Property and Casualty Insurance Activity - Schedule of Material Terms for Reinsurance Treaties (Details) $ in Thousands				1 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended							7 Months Ended		9 Months Ended	12 Months Ended					18 Months Ended
	Jul. 01, 2026 USD ($) claim	Jan. 01, 2026	Jan. 01, 2025	Jun. 30, 2026 USD ($) claim	Dec. 31, 2025 USD ($)	Apr. 30, 2025 USD ($)	Jun. 30, 2027 USD ($)	Dec. 31, 2026 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2026 USD ($)	Dec. 31, 2025 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Apr. 30, 2026 USD ($)	Apr. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2027 USD ($)	Dec. 31, 2026	Jun. 30, 2026 USD ($)	Dec. 31, 2025	Jun. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)
Effects of Reinsurance [Line Items]
Single risk coverage										$ 9,000
Catastrophe coverage, multiple of per occurrence limitation | claim				2
Catastrophe coverage, except for one occurrence limitation				80.00%
Catastrophic coverage, first layer				$ 5,000															$ 5,000
Excess of catastrophic coverage, first layer				$ 5,000															5,000
Catastrophe coverage, one occurrence limitation				52.00%
Catastrophic coverage, top layer				$ 240,000
Excess of catastrophic coverage, top layer				$ 200,000
Reinstatement of premium protection, catastrophe coverage															$ 4,500				50,000		$ 50,000
Excess of catastrophe coverage															$ 5,500				$ 10,000		$ 10,000
Underlying XOL treaty, reinsurance coverage (percent)												50.00%		90.00%	71.00%				50.00%			50.00%
Reinstatement of premium protection																						$ 400
Reinstatement of premium protection, excluded amount																						600
Risk retention amount											$ 640	$ 530				$ 730			$ 825			$ 530
Underlying XOL treaty, reinsurance coverage, layer one (percent)																			50.00%
Reinstatement of premium protection, layer one																			$ 250
Reinstatement of premium protection, layer one, excluded amount																			$ 750
Underlying XOL treaty, reinsurance coverage, layer two (percent)																			100.00%
Reinstatement of premium protection, layer two, excluded amount																			$ 1,000
Reinstatement of premium protection, layer two																			$ 9,000
Catastrophe, first layer coverage (percent)																			80.00%
Catastrophe coverage, remaining (in percent)																			100.00%
Catastrophe coverage, remaining layer																			$ 430,000
Excess of catastrophe coverage, remaining																			10,000
Catastrophe reinsurance coverage, (percent)															71.00%
Underlying XOL treaty, excess of loss coverage amount												400		$ 5,000	$ 4,500				250
Underlying XOL treaty, excess of loss coverage excluded amount												$ 600		5,000	$ 5,500				750
Limited retention					$ 3,900	$ 5,200								$ 5,000
Subsequent Event
Effects of Reinsurance [Line Items]
Single risk coverage	$ 11,000
Catastrophe coverage, multiple of per occurrence limitation | claim	2
Catastrophe coverage, except for one occurrence limitation	70.00%
Catastrophe coverage, one occurrence limitation	45.00%
Catastrophic coverage, top layer	$ 275,000
Excess of catastrophic coverage, top layer	215,000
Catastrophe, first layer coverage, perils excluding storms	5,000
Excess of catastrophic coverage, first layer, perils excluding storms	$ 5,000
Catastrophe coverage, for storms occurrence limitation	95.00%
Catastrophe, first layer coverage, for storms	$ 5,000
Excess of catastrophic coverage, first layer, for storms	$ 5,000
Catastrophe coverage, number of consecutive hours | claim	168
Minimum
Effects of Reinsurance [Line Items]
Direct loss										3,500
Risk retention amount																			$ 640
Maximum
Effects of Reinsurance [Line Items]
Direct loss										$ 9,000
Maximum | Subsequent Event
Effects of Reinsurance [Line Items]
Direct loss	$ 11,000
Forecast
Effects of Reinsurance [Line Items]
Catastrophic coverage, first layer																	$ 5,000
Excess of catastrophic coverage, first layer																	5,000
Reinstatement of premium protection, catastrophe coverage																	50,000
Excess of catastrophe coverage																	$ 10,000
Underlying XOL treaty, reinsurance coverage (percent)																	50.00%
Underlying XOL treaty, reinsurance coverage, layer one (percent)																	50.00%
Reinstatement of premium protection, layer one																	$ 250
Reinstatement of premium protection, layer one, excluded amount																	$ 750
Underlying XOL treaty, reinsurance coverage, layer two (percent)																	100.00%
Reinstatement of premium protection, layer two, excluded amount																	$ 1,000
Reinstatement of premium protection, layer two																	$ 11,000
Catastrophe, first layer coverage (percent)																	95.00%
Catastrophe coverage, remaining (in percent)																	100.00%
Catastrophe coverage, remaining layer																	$ 490,000
Underlying XOL treaty, excess of loss coverage amount																	250
Underlying XOL treaty, excess of loss coverage excluded amount																	$ 750
Other catastrophe risks																	70.00%
Forecast | Maximum
Effects of Reinsurance [Line Items]
Risk retention amount																	$ 715
Catastrophe Reinsurance:
Effects of Reinsurance [Line Items]
Initial loss subject to personal lines quota share treaty									$ 10,000		10,000		$ 10,000
Risk retained per catastrophe occurrence									5,500		5,000		4,250
Catastrophe loss coverage in excess of quota share coverage									$ 434,500		$ 435,000		$ 275,000
Reinstatement premium protection									Yes		Yes		Yes
Catastrophe Reinsurance: | Forecast
Effects of Reinsurance [Line Items]
Initial loss subject to personal lines quota share treaty								$ 10,000
Risk retained per catastrophe occurrence							$ 5,250	4,750
Catastrophe loss coverage in excess of quota share coverage							$ 494,750	$ 495,250
Reinstatement premium protection							Yes	Yes
Personal Lines:
Effects of Reinsurance [Line Items]
Quota share treaty percent ceded		5.00%	16.00%						5.00%		16.00%		16.00%							16.00%
Risk retained on initial $1,000,000 of losses									$ 950		$ 840		$ 840
Losses per occurrence subject to quota share reinsurance coverage									1,000		1,000		1,000
Excess of loss coverage and facultative facility coverage									8,250		8,250		8,400
in excess of 1									750		750		600
Total reinsurance coverage per occurrence									8,175		8,285		8,360
Losses per occurrence subject to reinsurance coverage									$ 9,000		$ 9,000		$ 9,000
Quota share treaty percent excluded from percent ceded																				6.00%
Personal Lines: | Forecast
Effects of Reinsurance [Line Items]
Quota share treaty percent ceded								5.00%										30.00%
Risk retained on initial $1,000,000 of losses								$ 950
Losses per occurrence subject to quota share reinsurance coverage								1,000
Excess of loss coverage and facultative facility coverage							$ 10,250	10,250
in excess of 1							750	750
Total reinsurance coverage per occurrence							10,125	10,175
Losses per occurrence subject to reinsurance coverage							$ 11,000	$ 11,000
Quota share treaty percent excluded from percent ceded																		5.00%