SECURITIES (Securities available for sale debt maturities) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Amortized Cost
Due in 1 year or less	$ 13,642
Due in 1 to 5 years	57,666
Due in 5 to 10 years	28,145
Due after 10 years	885,421
Total debt securities	984,874
Mortgage and asset-backed securities	3,630,365
Equity securities with a readily determinable fair value	21,586
Total investment securities	4,636,825
Estimated Fair Value
Due in 1 year or less	13,509
Due in 1 to 5 years	56,991
Due in 5 to 10 years	24,841
Due after 10 years	777,877
Estimated Fair Value	873,218
Mortgage and asset-backed securities	3,290,250
Equity securities with a readily determinable fair value	21,586	$ 21,056
Total investment securities	$ 4,185,054