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Contractual Obligations and Off-Balance Sheet Items - Additional Information (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
USD ($)
SubleaseArrangement
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
Contractual Obligations And Off Balance Sheet Items [Line Items]      
Operating lease right of use asset $ 36,800    
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other assets    
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Other liabilities    
Number of sublease arrangement | SubleaseArrangement 1    
Sublease income $ 869 $ 806  
Operating lease, weighted average remaining lease term 5 years 8 months 12 days    
Operating lease, weighted average discount rate, percent 2.90%    
Operating lease, payments $ 2,900 $ 2,800  
Right-of-Use asset obtained in exchange for operating lease liability 2,100    
Allowance for credit losses on off-balance sheet credit exposures 36,503   $ 36,503
Bank Term Funding Program [Member]      
Contractual Obligations And Off Balance Sheet Items [Line Items]      
Interest payable $ 186,100    
Minimum [Member]      
Contractual Obligations And Off Balance Sheet Items [Line Items]      
Lessee operating lease remaining lease term 1 year    
Maximum [Member]      
Contractual Obligations And Off Balance Sheet Items [Line Items]      
Lessee operating lease remaining lease term 15 years