LOANS - Schedule of Total Loans Outstanding (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 5,225,534	$ 5,120,635
Percentage of loans receivable	100.00%	100.00%
Less: Allowance for credit losses	$ (92,433)	$ (85,960)	$ (73,180)	$ (71,972)
Net deferred loan fees	(2,313)	(2,687)
Loans, net	5,130,788	5,031,988
Total commercial loans | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 4,623,085	$ 4,526,365
Percentage of loans receivable	88.50%	88.40%
Total consumer loans | Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 602,449	$ 594,270
Percentage of loans receivable	11.50%	11.60%
Other consumer loans | Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 102,254	$ 104,041
Percentage of loans receivable	1.90%	2.00%
Commercial and industrial loans: | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 1,523,570	$ 1,450,865
Percentage of loans receivable	29.20%	28.30%
Less: Allowance for credit losses	$ (52,302)	$ (45,539)	(30,720)	(30,338)
Commercial and industrial loans: | Working capital lines of credit loans | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 716,522	$ 649,609
Percentage of loans receivable	13.70%	12.70%
Commercial and industrial loans: | Non-working capital loans | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 807,048	$ 801,256
Percentage of loans receivable	15.50%	15.60%
Commercial real estate and multi-family residential loans: | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 2,620,817	$ 2,592,520
Percentage of loans receivable	50.20%	50.60%
Commercial real estate and multi-family residential loans: | Construction and land development loans | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 623,905	$ 567,781
Percentage of loans receivable	12.00%	11.10%
Commercial real estate and multi-family residential loans: | Owner occupied loans | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 804,933	$ 807,090
Percentage of loans receivable	15.40%	15.80%
Commercial real estate and multi-family residential loans: | Nonowner occupied loans | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 852,033	$ 872,671
Percentage of loans receivable	16.30%	17.00%
Commercial real estate and multi-family residential loans: | Multifamily loans | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 339,946	$ 344,978
Percentage of loans receivable	6.50%	6.70%
Agri-business and agricultural loans: | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 383,771	$ 387,396
Percentage of loans receivable	7.30%	7.60%
Less: Allowance for credit losses	$ (3,500)	$ (3,541)	$ (4,112)	$ (4,150)
Agri-business and agricultural loans: | Loans secured by farmland | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 156,112	$ 156,609
Percentage of loans receivable	3.00%	3.10%
Agri-business and agricultural loans: | Loans for agricultural production | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 227,659	$ 230,787
Percentage of loans receivable	4.30%	4.50%
Other commercial loans | Commercial Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 94,927	$ 95,584
Percentage of loans receivable	1.80%	1.90%
Consumer 1-4 family mortgage loans: | Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 500,195	$ 490,229
Percentage of loans receivable	9.60%	9.60%
Consumer 1-4 family mortgage loans: | Closed end first mortgage loans | Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 265,855	$ 259,286
Percentage of loans receivable	5.10%	5.10%
Consumer 1-4 family mortgage loans: | Open end and junior lien loans | Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 217,981	$ 214,125
Percentage of loans receivable	4.20%	4.20%
Consumer 1-4 family mortgage loans: | Residential construction and land development loans | Consumer Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable before allowance for credit loss	$ 16,359	$ 16,818
Percentage of loans receivable	0.30%	0.30%