Segment Information (Schedule of Business Segment Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues [Abstract]
Revenues	$ 132,652	$ 120,903	$ 233,700	$ 239,024
Pre-Tax Income (Loss) [Abstract]
Pre-tax income (loss)	5,583	16,484	(64,003)	35,402
Specialty Commercial Segment [Member]
Revenues [Abstract]
Revenues	91,124	73,592	183,244	141,559
Pre-Tax Income (Loss) [Abstract]
Pre-tax income (loss)	5,882	10,427	22,174	18,395
Standard Commercial Segment [Member]
Revenues [Abstract]
Revenues	17,096	17,310	34,732	35,683
Pre-Tax Income (Loss) [Abstract]
Pre-tax income (loss)	802	2,057	1,518	3,564
Personal Segment [Member]
Revenues [Abstract]
Revenues	22,464	23,116	44,787	42,599
Pre-Tax Income (Loss) [Abstract]
Pre-tax income (loss)	1,884	2,441	(3,771)	4,014
Corporate [Member]
Revenues [Abstract]
Revenues	1,968	6,885	(29,063)	19,183
Pre-Tax Income (Loss) [Abstract]
Pre-tax income (loss)	$ (2,985)	$ 1,559	$ (83,924)	$ 9,429