Investments - Schedule of Fair Value of Restricted Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025
Restricted Cash and Investments Items [Line Items]
Total restricted cash	$ 10,216	$ 9,146	$ 14,717
Restricted investments – receivable for investments sold under related party agreements	566	0
Total restricted investments	137,381	154,718
Total restricted cash and investments	147,597	163,864
Third Party Agreements
Restricted Cash and Investments Items [Line Items]
Total restricted cash	7,155	7,767
Restricted investments	48,535	52,350
Amortized cost	48,323	51,927
Related Party Agreements
Restricted Cash and Investments Items [Line Items]
Total restricted cash	3,061	1,379
Restricted investments	88,280	102,368
Amortized cost	$ 88,413	$ 102,313

Amount of cash and cash equivalent restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.