GOODWILL AND OTHER INTANGIBLES - Summary of Core Deposit and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Finite-Lived Intangible Assets [Roll Forward]
Gross carrying amount	$ 13,800	$ 123,285
Accumulated amortization	(2,302)	(109,485)
Total core deposit and other intangibles	41,678	13,800
Other Intangible Assets
Finite-Lived Intangible Assets [Roll Forward]
Other intangibles acquired	$ 30,180	$ 0