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Securities - Additional Information (Details)
 1 Months Ended 12 Months Ended
Dec. 31, 2021
USD ($)
security
Mar. 31, 2022
USD ($)
security
Dec. 31, 2023
USD ($)
security
Dec. 31, 2022
USD ($)
security
Dec. 31, 2021
USD ($)
security
Investments, Debt and Equity Securities [Abstract]          
Number of securities | security 475 793     475
Aggregate fair value of securities $ 490,200,000 $ 120,900,000     $ 490,200,000
Unrealized gains (losses) on securities $ 5,900,000 $ (814,000) $ 41,150,000 $ (118,006,000) (24,117,000)
Number of securities in unrealized loss positions | security     2,290 2,828  
Unrealized loss positions     $ 2,100,000,000 $ 2,600,000,000  
Percentage of portfolio     85.00% 86.00%  
Allowance for credit losses for available for sale debt securities     $ 0 $ 0  
Allowance for credit loss     157,000    
Accrued interest receivable on available for sale debt securities     14,700,000 17,800,000  
Tax effect of the proceeds from sale of securities     6,700,000 $ 0 $ 192,000
Pledged of fair value of securities as collateral     145,200,000    
Amortization cost of securities as collateral not separately reported     170,300,000    
Debt instrument repurchase agreement     136,000,000    
Securities pledged for federal home loan bank at fair value     1,400,000,000    
Securities for federal home loan bank not separately reported     1,700,000,000    
Debt instrument federal home loan bank     430,000,000    
Securities pledged for derivative at fair value     20,200,000    
Securities pledged for derivative at amortized cost     23,000,000    
Debt instrument derivative swap agreement     $ 26,600,000