Segment Information (Tables)

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Schedule of Revenue By Segment

Revenue by Segment	Quarter ended September 30,			Nine Months ended September 30,
($ in thousands)	2015		2014	2015	2014
Standard Commercial Lines:
Net premiums earned:
Commercial automobile	$	90,758	83,536	265,771	249,224
Workers compensation	74,560		66,732	213,991	205,137
General liability	123,252		110,894	357,430	331,303
Commercial property	68,587		61,304	199,699	182,716
Businessowners’ policies	23,726		21,649	69,603	63,797
Bonds	5,031		4,791	15,137	14,281
Other	3,628		3,237	10,649	9,633
Miscellaneous income	448		2,830	4,680	13,315
Total Standard Commercial Lines revenue	389,990		354,973	1,136,960	1,069,406
Standard Personal Lines:
Net premiums earned:
Personal automobile	36,623		37,695	110,373	113,943
Homeowners	33,670		33,957	101,122	100,831
Other	1,795		2,725	5,143	8,965
Miscellaneous income	250		366	841	1,608
Total Standard Personal Lines revenue	72,338		74,743	217,479	225,347
E&S Lines:
Net premiums earned:
General liability	32,395		24,659	87,914	70,526
Commercial property	11,309		10,048	31,428	28,544
Commercial automobile	2,056		1,412	5,562	3,859
Total E&S Lines revenue	45,760		36,119	124,904	102,929
Investments:
Net investment income	32,061		34,292	91,208	106,600
Net realized investment gains	308		15,231	15,771	26,988
Total Investments revenue	32,369		49,523	106,979	133,588
Total segments revenue	540,457		515,358	1,586,322	1,531,270
Other income	—		—	—	8
Total revenues	$	540,457	515,358	1,586,322	1,531,278

Schedule of Income Before Federal Income Tax

Income Before Federal Income Tax	Quarter ended September 30,					Nine Months ended September 30,
($ in thousands)	2015			2014		2015		2014
Standard Commercial Lines:
Underwriting gain	$	44,027		27,771		109,304		39,844
GAAP combined ratio	88.7		%	92.1		90.3		96.2
Statutory combined ratio	88.4			90.9		89.4		95.5
Standard Personal Lines:
Underwriting gain (loss)	$	2,826		8,037		(4,295	)	95
GAAP combined ratio	96.1		%	89.2		102.0		100.0
Statutory combined ratio	95.0			88.9		101.7		99.9
E&S Insurance Operations:
Underwriting loss	$	(2,022	)	(1,371	)	(5,033	)	(433	)
GAAP combined ratio	104.4		%	103.8		104.0		100.4
Statutory combined ratio	101.1			102.9		101.8		100.3
Investments:
Net investment income	$	32,061		34,292		91,208		106,600
Net realized investment gains	308			15,231		15,771		26,988
Total investment income, before federal income tax	32,369			49,523		106,979		133,588
Tax on investment income	7,614			13,858		26,186		36,374
Total investment income, after federal income tax	$	24,755		35,665		80,793		97,214

Schedule of Reconciliation of Segment Results to Income Before Federal Income Tax

Reconciliation of Segment Results to Income Before Federal Income Tax	Quarter ended September 30,					Nine Months ended September 30,
($ in thousands)	2015			2014		2015		2014
Underwriting gain (loss), before federal income tax
Standard Commercial Lines	$	44,027		27,771		109,304		39,844
Standard Personal Lines	2,826			8,037		(4,295	)	95
E&S Lines	(2,022		)	(1,371	)	(5,033	)	(433	)
Investment income, before federal income tax	32,369			49,523		106,979		133,588
Total all segments	77,200			83,960		206,955		173,094
Interest expense	(5,489		)	(5,558	)	(16,458	)	(16,544	)
General corporate and other expenses	(5,872		)	(3,076	)	(21,603	)	(16,619	)
Income before federal income tax	$	65,839		75,326		168,894		139,931