v3.24.2
Fair Value Disclosures - Schedule of Assets and Liabilities Measured At Fair Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities $ 3,483,231 $ 3,225,892
Equity securities 74,232 51,825
Derivative assets 11,292 32,944
Derivative liabilities 72,160 70,917
U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 388,158 636,473
U.S. government agency securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 106,209 106,592
CRT securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 12,328 11,995
Fair value measurements, recurring basis | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity securities 58,197 40,661
Mortgage loans held for sale 0 0
Loans held for investment 0 0
Derivative assets 0 0
Securities sold not yet purchased 33,359 10,602
Derivative liabilities 0 0
Non-qualified deferred compensation plan liabilities 20,602 20,387
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 388,158 636,473
Fair value measurements, recurring basis | Level 1 | U.S. government agency 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 | 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 | 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 16,035 11,164
Mortgage loans held for sale 424 706
Loans held for investment 0 0
Derivative assets 11,292 32,944
Securities sold not yet purchased 0 0
Derivative liabilities 72,160 70,917
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 0
Fair value measurements, recurring basis | Level 2 | U.S. government agency securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities 106,209 106,592
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 2,976,536 2,470,832
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
Mortgage loans held for sale 0 0
Loans held for investment 18,007 38,341
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 0
Fair value measurements, recurring basis | Level 3 | U.S. government agency 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 | 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 | CRT securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-sale debt securities $ 12,328 $ 11,995