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BUSINESS COMBINATIONS (Details) - USD ($) $ in Millions	Oct. 27, 2025	Oct. 20, 2025	Sep. 30, 2025	Dec. 31, 2024
Business Combination [Line Items]
Assets			$ 210,228	$ 204,230
Loans and leases			137,956	130,042
Deposits			165,212	$ 162,448
Veritex Holdings, Inc.
Business Combination [Line Items]
Assets			12,800
Loans and leases			9,600
Deposits			10,800
Cadence Bank
Business Combination [Line Items]
Assets			53,000
Loans and leases			37,000
Deposits			$ 44,000
Cadence Bank | Subsequent Event | Series A Non-Cumulative Perpetual Preferred Stock
Business Combination [Line Items]
Dividend Rate	5.50%
Veritex Holdings, Inc. | Subsequent Event
Business Combination [Line Items]
Share issuance ratio		1.95
Consideration transferred		$ 1,700
Veritex Holdings, Inc. | Subsequent Event | Veritex Shareholders Common Stock
Business Combination [Line Items]
Common stock issued (in shares)		107,000,000
Veritex Holdings, Inc. | Subsequent Event | Conversion of Certain Veritex Equity Awards
Business Combination [Line Items]
Shares issued		1,000,000
Cadence Bank | Subsequent Event | Common Stock
Business Combination [Line Items]
Share issuance ratio	2.475
Cadence Bank | Subsequent Event | Series A Non-Cumulative Perpetual Preferred Stock
Business Combination [Line Items]
Share issuance ratio	0.001

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