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Investments (Company's Sale of AFS Investments) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]      
Proceeds from sales $ 126,766 $ 36,280 $ 0
Gross realized gains 0 13 0
Gross realized losses $ 10,310 $ (925) $ 0