Schedule VI - Supplemental Information Concerning Property-Casualty Insurance Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Supplemental Information For Property, Casualty Insurance Underwriters [Abstract]
Deferred Policy Acquisition Costs	$ 22,994	$ 14,291
Reserves for Unpaid Claims and Claim Adjustment Expenses	620,355	527,247
Unearned Premiums	388,926	298,061
Earned Premiums	436,877	363,087
Net Investment Income	20,604	18,232
Claims and Claim Adjustment Expenses Incurred Related to Current year	301,265	250,075
Claims and Claim Adjustment Expenses Incurred Related to Prior years	60,900	5,953
Amortization of Deferred Policy Acquisition Costs	(12,686)	37,436
Paid Claims and Claims Adjustment Expenses	319,945	322,985
Net Premiums Written	$ 496,522	$ 363,798