BUSINESS COMBINATIONS - Schedule of Pre-tax Acquisition Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Business Combination [Line Items]
Pre-tax acquisition expenses	$ 5,244	$ 71,598
CrossFirst
Business Combination [Line Items]
Pre-tax acquisition expenses	5,244	71,490
M&M
Business Combination [Line Items]
Pre-tax acquisition expenses	$ 0	$ 108