LOANS - Amortized Cost Basis of Loans by Credit Quality Indicator and Class of Loans Based on the Most Recent Analysis Performed (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, Recorded Investment [Line Items]
Year one	$ 491,856		$ 491,856		$ 1,111,109
Current period gross writeoffs, 2023			126
Year two	1,335,533		1,335,533		825,738
Current period gross writeoffs, 2022			517
Year three	933,534		933,534		509,928
Current period gross writeoffs, 2021			329
Year four	585,587		585,587		347,053
Current period gross writeoffs, 2020			166
Year five	386,561		386,561		253,717
Current period gross writeoffs, 2019			309
More than five years	907,587		907,587		607,487
Current period gross writeoffs, prior			528
Revolving Loans	449,142		449,142		119,125
Current period gross writeoffs, revolving			120
Loans held for investment	5,089,800	$ 3,719,000	5,089,800	$ 3,719,000	3,774,157
Loans charged-off	629	241	2,095	898
Commercial, financial and agriculture
Financing Receivable, Recorded Investment [Line Items]
Year one	84,621		84,621		182,191
Current period gross writeoffs, 2023			2
Year two	145,102		145,102		146,362
Current period gross writeoffs, 2022			11
Year three	112,358		112,358		57,354
Current period gross writeoffs, 2021			141
Year four	51,825		51,825		53,988
Current period gross writeoffs, 2020			2
Year five	41,304		41,304		43,474
Current period gross writeoffs, 2019			206
More than five years	70,639		70,639		52,642
Current period gross writeoffs, prior			110
Revolving Loans	282,749		282,749		181
Current period gross writeoffs, revolving			0
Loans held for investment	788,598		788,598		536,192
Loans charged-off	48	0	472	146
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	252,011		252,011		583,617
Current period gross writeoffs, 2023			0
Year two	825,273		825,273		440,836
Current period gross writeoffs, 2022			0
Year three	586,841		586,841		309,986
Current period gross writeoffs, 2021			27
Year four	393,865		393,865		230,963
Current period gross writeoffs, 2020			0
Year five	280,942		280,942		155,364
Current period gross writeoffs, 2019			0
More than five years	651,678		651,678		412,732
Current period gross writeoffs, prior			0
Revolving Loans	5,193		5,193		1,765
Current period gross writeoffs, revolving			0
Loans held for investment	2,995,803		2,995,803		2,135,263
Loans charged-off	27	0	27	27
Consumer real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	134,296		134,296		326,372
Current period gross writeoffs, 2023			1
Year two	350,483		350,483		226,909
Current period gross writeoffs, 2022			19
Year three	225,686		225,686		137,533
Current period gross writeoffs, 2021			0
Year four	136,226		136,226		60,024
Current period gross writeoffs, 2020			0
Year five	62,646		62,646		54,044
Current period gross writeoffs, 2019			0
More than five years	183,795		183,795		140,663
Current period gross writeoffs, prior			25
Revolving Loans	154,436		154,436		113,454
Current period gross writeoffs, revolving			0
Loans held for investment	1,247,568		1,247,568		1,058,999
Loans charged-off	21	55	45	202
Consumer installment
Financing Receivable, Recorded Investment [Line Items]
Year one	20,928		20,928		18,929
Current period gross writeoffs, 2023			123
Year two	14,675		14,675		11,631
Current period gross writeoffs, 2022			487
Year three	8,649		8,649		5,055
Current period gross writeoffs, 2021			161
Year four	3,671		3,671		2,078
Current period gross writeoffs, 2020			164
Year five	1,669		1,669		835
Current period gross writeoffs, 2019			103
More than five years	1,475		1,475		1,450
Current period gross writeoffs, prior			393
Revolving Loans	6,764		6,764		3,725
Current period gross writeoffs, revolving			120
Loans held for investment	57,831		57,831		43,703
Loans charged-off	533	$ 186	1,551	$ 523
Pass
Financing Receivable, Recorded Investment [Line Items]
Year one	491,208		491,208		1,109,434
Year two	1,326,616		1,326,616		815,808
Year three	923,346		923,346		501,913
Year four	579,493		579,493		333,034
Year five	368,147		368,147		236,470
More than five years	837,672		837,672		551,591
Revolving Loans	445,636		445,636		117,949
Loans held for investment	4,972,118		4,972,118		3,666,199
Pass | Commercial, financial and agriculture
Financing Receivable, Recorded Investment [Line Items]
Year one	84,614		84,614		181,761
Year two	144,691		144,691		141,174
Year three	112,186		112,186		55,690
Year four	51,364		51,364		53,954
Year five	39,635		39,635		43,441
More than five years	68,845		68,845		52,038
Revolving Loans	282,705		282,705		181
Loans held for investment	784,040		784,040		528,239
Pass | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	251,872		251,872		582,895
Year two	817,602		817,602		436,661
Year three	577,364		577,364		305,140
Year four	389,861		389,861		217,626
Year five	265,386		265,386		140,682
More than five years	594,553		594,553		368,185
Revolving Loans	5,193		5,193		1,765
Loans held for investment	2,901,831		2,901,831		2,052,954
Pass | Consumer real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	133,794		133,794		325,853
Year two	349,656		349,656		226,355
Year three	225,167		225,167		136,052
Year four	134,661		134,661		59,376
Year five	61,472		61,472		51,515
More than five years	172,799		172,799		129,923
Revolving Loans	150,975		150,975		112,278
Loans held for investment	1,228,524		1,228,524		1,041,352
Pass | Consumer installment
Financing Receivable, Recorded Investment [Line Items]
Year one	20,928		20,928		18,925
Year two	14,667		14,667		11,618
Year three	8,629		8,629		5,031
Year four	3,607		3,607		2,078
Year five	1,654		1,654		832
More than five years	1,475		1,475		1,445
Revolving Loans	6,763		6,763		3,725
Loans held for investment	57,723		57,723		43,654
Special mention
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		1,052
Year two	1,373		1,373		6,533
Year three	7,283		7,283		5,602
Year four	3,353		3,353		11,643
Year five	11,815		11,815		10,708
More than five years	19,348		19,348		20,870
Revolving Loans	421		421		0
Loans held for investment	43,593		43,593		56,408
Special mention | Commercial, financial and agriculture
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		380
Year two	0		0		5,188
Year three	0		0		1,664
Year four	159		159		0
Year five	1,081		1,081		0
More than five years	966		966		412
Revolving Loans	10		10		0
Loans held for investment	2,216		2,216		7,644
Special mention | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		672
Year two	662		662		1,345
Year three	7,283		7,283		3,938
Year four	3,194		3,194		11,643
Year five	10,084		10,084		9,885
More than five years	15,061		15,061		16,612
Revolving Loans	0		0		0
Loans held for investment	36,284		36,284		44,095
Special mention | Consumer real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		0
Year two	711		711		0
Year three	0		0		0
Year four	0		0		0
Year five	650		650		823
More than five years	3,321		3,321		3,846
Revolving Loans	411		411		0
Loans held for investment	5,093		5,093		4,669
Special mention | Consumer installment
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
More than five years	0		0		0
Revolving Loans	0		0		0
Loans held for investment	0		0		0
Substandard
Financing Receivable, Recorded Investment [Line Items]
Year one	648		648		623
Year two	7,544		7,544		3,397
Year three	2,905		2,905		2,413
Year four	2,741		2,741		2,376
Year five	6,599		6,599		6,539
More than five years	50,567		50,567		35,026
Revolving Loans	3,085		3,085		1,176
Loans held for investment	74,089		74,089		51,550
Substandard | Commercial, financial and agriculture
Financing Receivable, Recorded Investment [Line Items]
Year one	7		7		50
Year two	411		411		0
Year three	172		172		0
Year four	302		302		34
Year five	588		588		33
More than five years	828		828		192
Revolving Loans	34		34		0
Loans held for investment	2,342		2,342		309
Substandard | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	139		139		50
Year two	7,009		7,009		2,830
Year three	2,194		2,194		908
Year four	810		810		1,694
Year five	5,472		5,472		4,797
More than five years	42,064		42,064		27,935
Revolving Loans	0		0		0
Loans held for investment	57,688		57,688		38,214
Substandard | Consumer real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	502		502		519
Year two	116		116		554
Year three	519		519		1,481
Year four	1,565		1,565		648
Year five	524		524		1,706
More than five years	7,675		7,675		6,894
Revolving Loans	3,050		3,050		1,176
Loans held for investment	13,951		13,951		12,978
Substandard | Consumer installment
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		4
Year two	8		8		13
Year three	20		20		24
Year four	64		64		0
Year five	15		15		3
More than five years	0		0		5
Revolving Loans	1		1		0
Loans held for investment	108		108		49
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
More than five years	0		0		0
Revolving Loans	0		0		0
Loans held for investment	0		0		0
Doubtful | Commercial, financial and agriculture
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
More than five years	0		0		0
Revolving Loans	0		0		0
Loans held for investment	0		0		0
Doubtful | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
More than five years	0		0		0
Revolving Loans	0		0		0
Loans held for investment	0		0		0
Doubtful | Consumer real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
More than five years	0		0		0
Revolving Loans	0		0		0
Loans held for investment	0		0		0
Doubtful | Consumer installment
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		0
Year two	0		0		0
Year three	0		0		0
Year four	0		0		0
Year five	0		0		0
More than five years	0		0		0
Revolving Loans	0		0		0
Loans held for investment	$ 0		$ 0		$ 0