LOANS HELD FOR INVESTMENT - Amortized Cost Basis of Loans Modified to Borrowers Experiencing Financial Difficulty and Financial Effects of Loan Modifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
LOANS HELD FOR INVESTMENT [Abstract]
% of total class of financing receivable	0.18%	0.09%	0.19%	0.11%
Nonaccrual	$ 4,146	$ 1,536	$ 4,146	$ 1,536
Commercial Real Estate [Member]
LOANS HELD FOR INVESTMENT [Abstract]
% of total class of financing receivable	0.07%	0.01%	0.07%	0.01%
Weighted-average interest rate reduction	0.00%	0.00%	0.00%	0.00%
Weighted-average term extension	9 years		9 years	12 years
Nonaccrual	$ 0	$ 0	$ 0	$ 0
1-4 Family residential	0.00%	0.00%	0.00%	0.00%
Construction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
% of total class of financing receivable	0.54%	2.30%	0.54%	2.30%
Weighted-average interest rate reduction	0.00%	4.25%	0.00%	4.25%
Weighted-average term extension	3 years	6 years	3 years	6 years
Nonaccrual	$ 0	$ 1,442	$ 0	$ 1,442
1-4 Family residential	0.00%	4.25%	0.00%	4.25%
Specialized [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
% of total class of financing receivable	0.03%	0.00%	0.03%	0.00%
Weighted-average interest rate reduction	0.00%	0.00%	0.00%	0.00%
Weighted-average term extension	11 years		11 years
Nonaccrual	$ 101	$ 14	$ 101	$ 14
1-4 Family residential	0.00%	0.00%	0.00%	0.00%
General [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
% of total class of financing receivable	0.65%	0.00%	0.70%	0.09%
Weighted-average interest rate reduction	0.00%	0.00%	1.00%	1.75%
Weighted-average term extension	5 years	3 years	7 years	15 years
Nonaccrual	$ 4,045	$ 80	$ 4,045	$ 80
1-4 Family residential	0.00%	0.00%	1.00%	1.75%
1-4 Family Residential [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
% of total class of financing receivable	0.00%	0.05%	0.00%	0.05%
Weighted-average interest rate reduction	0.00%	0.00%	0.00%	0.00%
Nonaccrual	$ 0	$ 0	$ 0	$ 0
1-4 Family residential	0.00%	0.00%	0.00%	0.00%
Auto Loans [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
% of total class of financing receivable	0.00%	0.00%	0.02%	0.00%
Weighted-average interest rate reduction	0.00%	0.00%	1.20%	0.00%
Weighted-average term extension			50 years
Nonaccrual	$ 0	$ 0	$ 0	$ 0
1-4 Family residential	0.00%	0.00%	1.20%	0.00%
Other Consumer [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
% of total class of financing receivable	0.00%	0.00%	0.02%	0.00%
Weighted-average interest rate reduction	0.00%	0.00%	0.00%	0.00%
Weighted-average term extension			5 years
Nonaccrual	$ 0	$ 0	$ 0	$ 0
1-4 Family residential	0.00%	0.00%	0.00%	0.00%
Current [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	$ 1,217	$ 5,240	$ 1,217	$ 5,240
Current [Member] | Commercial Real Estate [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	727	2,220	727	2,220
Current [Member] | Construction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	1,240	0	1,240
Current [Member] | Specialized [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Current [Member] | General [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	243	969	243	969
Current [Member] | 1-4 Family Residential [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	185	762	185	762
Current [Member] | Auto Loans [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	47	49	47	49
Current [Member] | Other Consumer [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	15	0	15	0
30-89 Days Past Due [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	922	96	922	96
30-89 Days Past Due [Member] | Commercial Real Estate [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
30-89 Days Past Due [Member] | Construction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	529	96	529	96
30-89 Days Past Due [Member] | Specialized [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
30-89 Days Past Due [Member] | General [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	156	0	156	0
30-89 Days Past Due [Member] | 1-4 Family Residential [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	237	0	237	0
30-89 Days Past Due [Member] | Auto Loans [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
30-89 Days Past Due [Member] | Other Consumer [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
90 Days or More Past Due [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	84	21	84	21
90 Days or More Past Due [Member] | Commercial Real Estate [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
90 Days or More Past Due [Member] | Construction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
90 Days or More Past Due [Member] | Specialized [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
90 Days or More Past Due [Member] | General [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
90 Days or More Past Due [Member] | 1-4 Family Residential [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	84	21	84	21
90 Days or More Past Due [Member] | Auto Loans [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
90 Days or More Past Due [Member] | Other Consumer [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	337	44	352
Payment Delay [Member] | Commercial Real Estate [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	74	0	74
Payment Delay [Member] | Construction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay [Member] | Specialized [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	15
Payment Delay [Member] | General [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay [Member] | 1-4 Family Residential [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	263	0	263
Payment Delay [Member] | Auto Loans [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	44	0
Payment Delay [Member] | Other Consumer [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Term Extension [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	793	0	1,045	508
Term Extension [Member] | Commercial Real Estate [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	124	0	124	67
Term Extension [Member] | Construction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	530	0	530	0
Term Extension [Member] | Specialized [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Term Extension [Member] | General [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	139	0	391	441
Term Extension [Member] | 1-4 Family Residential [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Term Extension [Member] | Auto Loans [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Term Extension [Member] | Other Consumer [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Rate Reduction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	820	0	820
Rate Reduction [Member] | Commercial Real Estate [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Rate Reduction [Member] | Construction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	820	0	820
Rate Reduction [Member] | Specialized [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Rate Reduction [Member] | General [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Rate Reduction [Member] | 1-4 Family Residential [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Rate Reduction [Member] | Auto Loans [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Rate Reduction [Member] | Other Consumer [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Term Extension and Payment Delay [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	4,660	1,549	4,718	1,549
Term Extension and Payment Delay [Member] | Commercial Real Estate [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	604	0	604	0
Term Extension and Payment Delay [Member] | Construction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	1,538	0	1,538
Term Extension and Payment Delay [Member] | Specialized [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	101	0	101	0
Term Extension and Payment Delay [Member] | General [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	3,955	11	3,998	11
Term Extension and Payment Delay [Member] | 1-4 Family Residential [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Term Extension and Payment Delay [Member] | Auto Loans [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Term Extension and Payment Delay [Member] | Other Consumer [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	15	0
Term Extension and Interest Rate Reduction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	35
Term Extension and Interest Rate Reduction [Member] | Commercial Real Estate [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Term Extension and Interest Rate Reduction [Member] | Construction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Term Extension and Interest Rate Reduction [Member] | Specialized [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Term Extension and Interest Rate Reduction [Member] | General [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	35
Term Extension and Interest Rate Reduction [Member] | 1-4 Family Residential [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Term Extension and Interest Rate Reduction [Member] | Auto Loans [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Term Extension and Interest Rate Reduction [Member] | Other Consumer [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay and Interest Rate Reduction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay and Interest Rate Reduction [Member] | Commercial Real Estate [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay and Interest Rate Reduction [Member] | Construction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay and Interest Rate Reduction [Member] | Specialized [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay and Interest Rate Reduction [Member] | General [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay and Interest Rate Reduction [Member] | 1-4 Family Residential [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay and Interest Rate Reduction [Member] | Auto Loans [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay and Interest Rate Reduction [Member] | Other Consumer [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay, Term Extension, and Interest Rate Reduction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	11	0
Payment Delay, Term Extension, and Interest Rate Reduction [Member] | Commercial Real Estate [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay, Term Extension, and Interest Rate Reduction [Member] | Construction [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay, Term Extension, and Interest Rate Reduction [Member] | Specialized [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay, Term Extension, and Interest Rate Reduction [Member] | General [Member] | Commercial [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	8	0
Payment Delay, Term Extension, and Interest Rate Reduction [Member] | 1-4 Family Residential [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	0	0
Payment Delay, Term Extension, and Interest Rate Reduction [Member] | Auto Loans [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	0	0	3	0
Payment Delay, Term Extension, and Interest Rate Reduction [Member] | Other Consumer [Member] | Consumer [Member]
LOANS HELD FOR INVESTMENT [Abstract]
Loans modified	$ 0	$ 0	$ 0	$ 0