Consolidated Statements Of Operations And Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
REVENUES:
Premiums earned	$ 556,653	$ 546,050	$ 1,527,433	$ 1,588,536
Net investment income	64,570	63,363	196,887	206,869
Net realized capital gains (losses):
Other-than-temporary impairments on fixed maturity securities	(836)	(10,502)	(25,242)	(43,433)
Other-than-temporary impairments on fixed maturity securities transferred to other comprehensive income (loss)
Realized gain (loss) on sale of subsidiary	(28,032)	94,704	(28,032)	94,704
Other net realized capital gains (losses)	(21,195)	(205,897)	(34,001)	(100,445)
Total net realized capital gains (losses)	(50,063)	(121,695)	(87,275)	(49,174)
Other income (expense)	(13,208)	10,828	(10,806)	38,950
Total revenues	557,952	498,546	1,626,239	1,785,181
CLAIMS AND EXPENSES:
Incurred losses and loss adjustment expenses	301,603	370,754	936,201	1,002,513
Commission, brokerage, taxes and fees	85,563	72,151	226,511	241,635
Other underwriting expenses	64,149	56,953	181,706	157,069
Corporate expenses	1,835	1,637	6,181	5,031
Interest, fee and bond issue cost amortization expense	8,859	8,859	26,576	26,576
Total claims and expenses	462,009	510,354	1,377,175	1,432,824
INCOME (LOSS) BEFORE TAXES	95,943	(11,808)	249,064	352,357
Income tax expense (benefit)	21,145	(7,149)	66,990	107,306
NET INCOME (LOSS)	74,798	(4,659)	182,074	245,051
Other comprehensive income (loss), net of tax :
Unrealized appreciation (depreciation) ("URA(D)") on securities arising during the period	3,808	(29,878)	62,672	(49,866)
Less: reclassification adjustment for realized losses (gains) included in net income (loss)	(2,767)	11,625	23,085	48,951
Total URA(D) on securities arising during the period	1,041	(18,253)	85,757	(915)
Foreign currency translation adjustments	(2,642)	(27,473)	27,779	(44,636)
Benefit plan actuarial net gain (loss) for the period
Reclassification adjustment for amortization of net (gain) loss included in net income (loss)	1,268	1,556	3,949	4,769
Total benefit plan net gain (loss) for the period	1,268	1,556	3,949	4,769
Total other comprehensive income (loss), net of tax	(333)	(44,170)	117,485	(40,782)
COMPREHENSIVE INCOME (LOSS)	$ 74,465	$ (48,829)	$ 299,559	$ 204,269