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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Loans by Risk Category and Past Due Status (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current Year	$ 762,648	$ 786,753
One Year Before	974,193	739,912
Two Years Before	697,511	604,077
Three Years Before	509,564	531,179
Four Years Before	392,417	346,578
Prior	962,761	825,610
Revolving Loans	272,005	243,873
Total	4,571,099	4,077,982
Satisfactory
Current Year	762,648	786,753
One Year Before	974,158	739,500
Two Years Before	697,498	603,351
Three Years Before	509,375	531,011
Four Years Before	392,323	346,492
Prior	930,188	792,592
Revolving Loans	270,905	242,877
Total	4,537,095	4,042,576
Watch
Current Year	0	0
One Year Before	30	410
Two Years Before	0	582
Three Years Before	189	152
Four Years Before	89	4
Prior	28,418	29,494
Revolving Loans	160	98
Total	28,886	30,740
Special Mention
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Classified
Current Year	0	0
One Year Before	5	2
Two Years Before	13	144
Three Years Before	0	16
Four Years Before	5	82
Prior	4,155	3,524
Revolving Loans	940	898
Total	5,118	4,666
Commercial real estate.
Current Year	204,359	141,868
One Year Before	174,769	113,636
Two Years Before	112,680	221,162
Three Years Before	214,892	231,321
Four Years Before	201,908	196,166
Prior	636,319	549,293
Revolving Loans	31,602	22,785
Total	1,576,529	1,476,231
Commercial real estate. | Satisfactory
Current Year	204,359	141,868
One Year Before	174,769	113,226
Two Years Before	112,680	220,580
Three Years Before	214,892	231,321
Four Years Before	201,908	196,166
Prior	610,957	521,545
Revolving Loans	31,602	22,785
Total	1,551,167	1,447,491
Commercial real estate. | Watch
Current Year	0	0
One Year Before	0	410
Two Years Before	0	582
Three Years Before	0	0
Four Years Before	0	0
Prior	23,548	25,742
Revolving Loans	0	0
Total	23,548	26,734
Commercial real estate. | Special Mention
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Commercial real estate. | Classified
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	1,814	2,006
Revolving Loans	0	0
Total	1,814	2,006
Consumer
Current Year	18,712	20,140
One Year Before	12,796	11,140
Two Years Before	6,713	7,154
Three Years Before	3,534	9,101
Four Years Before	4,151	4,211
Prior	18,818	24,570
Revolving Loans	132,513	130,487
Total	197,237	206,803
Consumer | Satisfactory
Current Year	18,712	20,140
One Year Before	12,761	11,138
Two Years Before	6,700	7,154
Three Years Before	3,526	9,065
Four Years Before	4,146	4,175
Prior	18,424	24,280
Revolving Loans	132,025	130,111
Total	196,294	206,063
Consumer | Watch
Current Year	0	0
One Year Before	30	0
Two Years Before	0	0
Three Years Before	8	20
Four Years Before	0	4
Prior	161	10
Revolving Loans	100	29
Total	299	63
Consumer | Special Mention
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Consumer | Classified
Current Year	0	0
One Year Before	5	2
Two Years Before	13	0
Three Years Before	0	16
Four Years Before	5	32
Prior	233	280
Revolving Loans	388	347
Total	644	677
One- to four-family residential construction
Current Year	18,381	23,081
One Year Before	10,834	4,453
Two Years Before	2,551	763
Three Years Before	0	0
Four Years Before	0	0
Prior	216	5
Revolving Loans	0	0
Total	31,982	28,302
One- to four-family residential construction | Satisfactory
Current Year	18,381	23,081
One Year Before	10,834	4,453
Two Years Before	2,551	763
Three Years Before	0	0
Four Years Before	0	0
Prior	216	5
Revolving Loans	0	0
Total	31,982	28,302
One- to four-family residential construction | Watch
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
One- to four-family residential construction | Special Mention
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
One- to four-family residential construction | Classified
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Subdivision construction
Current Year	4,240	24,129
One Year Before	26,362	949
Two Years Before	757	224
Three Years Before	204	160
Four Years Before	142	252
Prior	608	980
Revolving Loans	664	0
Total	32,977	26,694
Subdivision construction | Satisfactory
Current Year	4,240	24,129
One Year Before	26,362	949
Two Years Before	757	224
Three Years Before	204	160
Four Years Before	142	252
Prior	608	965
Revolving Loans	664	0
Total	32,977	26,679
Subdivision construction | Watch
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Subdivision construction | Special Mention
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Subdivision construction | Classified
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	15
Revolving Loans	0	0
Total	0	15
Construction and land development
Current Year	15,441	9,968
One Year Before	6,579	15,965
Two Years Before	5,451	11,115
Three Years Before	8,280	2,591
Four Years Before	771	3,013
Prior	5,285	4,184
Revolving Loans	1,064	995
Total	42,871	47,831
Construction and land development | Satisfactory
Current Year	15,441	9,968
One Year Before	6,579	15,965
Two Years Before	5,451	11,115
Three Years Before	8,280	2,591
Four Years Before	771	3,013
Prior	5,285	4,184
Revolving Loans	596	527
Total	42,403	47,363
Construction and land development | Watch
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Construction and land development | Special Mention
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Construction and land development | Classified
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	468	468
Total	468	468
Other Construction
Current Year	83,318	145,991
One Year Before	318,197	298,710
Two Years Before	161,223	130,502
Three Years Before	20,336	42,302
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	583,074	617,505
Other Construction | Satisfactory
Current Year	83,318	145,991
One Year Before	318,197	298,710
Two Years Before	161,223	130,502
Three Years Before	20,336	42,302
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	583,074	617,505
Other Construction | Watch
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Other Construction | Special Mention
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Other Construction | Classified
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
One- to four-family residential.
Current Year	309,787	237,498
One Year Before	220,044	169,765
Two Years Before	131,304	93,792
Three Years Before	74,957	49,750
Four Years Before	41,166	14,757
Prior	105,019	114,549
Revolving Loans	947	1,814
Total	883,224	681,925
One- to four-family residential. | Satisfactory
Current Year	309,787	237,498
One Year Before	220,044	169,765
Two Years Before	131,304	93,648
Three Years Before	74,776	49,618
Four Years Before	41,077	14,707
Prior	101,610	113,059
Revolving Loans	803	1,662
Total	879,401	679,957
One- to four-family residential. | Watch
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	181	132
Four Years Before	89	0
Prior	1,301	267
Revolving Loans	60	69
Total	1,631	468
One- to four-family residential. | Special Mention
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
One- to four-family residential. | Classified
Current Year	0	0
One Year Before	0	0
Two Years Before	0	144
Three Years Before	0	0
Four Years Before	0	50
Prior	2,108	1,223
Revolving Loans	84	83
Total	2,192	1,500
Other residential
Current Year	77,919	117,029
One Year Before	137,890	96,551
Two Years Before	236,600	115,418
Three Years Before	171,455	179,441
Four Years Before	134,426	104,053
Prior	131,037	73,855
Revolving Loans	25,366	11,605
Total	914,693	697,952
Other residential | Satisfactory
Current Year	77,919	117,029
One Year Before	137,890	96,551
Two Years Before	236,600	115,418
Three Years Before	171,455	179,441
Four Years Before	134,426	104,053
Prior	127,677	70,438
Revolving Loans	25,366	11,605
Total	911,333	694,535
Other residential | Watch
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	3,360	3,417
Revolving Loans	0	0
Total	3,360	3,417
Other residential | Special Mention
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Other residential | Classified
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Commercial business
Current Year	30,491	67,049
One Year Before	66,722	28,743
Two Years Before	40,232	23,947
Three Years Before	15,906	16,513
Four Years Before	9,853	24,126
Prior	65,459	58,174
Revolving Loans	79,849	76,187
Total	308,512	294,739
Commercial business | Satisfactory
Current Year	30,491	67,049
One Year Before	66,722	28,743
Two Years Before	40,232	23,947
Three Years Before	15,906	16,513
Four Years Before	9,853	24,126
Prior	65,411	58,116
Revolving Loans	79,849	76,187
Total	308,464	294,681
Commercial business | Watch
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	48	58
Revolving Loans	0	0
Total	48	58
Commercial business | Special Mention
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	0	0
Commercial business | Classified
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	0
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	$ 0	$ 0

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