Segment Information (Tables)

12 Months Ended

Dec. 31, 2019

Segment Information

Summary of gross written premiums by customer segments

	Years Ended December 31
($ in thousands)	2019				2018				2017
Customer segment
Construction	$	117,918	12.2	%	$	101,946	11.4	%	$	73,378	8.8	%
Consumer Services		133,682	13.8			107,086	12.0			94,384	11.3
Marine and Energy		94,071	9.7			82,978	9.3			79,238	9.5
Media and Entertainment		124,950	12.9			119,926	13.4			114,442	13.7
Professional Services		119,326	12.4			110,546	12.3			112,575	13.4
Real Estate		167,635	17.3			132,652	14.8			132,029	15.8
Sports		30,079	3.1			23,590	2.6			22,224	2.6
Transportation		112,191	11.6			92,169	10.3			85,079	10.2
Customer segment subtotal		899,852	93.0			770,893	86.1			713,349	85.3
Other		68,159	7.0			124,219	13.9			122,985	14.7
Specialty Insurance total	$	968,011	100.0	%	$	895,112	100.0	%	$	836,334	100.0	%

Summary of gross written premiums by line of business across customer segments

	Years Ended December 31
($ in thousands)	2019				2018				2017
Line of business
Commercial Auto	$	205,303	21.2	%	$	151,612	16.9	%	$	124,688	14.9	%
General Liability		335,197	34.6			277,948	31.1			272,660	32.6
Workers’ Compensation		179,432	18.6			246,302	27.5			235,668	28.2
Commercial Multiple Peril		82,126	8.5			67,351	7.5			73,859	8.8
All Other Lines		165,953	17.1			151,899	17.0			129,459	15.5
Specialty Insurance total	$	968,011	100.0	%	$	895,112	100.0	%	$	836,334	100.0	%