Property and Casualty Insurance Activity (Details 5) - USD ($)	6 Months Ended
Jun. 30, 2025	Jan. 01, 2025	Jun. 30, 2024	Jan. 02, 2024	Jun. 30, 2023	Jan. 02, 2023	Jun. 30, 2022
Catastrophe [Member]
Initial loss subject to personal lines quota share treaty	$ (6)	$ 5,000,000	$ 10,000,000	$ 10,000,000	$ 10,000,000	$ 10,000,000	$ 10,000,000
Risk retained per catastrophe occurrence	5,000,000	4,750,000	9,500,000	8,750,000	8,750,000	7,400,000	7,400,000
Catastrophe loss coverage in excess of quota share coverage	$ 275,000,000	$ 275,000,000	$ 315,000,000	$ 315,000,000	$ 335,000,000	$ 335,000,000	$ 490,000,000
Reinstatement premium protection	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Property And Casualty Personal Insurance Product Line [Member]
Quota share treaty percent ceded		27.00%	27.00%	30.00%	30.00%	30.00%	30.00%
Risk retained on initial $1,000,000 of losses	$ 1,000,000	$ 730,000	$ 730,000	$ 700,000	$ 700,000	$ 700,000	$ 700,000
Losses per occurrence subject to quota share reinsurance coverage	(6)	$ 1,000,000	$ 1,000,000	$ 1,000,000	$ 1,000,000	$ 1,000,000	$ 1,000
Expiration		Jan. 01, 2025	Jan. 01, 2025	Jan. 01, 2024	Jan. 01, 2024	Jan. 01, 2023	Jan. 01, 2023
Excess of loss coverage and facultative facility coverage	$ 8,000,000	$ 8,400,000	$ 8,400,000	$ 8,400,000	$ 8,400,000	$ 8,400,000	$ 8,400,000
In excess of	in excess of	in excess of	in excess of	in excess of	in excess of	in excess of	in excess of
in excess of 1	$ 1,000,000	$ 600,000	$ 600,000	$ 600,000	$ 600,000	$ 600,000	$ 600,000
Total reinsurance coverage per occurrence	8,000,000	8,470,000	8,470,000	8,500,000	8,500,000	8,500,000	8,500,000
Losses per occurrence subject to reinsurance coverage	$ 9,000,000	$ 9,000,000	$ 9,000,000	$ 9,000,000	$ 9,000,000	$ 9,000,000	$ 9,000,000
Expiration Date	Jun. 30, 2025	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2022