GOODWILL AND INTANGIBLE ASSETS (Schedule of Goodwill and Intangible Assets by Operating Segment) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Apr. 01, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 1,207,484		$ 925,211
Intangible Assets	95,980		19,183
American National
Finite-Lived Intangible Assets [Line Items]
Goodwill	282,273	$ 282,273	0
Wholesale Banking
Finite-Lived Intangible Assets [Line Items]
Goodwill	845,239		639,180
Intangible Assets	9,349		1,302
Wholesale Banking | American National
Finite-Lived Intangible Assets [Line Items]
Goodwill	206,100	206,100
Intangible Assets	8,400
Consumer Banking
Finite-Lived Intangible Assets [Line Items]
Goodwill	362,245		286,031
Intangible Assets	883		989
Consumer Banking | American National
Finite-Lived Intangible Assets [Line Items]
Goodwill	76,200	$ 76,200
Corporate Other
Finite-Lived Intangible Assets [Line Items]
Goodwill	0		0
Intangible Assets	85,748		$ 16,892
Corporate Other | American National
Finite-Lived Intangible Assets [Line Items]
Intangible Assets	$ 76,300