Schedule VI - Supplemental Information Concerning Property-Casualty Insurance Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Supplemental Information For Property, Casualty Insurance Underwriters [Abstract]
Deferred Policy Acquisition Costs	$ 17,840	$ 22,994
Reserves for Unpaid Claims and Claim Adjustment Expenses	789,768	620,355
Unearned Premiums	320,806	388,926
Earned Premiums	481,798	436,877
Net Investment Income	12,920	20,604
Current year	332,863	301,265
Current year	354,563
Prior years	58,288	60,900
Amortization of Deferred Policy Acquisition Costs	78,816	(12,686)
Paid Claims and Claims Adjustment Expenses	320,419	319,945
Net Premiums Written	$ 438,973	$ 496,522