LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loans by category and risk rating separated by origination and loan class (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total	$ 4,705,108	$ 4,661,348
Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	21,138	53,158
One Year Before	70,090	284,738
Two Years Before	319,752	237,822
Three Years Before	225,968	103,393
Four Years Before	97,191	161,834
Prior	749,154	644,811
Revolving Loans	28,379	35,276
Total	1,511,672	1,521,032
Commercial real estate | Satisfactory
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	21,138	53,158
One Year Before	70,090	284,738
Two Years Before	319,641	237,822
Three Years Before	225,881	103,393
Four Years Before	97,191	161,680
Prior	730,152	624,515
Revolving Loans	28,379	35,276
Total	1,492,472	1,500,582
Commercial real estate | Watch
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Four Years Before		154
Prior	5,078	5,348
Total	5,078	5,502
Commercial real estate | Special Mention
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Prior		4,396
Total		4,396
Commercial real estate | Classified
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Two Years Before	111
Three Years Before	87
Prior	13,924	10,552
Total	14,122	10,552
Consumer
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	10,526	16,629
One Year Before	12,548	12,055
Two Years Before	8,611	6,196
Three Years Before	3,976	2,817
Four Years Before	1,749	831
Prior	11,096	12,339
Revolving Loans	119,648	122,337
Total	168,154	173,204
Current Period Gross Charge Offs
Current Year	5	4
One Year Before	67	135
Two year Before	93	24
Three year Before	23	3
Four Year Before	3	18
Prior	548	1,493
Revolving Loans	41	77
Total	780	1,754
Consumer | Satisfactory
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	10,524	16,629
One Year Before	12,545	12,010
Two Years Before	8,584	6,163
Three Years Before	3,921	2,811
Four Years Before	1,745	828
Prior	10,821	12,089
Revolving Loans	118,894	122,166
Total	167,034	172,696
Consumer | Watch
LOANS AND ALLOWANCE FOR CREDIT LOSSES
One Year Before		3
Two Years Before	2	21
Three Years Before	18	6
Four Years Before	4	3
Prior	199	201
Revolving Loans	111	154
Total	334	388
Consumer | Special Mention
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Revolving Loans		8
Total		8
Consumer | Classified
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	2
One Year Before	3	42
Two Years Before	25	12
Three Years Before	37
Prior	76	49
Revolving Loans	643	9
Total	786	112
Combined
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	102,795	302,681
One Year Before	346,854	1,275,272
Two Years Before	1,396,163	1,105,013
Three Years Before	1,065,296	430,496
Four Years Before	415,422	346,862
Prior	1,156,962	969,027
Revolving Loans	221,616	231,997
Total	4,705,108	4,661,348
Current Period Gross Charge Offs
Current Year	5	4
One Year Before	116	142
Two year Before	93	24
Three year Before	27	3
Four Year Before	30	18
Prior	664	2,534
Revolving Loans	41	97
Total	976	2,822
Combined | Satisfactory
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	102,593	302,681
One Year Before	346,851	1,274,041
Two Years Before	1,393,933	1,100,593
Three Years Before	1,060,960	430,315
Four Years Before	415,222	346,534
Prior	1,133,299	926,576
Revolving Loans	209,662	226,496
Total	4,662,520	4,607,236
Combined | Watch
LOANS AND ALLOWANCE FOR CREDIT LOSSES
One Year Before		3
Two Years Before	996	21
Three Years Before	18	6
Four Years Before	150	328
Prior	5,982	7,780
Revolving Loans	111	200
Total	7,257	8,338
Combined | Special Mention
LOANS AND ALLOWANCE FOR CREDIT LOSSES
One Year Before		1,186
Two Years Before	1,098	3,840
Three Years Before	3,670
Four Years Before	43
Prior	2,731	16,718
Revolving Loans	11,200	4,908
Total	18,742	26,652
Combined | Classified
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	202
One Year Before	3	42
Two Years Before	136	559
Three Years Before	648	175
Four Years Before	7
Prior	14,950	17,953
Revolving Loans	643	393
Total	16,589	19,122
One- to four-family residential construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	3,519	12,528
One Year Before	16,346	9,878
Two Years Before	3,704	41
Three Years Before	40
Revolving Loans	6,109	7,181
Total	29,718	29,628
One- to four-family residential construction | Satisfactory
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	3,519	12,528
One Year Before	16,346	9,878
Two Years Before	3,704	41
Three Years Before	40
Revolving Loans	6,109	7,181
Total	29,718	29,628
Subdivision construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year		532
One Year Before	284	1,022
Two Years Before	703	21,333
Three Years Before	17,681	43
Four Years Before	31	64
Prior	269	365
Revolving Loans	459
Total	19,427	23,359
Subdivision construction | Satisfactory
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year		532
One Year Before	284	1,022
Two Years Before	703	21,333
Three Years Before	17,681	43
Four Years Before	31	64
Prior	269	365
Revolving Loans	459
Total	19,427	23,359
Construction and land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	6,524	14,860
One Year Before	12,766	12,564
Two Years Before	7,068	5,658
Three Years Before	5,191	3,682
Four Years Before	3,651	5,458
Prior	7,286	4,531
Revolving Loans	705	1,262
Total	43,191	48,015
Current Period Gross Charge Offs
Prior	101
Total	101
Construction and land development | Satisfactory
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	6,524	14,860
One Year Before	12,766	12,564
Two Years Before	7,068	5,658
Three Years Before	5,191	3,682
Four Years Before	3,651	5,458
Prior	7,286	4,531
Revolving Loans	705	878
Total	43,191	47,631
Construction and land development | Classified
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Revolving Loans		384
Total		384
Other construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	22,655	60,895
One Year Before	68,085	422,727
Two Years Before	353,154	203,918
Three Years Before	87,020	15,867
Four Years Before	19,317
Total	550,231	703,407
Other construction | Satisfactory
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	22,655	60,895
One Year Before	68,085	422,727
Two Years Before	353,154	203,918
Three Years Before	87,020	15,867
Four Years Before	19,317
Total	550,231	703,407
One- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	22,252	66,733
One Year Before	64,870	330,489
Two Years Before	320,685	204,324
Three Years Before	186,343	108,380
Four Years Before	102,092	60,459
Prior	167,348	119,621
Revolving Loans	533	529
Total	864,123	890,535
Current Period Gross Charge Offs
One Year Before	49
Prior	15	11
Revolving Loans		20
Total	64	31
One- to four-family residential | Satisfactory
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	22,252	66,733
One Year Before	64,870	330,489
Two Years Before	320,685	203,781
Three Years Before	185,819	108,232
Four Years Before	101,946	60,288
Prior	165,704	118,570
Revolving Loans	533	483
Total	861,809	888,576
One- to four-family residential | Watch
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Four Years Before	146	171
Prior	694	862
Revolving Loans		46
Total	840	1,079
One- to four-family residential | Classified
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Two Years Before		543
Three Years Before	524	148
Prior	950	189
Total	1,474	880
Other residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	6,542	18,795
One Year Before	66,124	108,389
Two Years Before	310,672	391,516
Three Years Before	511,679	180,916
Four Years Before	181,521	108,173
Prior	171,156	130,947
Revolving Loans	3,282	3,335
Total	1,250,976	942,071
Other residential | Satisfactory
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	6,542	18,795
One Year Before	66,124	108,389
Two Years Before	310,672	391,516
Three Years Before	511,679	180,916
Four Years Before	181,521	108,173
Prior	168,425	111,462
Revolving Loans	3,282	3,335
Total	1,248,245	922,586
Other residential | Special Mention
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Prior	2,731	12,322
Total	2,731	12,322
Other residential | Classified
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Prior		7,163
Total		7,163
Commercial business
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	9,639	58,551
One Year Before	35,741	93,410
Two Years Before	71,814	34,205
Three Years Before	27,398	15,398
Four Years Before	9,870	10,043
Prior	50,653	56,413
Revolving Loans	62,501	62,077
Total	267,616	330,097
Current Period Gross Charge Offs
One Year Before		7
Three year Before	4
Four Year Before	27
Prior		1,030
Total	31	1,037
Commercial business | Satisfactory
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	9,439	58,551
One Year Before	35,741	92,224
Two Years Before	69,722	30,361
Three Years Before	23,728	15,371
Four Years Before	9,820	10,043
Prior	50,642	55,044
Revolving Loans	51,301	57,177
Total	250,393	318,771
Commercial business | Watch
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Two Years Before	994
Prior	11	1,369
Total	1,005	1,369
Commercial business | Special Mention
LOANS AND ALLOWANCE FOR CREDIT LOSSES
One Year Before		1,186
Two Years Before	1,098	3,840
Three Years Before	3,670
Four Years Before	43
Revolving Loans	11,200	4,900
Total	16,011	9,926
Commercial business | Classified
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Current Year	200
Two Years Before		4
Three Years Before		27
Four Years Before	7
Total	$ 207	$ 31