BUSINESS COMBINATIONS - Cadence Acquisition (Details) $ / shares in Units, $ in Millions	Jan. 30, 2026 USD ($) $ / shares	Oct. 26, 2025 shares	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Business Combination [Line Items]
Total assets			$ 225,106	$ 204,230
Total Loans and Leases			149,642	130,042
Deposits			176,610	$ 162,448
Cadence Bank
Business Combination [Line Items]
Total assets			54,000
Total Loans and Leases			37,000
Deposits			$ 44,000
Series A Preferred Stock | Cadence Bank
Business Combination [Line Items]
Dividend Rate		5.50%
Preferred stock, convertible, conversion ratio		0.001
Series L Preferred Stock | Cadence Bank
Business Combination [Line Items]
Dividend Rate		5.50%
Cadence Bank
Business Combination [Line Items]
Business combination, voting equity interest acquired, percentage		100.00%
Cadence Bank | Subsequent Event
Business Combination [Line Items]
Share price (in dollars per share) | $ / shares	$ 17.48
Business combination, price of acquisition, expected	$ 8,100
Cadence Bank | Common Stock
Business Combination [Line Items]
Share issuance ratio | shares		2.475