Statutory Net Income and Surplus (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) item	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Statutory Net Income and Surplus
Statutory net income	$ 83,092
Statutory capital and surplus	$ 833,432
Period of statutory measurement of income and dividends	12 months
Maximum available for dividends without approval	$ 83,343
Company's insurance company subsidiaries
Statutory Net Income and Surplus
Statutory net income	83,092	$ 43,387	$ (4,022)
Statutory capital and surplus	$ 833,432	$ 758,789
Dividend limitation without prior permission, percentage of preceding surplus	10.00%
Period allowed for Commissioner to object to notice of an extraordinary dividend	30 days
Restricted net assets amount	$ 750,089
Number of levels of regulatory action, risk-based capital law | item	4
Minimum statutory capital and surplus or company action level risk-based capital	$ 232,798
Safety Insurance Company
Statutory Net Income and Surplus
Statutory capital and surplus	833,432
Paid dividends	$ 51,993