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Goodwill and Other Intangible Assets - Summary of Amortizable Intangible Assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]    
Balance of intangible assets, Gross CDI Carrying Amount, Beginning of period $ 97,211 $ 93,297
Additions due to acquisitions   3,914
Balance of intangible assets, Gross CDI Carrying Amount, End of period 97,211 97,211
Balance of intangible assets, Accumulated Amortization, Beginning of period (75,470) (67,903)
Amortization (6,451) (7,567)
Balance of intangible assets, Accumulated Amortization, End of period (81,921) (75,470)
Balance of intangible assets, Net CDI Amount, Beginning of period 21,742 25,394
Amortization (6,451) (3,652)
Balance of intangible assets, Net CDI Amount, End of period 15,291 21,742
Estimated Amortization Expense:    
2024 5,324  
2025 4,193  
2026 2,822  
2027 1,397  
2028 547  
Thereafter 1,008  
Total 15,291 21,742
FiniteLived Intangible Assets Amortization $ (6,451) $ (7,567)