Significant Accounting Policies - Administrative services (Details) - Administrative services reimbursement revenue	12 Months Ended
	Dec. 31, 2024
Direct expense
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Nature of expense as a percentage of total policy issuance and renewal expenses	70.00%
Allocated expense
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Nature of expense as a percentage of total policy issuance and renewal expenses	30.00%