v3.26.1
Fair Value Measurements (Carrying Value and Fair Value of Financial Instruments) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Assets:    
Non-marketable equity securities $ 144,652 $ 140,684
Liabilities:    
Time deposits 2,368,781 3,888,684
Federal funds purchased 265,000 0
Carrying Value    
Assets:    
Cash and cash equivalents 367,873 217,784
Investment securities 9,317,614 9,263,651
Non-marketable equity securities 144,652 140,684
Loans, net 23,711,557 24,053,882
Derivative assets $ 62,172 $ 85,156
Derivative assets, location Other assets Other assets
Liabilities:    
Demand, savings and money market deposits $ 26,512,467 $ 25,464,221
Time deposits 2,368,781 3,888,684
Federal funds purchased 265,000 0
FHLB advances 1,630,000 1,555,000
Notes and other borrowings 318,936 319,740
Derivative liabilities $ 77,917 $ 79,816
Derivative liabilities, location Other liabilities Other liabilities
Fair Value, Inputs, Level 1    
Assets:    
Cash and cash equivalents $ 367,873 $ 217,784
Investment securities 9,317,614 9,263,651
Fair Value, Inputs, Level 2    
Assets:    
Investment securities 9,317,614 9,263,651
Non-marketable equity securities 144,652 140,684
Derivative assets $ 62,172 $ 85,156
Derivative assets, location Other assets Other assets
Liabilities:    
Demand, savings and money market deposits $ 26,512,467 $ 25,464,221
Time deposits 2,361,568 3,887,392
Federal funds purchased 265,000 0
FHLB advances 1,629,994 1,555,021
Notes and other borrowings 313,143 318,456
Derivative liabilities $ 77,917 $ 79,816
Derivative liabilities, location Other liabilities Other liabilities
Fair Value, Inputs, Level 3    
Assets:    
Loans, net $ 23,394,467 $ 23,707,267