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		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Financing Receivable, Recorded Investment [Line Items]
Year one	$ 279,452		$ 279,452		$ 1,111,109
Current period gross writeoffs, 2023			47
Year two	1,350,441		1,350,441		825,738
Current period gross writeoffs, 2022			402
Year three	973,231		973,231		509,928
Current period gross writeoffs, 2021			226
Year four	603,415		603,415		347,053
Current period gross writeoffs, 2020			130
Year five	406,539		406,539		253,717
Current period gross writeoffs, 2019			272
More than five years	960,720		960,720		607,487
Current period gross writeoffs, prior			356
Revolving Loans	437,127		437,127		119,125
Current period gross writeoffs, revolving			33
Loans held for investment	5,010,925		5,010,925		3,774,157
Loans charged-off	1,126	$ 426	1,466	$ 657
Commercial, financial and agriculture
Financing Receivable, Recorded Investment [Line Items]
Year one	63,256		63,256		182,191
Current period gross writeoffs, 2023			0
Year two	154,362		154,362		146,362
Current period gross writeoffs, 2022			11
Year three	120,145		120,145		57,354
Current period gross writeoffs, 2021			95
Year four	56,074		56,074		53,988
Current period gross writeoffs, 2020			2
Year five	44,818		44,818		43,474
Current period gross writeoffs, 2019			206
More than five years	76,987		76,987		52,642
Current period gross writeoffs, prior			110
Revolving Loans	274,653		274,653		181
Current period gross writeoffs, revolving			0
Loans held for investment	790,295		790,295		536,192
Loans charged-off	421	94	424	146
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	115,044		115,044		583,617
Current period gross writeoffs, 2023			0
Year two	808,827		808,827		440,836
Current period gross writeoffs, 2022			0
Year three	605,698		605,698		309,986
Current period gross writeoffs, 2021			0
Year four	401,625		401,625		230,963
Current period gross writeoffs, 2020			0
Year five	294,714		294,714		155,364
Current period gross writeoffs, 2019			0
More than five years	686,432		686,432		412,732
Current period gross writeoffs, prior			0
Revolving Loans	3,546		3,546		1,765
Current period gross writeoffs, revolving			0
Loans held for investment	2,915,886		2,915,886		2,135,263
Loans charged-off	0	24	0	27
Consumer real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	87,387		87,387		326,372
Current period gross writeoffs, 2023			0
Year two	370,060		370,060		226,909
Current period gross writeoffs, 2022			21
Year three	237,378		237,378		137,533
Current period gross writeoffs, 2021			0
Year four	141,257		141,257		60,024
Current period gross writeoffs, 2020			0
Year five	65,047		65,047		54,044
Current period gross writeoffs, 2019			0
More than five years	195,682		195,682		140,663
Current period gross writeoffs, prior			3
Revolving Loans	152,484		152,484		113,454
Current period gross writeoffs, revolving			0
Loans held for investment	1,249,295		1,249,295		1,058,999
Loans charged-off	24	140	24	147
Consumer installment
Financing Receivable, Recorded Investment [Line Items]
Year one	13,765		13,765		18,929
Current period gross writeoffs, 2023			47
Year two	17,192		17,192		11,631
Current period gross writeoffs, 2022			370
Year three	10,010		10,010		5,055
Current period gross writeoffs, 2021			131
Year four	4,459		4,459		2,078
Current period gross writeoffs, 2020			128
Year five	1,960		1,960		835
Current period gross writeoffs, 2019			66
More than five years	1,619		1,619		1,450
Current period gross writeoffs, prior			243
Revolving Loans	6,444		6,444		3,725
Current period gross writeoffs, revolving			33
Loans held for investment	55,449		55,449		43,703
Loans charged-off	681	$ 168	1,018	$ 337
Pass
Financing Receivable, Recorded Investment [Line Items]
Year one	279,394		279,394		1,109,434
Year two	1,342,148		1,342,148		815,808
Year three	958,706		958,706		501,913
Year four	597,128		597,128		333,034
Year five	388,061		388,061		236,470
More than five years	878,697		878,697		551,591
Revolving Loans	433,691		433,691		117,949
Loans held for investment	4,877,825		4,877,825		3,666,199
Pass | Commercial, financial and agriculture
Financing Receivable, Recorded Investment [Line Items]
Year one	63,198		63,198		181,761
Year two	153,935		153,935		141,174
Year three	119,982		119,982		55,690
Year four	55,578		55,578		53,954
Year five	42,981		42,981		43,441
More than five years	74,566		74,566		52,038
Revolving Loans	274,501		274,501		181
Loans held for investment	784,741		784,741		528,239
Pass | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	115,044		115,044		582,895
Year two	801,165		801,165		436,661
Year three	591,882		591,882		305,140
Year four	397,524		397,524		217,626
Year five	278,946		278,946		140,682
More than five years	619,859		619,859		368,185
Revolving Loans	3,546		3,546		1,765
Loans held for investment	2,807,966		2,807,966		2,052,954
Pass | Consumer real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	87,387		87,387		325,853
Year two	369,865		369,865		226,355
Year three	236,851		236,851		136,052
Year four	139,610		139,610		59,376
Year five	64,194		64,194		51,515
More than five years	182,654		182,654		129,923
Revolving Loans	149,200		149,200		112,278
Loans held for investment	1,229,761		1,229,761		1,041,352
Pass | Consumer installment
Financing Receivable, Recorded Investment [Line Items]
Year one	13,765		13,765		18,925
Year two	17,183		17,183		11,618
Year three	9,991		9,991		5,031
Year four	4,416		4,416		2,078
Year five	1,940		1,940		832
More than five years	1,618		1,618		1,445
Revolving Loans	6,444		6,444		3,725
Loans held for investment	55,357		55,357		43,654
Special mention
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		1,052
Year two	757		757		6,533
Year three	10,427		10,427		5,602
Year four	3,443		3,443		11,643
Year five	11,723		11,723		10,708
More than five years	24,416		24,416		20,870
Revolving Loans	2,154		2,154		0
Loans held for investment	52,920		52,920		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	179		179		0
Year five	1,199		1,199		0
More than five years	1,473		1,473		412
Revolving Loans	127		127		0
Loans held for investment	2,978		2,978		7,644
Special mention | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		672
Year two	681		681		1,345
Year three	10,427		10,427		3,938
Year four	3,263		3,263		11,643
Year five	10,434		10,434		9,885
More than five years	18,817		18,817		16,612
Revolving Loans	0		0		0
Loans held for investment	43,622		43,622		44,095
Special mention | Consumer real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		0
Year two	76		76		0
Year three	0		0		0
Year four	0		0		0
Year five	90		90		823
More than five years	4,126		4,126		3,846
Revolving Loans	2,027		2,027		0
Loans held for investment	6,319		6,319		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	1		1		0
Year five	0		0		0
More than five years	0		0		0
Revolving Loans	0		0		0
Loans held for investment	1		1		0
Substandard
Financing Receivable, Recorded Investment [Line Items]
Year one	58		58		623
Year two	7,536		7,536		3,397
Year three	4,098		4,098		2,413
Year four	2,844		2,844		2,376
Year five	6,755		6,755		6,539
More than five years	57,607		57,607		35,026
Revolving Loans	1,282		1,282		1,176
Loans held for investment	80,180		80,180		51,550
Substandard | Commercial, financial and agriculture
Financing Receivable, Recorded Investment [Line Items]
Year one	58		58		50
Year two	427		427		0
Year three	163		163		0
Year four	317		317		34
Year five	638		638		33
More than five years	948		948		192
Revolving Loans	25		25		0
Loans held for investment	2,576		2,576		309
Substandard | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		50
Year two	6,981		6,981		2,830
Year three	3,389		3,389		908
Year four	838		838		1,694
Year five	5,334		5,334		4,797
More than five years	47,756		47,756		27,935
Revolving Loans	0		0		0
Loans held for investment	64,298		64,298		38,214
Substandard | Consumer real estate
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		519
Year two	119		119		554
Year three	527		527		1,481
Year four	1,647		1,647		648
Year five	763		763		1,706
More than five years	8,902		8,902		6,894
Revolving Loans	1,257		1,257		1,176
Loans held for investment	13,215		13,215		12,978
Substandard | Consumer installment
Financing Receivable, Recorded Investment [Line Items]
Year one	0		0		4
Year two	9		9		13
Year three	19		19		24
Year four	42		42		0
Year five	20		20		3
More than five years	1		1		5
Revolving Loans	0		0		0
Loans held for investment	91		91		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