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Loans (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2022
Loans                
Accrued interest receivable on loans $ 44,700   $ 44,700   $ 45,000      
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Interest and dividends receivable   Interest and dividends receivable   Interest and dividends receivable      
Allowance for credit losses - loans $ 41,648 $ 38,593 $ 41,648 $ 38,593 $ 40,161 $ 40,752 $ 38,729 $ 40,442
Provision for credit losses $ 800 $ 1,400 $ 1,400 $ 8,900        
Percentage of financing receivable non-performing loans     120.60%   159.60%      
Percentage of financing receivable on total loans     0.61%   0.58%