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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Loans Classified by Aging Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	$ 4,571,099	$ 4,077,552
One- to four-family residential construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	31,982	28,302
Subdivision construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	32,977	26,694
Land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	42,871	47,827
Commercial construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	583,074	617,505
Owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	765,511	561,958
Non-owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	117,713	119,635
Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	1,576,529	1,476,230
Other residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	914,693	697,903
Commercial business
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	295,476	280,513
Industrial revenue bonds
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	13,036	14,203
Consumer auto
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	39,912	48,915
Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	35,542	37,902
Home equity lines of credit
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	121,783	119,965
30-59 Days Past Due
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	707	2,631
30-59 Days Past Due | Land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable		29
30-59 Days Past Due | Owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	281	843
30-59 Days Past Due | Commercial business
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	52	1,404
30-59 Days Past Due | Consumer auto
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	96	229
30-59 Days Past Due | Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	278	126
60-89 Days Past Due
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	321	76
60-89 Days Past Due | Land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable		15
60-89 Days Past Due | Owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	292	2
60-89 Days Past Due | Consumer auto
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	17	31
60-89 Days Past Due | Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	12	28
Over 90 Days Past Due
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	3,293	5,423
Over 90 Days Past Due | Land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	468	468
Over 90 Days Past Due | Owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	821	2,216
Over 90 Days Past Due | Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	1,618	2,006
Over 90 Days Past Due | Consumer auto
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	13	34
Over 90 Days Past Due | Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	65	63
Over 90 Days Past Due | Home equity lines of credit
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	308	636
Total Past Due
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	4,321	8,130
Total Past Due | Land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	468	512
Total Past Due | Owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	1,394	3,061
Total Past Due | Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	1,618	2,006
Total Past Due | Commercial business
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	52	1,404
Total Past Due | Consumer auto
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	126	294
Total Past Due | Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	355	217
Total Past Due | Home equity lines of credit
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	308	636
Current
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	4,566,778	4,069,422
Current | One- to four-family residential construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	31,982	28,302
Current | Subdivision construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	32,977	26,694
Current | Land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	42,403	47,315
Current | Commercial construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	583,074	617,505
Current | Owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	764,117	558,897
Current | Non-owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	117,713	119,635
Current | Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	1,574,911	1,474,224
Current | Other residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	914,693	697,903
Current | Commercial business
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	295,424	279,109
Current | Industrial revenue bonds
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	13,036	14,203
Current | Consumer auto
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	39,786	48,621
Current | Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	35,187	37,685
Current | Home equity lines of credit
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loans receivable	$ 121,475	$ 119,329

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