v3.25.2
Fair Value Disclosures - Schedule of Assets and Liabilities Measured At Fair Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities $ 3,774,141 $ 3,524,686
Equity securities 68,692 75,261
Trading securities 3,888 0
Derivative assets 50,129 23,202
Derivative liabilities 40,217 57,906
U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities   277,285
Residential mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 3,519,520 3,034,043
Commercial mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 243,254 201,432
CRT securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 11,367 11,926
Fair value measurements, recurring basis | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity securities 52,561 59,235
Trading securities 0  
Loans held for investment 0 0
Derivative assets 0 0
Securities sold not yet purchased 26,551 33,705
Derivative liabilities 0 0
Non-qualified deferred compensation plan liabilities 19,533 19,109
Fair value measurements, recurring basis | Level 1 | U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities   277,285
Fair value measurements, recurring basis | Level 1 | Residential mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 0 0
Fair value measurements, recurring basis | Level 1 | Commercial mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 0 0
Fair value measurements, recurring basis | Level 1 | CRT securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 0 0
Fair value measurements, recurring basis | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity securities 16,131 16,026
Trading securities 3,888  
Loans held for investment 0 0
Derivative assets 50,129 23,202
Securities sold not yet purchased 0 0
Derivative liabilities 40,217 57,906
Non-qualified deferred compensation plan liabilities 0 0
Fair value measurements, recurring basis | Level 2 | U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities   0
Fair value measurements, recurring basis | Level 2 | Residential mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 3,519,520 3,034,043
Fair value measurements, recurring basis | Level 2 | Commercial mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 243,254 201,432
Fair value measurements, recurring basis | Level 2 | CRT securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 0 0
Fair value measurements, recurring basis | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity securities 0 0
Trading securities 0  
Loans held for investment 16,154 35,318
Derivative assets 0 0
Securities sold not yet purchased 0 0
Derivative liabilities 0 0
Non-qualified deferred compensation plan liabilities 0 0
Fair value measurements, recurring basis | Level 3 | U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities   0
Fair value measurements, recurring basis | Level 3 | Residential mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 0 0
Fair value measurements, recurring basis | Level 3 | Commercial mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 0 0
Fair value measurements, recurring basis | Level 3 | CRT securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities $ 11,367 $ 11,926