INVESTMENT SECURITIES - Debt Maturities (Details) - Investment securities - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Amortized Cost
Due within one year	$ 463,931
Due after one year through five years	2,308,576
Due after five years through ten years	2,441,044
Due after ten years	891,565
Available-for-sale, amortized cost	6,105,116	$ 5,060,135
Fair Value
Due within one year	464,956
Due after one year through five years	2,288,524
Due after five years through ten years	2,319,007
Due after ten years	880,527
Total fair value	$ 5,953,014	$ 4,918,931
Weighted- Average Yield
Due within one year	3.90%
Due after one year through five years	4.09%
Due after five years through ten years	3.94%
Due after ten years	4.97%
Weighted-average yield	4.15%