Industry Segments (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Financial Information Of Company Operating Segments

	Revenues
(In thousands)	Earned Premiums		Investment Income		Other		Total		Pre-Tax Income (Loss)			Net Income (Loss) to Common Stockholders
Three months ended September 30, 2016
Insurance	$	1,431,664	$	117,388	$	22,819	$	1,571,871	$	215,649		$	144,310
Reinsurance	154,280		21,478		—		175,758		22,171			15,167
Corporate, other and eliminations (1)	—		6,802		89,560		96,362		(81,941		)	(53,055		)
Net investment gains	—		—		175,736		175,736		175,736			114,228
Total	$	1,585,944	$	145,668	$	288,115	$	2,019,727	$	331,615		$	220,650
Three months ended September 30, 2015
Insurance	$	1,379,501	$	106,989	$	23,021	$	1,509,511	$	204,109		$	139,446
Reinsurance	152,057		19,468		—		171,525		22,413			15,807
Corporate, other and eliminations (1)	—		6,757		119,260		126,017		(51,506		)	(37,684		)
Net investment gains	—		—		53,904		53,904		53,904			35,038
Total	$	1,531,558	$	133,214	$	196,185	$	1,860,957	$	228,920		$	152,607
Nine months ended September 30, 2016:
Insurance	$	4,206,887	322,779		$	77,215	$	4,606,881	$	604,825		$	407,346
Reinsurance	466,185		59,244		—		525,429		61,041			42,285
Corporate, other and eliminations (1)	—		22,827		338,009		360,836		(190,655		)	(123,610		)
Net investment gains	—		—		189,394		189,394		189,394			123,106
Total	$	4,673,072	$	404,850	$	604,618	$	5,682,540	$	664,605		$	449,127
Nine months ended September 30, 2015:
Insurance	$	4,042,159	$	309,337	$	72,981	$	4,424,477	$	575,748		$	395,581
Reinsurance	454,453		54,575		—		509,028		69,797			49,134
Corporate, other and eliminations (1)	—		21,124		340,267		361,391		(170,226		)	(116,094		)
Net investment gains	—		—		100,505		100,505		100,505			65,328
Total	$	4,496,612	$	385,036	$	513,753	$	5,395,401	$	575,824		$	393,949

________

(1) Corporate, other and eliminations represent corporate revenues and expenses that are not allocated to business segments.

Identifiable Assets By Segment

Identifiable Assets

(In thousands)	September 30, 2016		December 31, 2015
Insurance	$	18,972,237	$	18,063,730
Reinsurance	2,585,307		2,441,340
Corporate, other and eliminations	1,788,112		1,219,086
Consolidated	$	23,345,656	$	21,724,156

Net Premiums Earned By Major Line Of Business

Net premiums earned by major line of business are as follows:

	For the Three Months				For the Nine Months
	Ended September 30,				Ended September 30,
(In thousands)	2016		2015		2016		2015
Insurance:
Other liability	$	465,068	$	418,133	$	1,331,143	$	1,216,411
Workers’ compensation	355,604		347,745		1,047,412		1,010,279
Short-tail lines (1)	317,498		327,357		977,138		973,606
Commercial automobile	164,540		170,660		481,249		506,229
Professional liability	128,954		115,606		369,945		335,634
Total Insurance	1,431,664		1,379,501		4,206,887		4,042,159
Reinsurance:
Casualty	93,757		103,198		290,373		314,462
Property	60,523		48,859		175,812		139,991
Total Reinsurance	154,280		152,057		466,185		454,453
Total	$	1,585,944	$	1,531,558	$	4,673,072	$	4,496,612