OTHER BORROWINGS - Schedule of Other Borrowings (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Other Borrowings [Line Items]
Subordinated deferrable interest debentures	$ 130,814	$ 130,315
Other borrowings	631,380	509,586
Fixed Rate Advance due January 10, 2024; fixed interest rate of $5.450%
Other Borrowings [Line Items]
Advance from correspondent bank	$ 0	50,000
Debt instrument, interest rate, effective percentage	5.45%
Fixed Rate Advance due January 17, 2024; fixed interest rate of $5.460%
Other Borrowings [Line Items]
Advance from correspondent bank	$ 0	100,000
Debt instrument, interest rate, effective percentage	5.46%
Fixed Rate Advance due April 15, 2024; fixed interest rate of 5.440%
Other Borrowings [Line Items]
Advance from correspondent bank	$ 50,000	0
Debt instrument, interest rate, effective percentage	5.44%
Fixed Rate Advance due April 19, 2024; fixed interest rate of 5.470%
Other Borrowings [Line Items]
Advance from correspondent bank	$ 25,000	0
Debt instrument, interest rate, effective percentage	5.47%
Daily Rate Credit due December 11, 2024, variable interest rate of $5.580%
Other Borrowings [Line Items]
Advance from correspondent bank	$ 200,000	0
Basis spread on variable rate	5.58%
Fixed Rate Advance due March 3, 2025; fixed interest rate of $1.208%
Other Borrowings [Line Items]
Advance from correspondent bank	$ 15,000	15,000
Debt instrument, interest rate, effective percentage	1.208%
Fixed Rate Advance due March 2, 2027; fixed interest rate of $1.445%
Other Borrowings [Line Items]
Advance from correspondent bank	$ 15,000	15,000
Debt instrument, interest rate, effective percentage	1.445%
Fixed Rate Advance due March 4, 2030; fixed interest rate of $1.606%
Other Borrowings [Line Items]
Advance from correspondent bank	$ 15,000	15,000
Debt instrument, interest rate, effective percentage	1.606%
Fixed Rate Advance due December 9, 2030; fixed interest rate of $4.550%
Other Borrowings [Line Items]
Advance from correspondent bank	$ 1,375	1,378
Debt instrument, interest rate, effective percentage	4.55%
Fixed Rate Advance due December 9, 2030; fixed interest rate of $4.550%
Other Borrowings [Line Items]
Advance from correspondent bank	$ 952	954
Debt instrument, interest rate, effective percentage	4.55%
Principal Reducing Advance due September 29, 2031; fixed interest rate of $3.095%
Other Borrowings [Line Items]
Advance from correspondent bank	$ 1,092	1,128
Debt instrument, interest rate, effective percentage	3.095%
Subordinated notes payable due December 15, 2029 net of unamortized debt issuance cost of $1,220 and $1,296, respectively; fixed interest rate of 4.25% through December 14, 2024; variable interest rate thereafter at three-month SOFR plus 2.94%
Other Borrowings [Line Items]
Subordinated deferrable interest debentures	$ 104,530	106,704
Debt instrument, interest rate, effective percentage	4.25%
Unamortized debt issuance expense	$ 1,220	1,296
Subordinated notes payable due December 15, 2029 net of unamortized debt issuance cost of $1,220 and $1,296, respectively; fixed interest rate of 4.25% through December 14, 2024; variable interest rate thereafter at three-month SOFR plus 2.94% | Secured Overnight Financing Rate (SOFR)
Other Borrowings [Line Items]
Basis spread on variable rate	2.94%
Subordinated notes payable due May 31, 2030 net of unaccreted purchase accounting fair value adjustment of $743 and $784, respectively; fixed interest rate of 5.875% through May 31, 2025; variable interest rate thereafter at three-month LIBOR plus 3.63%
Other Borrowings [Line Items]
Subordinated deferrable interest debentures	$ 74,743	75,784
Debt instrument, interest rate, effective percentage	5.875%
Unaccreted purchase accounting fair value adjustment	$ 743	784
Subordinated notes payable due May 31, 2030 net of unaccreted purchase accounting fair value adjustment of $743 and $784, respectively; fixed interest rate of 5.875% through May 31, 2025; variable interest rate thereafter at three-month LIBOR plus 3.63% | London Interbank Offered Rate (LIBOR)
Other Borrowings [Line Items]
Basis spread on variable rate	3.63%
Subordinated notes payable due October 1, 2030 net of unamortized debt issuance cost of $1,312 and $1,362, respectively; fixed interest rate of 3.875% through September 30, 2025; variable interest rate thereafter at three-month SOFR plus 3.753%
Other Borrowings [Line Items]
Subordinated deferrable interest debentures	$ 108,688	108,638
Debt instrument, interest rate, effective percentage	3.875%
Unamortized debt issuance expense	$ 1,312	1,362
Subordinated notes payable due October 1, 2030 net of unamortized debt issuance cost of $1,312 and $1,362, respectively; fixed interest rate of 3.875% through September 30, 2025; variable interest rate thereafter at three-month SOFR plus 3.753% | Secured Overnight Financing Rate (SOFR)
Other Borrowings [Line Items]
Basis spread on variable rate	3.753%
Advance from correspondent bank due November 28, 2024; secured by a loan receivable; variable interest rate at one-month SOFR plus 2.50%
Other Borrowings [Line Items]
Other borrowings	$ 10,000	10,000
Advance from correspondent bank due November 28, 2024; secured by a loan receivable; variable interest rate at one-month SOFR plus 2.50% | Secured Overnight Financing Rate (SOFR)
Other Borrowings [Line Items]
Basis spread on variable rate	2.50%
Advance from correspondent bank due December 1, 2025; secured by a loan receivable; variable interest rate at one-month SOFR plus 2.65%
Other Borrowings [Line Items]
Other borrowings	$ 10,000	$ 10,000
Advance from correspondent bank due December 1, 2025; secured by a loan receivable; variable interest rate at one-month SOFR plus 2.65% | Secured Overnight Financing Rate (SOFR)
Other Borrowings [Line Items]
Basis spread on variable rate	2.65%