COMMITMENTS AND CONTINGENCIES - Schedule of Guarantor Obligations (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments to extend credit	$ 3,484,890	$ 4,412,818
Unused home equity lines of credit	438,080	386,574
Financial standby letters of credit	41,926	37,546
Mortgage interest rate lock commitments	$ 379,396	$ 171,750