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Loans and Allowance for Credit Losses - Loans - Troubled Debt Restructurings (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Financing Receivable, Modifications [Line Items]      
Financing receivable, excluding accrued interest, modified period $ 92 $ 231  
% of Total Class of Financing Receivable 0.01%   0.04%
Interest Only      
Financing Receivable, Modifications [Line Items]      
Financing receivable, excluding accrued interest, modified period $ 0 51  
Term Extension      
Financing Receivable, Modifications [Line Items]      
Financing receivable, excluding accrued interest, modified period 0 0  
Combination: Interest Only and Term Extension      
Financing Receivable, Modifications [Line Items]      
Financing receivable, excluding accrued interest, modified period 92 $ 180  
Residential mortgage      
Financing Receivable, Modifications [Line Items]      
Financing receivable, excluding accrued interest, modified period $ 92    
% of Total Class of Financing Receivable 0.01%    
Residential mortgage | Interest Only      
Financing Receivable, Modifications [Line Items]      
Financing receivable, excluding accrued interest, modified period $ 0    
Residential mortgage | Term Extension      
Financing Receivable, Modifications [Line Items]      
Financing receivable, excluding accrued interest, modified period 0    
Residential mortgage | Combination: Interest Only and Term Extension      
Financing Receivable, Modifications [Line Items]      
Financing receivable, excluding accrued interest, modified period $ 92    
Commercial real estate      
Financing Receivable, Modifications [Line Items]      
Financing receivable, excluding accrued interest, modified period     $ 231
% of Total Class of Financing Receivable     0.04%
Commercial real estate | Interest Only      
Financing Receivable, Modifications [Line Items]      
Financing receivable, excluding accrued interest, modified period     $ 51
Commercial real estate | Term Extension      
Financing Receivable, Modifications [Line Items]      
Financing receivable, excluding accrued interest, modified period     0
Commercial real estate | Combination: Interest Only and Term Extension      
Financing Receivable, Modifications [Line Items]      
Financing receivable, excluding accrued interest, modified period     $ 180