	(3,681)	(3,653)
Consumer [Member] | Other Consumer [Member]
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	79,795		81,308
Allowance for credit losses on loans	(1,107)	(1,101)	(1,376)	(1,443)	(1,384)	(1,357)
Construction [Member]
Summary of Loans Held for Investment by Category [Abstract]
Loans, gross	145,413		153,519
Allowance for credit losses on loans	$ (2,987)	$ (3,056)	$ (2,123)	$ (1,879)	$ (1,817)	$ (1,746)