Schedule VI - Supplemental Information Concerning Property and Casualty Insurance Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental Information Concerning Property and Casualty Insurance Operations
Earned Premiums	$ 774,328	$ 771,078	$ 788,777
Current year	515,400	459,400	551,895
Prior year	(53,673)	(54,844)	(42,049)
Consolidated Property & Casualty Subsidiaries
Supplemental Information Concerning Property and Casualty Insurance Operations
Deferred Policy Acquisition Costs	73,024	74,962	74,287
Reserves for Unpaid Claims and Claims Adjustment Expenses	570,651	567,581	610,566
Unearned Premiums	413,487	421,901	442,219
Earned Premiums	774,328	771,078	788,777
Net Investment Income	44,135	41,045	46,665
Current year	515,400	459,400	551,895
Prior year	(53,673)	(54,844)	(42,049)
Amortization of Deferred Policy Acquisition Costs	146,573	146,955	147,945
Paid Claims and Claims Adjustment Expenses	443,013	431,480	497,973
Premiums Written	$ 764,526	$ 763,537	$ 794,409