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Related Party Transactions (Related Party Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Mar. 31, 2023
Related Party Transaction [Line Items]    
Related party assets $ 48,766 $ 48,308
Blackwater [Member]    
Related Party Transaction [Line Items]    
Related party assets 41,674 42,141
Mercury [Member]    
Related Party Transaction [Line Items]    
Related party assets 13,711 8,402
Insurance Group [Member]    
Related Party Transaction [Line Items]    
Related party assets $ 6,619 $ (2,235)