v3.24.2
Fair Value Disclosures - Summary of the Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Available-for-sale debt securities $ 3,483,231 $ 3,225,892
Held-to-maturity debt securities 831,513 865,477
Equity securities 74,232 51,825
Derivative assets 11,292 32,944
Long-term debt 659,997 859,147
Derivative liabilities 72,160 70,917
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 2,913,079 3,242,850
Available-for-sale debt securities 3,483,231 3,225,892
Held-to-maturity debt securities 831,513 865,477
Equity securities 74,232 51,825
Loans held for sale 36,785 44,105
Loans held for investment, net 21,511,433 20,090,585
Derivative assets 11,292 32,944
Total deposits 23,818,327 22,371,839
Short-term borrowings 1,675,000 1,500,000
Long-term debt 659,997 859,147
Securities sold not yet purchased 33,359 10,602
Derivative liabilities 72,160 70,917
Estimated Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 2,913,079 3,242,850
Available-for-sale debt securities 3,483,231 3,225,892
Held-to-maturity debt securities 718,910 763,844
Equity securities 74,232 51,825
Loans held for sale 36,785 44,105
Loans held for investment, net 21,466,288 20,050,974
Derivative assets 11,292 32,944
Total deposits 23,823,172 22,379,452
Short-term borrowings 1,675,000 1,500,000
Long-term debt 611,134 801,309
Securities sold not yet purchased 33,359 10,602
Derivative liabilities 72,160 70,917
Level 1 | Estimated Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 2,913,079 3,242,850
Available-for-sale debt securities 388,158 636,473
Held-to-maturity debt securities 0 0
Equity securities 58,197 40,661
Loans held for sale 0 15,000
Loans held for investment, net 0 0
Derivative assets 0 0
Total deposits 0 0
Short-term borrowings 0 0
Long-term debt 0 0
Securities sold not yet purchased 33,359 10,602
Derivative liabilities 0 0
Level 2 | Estimated Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Available-for-sale debt securities 3,082,745 2,577,424
Held-to-maturity debt securities 718,910 763,844
Equity securities 16,035 11,164
Loans held for sale 9,584 29,105
Loans held for investment, net 0 0
Derivative assets 11,292 32,944
Total deposits 0 0
Short-term borrowings 1,675,000 1,500,000
Long-term debt 611,134 801,309
Securities sold not yet purchased 0 0
Derivative liabilities 72,160 70,917
Level 3 | Estimated Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash and cash equivalents 0 0
Available-for-sale debt securities 12,328 11,995
Held-to-maturity debt securities 0 0
Equity securities 0 0
Loans held for sale 27,201 0
Loans held for investment, net 21,466,288 20,050,974
Derivative assets 0 0
Total deposits 23,823,172 22,379,452
Short-term borrowings 0 0
Long-term debt 0 0
Securities sold not yet purchased 0 0
Derivative liabilities $ 0 $ 0