Schedule VI - Supplemental Information Concerning Property and Casualty Insurance Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Supplemental Information Concerning Property and Casualty Insurance Operations
Earned Premiums	$ 758,505	$ 774,328	$ 771,078
Current year	549,258	515,400	459,400
Prior year	(57,279)	(53,673)	(54,844)
Consolidated Property & Casualty Subsidiaries
Supplemental Information Concerning Property and Casualty Insurance Operations
Deferred Policy Acquisition Costs	75,582	73,024	74,962
Reserves for Unpaid Claims and Claims Adjustment Expenses	549,598	570,651	567,581
Unearned Premiums	433,375	413,487	421,901
Earned Premiums	758,505	774,328	771,078
Net Investment Income	46,725	44,135	41,045
Current year	549,258	515,400	459,400
Prior year	(57,279)	(53,673)	(54,844)
Amortization of Deferred Policy Acquisition Costs	146,013	146,573	146,955
Paid Claims and Claims Adjustment Expenses	515,759	443,013	431,480
Premiums Written	$ 773,735	$ 764,526	$ 763,537