v3.26.3
Fair Value Measurements (Carrying Value and Fair Value of Financial Instruments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Assets:    
Non-marketable equity securities $ 158,666 $ 140,684
Liabilities:    
Time deposits 3,042,882 3,888,684
Federal funds purchased 229,993 0
Carrying Value    
Assets:    
Cash and cash equivalents 425,180 217,784
Investment securities 8,905,357 9,263,651
Non-marketable equity securities 158,666 140,684
Loans, net 23,593,880 24,053,882
Derivative assets $ 145,848 $ 85,156
Derivative assets, location Other assets Other assets
Liabilities:    
Demand, savings and money market deposits $ 25,268,081 $ 25,464,221
Time deposits 3,042,882 3,888,684
Federal funds purchased 229,993 0
FHLB advances 1,925,000 1,555,000
Notes and other borrowings 318,532 319,740
Derivative liabilities $ 179,334 $ 79,816
Derivative liabilities, location Other liabilities Other liabilities
Fair Value, Inputs, Level 1    
Assets:    
Cash and cash equivalents $ 425,180 $ 217,784
Investment securities 8,905,357 9,263,651
Fair Value, Inputs, Level 2    
Assets:    
Investment securities 8,905,357 9,263,651
Non-marketable equity securities 158,666 140,684
Derivative assets $ 145,848 $ 85,156
Derivative assets, location Other assets Other assets
Liabilities:    
Demand, savings and money market deposits $ 25,268,081 $ 25,464,221
Time deposits 3,033,661 3,887,392
Federal funds purchased 229,991 0
FHLB advances 1,924,951 1,555,021
Notes and other borrowings 302,316 318,456
Derivative liabilities $ 179,334 $ 79,816
Derivative liabilities, location Other liabilities Other liabilities
Fair Value, Inputs, Level 3    
Assets:    
Loans, net $ 23,058,012 $ 23,707,267