COMMITMENTS AND CONTINGENCIES - Schedule of Guarantor Obligations (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments to extend credit	$ 5,861,437	$ 4,328,749
Unused home equity lines of credit	327,974	272,029
Financial standby letters of credit	30,236	36,184
Mortgage interest rate lock commitments	$ 245,168	$ 417,126