v3.26.3
DERIVATIVES - Additional Information (Details)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
entity
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
entity
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
entity
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Derivative [Line Items]                
Derivative, Notional Amount $ 26,319,524   $ 26,319,524   $ 22,586,161      
Number of counterparties | entity 5   5   7      
Derivative liabilities $ 395,233   $ 395,233   $ 393,652      
Derivative Liability, Fair Value of Collateral, net of restricted cash 68,400   68,400   21,600      
Derivative Liability, Fair Value of Collateral 76,900   76,900   300      
Restricted Cash 8,500   8,500   10,200      
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax (671) $ 210 (671) $ 210 94 $ (301) $ 818 $ (1,176)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net 700   700          
Client derivative fees 2,511 $ 1,876 7,964 $ 5,121        
Other Receivables 37,000   37,000   37,000     $ 45,000
Increase (Decrease) in Other Receivables         8,000      
Derivative Asset, Fair Value of Collateral $ 0   $ 0   $ 11,700      
Foreign Exchange                
Derivative [Line Items]                
Number of counterparties | entity 5   5   4      
Foreign Exchange | Derivative Financial Instruments Receive Variable Pay Fixed                
Derivative [Line Items]                
Derivative, Notional Amount $ 9,903,335   $ 9,903,335          
Credit Risk Contract [Member]                
Derivative [Line Items]                
Derivative, Notional Amount 255,200   255,200   $ 223,500      
Interest Rate Lock Commitments [Member]                
Derivative [Line Items]                
Derivative, Notional Amount 58,600   58,600   37,500      
Other Credit Derivatives [Member]                
Derivative [Line Items]                
Derivative, Notional Amount 46,000   46,000   39,300      
Credit Risk Derivative Liabilities, at Fair Value 800   800   (700)      
Other Contract-Mortgage                
Derivative [Line Items]                
Derivative, Notional Amount $ 96,100   $ 96,100   $ 111,500      
Commodity                
Derivative [Line Items]                
Number of counterparties | entity 7   7   6      
Commodity | Derivative Financial Instruments Receive Variable Pay Fixed                
Derivative [Line Items]                
Derivative, Notional Amount $ 108,592   $ 108,592          
Derivative                
Derivative [Line Items]                
Derivative, Notional Amount 2,700,000   2,700,000   $ 2,400,000      
Derivative liabilities 90,000   90,000   24,700      
Derivative | Foreign Exchange                
Derivative [Line Items]                
Derivative, Notional Amount 9,900,000   9,900,000   8,300,000      
Derivative liabilities 21,500   21,500   1,100      
Derivative | Commodity                
Derivative [Line Items]                
Derivative liabilities $ 4,800   $ 4,800   $ 400