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Commitments and Contingencies - Additional Information (Details)
£ in Thousands
3 Months Ended
Mar. 17, 2025
USD ($)
Oct. 25, 2024
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2024
USD ($)
Oct. 27, 2024
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2023
GBP (£)
Other Commitments [Line Items]                
Unfunded Commitments for Capital Contributions     $ 2,552,000          
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount     3,585,000   $ 3,268,000      
Foreign Exchange Forward [Member]                
Other Commitments [Line Items]                
Derivative asset notional amount             $ 36,675,000 £ 30,000
Derivative, Loss on Derivative       $ 347,000        
Secured Line of Credit [Member] | PNC Bank [Member]                
Other Commitments [Line Items]                
Maximum Borrowing Capacity           $ 30,000,000    
Unsecured Line of Credit [Member] | PNC Bank [Member]                
Other Commitments [Line Items]                
Maximum Borrowing Capacity $ 85,000,000         $ 55,000,000    
Debt Instrument, Basis Spread on Variable Rate 1.55%              
Short-Term Borrowings     0          
Unsecured Line of Credit [Member] | PNC Bank [Member] | EGL [Member]                
Other Commitments [Line Items]                
Maximum Borrowing Capacity   $ 75,000,000            
Debt Instrument, Basis Spread on Variable Rate   1.45%            
Short-Term Borrowings     $ 0