BORROWINGS - Summary of Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Disclosure [Abstract]
Securities sold under repurchase agreements	$ 130,264	$ 157,280
Federal Home Loan Bank advances	612,778	712,852
Subordinated debentures and other borrowings	118,612	158,644
Total Borrowings	$ 861,654	$ 1,028,776