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Leases - Additional Information (Detail)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
USD ($)
property
relatedParty
Sep. 30, 2024
USD ($)
property
relatedParty
Dec. 31, 2023
USD ($)
Leases [Abstract]      
Right of use asset $ 43,000 $ 43,000 $ 42,200
Lease liability $ 45,848 $ 45,848 $ 45,028
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Bank premises and equipment, net Bank premises and equipment, net Bank premises and equipment, net
Operating Lease, Liability, Statement of Financial Position [Extensible List] Accrued interest payable and other liabilities Accrued interest payable and other liabilities Accrued interest payable and other liabilities
Number of lease properties | property 2 2  
Number of related parties | relatedParty 2 2  
Lease rent expense $ 35 $ 97  
Lease expense rate 1.37% 1.25%