Schedule III - Supplementary Insurance Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule III - Supplementary Insurance Information
Deferred Policy Acquisition Costs	$ 75,582	$ 73,024	$ 74,962
Future Policy Benefits, Losses, Claims and Loss Expenses	549,598	570,651	567,581
Unearned Premiums	433,375	413,487	421,901
Earned Premiums	758,505	774,328	771,078
Premium Revenue	758,505	774,328	771,078
Net Investment Income	46,725	44,135	41,045
Benefits, Claims, Losses, and Settlement Expenses	491,979	461,727	404,556
Amortization of Deferred Policy Acquisition Costs	146,013	146,573	146,955
Other Operating Expenses	99,132	111,819	119,527
Premiums Written	$ 773,735	$ 764,526	$ 763,537