COMMITMENTS AND CONTINGENCIES - Schedule of Guarantor Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments to extend credit	$ 3,816,556	$ 4,412,818
Unused home equity lines of credit	414,894	386,574
Financial standby letters of credit	39,194	37,546
Mortgage interest rate lock commitments	$ 321,262	$ 171,750