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Income Taxes - Summary of Differences in Taxes from Continuing Operations Computed at Statutory Rate (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Income Tax Disclosure [Abstract] |  |  |
Provision at statutory rate of 21% | $ 142,892 | $ 157,774 | $ 114,394
Tax-exempt income: |  |  |
Tax-exempt interest | (19,439) | (18,582) | (14,588)
Section 291/265 interest disallowance | 3,620 | 2,392 | 363
Company-owned life insurance income | (4,428) | (3,125) | (2,891)
Tax-exempt income | (20,247) | (19,315) | (17,116)
State income taxes | 19,619 | 31,164 | 20,837
Tax credit investments - federal | (14,829) | (12,190) | (9,140)
Officer compensation limitation | 4,154 | 4,685 | 5,903
Non-deductible FDIC premiums | 8,754 | 7,912 | 3,805
Other, net | 907 | (720) | (2,237)
Income tax expense | $ 141,250 | $ 169,310 | $ 116,446
Effective tax rate | 20.80% | 22.50% | 21.40%

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