GOODWILL AND INTANGIBLE ASSETS (Schedule of Information Concerning Intangible Assets with Finite Life) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Apr. 01, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Goodwill, Gross Carrying Value	$ 925,211		$ 925,211
Goodwill	1,212,710		925,211
Accumulated Amortization, Goodwill	0		0
Total estimated amortization expense	90,176
American National
Finite-Lived Intangible Assets [Line Items]
Goodwill	287,499	$ 287,499	0
Initial goodwill		$ 282,300
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	85,491		85,491
Accumulated Amortization	(80,828)		(68,599)
Total estimated amortization expense	79,073		16,892
Core Deposits [Member] | American National
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	74,410		0
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	3,977		3,977
Accumulated Amortization	(3,151)		(1,686)
Total estimated amortization expense	11,103		2,291
Other Intangible Assets [Member] | American National
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 10,277		$ 0