LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Activity in the Allowance for Loan Losses, by Portfolio Segment, for the Current Year (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 235,019
Provision for credit loss expense	69,038	$ 46,785	$ 47,424
Balance, end of period	224,377	235,019
Loans, Excluding Acquired Loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	235,019	225,231	196,955
Provision for credit loss expense	69,038	46,785	47,424
Charge-offs	(84,662)	(42,564)	(26,172)
Recoveries	4,982	5,567	7,024
Net charge-offs	(79,680)	(36,997)	(19,148)
Balance, end of period	224,377	235,019	225,231
Loans, Excluding Acquired Loans | Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	41,587	36,470	34,406
Provision for credit loss expense	26,633	30,389	5,934
Charge-offs	(42,583)	(26,867)	(5,962)
Recoveries	2,361	1,595	2,092
Net charge-offs	(40,222)	(25,272)	(3,870)
Balance, end of period	27,998	41,587	36,470
Loans, Excluding Acquired Loans | Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	181,962	177,177	150,795
Provision for credit loss expense	34,384	10,249	36,381
Charge-offs	(33,075)	(6,949)	(12,385)
Recoveries	406	1,485	2,386
Net charge-offs	(32,669)	(5,464)	(9,999)
Balance, end of period	183,677	181,962	177,177
Loans, Excluding Acquired Loans | Consumer: | Credit Card
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	6,007	5,868	5,140
Provision for credit loss expense	5,205	5,485	5,023
Charge-offs	(6,370)	(6,437)	(5,303)
Recoveries	1,149	1,091	1,008
Net charge-offs	(5,221)	(5,346)	(4,295)
Balance, end of period	5,991	6,007	5,868
Loans, Excluding Acquired Loans | Consumer: | Other Consumer and Other
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	5,463	5,716	6,614
Provision for credit loss expense	2,816	662	86
Charge-offs	(2,634)	(2,311)	(2,522)
Recoveries	1,066	1,396	1,538
Net charge-offs	(1,568)	(915)	(984)
Balance, end of period	$ 6,711	$ 5,463	$ 5,716