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Federal Home Loan Bank Advances and Other Borrowings (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Dec. 31, 2021
Loan and Security Agreement | Revolving Line of Credit      
Federal Home Loan Bank Advances and Other Borrowings      
Interest rate (as a percent) 8.50%    
Bank stock (as a percent)     100.00%
Total Debt Outstanding $ 13,750 $ 13,750  
Loan and Security Agreement | Minimum | Revolving Line of Credit      
Federal Home Loan Bank Advances and Other Borrowings      
Interest rate (as a percent) 3.85% 3.85%  
Federal Home Loan Bank Advances      
Federal Home Loan Bank Advances and Other Borrowings      
Principal balances $ 1,450,000 $ 1,450,000  
Remaining available borrowings $ 446,800 $ 498,700