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Fair Value of Financial Instruments - Narrative (Details) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Feb. 28, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Non-marketable equity securities held in other financial institutions       $ 55,190,000 $ 67,378,000  
Impairment recorded on investments in equity securities that do not have readily determinable fair values       0    
Change in fair value of equity investments       10,096,000 0 $ 19,000
Liability to repurchase past due GNMA loans $ 24,600,000     0 24,600,000  
Settlement of sale of GNMA MSR $ 1,800,000 $ 1,800,000 $ 1,800,000 1,806,000 0 $ 0
Loan balance individually evaluated       5,011,000 8,217,000  
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loan balance individually evaluated       19,700,000 20,700,000  
Foreclosed assets       3,900,000 806,000  
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Residential real estate | Real estate            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Residential mortgage loans in the process of foreclosure       $ 0 $ 10,000  
Minimum | Measurement Input, Credit Spread            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Credit spread, securities at fair value through income       0.83% 0.83%  
Maximum | Measurement Input, Credit Spread            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Credit spread, securities at fair value through income       2.27% 2.27%