Schedule III - Supplementary Insurance Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule III - Supplementary Insurance Information
Deferred Policy Acquisition Costs	$ 73,024	$ 74,962	$ 74,287
Future Policy Benefits, Losses, Claims and Loss Expenses	570,651	567,581	610,566
Unearned Premiums	413,487	421,901	442,219
Earned Premiums	774,328	771,078	788,777
Premium Revenue	774,328	771,078	788,777
Net Investment Income	44,135	41,045	46,665
Benefits, Claims, Losses, and Settlement Expenses	461,727	404,556	509,846
Amortization of Deferred Policy Acquisition Costs	146,573	146,955	147,945
Other Operating Expenses	111,819	119,527	96,191
Premiums Written	$ 764,526	$ 763,537	$ 794,409