BUSINESS COMBINATIONS - Schedule of Pre-tax Acquisition Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Business Combination [Line Items]
Pre-tax acquisition expenses	$ 100,308	$ 6,901
M&M
Business Combination [Line Items]
Pre-tax acquisition expenses	108	3,038
CrossFirst
Business Combination [Line Items]
Pre-tax acquisition expenses	100,200	$ 3,863
Adjustment to the initial provision for unfunded commitments	$ 4,000