LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Risk Rating (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 4,464,834	$ 4,275,178
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total	2,963,948	2,872,117
Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total	83,945	48,583
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total	50,204	41,508
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total	1,249	1,313
Farmland
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	3,218	12,321
One fiscal year before current year	11,779	7,982
Two fiscal years before current year	7,759	1,536
Three fiscal years before current year	1,483	871
Four fiscal years before current year	854	3,419
More than four fiscal years before current year	8,293	5,496
Revolving Loans Amortized Cost Basis	388	543
Revolving Loans Converted to Term	0	0
Total	33,774	32,168
Current period gross write offs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Farmland | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	3,218	12,321
One fiscal year before current year	11,779	7,635
Two fiscal years before current year	7,412	1,536
Three fiscal years before current year	1,483	871
Four fiscal years before current year	854	3,277
More than four fiscal years before current year	7,461	3,523
Revolving Loans Amortized Cost Basis	388	543
Revolving Loans Converted to Term	0	0
Total	32,595	29,706
Farmland | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One fiscal year before current year	0	0
Two fiscal years before current year	0	0
Three fiscal years before current year	0	0
Four fiscal years before current year	0	0
More than four fiscal years before current year	183	1,450
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	183	1,450
Farmland | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One fiscal year before current year	0	347
Two fiscal years before current year	347	0
Three fiscal years before current year	0	0
Four fiscal years before current year	0	142
More than four fiscal years before current year	649	523
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	996	1,012
Farmland | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Owner-occupied, nonfarm nonresidential properties
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	43,167	120,103
One fiscal year before current year	121,527	113,575
Two fiscal years before current year	110,191	66,194
Three fiscal years before current year	60,010	57,776
Four fiscal years before current year	55,494	30,286
More than four fiscal years before current year	85,628	65,773
Revolving Loans Amortized Cost Basis	14,711	14,786
Revolving Loans Converted to Term	0	0
Total	490,728	468,493
Current period gross write offs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	26
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	26
Owner-occupied, nonfarm nonresidential properties | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	43,048	116,701
One fiscal year before current year	118,086	113,575
Two fiscal years before current year	109,495	50,226
Three fiscal years before current year	46,069	55,040
Four fiscal years before current year	47,666	25,327
More than four fiscal years before current year	76,144	60,810
Revolving Loans Amortized Cost Basis	11,346	11,788
Revolving Loans Converted to Term	0	0
Total	451,854	433,467
Owner-occupied, nonfarm nonresidential properties | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	119	3,402
One fiscal year before current year	3,441	0
Two fiscal years before current year	696	15,613
Three fiscal years before current year	13,617	872
Four fiscal years before current year	855	4,097
More than four fiscal years before current year	4,703	814
Revolving Loans Amortized Cost Basis	3,191	2,998
Revolving Loans Converted to Term	0	0
Total	26,622	27,796
Owner-occupied, nonfarm nonresidential properties | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One fiscal year before current year	0	0
Two fiscal years before current year	0	355
Three fiscal years before current year	324	1,864
Four fiscal years before current year	6,973	862
More than four fiscal years before current year	4,781	4,149
Revolving Loans Amortized Cost Basis	174	0
Revolving Loans Converted to Term	0	0
Total	12,252	7,230
Owner-occupied, nonfarm nonresidential properties | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Agricultural production and other loans to farmers
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	70	105
One fiscal year before current year	45	140
Two fiscal years before current year	117	80
Three fiscal years before current year	71	42
Four fiscal years before current year	21	179
More than four fiscal years before current year	173	0
Revolving Loans Amortized Cost Basis	638	652
Revolving Loans Converted to Term	0	0
Total	1,135	1,198
Current period gross write offs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Agricultural production and other loans to farmers | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	70	105
One fiscal year before current year	45	140
Two fiscal years before current year	117	80
Three fiscal years before current year	71	42
Four fiscal years before current year	21	179
More than four fiscal years before current year	173	0
Revolving Loans Amortized Cost Basis	638	652
Revolving Loans Converted to Term	0	0
Total	1,135	1,198
Agricultural production and other loans to farmers | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One fiscal year before current year	0	0
Two fiscal years before current year	0	0
Three fiscal years before current year	0	0
Four fiscal years before current year	0	0
More than four fiscal years before current year	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Agricultural production and other loans to farmers | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One fiscal year before current year	0	0
Two fiscal years before current year	0	0
Three fiscal years before current year	0	0
Four fiscal years before current year	0	0
More than four fiscal years before current year	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Agricultural production and other loans to farmers | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Commercial and Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	49,964	196,495
One fiscal year before current year	161,634	216,555
Two fiscal years before current year	194,793	59,075
Three fiscal years before current year	51,128	17,382
Four fiscal years before current year	13,381	9,456
More than four fiscal years before current year	24,534	20,074
Revolving Loans Amortized Cost Basis	283,270	272,874
Revolving Loans Converted to Term	0	0
Total	778,704	791,911
Current period gross write offs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	46
Revolving Loans Converted to Term	0
Total	46
Commercial and Industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	49,964	195,955
One fiscal year before current year	153,927	213,433
Two fiscal years before current year	187,433	51,695
Three fiscal years before current year	44,128	16,730
Four fiscal years before current year	9,569	9,051
More than four fiscal years before current year	22,036	19,116
Revolving Loans Amortized Cost Basis	264,078	259,841
Revolving Loans Converted to Term	0	0
Total	731,135	765,821
Commercial and Industrial | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	241
One fiscal year before current year	7,505	0
Two fiscal years before current year	3,223	6,691
Three fiscal years before current year	6,362	273
Four fiscal years before current year	355	81
More than four fiscal years before current year	31	45
Revolving Loans Amortized Cost Basis	13,781	7,409
Revolving Loans Converted to Term	0	0
Total	31,257	14,740
Commercial and Industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	299
One fiscal year before current year	202	1,809
Two fiscal years before current year	2,888	689
Three fiscal years before current year	638	379
Four fiscal years before current year	3,457	324
More than four fiscal years before current year	2,467	913
Revolving Loans Amortized Cost Basis	5,411	5,624
Revolving Loans Converted to Term	0	0
Total	15,063	10,037
Commercial and Industrial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One fiscal year before current year	0	1,313
Two fiscal years before current year	1,249	0
Three fiscal years before current year	0	0
Four fiscal years before current year	0	0
More than four fiscal years before current year	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	1,249	1,313
Obligations (other than securities and leases) of states and political subdivisions
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	23,256	20,840
One fiscal year before current year	17,439	37,527
Two fiscal years before current year	32,420	13,868
Three fiscal years before current year	12,706	4,584
Four fiscal years before current year	4,335	13,518
More than four fiscal years before current year	60,301	50,050
Revolving Loans Amortized Cost Basis	4,377	4,958
Revolving Loans Converted to Term	0	0
Total	154,834	145,345
Current period gross write offs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Obligations (other than securities and leases) of states and political subdivisions | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	23,256	20,840
One fiscal year before current year	17,439	37,527
Two fiscal years before current year	32,420	13,868
Three fiscal years before current year	12,706	4,584
Four fiscal years before current year	4,335	13,518
More than four fiscal years before current year	46,822	50,050
Revolving Loans Amortized Cost Basis	4,377	4,958
Revolving Loans Converted to Term	0	0
Total	141,355	145,345
Obligations (other than securities and leases) of states and political subdivisions | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One fiscal year before current year	0	0
Two fiscal years before current year	0	0
Three fiscal years before current year	0	0
Four fiscal years before current year	0	0
More than four fiscal years before current year	13,479	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	13,479	0
Obligations (other than securities and leases) of states and political subdivisions | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One fiscal year before current year	0	0
Two fiscal years before current year	0	0
Three fiscal years before current year	0	0
Four fiscal years before current year	0	0
More than four fiscal years before current year	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Obligations (other than securities and leases) of states and political subdivisions | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Other loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	250	14,248
One fiscal year before current year	12,105	5,358
Two fiscal years before current year	5,324	2,278
Three fiscal years before current year	2,041	363
Four fiscal years before current year	324	0
More than four fiscal years before current year	0	0
Revolving Loans Amortized Cost Basis	10,705	2,463
Revolving Loans Converted to Term	0	0
Total	30,749	24,710
Current period gross write offs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Other loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	250	14,248
One fiscal year before current year	12,105	5,358
Two fiscal years before current year	5,324	2,278
Three fiscal years before current year	2,041	363
Four fiscal years before current year	324	0
More than four fiscal years before current year	0	0
Revolving Loans Amortized Cost Basis	10,705	2,463
Revolving Loans Converted to Term	0	0
Total	30,749	24,710
Other loans | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One fiscal year before current year	0	0
Two fiscal years before current year	0	0
Three fiscal years before current year	0	0
Four fiscal years before current year	0	0
More than four fiscal years before current year	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Other loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One fiscal year before current year	0	0
Two fiscal years before current year	0	0
Three fiscal years before current year	0	0
Four fiscal years before current year	0	0
More than four fiscal years before current year	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	0
Other loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Other construction loans and all land development and other land loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	39,127	273,414
One fiscal year before current year	265,798	88,917
Two fiscal years before current year	93,904	56,782
Three fiscal years before current year	34,554	6,918
Four fiscal years before current year	8,107	8,644
More than four fiscal years before current year	1,508	916
Revolving Loans Amortized Cost Basis	8,045	11,094
Revolving Loans Converted to Term	0	0
Total	451,043	446,685
Current period gross write offs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	0
Other construction loans and all land development and other land loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	39,127	272,118
One fiscal year before current year	261,801	86,894
Two fiscal years before current year	93,433	56,782
Three fiscal years before current year	34,554	6,918
Four fiscal years before current year	6,558	8,644
More than four fiscal years before current year	1,508	916
Revolving Loans Amortized Cost Basis	7,981	11,028
Revolving Loans Converted to Term	0	0
Total	444,962	443,300
Other construction loans and all land development and other land loans | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	1,296
One fiscal year before current year	3,997	0
Two fiscal years before current year	0	0
Three fiscal years before current year	0	0
Four fiscal years before current year	0	0
More than four fiscal years before current year	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	3,997	1,296
Other construction loans and all land development and other land loans | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One fiscal year before current year	0	2,023
Two fiscal years before current year	471	0
Three fiscal years before current year	0	0
Four fiscal years before current year	1,549	0
More than four fiscal years before current year	0	0
Revolving Loans Amortized Cost Basis	64	66
Revolving Loans Converted to Term	0	0
Total	2,084	2,089
Other construction loans and all land development and other land loans | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Multifamily (5 or more) residential properties
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	35,793	115,097
One fiscal year before current year	108,450	49,794
Two fiscal years before current year	44,349	46,784
Three fiscal years before current year	45,547	11,854
Four fiscal years before current year	11,388	7,097
More than four fiscal years before current year	30,355	24,441
Revolving Loans Amortized Cost Basis	947	2,629
Revolving Loans Converted to Term	0	0
Total	276,829	257,696
Current period gross write offs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	65
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	65
Multifamily (5 or more) residential properties | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	35,483	114,454
One fiscal year before current year	108,450	49,794
Two fiscal years before current year	44,349	46,784
Three fiscal years before current year	45,547	11,854
Four fiscal years before current year	11,388	6,764
More than four fiscal years before current year	29,855	23,841
Revolving Loans Amortized Cost Basis	947	2,629
Revolving Loans Converted to Term	0	0
Total	276,019	256,120
Multifamily (5 or more) residential properties | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One fiscal year before current year	0	0
Two fiscal years before current year	0	0
Three fiscal years before current year	0	0
Four fiscal years before current year	0	0
More than four fiscal years before current year	0	510
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	0	510
Multifamily (5 or more) residential properties | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	310	643
One fiscal year before current year	0	0
Two fiscal years before current year	0	0
Three fiscal years before current year	0	0
Four fiscal years before current year	0	333
More than four fiscal years before current year	500	90
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	810	1,066
Multifamily (5 or more) residential properties | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	0
Non-owner occupied, nonfarm nonresidential properties
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	139,785	341,378
One fiscal year before current year	326,481	154,901
Two fiscal years before current year	155,219	51,709
Three fiscal years before current year	45,999	70,955
Four fiscal years before current year	61,051	47,023
More than four fiscal years before current year	143,770	118,643
Revolving Loans Amortized Cost Basis	9,245	10,706
Revolving Loans Converted to Term	0	0
Total	881,550	795,315
Current period gross write offs
2023	0
2022	0
2021	0
2020	0
2019	0
Prior	0
Revolving Loans Amortized Cost Basis	248
Revolving Loans Converted to Term	0
Total	248
Non-owner occupied, nonfarm nonresidential properties | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	139,785	339,151
One fiscal year before current year	324,695	153,613
Two fiscal years before current year	153,944	51,709
Three fiscal years before current year	39,537	66,592
Four fiscal years before current year	56,914	45,211
More than four fiscal years before current year	132,195	107,988
Revolving Loans Amortized Cost Basis	7,074	8,186
Revolving Loans Converted to Term	0	0
Total	854,144	772,450
Non-owner occupied, nonfarm nonresidential properties | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One fiscal year before current year	379	488
Two fiscal years before current year	0	0
Three fiscal years before current year	6,462	273
Four fiscal years before current year	157	498
More than four fiscal years before current year	970	1,068
Revolving Loans Amortized Cost Basis	439	464
Revolving Loans Converted to Term	0	0
Total	8,407	2,791
Non-owner occupied, nonfarm nonresidential properties | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	2,227
One fiscal year before current year	1,407	800
Two fiscal years before current year	1,275	0
Three fiscal years before current year	0	4,090
Four fiscal years before current year	3,980	1,314
More than four fiscal years before current year	10,605	9,587
Revolving Loans Amortized Cost Basis	1,732	2,056
Revolving Loans Converted to Term	0	0
Total	18,999	20,074
Non-owner occupied, nonfarm nonresidential properties | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 0	$ 0