LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Investment in Past Due Loans HFI, by Loan Segment and Class (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Financing Receivable, Past Due [Line Items]
Loans HFI	$ 3,399,214	$ 3,314,301
Nonaccrual Loans	18,835	44,632
Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	1,280,028	1,303,019
Nonaccrual Loans	3,057	8,158
Single-family residential mortgages \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	1,761,352	1,655,382
Nonaccrual Loans	896	2,143
Commercial real estate \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	1,280,028	1,303,019
Nonaccrual Loans	3,057	8,158
Construction and land development \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	154,620	155,464
Nonaccrual Loans	7,841	27,994
Commercial and industrial \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	151,796	140,061
Nonaccrual Loans	5,109	5,116
SBA agency securities \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	48,525	55,978
Nonaccrual Loans	1,932	1,221
Other \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	2,893	4,397
Nonaccrual Loans	0	0
30-59 Days
Financing Receivable, Past Due [Line Items]
Loans HFI	4,544	6,714
30-59 Days \| Single-family residential mortgages \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	2,293	5,140
30-59 Days \| Commercial real estate \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	2,136	284
30-59 Days \| Construction and land development \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	0	0
30-59 Days \| Commercial and industrial \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	2	1,277
30-59 Days \| SBA agency securities \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	91	0
30-59 Days \| Other \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	22	13
60-89 Days
Financing Receivable, Past Due [Line Items]
Loans HFI	2,685	2,075
60-89 Days \| Single-family residential mortgages \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	2,057	1,321
60-89 Days \| Commercial real estate \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	194	204
60-89 Days \| Construction and land development \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	0	0
60-89 Days \| Commercial and industrial \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	27	0
60-89 Days \| SBA agency securities \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	407	542
60-89 Days \| Other \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	0	8
90 Days or More
Financing Receivable, Past Due [Line Items]
Loans HFI	0	0
90 Days or More \| Single-family residential mortgages \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	0	0
90 Days or More \| Commercial real estate \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	0	0
90 Days or More \| Construction and land development \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	0	0
90 Days or More \| Commercial and industrial \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	0	0
90 Days or More \| SBA agency securities \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	0	0
90 Days or More \| Other \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	0	0
Total Past Due
Financing Receivable, Past Due [Line Items]
Loans HFI	7,229	8,789
Total Past Due \| Single-family residential mortgages \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	4,350	6,461
Total Past Due \| Commercial real estate \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	2,330	488
Total Past Due \| Construction and land development \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	0	0
Total Past Due \| Commercial and industrial \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	29	1,277
Total Past Due \| SBA agency securities \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	498	542
Total Past Due \| Other \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	22	21
Current
Financing Receivable, Past Due [Line Items]
Loans HFI	3,373,150	3,260,880
Current \| Single-family residential mortgages \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	1,756,106	1,646,778
Current \| Commercial real estate \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	1,274,641	1,294,373
Current \| Construction and land development \| Real estate:
Financing Receivable, Past Due [Line Items]
Loans HFI	146,779	127,470
Current \| Commercial and industrial \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	146,658	133,668
Current \| SBA agency securities \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	46,095	54,215
Current \| Other \| Commercial:
Financing Receivable, Past Due [Line Items]
Loans HFI	$ 2,871	$ 4,376