Industry Segments (Tables)

9 Months Ended

Sep. 30, 2014

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, 2014:
Insurance-Domestic	$	1,093,554	$	125,792	$	26,408	$	1,245,754	$	228,359		$	154,718
Insurance-International	205,529		19,957		—		225,486		12,603			9,217
Reinsurance-Global	161,721		26,916		—		188,637		29,005			20,207
Corporate and eliminations (1)	—		6,560		101,910		108,470		(63,772		)	(42,571		)
Net investment gains	—		—		72,258		72,258		72,258			46,968
Total	$	1,460,804	$	179,225	$	200,576	$	1,840,605	$	278,453		$	188,539
Three months ended September 30, 2013:
Insurance-Domestic	$	958,994	$	94,071	$	26,125	$	1,079,190	$	172,177		$	118,183
Insurance-International	189,054		11,151		—		200,205		16,129			11,225
Reinsurance-Global	180,814		20,121		—		200,935		24,559			17,300
Corporate and eliminations (1)	—		291		109,634		109,925		(58,501		)	(38,248		)
Net investment gains	—		—		43,869		43,869		43,869			28,514
Total	$	1,328,862	$	125,634	$	179,628	$	1,634,124	$	198,233		$	136,974
Nine months ended September 30, 2014:
Insurance-Domestic	$	3,138,806	$	347,002	$	82,159	$	3,567,967	$	607,399		$	414,588
Insurance-International	592,721		47,885		—		640,606		41,860			29,938
Reinsurance-Global	510,534		72,102		—		582,636		86,945			60,624
Corporate and eliminations (1)	—		19,676		299,435		319,111		(180,892		)	(119,194		)
Net investment gains	—		—		234,180		234,180		234,180			152,217
Total	$	4,242,061	$	486,665	$	615,774	$	5,344,500	$	789,492		$	538,173
Nine months ended September 30, 2013:
Insurance-Domestic	$	2,769,369	$	299,430	$	80,513	$	3,149,312	$	465,861		$	324,069
Insurance-International	540,365		36,383		—		576,748		51,094			35,794
Reinsurance-Global	533,762		65,656		—		599,418		87,252			61,375
Corporate and eliminations (1)	—		3,831		285,650		289,481		(183,941		)	(114,674		)
Net investment gains	—		—		96,896		96,896		96,896			62,982
Total	$	3,843,496	$	405,300	$	463,059	$	4,711,855	$	517,162		$	369,546

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

Identifiable Assets By Segment

Identifiable assets by segment are as follows:

(In thousands)	September 30, 2014		December 31, 2013
Insurance-Domestic	$	16,074,387	$	15,247,807
Insurance-International	1,915,322		1,516,310
Reinsurance-Global	2,801,268		3,103,193
Corporate and eliminations	1,306,620		684,486
Total	$	22,097,597	$	20,551,796

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)	2014		2013		2014		2013
Insurance-Domestic:
Other liability	$	368,818	$	314,878	$	1,070,525	$	917,910
Workers’ compensation	291,297		252,220		824,541		722,422
Short-tail lines	222,561		199,181		642,833		570,868
Commercial automobile	134,197		125,942		385,667		361,964
Professional liability	76,681		66,773		215,240		196,205
Total	1,093,554		958,994		3,138,806		2,769,369
Insurance-International:
Other liability	27,705		18,457		70,036		48,745
Workers’ compensation	18,012		20,847		52,578		65,482
Short-tail lines	100,417		92,213		303,119		248,637
Commercial automobile	29,076		30,898		86,318		97,929
Professional liability	30,319		26,639		80,670		79,572
Total	205,529		189,054		592,721		540,365
Reinsurance-Global:
Casualty	122,741		128,127		372,894		371,571
Property	38,980		52,687		137,640		162,191
Total	161,721		180,814		510,534		533,762
Total	$	1,460,804	$	1,328,862	$	4,242,061	$	3,843,496