Schedule III - Supplementary Insurance Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Supplementary Insurance Information, by Segment [Line Items]
Deferred Policy Acquisition Costs	$ 17,840	$ 22,994
Future Policy Benefits, Losses, Claims and Loss Adjustment Expenses	789,768	620,355
Unearned Premiums	320,806	388,926
Other Policy Claims and Benefits Payable	0	0
Premium Revenue	481,798	436,877
Net Investment Income	12,920	20,604
Benefits Claims, Losses and Settlement Expenses	412,851	362,165
Amortization of Deferred Policy Acquisition Costs	78,816	(12,686)
Other Operating Expenses	121,112	126,063
Net Premiums Written	438,973	496,552
Specialty Commercial Segment [Member]
Supplementary Insurance Information, by Segment [Line Items]
Deferred Policy Acquisition Costs	9,070	14,108
Future Policy Benefits, Losses, Claims and Loss Adjustment Expenses	678,017	520,117
Unearned Premiums	255,840	321,047
Other Policy Claims and Benefits Payable	0	0
Premium Revenue	336,920	292,588
Net Investment Income	12,338	15,856
Benefits Claims, Losses and Settlement Expenses	291,938	248,781
Amortization of Deferred Policy Acquisition Costs	49,162	(38,274)
Other Operating Expenses	57,449	68,545
Net Premiums Written	295,173	350,047
Standard Commercial Segment [Member]
Supplementary Insurance Information, by Segment [Line Items]
Deferred Policy Acquisition Costs	4,872	4,530
Future Policy Benefits, Losses, Claims and Loss Adjustment Expenses	86,291	72,208
Unearned Premiums	46,849	44,032
Other Policy Claims and Benefits Payable	0	0
Premium Revenue	66,554	63,970
Net Investment Income	3,061	3,879
Benefits Claims, Losses and Settlement Expenses	52,478	50,036
Amortization of Deferred Policy Acquisition Costs	12,910	9,730
Other Operating Expenses	20,694	18,275
Net Premiums Written	68,396	62,892
Personal Segment [Member]
Supplementary Insurance Information, by Segment [Line Items]
Deferred Policy Acquisition Costs	3,898	4,356
Future Policy Benefits, Losses, Claims and Loss Adjustment Expenses	25,460	28,030
Unearned Premiums	18,117	23,847
Other Policy Claims and Benefits Payable	0	0
Premium Revenue	78,324	80,319
Net Investment Income	842	1,139
Benefits Claims, Losses and Settlement Expenses	68,435	63,348
Amortization of Deferred Policy Acquisition Costs	16,744	15,858
Other Operating Expenses	25,868	25,058
Net Premiums Written	75,404	83,613
Corporate [Member]
Supplementary Insurance Information, by Segment [Line Items]
Deferred Policy Acquisition Costs	0	0
Future Policy Benefits, Losses, Claims and Loss Adjustment Expenses	0	0
Unearned Premiums	0	0
Other Policy Claims and Benefits Payable	0	0
Premium Revenue	0	0
Net Investment Income, Corporate	(3,321)	(270)
Benefits Claims, Losses and Settlement Expenses	0	0
Amortization of Deferred Policy Acquisition Costs	0	0
Other Operating Expenses	17,101	14,185
Net Premiums Written	$ 0	$ 0