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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Classes of loans by aging (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	$ 4,781,953	$ 4,661,348
One- to four-family residential construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	27,643	29,628
Subdivision construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	20,077	23,359
Land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	39,023	48,015
Commercial construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	334,299	703,407
Owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	716,572	769,260
Non-owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	121,834	121,275
Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	1,546,005	1,521,032
Other residential (multi-family)
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	1,569,879	942,071
Commercial business
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	227,037	318,050
Industrial revenue bonds
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	11,632	12,047
Consumer auto
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	25,870	28,343
Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	27,353	28,978
Home equity lines of credit
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	114,729	115,883
30-59 Days Past Due
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	2,515	13,125
30-59 Days Past Due | Owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	143	2,778
30-59 Days Past Due | Non-owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	636
30-59 Days Past Due | Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class		187
30-59 Days Past Due | Other residential (multi-family)
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class		9,572
30-59 Days Past Due | Consumer auto
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	18	116
30-59 Days Past Due | Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	105	137
30-59 Days Past Due | Home equity lines of credit
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	1,613	335
60-89 Days Past Due
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	85	308
60-89 Days Past Due | Owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	61	125
60-89 Days Past Due | Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class		92
60-89 Days Past Due | Consumer auto
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	4	65
60-89 Days Past Due | Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	20
60-89 Days Past Due | Home equity lines of credit
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class		26
Over 90 Days Past Due
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	7,483	11,748
Over 90 Days Past Due | Land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	553	384
Over 90 Days Past Due | Owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	68	722
Over 90 Days Past Due | Non-owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	525
Over 90 Days Past Due | Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	6,102	10,552
Over 90 Days Past Due | Commercial business
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	139	31
Over 90 Days Past Due | Consumer auto
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	12	8
Over 90 Days Past Due | Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	84	42
Over 90 Days Past Due | Home equity lines of credit
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class		9
Total Past Due
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	10,083	25,181
Total Past Due | Land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	553	384
Total Past Due | Owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	272	3,625
Total Past Due | Non-owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	1,161
Total Past Due | Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	6,102	10,831
Total Past Due | Other residential (multi-family)
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class		9,572
Total Past Due | Commercial business
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	139	31
Total Past Due | Consumer auto
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	34	189
Total Past Due | Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	209	179
Total Past Due | Home equity lines of credit
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	1,613	370
Current
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	4,771,870	4,636,167
Current | One- to four-family residential construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	27,643	29,628
Current | Subdivision construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	20,077	23,359
Current | Land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	38,470	47,631
Current | Commercial construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	334,299	703,407
Current | Owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	716,300	765,635
Current | Non-owner occupied one- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	120,673	121,275
Current | Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	1,539,903	1,510,201
Current | Other residential (multi-family)
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	1,569,879	932,499
Current | Commercial business
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	226,898	318,019
Current | Industrial revenue bonds
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	11,632	12,047
Current | Consumer auto
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	25,836	28,154
Current | Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	27,144	28,799
Current | Home equity lines of credit
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Financing receivables by class	$ 113,116	$ 115,513

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-14

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 80
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-80

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