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Other Borrowings - Narrative (Details) - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 25,000,000  
Outstanding advances 0 $ 0
Established borrowing capacity with the FHLB 1,600,000,000 1,600,000,000
Unused borrowing capacity with the FHLB 600,000,000 1,300,000,000
Overnight advances with the FHLB 477,100,000 241,300,000
Term advances with the FHLB $ 125,000,000 $ 50,000,000
Weighted average rate with the FHLB 5.15% 4.12%
Term advances mature within one year $ 40,000,000  
Term advances mature in over one year 85,000,000  
Term advances mature in 2025 40,000,000  
Callable FHLB borrowings 0  
Outstanding on line of credit with bank 0 $ 0
Subsidiaries    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 99,000,000 $ 99,000,000