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Schedule IV - Reinsurance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Amount	$ 5,034,952	$ 4,386,556	$ 3,880,522
Ceded to Other Companies	684,955	583,977	537,884
Assumed from Other Companies	26,450	25,027	30,742
Net	$ 4,376,447	$ 3,827,606	$ 3,373,380
% of Amount Assumed to Net	1.00%	1.00%	1.00%
Accident and health insurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Amount	$ 0	$ 0	$ 0
Ceded to Other Companies	0	0	0
Assumed from Other Companies	0	0	0
Net	$ 0	$ 0	$ 0
% of Amount Assumed to Net	0.00%	0.00%	0.00%
Property and liability insurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Direct Amount	$ 5,034,952	$ 4,386,556	$ 3,880,522
Ceded to Other Companies	684,955	583,977	537,884
Assumed from Other Companies	26,450	25,027	30,742
Net	$ 4,376,447	$ 3,827,606	$ 3,373,380
% of Amount Assumed to Net	1.00%	1.00%	1.00%

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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