DEPOSITS - Schedule of Composition of Deposits (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Deposits [Abstract]
Noninterest-bearing demand deposits	$ 3,590,363	$ 2,719,907
Interest-bearing transaction deposits	3,216,601	2,423,237
Saving deposits and money market deposits	6,362,352	3,348,711
Time deposits	2,632,456	1,490,635
Total deposits	15,801,772	9,982,490
Brokered savings deposits and money market deposits	133,986	6,002
Brokered time deposits	219,628	7,088
Aggregate amount of time deposits with a minimum denomination of $100,000	1,672,181	860,193
Aggregate amount of time deposits with a minimum denomination that meets or exceeds the FDIC insurance limit of $250,000	$ 827,762	$ 334,503