Commitments and Contingencies - Additional Information (Details) £ in Thousands			3 Months Ended	6 Months Ended
	Nov. 06, 2023 USD ($)	Jun. 29, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 GBP (£)	Mar. 31, 2023 USD ($)	Mar. 31, 2023 GBP (£)
Other Commitments [Line Items]
Unfunded Commitments for Capital Contributions				$ 2,584,000
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount				3,067,000	$ 3,165,000
Foreign Exchange Forward [Member]
Other Commitments [Line Items]
Derivative asset notional amount			$ 36,675,000			£ 30,000	$ 36,903,000	£ 30,000
Derivative, Loss on Derivative			$ 303,000	347,000
Derivative asset, current					$ 1,585,000
Secured Line of Credit [Member] | PNC Bank [Member]
Other Commitments [Line Items]
Maximum Borrowing Capacity		$ 30,000,000
Short-Term Borrowings				0
Secured Line of Credit [Member] | PNC Bank [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Other Commitments [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.61%
Unsecured Line of Credit [Member] | PNC Bank [Member]
Other Commitments [Line Items]
Maximum Borrowing Capacity		$ 55,000,000
Short-Term Borrowings				0
Unsecured Line of Credit [Member] | PNC Bank [Member] | EGL [Member]
Other Commitments [Line Items]
Maximum Borrowing Capacity	$ 75,000,000
Short-Term Borrowings				$ 0
Unsecured Line of Credit [Member] | PNC Bank [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Other Commitments [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.91%
Unsecured Line of Credit [Member] | PNC Bank [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | EGL [Member]
Other Commitments [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.91%