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v3.25.3

Fair Value - Summary of Carrying and Fair Value Information of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Assets |  |
Cash and due from banks | $ 1,766,115 | $ 1,972,175
Federal funds sold | 210 | 292
Held to maturity securities | 8,981,672 | 9,382,479
Loans held for sale | 11,297 | 10,690
Loans held for investment | 20,738,294 | 21,057,616
Other real estate owned | 13,750 | 5,701
Liabilities |  |
Noninterest-bearing | 9,522,028 | 9,798,438
Interest-bearing | 18,260,066 | 18,582,900
Other borrowings | 2,400,000 | 3,200,000
Securities sold under repurchase agreements | 185,797 | 221,913
Carrying Amount [Member] |  |
Assets |  |
Cash and due from banks | 1,766,115 | 1,972,175
Federal funds sold | 210 | 292
Held to maturity securities | 9,900,093 | 10,757,464
Loans held for sale | 11,297 | 10,690
Loans held for investment, net of allowance | 20,398,668 | 20,705,811
Loans held for investment | 1,278,178 | 1,080,903
Other real estate owned | 13,750 | 5,701
Liabilities |  |
Noninterest-bearing | 9,522,028 | 9,798,438
Interest-bearing | 18,260,066 | 18,582,900
Other borrowings | 2,400,000 | 3,200,000
Securities sold under repurchase agreements | 185,797 | 221,913
Estimated Fair Value [Member] |  |
Assets |  |
Cash and due from banks | 1,766,115 | 1,972,175
Federal funds sold | 210 | 292
Held to maturity securities | 8,981,672 | 9,382,479
Loans held for sale | 11,297 | 10,690
Loans held for investment, net of allowance | 19,388,969 | 19,379,556
Loans held for investment | 1,278,178 | 1,080,903
Other real estate owned | 13,750 | 5,701
Liabilities |  |
Noninterest-bearing | 9,522,028 | 9,798,438
Interest-bearing | 18,243,056 | 18,559,227
Other borrowings | 2,400,000 | 3,200,000
Securities sold under repurchase agreements | 185,796 | 221,902
Estimated Fair Value [Member] | Level 1 [Member] |  |
Assets |  |
Cash and due from banks | 1,766,115 | 1,972,175
Federal funds sold | 210 | 292
Estimated Fair Value [Member] | Level 2 [Member] |  |
Assets |  |
Held to maturity securities | 8,981,672 | 9,382,479
Loans held for sale | 11,297 | 10,690
Loans held for investment | 1,278,178 | 1,080,903
Other real estate owned | 13,750 | 5,701
Liabilities |  |
Noninterest-bearing | 9,522,028 | 9,798,438
Interest-bearing | 18,243,056 | 18,559,227
Other borrowings | 2,400,000 | 3,200,000
Securities sold under repurchase agreements | 185,796 | 221,902
Estimated Fair Value [Member] | Level 3 [Member] |  |
Assets |  |
Loans held for investment, net of allowance | $ 19,388,969 | $ 19,379,556

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