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Segment Information (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Schedule of Revenue By Segment

Revenue by Segment		Quarter ended September 30,							Nine Months ended September 30,
($ in thousands)		2017				2016			2017			2016
Standard Commercial Lines:
Net premiums earned:
Commercial automobile		$	111,711			100,612			327,156			294,927
Workers compensation		77,580				78,596			236,366			229,847
General liability		141,059				133,981			422,546			391,349
Commercial property		78,151				74,052			232,594			217,821
Businessowners’ policies		25,019				24,461			74,853			73,016
Bonds		7,420				5,795			20,904			16,924
Other		4,310				4,089			12,839			11,868
Miscellaneous income		1,712				1,925			7,588			6,182
Total Standard Commercial Lines revenue		446,962				423,511			1,334,846			1,241,934
Standard Personal Lines:
Net premiums earned:
Personal automobile		38,612				34,865			113,225			106,526
Homeowners		32,215				32,031			97,382			98,342
Other		1,774				1,794			4,867			4,851
Miscellaneous income		282				275			938			836
Total Standard Personal Lines revenue		72,883				68,965			216,412			210,555
E&S Lines:
Net premiums earned:
Commercial liability		40,090				38,991			117,056			112,787
Commercial property		14,114				13,162			41,151			38,561
Miscellaneous income		—				(1	)		—			—
Total E&S Lines revenue		54,204				52,152			158,207			151,348
Investments:
Net investment income		40,446				33,375			119,295			95,326
Net realized investment gains		6,798				3,688			7,487			2,749
Total Investments revenue		47,244				37,063			126,782			98,075
Total revenues		$	621,293			581,691			1,836,247			1,701,912

Income Before Federal Income Tax		Quarter ended September 30,							Nine Months ended September 30,
($ in thousands)		2017				2016			2017			2016
Standard Commercial Lines:
Underwriting gain		$	35,329			30,124			112,634			101,229
GAAP combined ratio		92.1		%		92.9			91.5			91.8
Statutory combined ratio		91.7				92.0			90.2			90.1
Standard Personal Lines:
Underwriting gain		$	8,179			4,271			7,517			19,001
GAAP combined ratio		88.7		%		93.8			96.5			90.9
Statutory combined ratio		86.4				92.0			95.2			90.7
E&S Lines:
Underwriting loss		$	(11,063	)		(2,362	)		(8,174	)		(3,465	)
GAAP combined ratio		120.4		%		104.5			105.2			102.3
Statutory combined ratio		120.1				101.4			104.6			100.9
Investments:
Net investment income		$	40,446			33,375			119,295			95,326
Net realized investment gains		6,798				3,688			7,487			2,749
Total investment income, before federal income tax		47,244				37,063			126,782			98,075
Tax on investment income		13,236				9,752			34,572			24,290
Total investment income, after federal income tax		$	34,008			27,311			92,210			73,785

Schedule of Income Before Federal Income Tax

Income Before Federal Income Tax		Quarter ended September 30,							Nine Months ended September 30,
($ in thousands)		2017				2016			2017			2016
Standard Commercial Lines:
Underwriting gain		$	35,329			30,124			112,634			101,229
GAAP combined ratio		92.1		%		92.9			91.5			91.8
Statutory combined ratio		91.7				92.0			90.2			90.1
Standard Personal Lines:
Underwriting gain		$	8,179			4,271			7,517			19,001
GAAP combined ratio		88.7		%		93.8			96.5			90.9
Statutory combined ratio		86.4				92.0			95.2			90.7
E&S Lines:
Underwriting loss		$	(11,063	)		(2,362	)		(8,174	)		(3,465	)
GAAP combined ratio		120.4		%		104.5			105.2			102.3
Statutory combined ratio		120.1				101.4			104.6			100.9
Investments:
Net investment income		$	40,446			33,375			119,295			95,326
Net realized investment gains		6,798				3,688			7,487			2,749
Total investment income, before federal income tax		47,244				37,063			126,782			98,075
Tax on investment income		13,236				9,752			34,572			24,290
Total investment income, after federal income tax		$	34,008			27,311			92,210			73,785

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)		2017				2016			2017			2016
Underwriting gain (loss), before federal income tax
Standard Commercial Lines		$	35,329			30,124			112,634			101,229
Standard Personal Lines		8,179				4,271			7,517			19,001
E&S Lines		(11,063		)		(2,362	)		(8,174	)		(3,465	)
Investment income, before federal income tax		47,244				37,063			126,782			98,075
Total all segments		79,689				69,096			238,759			214,840
Interest expense		(6,085		)		(5,714	)		(18,272	)		(16,940	)
General corporate and other expenses		(6,289		)		(7,939	)		(26,669	)		(28,271	)
Income, before federal income tax		$	67,315			55,443			193,818			169,629

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