BUSINESS COMBINATIONS - Narrative (Details) $ / shares in Thousands, $ in Thousands		3 Months Ended
	Mar. 01, 2025 USD ($) $ / shares shares	Mar. 31, 2026 USD ($) state	Dec. 31, 2025 USD ($)
Business Combination, Contingent Consideration [Line Items]
Number of states in which entity operates | state		10
Preferred stock redemption price per share (in dollars per share) | $ / shares	$ 1
Fair value adjustments		$ 900
Goodwill		$ 382,363	$ 383,280
CrossFirst
Business Combination, Contingent Consideration [Line Items]
Goodwill	$ 48,593
Fair value of financial assets acquired	4,700,000
Gross contractual amounts of acquired receivables	4,790,000
CrossFirst | Replacement awards
Business Combination, Contingent Consideration [Line Items]
Common stock, preferred stock and replacement awards	$ 5,999
SSARs | CrossFirst | Common Stock | CrossFirst
Business Combination, Contingent Consideration [Line Items]
Shares received for each share owned (in shares) | shares	0.6675