LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Loans by Risk Category and Past Due Status (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current Year	$ 558,238	$ 786,753
One Year Before	882,676	739,912
Two Years Before	734,001	604,077
Three Years Before	531,003	531,179
Four Years Before	401,290	346,578
Prior	1,048,083	825,610
Revolving Loans	277,623	243,873
Total	4,432,914	4,077,982
Satisfactory
Current Year	558,238	786,753
One Year Before	882,674	739,500
Two Years Before	733,998	603,351
Three Years Before	530,876	531,011
Four Years Before	401,177	346,492
Prior	1,022,962	792,592
Revolving Loans	276,525	242,877
Total	4,406,450	4,042,576
Watch
Current Year	0	0
One Year Before	0	410
Two Years Before	0	582
Three Years Before	0	152
Four Years Before	108	4
Prior	19,894	29,494
Revolving Loans	90	98
Total	20,092	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	2	2
Two Years Before	3	144
Three Years Before	127	16
Four Years Before	5	82
Prior	5,227	3,524
Revolving Loans	1,008	898
Total	6,372	4,666
Commercial Real Estate
Current Year	197,954	141,868
One Year Before	163,891	113,636
Two Years Before	113,057	221,162
Three Years Before	215,620	231,321
Four Years Before	206,914	196,166
Prior	692,600	549,293
Revolving Loans	33,079	22,785
Total	1,623,115	1,476,231
Commercial Real Estate | Satisfactory
Current Year	197,954	141,868
One Year Before	163,891	113,226
Two Years Before	113,057	220,580
Three Years Before	215,620	231,321
Four Years Before	206,914	196,166
Prior	675,346	521,545
Revolving Loans	33,079	22,785
Total	1,605,861	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	15,221	25,742
Revolving Loans	0	0
Total	15,221	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	2,033	2,006
Revolving Loans	0	0
Total	2,033	2,006
Consumer.
Current Year	14,109	20,140
One Year Before	14,701	11,140
Two Years Before	7,897	7,154
Three Years Before	4,490	9,101
Four Years Before	5,581	4,211
Prior	21,296	24,570
Revolving Loans	131,426	130,487
Total	199,500	206,803
Consumer. | Satisfactory
Current Year	14,109	20,140
One Year Before	14,699	11,138
Two Years Before	7,894	7,154
Three Years Before	4,490	9,065
Four Years Before	5,558	4,175
Prior	20,856	24,280
Revolving Loans	130,951	130,111
Total	198,557	206,063
Consumer. | Watch
Current Year	0	0
One Year Before	0	0
Two Years Before	0	0
Three Years Before	0	20
Four Years Before	18	4
Prior	165	10
Revolving Loans	27	29
Total	210	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	2	2
Two Years Before	3	0
Three Years Before	0	16
Four Years Before	5	32
Prior	275	280
Revolving Loans	448	347
Total	733	677
One- to four-family residential construction
Current Year	8,603	23,081
One Year Before	11,816	4,453
Two Years Before	3,477	763
Three Years Before	675	0
Four Years Before	0	0
Prior	0	5
Revolving Loans	11	0
Total	24,582	28,302
One- to four-family residential construction | Satisfactory
Current Year	8,603	23,081
One Year Before	11,816	4,453
Two Years Before	3,477	763
Three Years Before	675	0
Four Years Before	0	0
Prior	0	5
Revolving Loans	11	0
Total	24,582	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	2,658	24,129
One Year Before	23,518	949
Two Years Before	871	224
Three Years Before	207	160
Four Years Before	143	252
Prior	912	980
Revolving Loans	0	0
Total	28,309	26,694
Subdivision construction | Satisfactory
Current Year	2,658	24,129
One Year Before	23,518	949
Two Years Before	871	224
Three Years Before	207	160
Four Years Before	143	252
Prior	901	965
Revolving Loans	0	0
Total	28,298	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	11	15
Revolving Loans	0	0
Total	11	15
Construction and land development
Current Year	13,041	9,968
One Year Before	6,578	15,965
Two Years Before	8,614	11,115
Three Years Before	8,336	2,591
Four Years Before	780	3,013
Prior	5,546	4,184
Revolving Loans	1,056	995
Total	43,951	47,831
Construction and land development | Satisfactory
Current Year	13,041	9,968
One Year Before	6,578	15,965
Two Years Before	8,614	11,115
Three Years Before	8,336	2,591
Four Years Before	780	3,013
Prior	5,546	4,184
Revolving Loans	588	527
Total	43,483	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	32,878	145,991
One Year Before	244,211	298,710
Two Years Before	157,869	130,502
Three Years Before	18,225	42,302
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	453,183	617,505
Other Construction | Satisfactory
Current Year	32,878	145,991
One Year Before	244,211	298,710
Two Years Before	157,869	130,502
Three Years Before	18,225	42,302
Four Years Before	0	0
Prior	0	0
Revolving Loans	0	0
Total	453,183	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	227,799	237,498
One Year Before	228,513	169,765
Two Years Before	138,024	93,792
Three Years Before	78,088	49,750
Four Years Before	42,634	14,757
Prior	117,723	114,549
Revolving Loans	1,078	1,814
Total	833,859	681,925
One- to four-family residential | Satisfactory
Current Year	227,799	237,498
One Year Before	228,513	169,765
Two Years Before	138,024	93,648
Three Years Before	77,961	49,618
Four Years Before	42,544	14,707
Prior	113,750	113,059
Revolving Loans	923	1,662
Total	829,514	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	0	132
Four Years Before	90	0
Prior	1,065	267
Revolving Loans	63	69
Total	1,218	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	127	0
Four Years Before	0	50
Prior	2,908	1,223
Revolving Loans	92	83
Total	3,127	1,500
Other residential
Current Year	41,509	117,029
One Year Before	124,652	96,551
Two Years Before	266,168	115,418
Three Years Before	189,100	179,441
Four Years Before	135,061	104,053
Prior	138,801	73,855
Revolving Loans	22,718	11,605
Total	918,009	697,952
Other residential | Satisfactory
Current Year	41,509	117,029
One Year Before	124,652	96,551
Two Years Before	266,168	115,418
Three Years Before	189,100	179,441
Four Years Before	135,061	104,053
Prior	135,420	70,438
Revolving Loans	22,718	11,605
Total	914,628	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	3,381	3,417
Revolving Loans	0	0
Total	3,381	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	19,687	67,049
One Year Before	64,796	28,743
Two Years Before	38,024	23,947
Three Years Before	16,262	16,513
Four Years Before	10,177	24,126
Prior	71,205	58,174
Revolving Loans	88,255	76,187
Total	308,406	294,739
Commercial business | Satisfactory
Current Year	19,687	67,049
One Year Before	64,796	28,743
Two Years Before	38,024	23,947
Three Years Before	16,262	16,513
Four Years Before	10,177	24,126
Prior	71,143	58,116
Revolving Loans	88,255	76,187
Total	308,344	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	62	58
Revolving Loans	0	0
Total	62	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