Everest Re (EG) 10-Q9 Aug 172017 Q2 Quarterly reportFinancial data

Company Profile

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
Document And Entity Information - shares	Jun. 30, 2017	Aug. 01, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Entity Registrant Name	EVEREST RE GROUP LTD
Entity Central Index Key	1,095,073
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		41,063,767

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
ASSETS:
Fixed maturities - available for sale, at market value (amortized cost: 2017, $14,756,926; 2016, $13,932,613)	$ 14,922,035	$ 14,107,408
Equity securities - available for sale, at market value (cost: 2017, $110,724; 2016, $129,553)	107,430	119,067
Equity securities - available for sale, at fair value	1,071,390	1,010,085
Short-term investments	326,585	431,478
Other invested assets (cost: 2017, $1,303,231; 2016, $1,333,069)	1,304,556	1,333,129
Cash	469,205	481,922
Total investments and cash	18,201,201	17,483,089
Accrued investment income	96,928	96,473
Premiums receivable	1,830,520	1,485,990
Reinsurance receivables	1,036,998	1,018,325
Funds held by reinsureds	272,526	260,644
Deferred acquisition costs	357,325	344,052
Prepaid reinsurance premiums	281,345	191,768
Income taxes	167,913	177,704
Other assets	277,135	263,459
TOTAL ASSETS	22,521,891	21,321,504
LIABILITIES:
Reserve for losses and loss adjustment expenses	10,475,705	10,312,313
Future policy benefit reserve	54,238	55,074
Unearned premium reserve	1,744,527	1,577,546
Funds held under reinsurance treaties	23,276	21,278
Commission reserves	53,996	70,335
Other net payable to reinsurers	262,462	190,986
Losses in course of payment	356,330	67,107
4.868% Senior notes due 6/1/2044	396,774	396,714
6.6% Long term notes due 5/1/2067	236,511	236,462
Accrued interest on debt and borrowings	2,632	3,537
Equity index put option liability	18,662	22,059
Unsettled securities payable	86,931	27,927
Other liabilities	225,049	264,770
Total liabilities	13,937,093	13,246,108
Commitments and contingencies (Note 8)
SHAREHOLDERS' EQUITY:
Preferred shares, par value: $0.01; 50,000 shares authorized; no shares issued and outstanding
Common shares, par value: $0.01; 200,000 shares authorized; (2017) 69,037 and (2016) 68,871 outstanding before treasury shares	691	689
Additional paid-in capital	2,150,659	2,140,783
Accumulated other comprehensive income (loss), net of deferred income tax expense (benefit) of $758 at 2017 and $8,240 at 2016	(151,972)	(216,764)
Treasury shares, at cost; 27,972 shares 2017 and 2016	(3,272,244)	(3,272,244)
Retained earnings	9,857,664	9,422,932
Total shareholders' equity	8,584,798	8,075,396
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 22,521,891	$ 21,321,504

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Fixed maturities - available for sale, at market value, amortized cost	$ 14,756,926	$ 13,932,613
Equity securities - available for sale, at market value, cost	110,724	129,553
Other invested assets, at cost	$ 1,303,231	$ 1,333,069
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, authorized	50,000,000	50,000,000
Preferred shares, issued	0	0
Preferred shares, outstanding	0	0
Common shares, par value	$ 0.01	$ 0.01
Common shares, authorized	200,000,000	200,000,000
Common shares, outstanding	69,037,000	68,871,000
Accumulated other comprehensive income (loss), net of deferred income tax expense (benefit)	$ 758	$ 8,240
Treasury shares	27,972,000	27,972,000
Long Term Subordinated Notes [Member]
Debt instrument, stated interest rate	6.60%	6.60%
Debt instrument, maturity date	May 1, 2067
4.868% Senior notes due 6/1/2044 [Member] \| Senior Notes [Member]
Debt instrument, stated interest rate	4.868%	4.868%
Debt instrument, maturity date	Jun. 1, 2044

Consolidated Statements Of Oper

Consolidated Statements Of Operations And Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
REVENUES:
Premiums earned	$ 1,369,681	$ 1,288,860	$ 2,681,778	$ 2,507,727
Net investment income	134,508	132,737	256,797	235,261
Net realized capital gains (losses):
Other-than-temporary impairments on fixed maturity securities	(2,475)	(1,470)	(3,703)	(30,263)
Other-than-temporary impairments on fixed maturity securities transferred to other comprehensive income (loss)
Other net realized capital gains (losses)	27,743	34,128	81,699	(11,338)
Total net realized capital gains (losses)	25,268	32,658	77,996	(41,601)
Net derivative gain (loss)	766	1,996	3,396	(1,024)
Other income (expense)	388	(28,367)	(4,578)	(30,433)
Total revenues	1,530,611	1,427,884	3,015,389	2,669,930
CLAIMS AND EXPENSES:
Incurred losses and loss adjustment expenses	861,275	857,816	1,632,063	1,558,565
Commission, brokerage, taxes and fees	299,956	295,502	582,225	570,508
Other underwriting expenses	78,869	72,077	154,756	144,187
Corporate expenses	6,919	7,117	15,376	15,003
Interest, fees and bond issue cost amortization expense	8,059	9,073	17,023	18,301
Total claims and expenses	1,255,078	1,241,585	2,401,443	2,306,564
INCOME (LOSS) BEFORE TAXES	275,533	186,299	613,946	363,366
Income tax expense (benefit)	29,859	30,607	76,629	35,988
NET INCOME (LOSS)	245,674	155,692	537,317	327,378
Other comprehensive income (loss), net of tax :
Unrealized appreciation (depreciation) ("URA(D)") on securities arising during the period	4,868	124,356	24,416	267,318
Reclassification adjustment for realized losses (gains) included in net income (loss)	(8,993)	(1,448)	(11,192)	30,933
Total URA(D) on securities arising during the period	(4,125)	122,908	13,224	298,251
Foreign currency translation adjustments	35,667	5,050	47,560	14,823
Benefit plan actuarial net gain (loss) for the period
Reclassification adjustment for amortization of net (gain) loss included in net income (loss)	2,004	1,341	4,008	2,681
Total benefit plan net gain (loss) for the period	2,004	1,341	4,008	2,681
Total other comprehensive income (loss), net of tax	33,546	129,299	64,792	315,755
COMPREHENSIVE INCOME (LOSS)	$ 279,220	$ 284,991	$ 602,109	$ 643,133
EARNINGS PER COMMON SHARE:
Basic	$ 5.98	$ 3.70	$ 13.10	$ 7.73
Diluted	5.95	3.67	13.02	7.68
Dividends declared	$ 1.25	$ 1.15	$ 2.5	$ 2.3

Consolidated Statements Of Chan

Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Thousands	Common Shares [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Treasury Shares At Cost [Member]	Total
Balance, beginning of period, shares at Dec. 31, 2015	42,694,252
Issued during the period, shares	198,266
Treasury shares acquired, shares	(1,009,088)
Balance, beginning of period at Dec. 31, 2015	$ 686	$ 2,103,638	$ (231,755)	$ 8,621,972	$ (2,885,956)
Issued during the period, net	$ 2
Share-based compensation plans		16,943
Net increase (decrease) during the period			315,755			$ 315,755
Net income (loss)				327,378		327,378
Dividends declared ($1.25 per share in second quarter 2017 and $2.50 year to date per share in 2017 and $1.15 per share in second quarter 2016 and $2.30 year-to-date per share in 2016)						(96,838)
Purchase of treasury shares					(186,357)
Balance, end of period, shares at Jun. 30, 2016	41,883,430
Balance, end of period at Jun. 30, 2016	$ 688	2,120,581	84,000	8,852,512	(3,072,313)	$ 7,985,468
Balance, beginning of period, shares at Dec. 31, 2015	42,694,252
Balance, beginning of period at Dec. 31, 2015	$ 686	2,103,638	(231,755)	8,621,972	(2,885,956)
Balance, end of period, shares at Dec. 31, 2016	40,898,864					68,871,000
Balance, end of period at Dec. 31, 2016	$ 689	2,140,783	(216,764)	9,422,932	(3,272,244)	$ 8,075,396
Balance, beginning of period, shares at Mar. 31, 2016	42,399,666
Issued during the period, shares	28,492
Treasury shares acquired, shares	(544,728)
Balance, beginning of period at Mar. 31, 2016	$ 688	2,111,828	(45,299)	8,744,952	(2,971,870)
Share-based compensation plans		8,753
Net increase (decrease) during the period			129,299			129,299
Net income (loss)				155,692		155,692
Dividends declared ($1.25 per share in second quarter 2017 and $2.50 year to date per share in 2017 and $1.15 per share in second quarter 2016 and $2.30 year-to-date per share in 2016)						(48,132)
Purchase of treasury shares					(100,443)
Balance, end of period, shares at Jun. 30, 2016	41,883,430
Balance, end of period at Jun. 30, 2016	$ 688	2,120,581	84,000	8,852,512	(3,072,313)	$ 7,985,468
Balance, beginning of period, shares at Dec. 31, 2016	40,898,864					68,871,000
Issued during the period, shares	166,348
Balance, beginning of period at Dec. 31, 2016	$ 689	2,140,783	(216,764)	9,422,932	(3,272,244)	$ 8,075,396
Issued during the period, net	$ 2
Share-based compensation plans		9,876
Net increase (decrease) during the period			64,792			64,792
Net income (loss)				537,317		537,317
Dividends declared ($1.25 per share in second quarter 2017 and $2.50 year to date per share in 2017 and $1.15 per share in second quarter 2016 and $2.30 year-to-date per share in 2016)						$ (102,585)
Purchase of treasury shares
Balance, end of period, shares at Jun. 30, 2017	41,065,212					69,037,000
Balance, end of period at Jun. 30, 2017	$ 691	2,150,659	(151,972)	9,857,664	(3,272,244)	$ 8,584,798
Balance, beginning of period, shares at Mar. 31, 2017	41,057,991
Issued during the period, shares	7,221
Balance, beginning of period at Mar. 31, 2017	$ 691	2,141,653	(185,518)	9,663,294	(3,272,244)
Share-based compensation plans		9,006
Net increase (decrease) during the period			33,546			33,546
Net income (loss)				245,674		245,674
Dividends declared ($1.25 per share in second quarter 2017 and $2.50 year to date per share in 2017 and $1.15 per share in second quarter 2016 and $2.30 year-to-date per share in 2016)						$ (51,304)
Purchase of treasury shares
Balance, end of period, shares at Jun. 30, 2017	41,065,212					69,037,000
Balance, end of period at Jun. 30, 2017	$ 691	$ 2,150,659	$ (151,972)	$ 9,857,664	$ (3,272,244)	$ 8,584,798

Consolidated Statements Of Cha6

Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Consolidated Statements Of Changes In Shareholders' Equity [Abstract]
Dividends declared	$ 1.25	$ 1.15	$ 2.5	$ 2.3

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 537,317	$ 327,378
Adjustments to reconcile net income to net cash provided by operating activities:
Decrease (increase) in premiums receivable	(337,069)	20,168
Decrease (increase) in funds held by reinsureds, net	(7,980)	45,656
Decrease (increase) in reinsurance receivables	8,270	(68,284)
Decrease (increase) in income taxes	18,362	(10,424)
Decrease (increase) in prepaid reinsurance premiums	(87,091)	(51,243)
Increase (decrease) in reserve for losses and loss adjustment expenses	97,493	352,147
Increase (decrease) in future policy benefit reserve	(836)	(1,083)
Increase (decrease) in unearned premiums	161,009	(119,315)
Increase (decrease) in other net payable to reinsurers	65,929	46,508
Increase (decrease) in losses in course of payment	288,557	11,188
Change in equity adjustments in limited partnerships	(31,032)	(16,518)
Distribution of limited partnership income	22,992	41,296
Change in other assets and liabilities, net	(61,765)	26,102
Non-cash compensation expense	15,725	14,262
Amortization of bond premium (accrual of bond discount)	22,475	24,125
Amortization of underwriting discount on senior notes	2	2
Net realized capital (gains) losses	(77,996)	41,601
Net cash provided by (used in) operating activities	634,362	683,566
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from fixed maturities matured/called - available for sale, at market value	1,145,162	923,832
Proceeds from fixed maturities sold - available for sale, at market value	991,209	594,764
Proceeds from fixed securities sold - available for sale, at fair value		1,587
Proceeds from equity securities sold - available for sale, at market value	18,802	226
Proceeds from equity securities sold - available for sale, at fair value	258,226	430,038
Distributions from other invested assets	2,476,399	2,261,682
Cost of fixed maturities acquired - available for sale, at market value	(2,880,188)	(1,932,527)
Cost of equity securities acquired - available for sale, at market value	(2,610)	(2,393)
Cost of equity securities acquired - available for sale, at fair value	(258,543)	(194,043)
Cost of other invested assets acquired	(2,431,281)	(2,711,306)
Net change in short-term investments	105,566	271,913
Net change in unsettled securities transactions	47,800	59,619
Net cash provided by (used in) investing activities	(529,458)	(296,608)
CASH FLOWS FROM FINANCING ACTIVITIES:
Common shares issued during the period, net	(5,847)	2,683
Purchase of treasury shares		(186,357)
Dividends paid to shareholders	(102,585)	(96,838)
Cost of shares withheld for taxes on settlements of share-based compensation awards	(12,407)	(9,090)
Net cash provided by (used in) financing activities	(120,839)	(289,602)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	3,218	48,273
Net increase (decrease) in cash	(12,717)	145,629
Cash, beginning of period	481,922	283,658
Cash, end of period	469,205	429,287
SUPPLEMENTAL CASH FLOW INFORMATION:
Income taxes paid (recovered)	57,772	41,905
Interest paid	$ 16,704	$ 18,192

General

General	6 Months Ended
General	Jun. 30, 2017
General [Abstract]
General	1. GENERAL Everest Re Group, Ltd. ("Group"), a Bermuda company, through its subsidiaries, principally provides reinsurance and insurance in the U.S., Bermuda and international markets. As used in this document, "Company" means Group and its subsidiaries. During the third quarter of 2016, the Company established domestic subsidiaries, Everest Premier Insurance Company ("Everest Premier") and Everest Denali Insurance Company ("Everest Denali"), which will be used in the continued expansion of the Insurance operations. Effective August 24, 2016, the Company sold its wholly-owned subsidiary, Heartland Crop Insurance Company ("Heartland"), a managing agent for crop insurance, to CGB Diversified Services, Inc. ("CGB"). The operating results of Heartland through August 24, 2016, are included within the Company's financial statements. Effective July 1, 2016, the Company established a new Irish holding company, Everest Dublin Insurance Holdings Limited (Ireland) ("Everest Dublin Holdings"). During the fourth quarter of 2015, the Company established new subsidiaries, Everest Preferred International Holdings, Ltd. ("Preferred International"), a Bermuda based company and Everest International Holdings (Bermuda), Ltd. ("International Holdings"), a Bermuda based company. These new subsidiaries were part of a capital restructuring within the Company to support a planned increase in international business production, which includes directly supporting Group's new Lloyd's of London Syndicate corporate member.

Basis Of Presentation

Basis Of Presentation	6 Months Ended
Basis Of Presentation	Jun. 30, 2017
Basis Of Presentation[Abstract]
Basis Of Presentation	2. BASIS OF PRESENTATION The unaudited consolidated financial statements of the Company for the three and six months ended June 30, 2017 and 2016 include all adjustments, consisting of normal recurring accruals, which, in the opinion of management, are necessary for a fair statement of the results on an interim basis. Certain financial information, which is normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP"), has been omitted since it is not required for interim reporting purposes. The December 31, 2016 consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by GAAP. The results for the three and six months ended June 30, 2017 and 2016 are not necessarily indicative of the results for a full year. These financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the years ended December 31, 2016, 2015 and 2014 included in the Company's most recent Form 10-K filing. The Company consolidates the results of operations and financial position of all voting interest entities ("VOE") in which the Company has a controlling financial interest and all variable interest entities ("VIE") in which the Company is considered to be the primary beneficiary. The consolidation assessment, including the determination as to whether an entity qualifies as a VIE or VOE, depends on the facts and circumstances surrounding each entity. Effective January 1, 2016, the Company adopted Accounting Standards Update 2015-02, "Consolidation (Topic 810) Amendments to the Consolidation Analysis" The amended guidance includes changes in the identification of the primary beneficiary of companies considered to be VIEs. These changes resulted in the Company concluding that Mt. Logan Re is a VIE given it has insufficient equity at risk and that each underlying separate segregated account is likewise a VIE. The Company has concluded that it is the primary beneficiary of Mt. Logan Re, but not of the underlying separate segregated accounts and therefore has deconsolidated these segregated accounts. This change had no impact to the net income or retained earnings of the Company. All significant intercompany accounts and transactions have been eliminated. Certain reclassifications and format changes have been made to prior years' amounts to conform to the 2017 presentation. Application of Recently Issued Accounting Standard Changes. Accounting for Share-Based Compensation. The following table presents certain financial statement line items as previously reported in 2016, the effect of those line items due to treating the cost of shares withheld upon settlement of share-based compensation awards as a financing activity with the Statements of Cash Flows and the line items as currently reported within the financial statements. Consolidated Statements of Cash Flows: Six Months Ended June 30, 2016 Effect of adoption of As previously new accounting reported policy As adopted (Dollars in thousands) CASH FLOWS FROM OPERATING ACTIVITIES: Change in other assets and liabilities, net $ 17,012 $ 9,090 $ 26,102 Net cash provided by (used in) operating activities 674,476 9,090 683,566 CASH FLOWS FROM FINANCING ACTIVITIES: Cost of shares withheld for taxes on settlements of share-based compensation awards - (9,090 ) (9,090 ) Net cash provided by (used in) financing activities (280,512 ) (9,090 ) (289,602 ) Disclosures about Short-Duration Contracts. Disclosures for Investments in Certain Entities that Calculate Net Asset Value Per Share. Debt Issuance Costs. Consolidation.

Investments

Investments	6 Months Ended
Investments	Jun. 30, 2017
Investments [Abstract]
Investments	3. INVESTMENTS The amortized cost, market value and gross unrealized appreciation and depreciation of available for sale, fixed maturity, equity security investments, carried at market value and other-than-temporary impairments ("OTTI") in accumulated other comprehensive income ("AOCI") are as follows for the periods indicated: At June 30, 2017 Amortized Unrealized Unrealized Market OTTI in AOCI (Dollars in thousands) Cost Appreciation Depreciation Value (a) Fixed maturity securities U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,263,173 $ 17,481 $ (4,252 ) $ 1,276,402 $ - Obligations of U.S. states and political subdivisions 679,940 22,970 (6,127 ) 696,783 - Corporate securities 5,607,471 117,600 (30,017 ) 5,695,054 2,612 Asset-backed securities 618,348 1,505 (803 ) 619,050 - Mortgage-backed securities Commercial 290,230 1,701 (2,202 ) 289,729 - Agency residential 2,416,739 15,045 (22,521 ) 2,409,263 - Non-agency residential 551 43 (44 ) 550 - Foreign government securities 1,264,330 50,555 (54,161 ) 1,260,724 175 Foreign corporate securities 2,616,144 108,934 (50,598 ) 2,674,480 952 Total fixed maturity securities $ 14,756,926 $ 335,834 $ (170,725 ) $ 14,922,035 $ 3,739 Equity securities $ 110,724 $ 2,335 $ (5,629 ) $ 107,430 $ - At December 31, 2016 Amortized Unrealized Unrealized Market OTTI in AOCI (Dollars in thousands) Cost Appreciation Depreciation Value (a) Fixed maturity securities U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,115,208 $ 20,410 $ (5,303 ) $ 1,130,315 $ - Obligations of U.S. states and political subdivisions 723,938 18,016 (11,970 ) 729,984 - Corporate securities 5,059,388 131,651 (35,758 ) 5,155,281 7,936 Asset-backed securities 488,824 1,110 (1,286 ) 488,648 - Mortgage-backed securities Commercial 308,827 1,983 (3,878 ) 306,932 - Agency residential 2,415,901 17,478 (27,910 ) 2,405,469 - Non-agency residential 642 44 (45 ) 641 - Foreign government securities 1,254,175 61,226 (57,241 ) 1,258,160 115 Foreign corporate securities 2,565,710 130,714 (64,446 ) 2,631,978 1,184 Total fixed maturity securities $ 13,932,613 $ 382,632 $ (207,837 ) $ 14,107,408 $ 9,235 Equity securities $ 129,553 $ 2,298 $ (12,784 ) $ 119,067 $ - (a) Represents the amount of OTTI recognized in AOCI. Amount includes unrealized gains and losses on impaired securities relating to changes in the value of such securities subsequent to the impairment measurement date The amortized cost and market value of fixed maturity securities are shown in the following table by contractual maturity. Mortgage-backed securities are generally more likely to be prepaid than other fixed maturity securities. As the stated maturity of such securities may not be indicative of actual maturities, the totals for mortgage-backed and asset-backed securities are shown separately. At June 30, 2017 At December 31, 2016 Amortized Market Amortized Market (Dollars in thousands) Cost Value Cost Value Fixed maturity securities – available for sale: Due in one year or less $ 1,139,046 $ 1,142,380 $ 956,945 $ 966,970 Due after one year through five years 7,238,430 7,316,671 6,769,585 6,870,056 Due after five years through ten years 2,109,732 2,141,805 2,020,215 2,052,733 Due after ten years 943,850 1,002,587 971,674 1,015,959 Asset-backed securities 618,348 619,050 488,824 488,648 Mortgage-backed securities: Commercial 290,230 289,729 308,827 306,932 Agency residential 2,416,739 2,409,263 2,415,901 2,405,469 Non-agency residential 551 550 642 641 Total fixed maturity securities $ 14,756,926 $ 14,922,035 $ 13,932,613 $ 14,107,408 The changes in net unrealized appreciation (depreciation) for the Company's investments are derived from the following sources for the periods indicated: Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Increase (decrease) during the period between the market value and cost of investments carried at market value, and deferred taxes thereon: Fixed maturity securities $ (22,246 ) $ 137,383 $ (4,191 ) $ 337,691 Fixed maturity securities, other-than-temporary impairment (994 ) 8,714 (5,495 ) 8,924 Equity securities 1,193 3,005 7,192 7,371 Other invested assets 821 - 1,265 - Change in unrealized appreciation (depreciation), pre-tax (21,226 ) 149,102 (1,229 ) 353,986 Deferred tax benefit (expense) 16,990 (23,938 ) 13,117 (53,410 ) Deferred tax benefit (expense), other-than-temporary impairment 111 (2,256 ) 1,336 (2,325 ) Change in unrealized appreciation (depreciation), net of deferred taxes, included in shareholders' equity $ (4,125 ) $ 122,908 $ 13,224 $ 298,251 The Company frequently reviews all of its fixed maturity, available for sale securities for declines in market value and focuses its attention on securities whose fair value has fallen below 80 The Company's assessments are based on the issuers' current and expected future financial position, timeliness with respect to interest and/or principal payments, speed of repayments and any applicable credit enhancements or breakeven constant default rates on mortgage-backed and asset-backed securities, as well as relevant information provided by rating agencies, investment advisors and analysts. The majority of the Company's equity securities available for sale at market value are primarily comprised of mutual fund investments whose underlying securities consist of fixed maturity securities. When a fund's value reflects an unrealized loss, the Company assesses whether the decline in value is temporary or other-than-temporary. In making its assessment, the Company considers the composition of its portfolios and their related markets, reports received from the portfolio managers and discussions with portfolio managers. If the Company determines that the declines are temporary and it has the ability and intent to continue to hold the investments, then the declines are recorded as unrealized losses in accumulated other comprehensive income (loss). If declines are deemed to be other-than-temporary, then the carrying value of the investment is written down to fair value and recorded in net realized capital gains (losses) in the Company's consolidated statements of operations and comprehensive income (loss). Retrospective adjustments are employed to recalculate the values of asset-backed securities. All of the Company's asset-backed and mortgage-backed securities have a pass-through structure. Each acquisition lot is reviewed to recalculate the effective yield. The recalculated effective yield is used to derive a book value as if the new yield were applied at the time of acquisition. Outstanding principal factors from the time of acquisition to the adjustment date are used to calculate the prepayment history for all applicable securities. Conditional prepayment rates, computed with life to date factor histories and weighted average maturities, are used in the calculation of projected prepayments for pass-through security types. The tables below display the aggregate market value and gross unrealized depreciation of fixed maturity and equity securities, by security type and contractual maturity, in each case subdivided according to length of time that individual securities had been in a continuous unrealized loss position for the periods indicated: Duration of Unrealized Loss at June 30, 2017 By Security Type Less than 12 months Greater than 12 months Total Gross Gross Gross Unrealized Unrealized Unrealized (Dollars in thousands) Market Value Depreciation Market Value Depreciation Market Value Depreciation Fixed maturity securities - available for sale U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 331,934 $ (4,252 ) $ - $ - $ 331,934 $ (4,252 ) Obligations of U.S. states and political subdivisions 157,890 (6,127 ) - - 157,890 (6,127 ) Corporate securities 1,420,422 (20,647 ) 125,215 (9,370 ) 1,545,637 (30,017 ) Asset-backed securities 203,858 (480 ) 8,343 (323 ) 212,201 (803 ) Mortgage-backed securities Commercial 68,190 (1,345 ) 22,332 (857 ) 90,522 (2,202 ) Agency residential 1,606,001 (17,970 ) 192,524 (4,551 ) 1,798,525 (22,521 ) Non-agency residential - - 85 (44 ) 85 (44 ) Foreign government securities 345,411 (13,794 ) 249,983 (40,367 ) 595,394 (54,161 ) Foreign corporate securities 571,564 (10,287 ) 272,842 (40,311 ) 844,406 (50,598 ) Total fixed maturity securities $ 4,705,270 $ (74,902 ) $ 871,324 $ (95,823 ) $ 5,576,594 $ (170,725 ) Equity securities - - 93,034 (5,629 ) 93,034 (5,629 ) Total $ 4,705,270 $ (74,902 ) $ 964,358 $ (101,452 ) $ 5,669,628 $ (176,354 ) Duration of Unrealized Loss at June 30, 2017 By Maturity Less than 12 months Greater than 12 months Total Gross Gross Gross Unrealized Unrealized Unrealized (Dollars in thousands) Market Value Depreciation Market Value Depreciation Market Value Depreciation Fixed maturity securities Due in one year or less $ 350,274 $ (665 ) $ 103,165 $ (20,017 ) $ 453,439 $ (20,682 ) Due in one year through five years 1,558,372 (26,579 ) 473,502 (63,717 ) 2,031,874 (90,296 ) Due in five years through ten years 741,691 (20,588 ) 67,244 (5,691 ) 808,935 (26,279 ) Due after ten years 176,884 (7,275 ) 4,129 (623 ) 181,013 (7,898 ) Asset-backed securities 203,858 (480 ) 8,343 (323 ) 212,201 (803 ) Mortgage-backed securities 1,674,191 (19,315 ) 214,941 (5,452 ) 1,889,132 (24,767 ) Total fixed maturity securities $ 4,705,270 $ (74,902 ) $ 871,324 $ (95,823 ) $ 5,576,594 $ (170,725 ) The aggregate market value and gross unrealized losses related to investments in an unrealized loss position at June 30, 2017 were $ 5,669,628 176,354 1.0 74,902 68,612 95,823 89,724 no The mortgage-backed securities still have excess credit coverage and are current on interest and principal payments. The Company, given the size of its investment portfolio and capital position, does not have the intent to sell these securities; and it is more likely than not that the Company will not have to sell the securities before recovery of cost basis. In addition, all securities currently in an unrealized loss position are current with respect to principal and interest payments. The tables below display the aggregate market value and gross unrealized depreciation of fixed maturity and equity securities, by security type and contractual maturity, in each case subdivided according to length of time that individual securities had been in a continuous unrealized loss position for the periods indicated: Duration of Unrealized Loss at December 31, 2016 By Security Type Less than 12 months Greater than 12 months Total Gross Gross Gross Unrealized Unrealized Unrealized (Dollars in thousands) Market Value Depreciation Market Value Depreciation Market Value Depreciation Fixed maturity securities - available for sale U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 638,740 $ (5,303 ) $ - $ - $ 638,740 $ (5,303 ) Obligations of U.S. states and political subdivisions 221,088 (11,486 ) 564 (484 ) 221,652 (11,970 ) Corporate securities 1,360,743 (24,023 ) 177,153 (11,735 ) 1,537,896 (35,758 ) Asset-backed securities 150,023 (565 ) 18,786 (721 ) 168,809 (1,286 ) Mortgage-backed securities Commercial 143,554 (3,223 ) 7,184 (655 ) 150,738 (3,878 ) Agency residential 1,618,372 (22,461 ) 189,665 (5,449 ) 1,808,037 (27,910 ) Non-agency residential - - 113 (45 ) 113 (45 ) Foreign government securities 360,289 (12,041 ) 236,820 (45,200 ) 597,109 (57,241 ) Foreign corporate securities 687,599 (12,769 ) 295,500 (51,677 ) 983,099 (64,446 ) Total fixed maturity securities $ 5,180,408 $ (91,871 ) $ 925,785 $ (115,966 ) $ 6,106,193 $ (207,837 ) Equity securities - - 105,507 (12,784 ) 105,507 (12,784 ) Total $ 5,180,408 $ (91,871 ) $ 1,031,292 $ (128,750 ) $ 6,211,700 $ (220,621 ) Duration of Unrealized Loss at December 31, 2016 By Maturity Less than 12 months Greater than 12 months Total Gross Gross Gross Unrealized Unrealized Unrealized (Dollars in thousands) Market Value Depreciation Market Value Depreciation Market Value Depreciation Fixed maturity securities Due in one year or less $ 178,281 $ (1,122 ) $ 78,153 $ (14,318 ) $ 256,434 $ (15,440 ) Due in one year through five years 2,123,113 (26,263 ) 538,130 (84,803 ) 2,661,243 (111,066 ) Due in five years through ten years 680,334 (22,555 ) 86,631 (8,754 ) 766,965 (31,309 ) Due after ten years 286,731 (15,682 ) 7,123 (1,221 ) 293,854 (16,903 ) Asset-backed securities 150,023 (565 ) 18,786 (721 ) 168,809 (1,286 ) Mortgage-backed securities 1,761,926 (25,684 ) 196,962 (6,149 ) 1,958,888 (31,833 ) Total fixed maturity securities $ 5,180,408 $ (91,871 ) $ 925,785 $ (115,966 ) $ 6,106,193 $ (207,837 ) The aggregate market value and gross unrealized losses related to investments in an unrealized loss position at December 31, 2016 were $ 6,211,700 220,621 1.1 91,871 85,078 115,966 maturity securities in an unrealized loss position for more than one year related primarily to foreign government securities, foreign corporate securities and domestic corporate securities. Of these unrealized losses $ 112,132 The components of net investment income are presented in the table below for the periods indicated: Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Fixed maturities $ 108,122 $ 102,851 $ 211,367 $ 205,376 Equity securities 8,366 10,923 17,111 22,062 Short-term investments and cash 835 345 1,465 745 Other invested assets Limited partnerships 20,060 23,003 31,058 16,845 Other 2,285 1,151 4,557 301 Gross investment income before adjustments 139,668 138,273 265,558 245,329 Funds held interest income (expense) 1,724 1,740 4,872 4,280 Future policy benefit reserve income (expense) (416 ) (425 ) (735 ) (726 ) Gross investment income 140,976 139,588 269,695 248,883 Investment expenses (6,468 ) (6,851 ) (12,898 ) (13,622 ) Net investment income $ 134,508 $ 132,737 $ 256,797 $ 235,261 The Company records results from limited partnership investments on the equity method of accounting with changes in value reported through net investment income. Due to the timing of receiving financial information from these partnerships, the results are generally reported on a one month or quarter lag. If the Company determines there has been a significant decline in value of a limited partnership during this lag period, a loss will be recorded in the period in which the Company identifies the decline. The Company had contractual commitments to invest up to an additional $ 591,182 The Company's other invested assets at June 30, 2017 and December 31, 2016 included $ 246,973 378,862 The components of net realized capital gains (losses) are presented in the table below for the periods indicated: Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Fixed maturity securities, market value: Other-than-temporary impairments $ (2,475 ) $ (1,470 ) $ (3,703 ) $ (30,263 ) Gains (losses) from sales 13,543 3,329 24,915 (13,582 ) Fixed maturity securities, fair value: Gains (losses) from sales - (1,854 ) - (1,854 ) Gains (losses) from fair value adjustments - 1,571 - 1,339 Equity securities, market value: Gains (losses) from sales - 8 (3,436 ) 65 Equity securities, fair value: Gains (losses) from sales 805 (7,690 ) 5,321 (16,116 ) Gains (losses) from fair value adjustments 13,397 38,764 54,904 18,809 Other invested assets (2 ) - (1 ) - Short-term investments gain (loss) - - (4 ) 1 Total net realized capital gains (losses) $ 25,268 $ 32,658 $ 77,996 $ (41,601 ) The Company recorded as net realized capital gains (losses) in the consolidated statements of operations and comprehensive income (loss) both fair value re-measurements and write-downs in the value of securities deemed to be impaired on an other-than-temporary basis as displayed in the table above. The Company had no other-than-temporary impaired securities where the impairment had both a credit and non-credit component. The proceeds and split between gross gains and losses, from sales of fixed maturity and equity securities, are presented in the table below for the periods indicated: Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Proceeds from sales of fixed maturity securities $ 562,718 $ 272,233 $ 991,209 $ 596,351 Gross gains from sales 17,105 9,094 32,578 17,646 Gross losses from sales (3,563 ) (7,619 ) (7,663 ) (33,082 ) Proceeds from sales of equity securities $ 117,911 $ 337,816 $ 277,028 $ 430,264 Gross gains from sales 3,885 4,893 12,093 6,732 Gross losses from sales (3,080 ) (12,575 ) (10,208 ) (22,783 )

Reserve For Losses, LAE And Fut

Reserve For Losses, LAE And Future Policy Benefit Reserve	6 Months Ended
Reserve For Losses, LAE And Future Policy Benefit Reserve	Jun. 30, 2017
Reserve For Losses LAE And Future Policy Benefit Reserve [Abstract]
Reserve For Losses LAE And Future Policy Benefit Reserve	4. RESERVE FOR LOSSES, LAE AND FUTURE POLICY BENEFIT RESERVE Activity in the reserve for losses and LAE is summarized for the periods indicated: Six Months Ended Twelve Months Ended June 30, December 31, (Dollars in thousands) 2017 2016 Gross reserves at beginning of period $ 10,312,313 $ 9,951,798 Less reinsurance recoverables (990,862 ) (881,503 ) Net reserves at beginning of period 9,321,451 9,070,295 Incurred related to: Current year 1,632,487 3,434,964 Prior years (424 ) (295,335 ) Total incurred losses and LAE 1,632,063 3,139,629 Paid related to: Current year 397,295 745,642 Prior years 1,064,727 2,042,972 Total paid losses and LAE 1,462,022 2,788,614 Foreign exchange/translation adjustment 69,358 (99,859 ) Net reserves at end of period 9,560,850 9,321,451 Plus reinsurance recoverables 914,855 990,862 Gross reserves at end of period $ 10,475,705 $ 10,312,313 Incurred prior years' reserves decreased by $424 thousand and $295,335 thousand for the six months ended June 30, 2017 and for the twelve months ended December 31, 2016, respectively. The decrease for the twelve months ended December 31, 2016 was attributable to favorable development in the reinsurance segments of $ 468,749 53,909 60,000 16,720 43,280 173,414

Derivatives

Derivatives	6 Months Ended
Derivatives	Jun. 30, 2017
Derivatives [Abstract]
Derivatives	5. DERIVATIVES The Company sold seven two One no The Company has five 3 zero 3 394,610 2,423.41 no The Company has one 20 zero 3 38,282 7,312.72 no At June 30, 2017 and December 31, 2016, the fair value for these equity put options was $ 18,662 22,059 The fair value of the equity index put options can be found in the Company's consolidated balance sheets as follows: (Dollars in thousands) Derivatives not designated as Location of fair value At At hedging instruments in balance sheets June 30, 2017 December 31, 2016 Equity index put option contracts Equity index put option liability $ 18,662 $ 22,059 Total $ 18,662 $ 22,059 The change in fair value of the equity index put option contracts can be found in the Company's statement of operations and comprehensive income (loss) as follows: (Dollars in thousands) For the Three Months Ended For the Six Months Ended Derivatives not designated as Location of gain (loss) in statements of June 30, June 30, hedging instruments operations and comprehensive income (loss) 2017 2016 2017 2016 Equity index put option contracts Net derivative gain (loss) $ 766 $ 1,996 $ 3,396 $ (1,024 ) Total $ 766 $ 1,996 $ 3,396 $ (1,024 )

Fair Value

Fair Value	6 Months Ended
Fair Value	Jun. 30, 2017
Fair Value [Abstract]
Fair Value	6. FAIR VALUE GAAP guidance regarding fair value measurements address how companies should measure fair value when they are required to use fair value measures for recognition or disclosure purposes under GAAP and provides a common definition of fair value to be used throughout GAAP. It defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly fashion between market participants at the measurement date. In addition, it establishes a three-level valuation hierarchy for the disclosure of fair value measurements. The valuation hierarchy is based on the transparency of inputs to the valuation of an asset or liability. The level in the hierarchy within which a given fair value measurement falls is determined based on the lowest level input that is significant to the measurement, with Level 1 being the highest priority and Level 3 being the lowest priority. The levels in the hierarchy are defined as follows: Level 1: Inputs to the valuation methodology are observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in an active market; Level 2: Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument; Level 3: Inputs to the valuation methodology are unobservable and significant to the fair value measurement. The Company's fixed maturity and equity securities are primarily managed by third party investment asset managers. The investment asset managers obtain prices from nationally recognized pricing services. These services seek to utilize market data and observations in their evaluation process. They use pricing applications that vary by asset class and incorporate available market information and when fixed maturity securities do not trade on a daily basis the services will apply available information through processes such as benchmark curves, benchmarking of like securities, sector groupings and matrix pricing. In addition, they use model processes, such as the Option Adjusted Spread model to develop prepayment and interest rate scenarios for securities that have prepayment features. In limited instances where prices are not provided by pricing services or in rare instances when a manager may not agree with the pricing service, price quotes on a non-binding basis are obtained from investment brokers. The investment asset managers do not make any changes to prices received from either the pricing services or the investment brokers. In addition, the investment asset managers have procedures in place to review the reasonableness of the prices from the service providers and may request verification of the prices. In addition, the Company continually performs analytical reviews of price changes and tests the prices on a random basis to an independent pricing source. No material variances were noted during these price validation procedures. In limited situations, where financial markets are inactive or illiquid, the Company may use its own assumptions about future cash flows and risk-adjusted discount rates to determine fair value. Due to the unavailability of prices for forty-seven private placement securities, the investment manager's valuation committee valued the forty-six 89,291 one 51,965 forty-two 86,536 The Company internally manages a public equity portfolio which had a fair value at June 30, 2017 and December 31, 2016 of $ 306,445 256,041 Equity securities denominated in U.S. currency with quoted prices in active markets for identical assets are categorized as level 1 since the quoted prices are directly observable. Equity securities traded on foreign exchanges are categorized as level 2 due to the added input of a foreign exchange conversion rate to determine fair or market value. The Company uses foreign currency exchange rates published by nationally recognized sources. All categories of fixed maturity securities listed in the tables below are generally categorized as level 2, since a particular security may not have traded but the pricing services are able to use valuation models with observable market inputs such as interest rate yield curves and prices for similar fixed maturity securities in terms of issuer, maturity and seniority. For foreign government securities and foreign corporate securities, the fair values provided by the third party pricing services in local currencies, and where applicable, are converted to U.S. dollars using currency exchange rates from nationally recognized sources. The fixed maturities with fair values categorized as level 3 result when prices are not available from the nationally recognized pricing services. The asset managers will then obtain non-binding price quotes for the securities from brokers. The single broker quotes are provided by market makers or broker-dealers who are recognized as market participants in the markets in which they are providing the quotes. The prices received from brokers are reviewed for reasonableness by the third party asset managers and the Company. If the broker quotes are for foreign denominated securities, the quotes are converted to U.S. dollars using currency exchange rates from nationally recognized sources. In limited circumstances when broker prices are not available for private placements, the Company will value the securities using comparable market information. The composition and valuation inputs for the presented fixed maturities categories are as follows: · U.S. Treasury securities and obligations of U.S. government agencies and corporations are primarily comprised of U.S. Treasury bonds and the fair value is based on observable market inputs such as quoted prices, reported trades, quoted prices for similar issuances or benchmark yields; · Obligations of U.S. states and political subdivisions are comprised of state and municipal bond issuances and the fair values are based on observable market inputs such as quoted market prices, quoted prices for similar securities, benchmark yields and credit spreads; · Corporate securities are primarily comprised of U.S. corporate and public utility bond issuances and the fair values are based on observable market inputs such as quoted market prices, quoted prices for similar securities, benchmark yields and credit spreads; · Asset-backed and mortgage-backed securities fair values are based on observable inputs such as quoted prices, reported trades, quoted prices for similar issuances or benchmark yields and cash flow models using observable inputs such as prepayment speeds, collateral performance and default spreads; · Foreign government securities are comprised of global non-U.S. sovereign bond issuances and the fair values are based on observable market inputs such as quoted market prices, quoted prices for similar securities and models with observable inputs such as benchmark yields and credit spreads and then, where applicable, converted to U.S. dollars using an exchange rate from a nationally recognized source; · Foreign corporate securities are comprised of global non-U.S. corporate bond issuances and the fair values are based on observable market inputs such as quoted market prices, quoted prices for similar securities and models with observable inputs such as benchmark yields and credit spreads and then, where applicable, converted to U.S. dollars using an exchange rate from a nationally recognized source. The Company sold seven two The Company's liability for equity index put options is categorized as level 3 since there is no active market for these seven long dated equity put options. The fair values for these options are calculated by the Company using an industry accepted pricing model, Black-Scholes. The model inputs and assumptions are: risk free interest rates, equity market indexes values, volatilities and dividend yields and duration. The model results are then adjusted for the Company's credit default swap rate. All of these inputs and assumptions are updated quarterly. One of the option contacts is in British Pound Sterling so the fair value for this contract is converted to U.S. dollars using an exchange rate from a nationally recognized source. The following table presents the fair value measurement levels for all assets and liabilities, which the Company has recorded at fair value (fair and market value) as of the periods indicated: Fair Value Measurement Using: Quoted Prices in Active Significant Markets for Other Significant Identical Observable Unobservable Assets Inputs Inputs (Dollars in thousands) June 30, 2017 (Level 1) (Level 2) (Level 3) Assets: Fixed maturities, market value U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,276,402 $ - $ 1,276,402 $ - Obligations of U.S. States and political subdivisions 696,783 - 696,783 - Corporate securities 5,695,054 - 5,556,949 138,105 Asset-backed securities 619,050 - 619,050 - Mortgage-backed securities Commercial 289,729 - 289,729 - Agency residential 2,409,263 - 2,409,263 - Non-agency residential 550 - 550 - Foreign government securities 1,260,724 - 1,260,724 - Foreign corporate securities 2,674,480 - 2,671,329 3,151 Total fixed maturities, market value 14,922,035 - 14,780,779 141,256 Equity securities, market value 107,430 93,034 14,396 - Equity securities, fair value 1,071,390 1,030,941 40,449 - Liabilities: Equity index put option contracts $ 18,662 $ - $ - $ 18,662 There were no The following table presents the fair value measurement levels for all assets and liabilities, which the Company has recorded at fair value (fair and market value) as of the periods indicated: Fair Value Measurement Using: Quoted Prices in Active Significant Markets for Other Significant Identical Observable Unobservable Assets Inputs Inputs (Dollars in thousands) December 31, 2016 (Level 1) (Level 2) (Level 3) Assets: Fixed maturities, market value U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,130,315 $ - $ 1,130,315 $ - Obligations of U.S. States and political subdivisions 729,984 - 729,984 - Corporate securities 5,155,281 - 5,090,084 65,197 Asset-backed securities 488,648 - 488,648 - Mortgage-backed securities Commercial 306,932 - 306,932 - Agency residential 2,405,469 - 2,405,469 - Non-agency residential 641 - 641 - Foreign government securities 1,258,160 - 1,258,160 - Foreign corporate securities 2,631,978 - 2,629,440 2,538 Total fixed maturities, market value 14,107,408 - 14,039,673 67,735 Equity securities, market value 119,067 105,507 13,560 - Equity securities, fair value 1,010,085 949,523 60,562 - Liabilities: Equity index put option contracts $ 22,059 $ - $ - $ 22,059 In addition, $ 52,139 18,801 The following tables present the activity under Level 3, fair value measurements using significant unobservable inputs by asset type, for the periods indicated: Three Months Ended June 30, 2017 Six Months Ended June 30, 2017 Corporate Foreign Corporate Foreign (Dollars in thousands) Securities Corporate Total Securities Corporate Total Beginning balance $ 84,322 $ 2,802 $ 87,124 $ 65,197 $ 2,538 $ 67,735 Total gains or (losses) (realized/unrealized) Included in earnings 711 128 839 925 104 1,029 Included in other comprehensive income (loss) 172 - 172 143 - 143 Purchases, issuances and settlements 52,900 221 53,121 71,840 509 72,349 Transfers in and/or (out) of Level 3 - - - - - - Ending balance $ 138,105 $ 3,151 $ 141,256 $ 138,105 $ 3,151 $ 141,256 The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date $ - $ - $ - $ - $ - $ - (Some amounts may not reconcile due to rounding.) Three Months Ended June 30, 2016 Six Months Ended June 30, 2016 Corporate Foreign Corporate Foreign (Dollars in thousands) Securities Corporate Total Securities Corporate Total Beginning balance $ 15,706 $ 596 $ 16,302 $ 3,933 $ 1,593 $ 5,526 Total gains or (losses) (realized/unrealized) Included in earnings (18 ) - (18 ) (10 ) (997 ) (1,007 ) Included in other comprehensive income (loss) (27 ) 1,425 1,398 (33 ) 1,425 1,392 Purchases, issuances and settlements 16,749 - 16,749 28,520 - 28,520 Transfers in and/or (out) of Level 3 - - - - - - Ending balance $ 32,410 $ 2,021 $ 34,431 $ 32,410 $ 2,021 $ 34,431 The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date $ - $ - $ - $ - $ (997 ) $ (997 ) (Some amounts may not reconcile due to rounding.) The following table presents the activity under Level 3, fair value measurements using significant unobservable inputs for equity index put option contracts, for the periods indicated: Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Liabilities: Balance, beginning of period $ 19,429 $ 43,725 $ 22,059 $ 40,705 Total (gains) or losses (realized/unrealized) Included in earnings (766 ) (1,996 ) (3,396 ) 1,024 Included in other comprehensive income (loss) - - - - Purchases, issuances and settlements - - - - Transfers in and/or (out) of Level 3 - - - - Balance, end of period $ 18,662 $ 41,729 $ 18,662 $ 41,729 The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to liabilities still held at the reporting date $ - $ - $ - $ - (Some amounts may not reconcile due to rounding.)

Earnings Per Common Share

Earnings Per Common Share	6 Months Ended
Earnings Per Common Share	Jun. 30, 2017
Earnings Per Common Share [Abstract]
Earnings Per Common Share	7. EARNINGS PER COMMON SHARE Basic earnings per share are calculated by dividing net income by the weighted average number of common shares outstanding. Diluted earnings per share reflect the potential dilution that would occur if options granted under various share-based compensation plans were exercised resulting in the issuance of common shares that would participate in the earnings of the entity. Net income (loss) per common share has been computed as per below, based upon weighted average common basic and dilutive shares outstanding. Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands, except per share amounts) 2017 2016 2017 2016 Net income (loss) per share: Numerator Net income (loss) $ 245,674 $ 155,692 $ 537,317 $ 327,378 Less: dividends declared-common shares and nonvested common shares (51,304 ) (48,132 ) (102,585 ) (96,838 ) Undistributed earnings 194,370 107,561 434,731 230,540 Percentage allocated to common shareholders (1) 98.9 % 98.9 % 98.9 % 98.9 % 192,279 106,407 430,035 228,102 Add: dividends declared-common shareholders 50,790 47,643 101,543 95,853 Numerator for basic and diluted earnings per common share $ 243,068 $ 154,050 $ 531,577 $ 323,955 Denominator Denominator for basic earnings per weighted-average common shares 40,624 41,653 40,577 41,891 Effect of dilutive securities: Options 250 296 259 315 Denominator for diluted earnings per adjusted weighted-average common shares 40,874 41,949 40,836 42,206 Per common share net income (loss) Basic $ 5.98 $ 3.70 $ 13.10 $ 7.73 Diluted $ 5.95 $ 3.67 $ 13.02 $ 7.68 (1) Basic weighted-average common shares outstanding 40,624 41,653 40,577 41,891 Basic weighted-average common shares outstanding and nonvested common shares expected to vest 41,066 42,104 41,020 42,338 Percentage allocated to common shareholders 98.9 % 98.9 % 98.9 % 98.9 % (Some amounts may not reconcile due to rounding.) There were no All outstanding options expire on or between February 20, 2018 and September 19, 2022.

Commitments And Contingencies

Commitments And Contingencies	6 Months Ended
Commitments And Contingencies	Jun. 30, 2017
Commitments And Contingencies [Abstract]
Commitments And Contingencies	8. COMMITMENTS AND CONTINGENCIES In the ordinary course of business, the Company is involved in lawsuits, arbitrations and other formal and informal dispute resolution procedures, the outcomes of which will determine the Company's rights and obligations under insurance and reinsurance agreements. In some disputes, the Company seeks to enforce its rights under an agreement or to collect funds owing to it. In other matters, the Company is resisting attempts by others to collect funds or enforce alleged rights. These disputes arise from time to time and are ultimately resolved through both informal and formal means, including negotiated resolution, arbitration and litigation. In all such matters, the Company believes that its positions are legally and commercially reasonable. The Company considers the statuses of these proceedings when determining its reserves for unpaid loss and loss adjustment expenses. Aside from litigation and arbitrations related to these insurance and reinsurance agreements, the Company is not a party to any other material litigation or arbitration. The Company has entered into separate annuity agreements with The Prudential Insurance of America ("The Prudential") and an additional unaffiliated life insurance company in which the Company has either purchased annuity contracts or become the assignee of annuity proceeds that are meant to settle claim payment obligations in the future. In both instances, the Company would become contingently liable if either The Prudential or the unaffiliated life insurance company were unable to make payments related to the respective annuity contract. The table below presents the estimated cost to replace all such annuities for which the Company was contingently liable for the periods indicated: At June 30, At December 31, (Dollars in thousands) 2017 2016 The Prudential $ 146,923 $ 146,507 Unaffiliated life insurance company 33,107 33,860

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	6 Months Ended
Other Comprehensive Income (Loss)	Jun. 30, 2017
Other Comprehensive Income (Loss) [Abstract]
Other Comprehensive Income (Loss)	9. OTHER COMPREHENSIVE INCOME (LOSS) The following tables present the components of comprehensive income (loss) in the consolidated statements of operations for the periods indicated: Three Months Ended June 30, 2017 Six Months Ended June 30, 2017 (Dollars in thousands) Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Unrealized appreciation (depreciation) ("URA(D)") on securities - temporary $ (9,165 ) $ 14,916 $ 5,751 $ 22,041 $ 6,534 $ 28,575 URA(D) on securities - OTTI (994 ) 111 (883 ) (5,495 ) 1,336 (4,159 ) Reclassification of net realized losses (gains) included in net income (loss) (11,067 ) 2,074 (8,993 ) (17,775 ) 6,583 (11,192 ) Foreign currency translation adjustments 38,560 (2,893 ) 35,667 52,373 (4,813 ) 47,560 Benefit plan actuarial net gain (loss) - - - - - - Reclassification of benefit plan liability amortization included in net income (loss) 3,083 (1,079 ) 2,004 6,166 (2,158 ) 4,008 Total other comprehensive income (loss) $ 20,417 $ 13,129 $ 33,546 $ 57,310 $ 7,482 $ 64,792 Three Months Ended June 30, 2016 Six Months Ended June 30, 2016 (Dollars in thousands) Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Unrealized appreciation (depreciation) ("URA(D)") on securities - temporary $ 142,255 $ (24,357 ) $ 117,898 $ 301,283 $ (40,564 ) $ 260,719 URA(D) on securities - OTTI 8,714 (2,256 ) 6,458 8,924 (2,325 ) 6,599 Reclassification of net realized losses (gains) included in net income (loss) (1,867 ) 419 (1,448 ) 43,779 (12,846 ) 30,933 Foreign currency translation adjustments 13,389 (8,339 ) 5,050 31,208 (16,385 ) 14,823 Benefit plan actuarial net gain (loss) - - - - - - Reclassification of benefit plan liability amortization included in net income (loss) 2,063 (722 ) 1,341 4,125 (1,444 ) 2,681 Total other comprehensive income (loss) $ 164,554 $ (35,255 ) $ 129,299 $ 389,319 $ (73,564 ) $ 315,755 The following table presents details of the amounts reclassified from AOCI for the periods indicated: Three Months Ended Six Months Ended June 30, June 30, Affected line item within the statements of AOCI component 2017 2016 2017 2016 operations and comprehensive income (loss) (Dollars in thousands) URA(D) on securities $ (11,067 ) $ (1,867 ) $ (17,775 ) $ 43,779 Other net realized capital gains (losses) 2,074 419 6,583 (12,846 ) Income tax expense (benefit) $ (8,993 ) $ (1,448 ) $ (11,192 ) $ 30,933 Net income (loss) Benefit plan net gain (loss) $ 3,083 $ 2,063 $ 6,166 $ 4,125 Other underwriting expenses (1,079 ) (722 ) (2,158 ) (1,444 ) Income tax expense (benefit) $ 2,004 $ 1,341 $ 4,008 $ 2,681 Net income (loss) The following table presents the components of accumulated other comprehensive income (loss), net of tax, in the consolidated balance sheets for the periods indicated: Six Months Ended Twelve Months Ended June 30, December 31, (Dollars in thousands) 2017 2016 Beginning balance of URA (D) on securities $ 115,558 $ 42,811 Current period change in URA (D) of investments - temporary 17,383 66,802 Current period change in URA (D) of investments - non-credit OTTI (4,159 ) 5,945 Ending balance of URA (D) on securities 128,782 115,558 Beginning balance of foreign currency translation adjustments (266,818 ) (211,477 ) Current period change in foreign currency translation adjustments 47,560 (55,341 ) Ending balance of foreign currency translation adjustments (219,258 ) (266,818 ) Beginning balance of benefit plan net gain (loss) (65,504 ) (63,089 ) Current period change in benefit plan net gain (loss) 4,008 (2,415 ) Ending balance of benefit plan net gain (loss) (61,496 ) (65,504 ) Ending balance of accumulated other comprehensive income (loss) $ (151,972 ) $ (216,764 )

Credit Facilities

Credit Facilities	6 Months Ended
Credit Facilities	Jun. 30, 2017
Credit Facilities [Abstract]
Credit Facilities	10. CREDIT FACILITIES The Company has two 1,000,000 Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Credit facility interest and fees incurred $ 106 $ 213 $ 210 $ 583 The terms and outstanding amounts for each facility are discussed below: Group Credit Facility Effective May 26, 2016, Group, Everest Reinsurance (Bermuda), Ltd. ("Bermuda Re") and Everest International Reinsurance, Ltd. ("Everest International"), both direct subsidiaries of Group, entered into a five year, $ 800,000 800,000 two 200,000 0.5 1.0 600,000 The Group Credit Facility requires Group to maintain a debt to capital ratio of not greater than 0.35 5,370,979 25 25 5,721,181 (Dollars in thousands) At June 30, 2017 At December 31, 2016 Bank Commitment In Use Date of Expiry Commitment In Use Date of Expiry Wells Fargo Bank Group Credit Facility Tranche One $ 200,000 $ - $ 200,000 $ - Tranche Two 600,000 471,219 12/31/2017 600,000 478,233 12/31/2017 Total Wells Fargo Bank Group Credit Facility $ 800,000 $ 471,219 $ 800,000 $ 478,233 Bermuda Re Letter of Credit Facility Effective December 30, 2016, Bermuda Re renewed its letter of credit issuance facility with Citibank N.A. referred to as the "Bermuda Re Letter of Credit Facility", which commitment is reconfirmed annually with updated fees. The current renewal of the Bermuda Re Letter of Credit Facility provides for the issuance of up to $ 200,000 0.35 0.45 60 0.15 The following table summarizes the outstanding letters of credit for the periods indicated: (Dollars in thousands) At June 30, 2017 At December 31, 2016 Bank Commitment In Use Date of Expiry Commitment In Use Date of Expiry Citibank Bilateral Letter of Credit Agreement $ 200,000 $ 3,672 11/24/2017 $ 200,000 $ 4,058 2/28/2017 67,672 12/31/2017 3,672 11/24/2017 3,297 2/28/2018 69,404 12/31/2017 281 8/30/2018 269 8/30/2018 3,780 12/31/2018 1,163 12/31/2018 100,632 6/30/2021 93,180 12/30/2020 Total Citibank Bilateral Agreement $ 200,000 $ 179,334 $ 200,000 $ 171,746 Everest International Credit Facility Effective November 9, 2016 four 145,000 0.1 0.35 The Everest International Credit Facility requires Group to maintain a debt to capital ratio of not greater than 0.35 5,326,009 70 25 25 5,721,181 The following table summarizes the outstanding letters of credit for the periods indicated: (Dollars in thousands) At June 30, 2017 At December 31, 2016 Bank Commitment In Use Date of Expiry Commitment In Use Date of Expiry Lloyds Bank plc £ 145,000 £ 140,964 12/31/2020 £ 140,000 £ 130,606 12/31/2019 - - - - Total Lloyds Bank plc Credit Facility £ 145,000 £ 140,964 £ 140,000 £ 130,606

Collateralized Reinsurance And

Collateralized Reinsurance And Trust Agreements	6 Months Ended
Collateralized Reinsurance And Trust Agreements	Jun. 30, 2017
Collateralized Reinsurance And Trust Agreements [Abstract]
Collateralized Reinsurance And Trust Agreements	11. COLLATERALIZED REINSURANCE AND TRUST AGREEMENTS Certain subsidiaries of Group have established trust agreements, which effectively use the Company's investments as collateral, as security for assumed losses payable to certain non-affiliated ceding companies. At June 30, 2017, the total amount on deposit in trust accounts was $ 774,703 The Company reinsures some of its catastrophe exposures with the segregated accounts of Mt. Logan Re. Mt. Logan Re is a Class 3 insurer registered in Bermuda effective February 27, 2013 under The Segregated Accounts Companies Act 2000 and 100 The following table summarizes the premiums and losses that are ceded by the Company to Mt. Logan Re segregated accounts and assumed by the Company from Mt. Logan Re segregated accounts. Three Months Ended Six Months Ended June 30, June 30, Mt. Logan Re Segregated Accounts 2017 2016 2017 2016 (Dollars in thousands) Ceded written premiums 42,728 36,178 96,946 92,846 Ceded earned premiums 57,886 47,945 98,483 90,849 Ceded losses and LAE 24,812 18,973 44,397 29,734 Assumed written premiums 3,763 3,073 6,495 6,634 Assumed earned premiums 3,763 3,073 6,495 6,634 Assumed losses and LAE - - - - Each segregated account is permitted to assume net risk exposures equal to its amount of preferred shares and posted collateral, which in the aggregate was $ 941,836 932,243 55,850 55,536 On April 24, 2014, the Company entered into two 250,000 200,000 On November 18, 2014, the Company entered into a collateralized reinsurance agreement with Kilimanjaro Re to provide the Company with catastrophe reinsurance coverage. This agreement is a multi-year reinsurance contract which covers specified earthquake events. The agreement provides up to $ 500,000 On December 1, 2015 the Company entered into two 300,000 325,000 On April 13, 2017 the Company entered into six three four 225,000 400,000 325,000 three five 50,000 75,000 175,000 Kilimanjaro has financed the various property catastrophe reinsurance coverages by issuing catastrophe bonds to unrelated, external investors. On April 24, 2014, Kilimanjaro issued $ 450,000 500,000 625,000 950,000 300,000

Senior Notes

Senior Notes	6 Months Ended
Senior Notes	Jun. 30, 2017
Senior Notes [Abstract]
Senior Notes	12. SENIOR NOTES The table below displays Holdings' outstanding senior notes. Market value is based on quoted market prices, but due to limited trading activity, these senior notes are considered Level 2 in the fair value hierarchy. June 30, 2017 December 31, 2016 Consolidated Balance Consolidated Balance (Dollars in thousands) Date Issued Date Due Principal Amounts Sheet Amount Market Value Sheet Amount Market Value 4.868 06/05/2014 06/01/2044 400,000 $ 396,774 $ 421,764 $ 396,714 $ 383,612 On June 5, 2014, Holdings issued $400,000 thousand of 30 Interest expense incurred in connection with these senior notes is as follows for the periods indicated: Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Interest expense incurred $ 4,868 $ 4,868 $ 9,736 $ 9,736

Long Term Subordinated Notes

Long Term Subordinated Notes	6 Months Ended
Long Term Subordinated Notes	Jun. 30, 2017
Long Term Subordinated Notes [Abstract]
Long Term Subordinated Notes	13. LONG TERM SUBORDINATED NOTES The table below displays Holdings' outstanding fixed to floating rate long term subordinated notes. Market value is based on quoted market prices, but due to limited trading activity, these subordinated notes are considered Level 2 in the fair value hierarchy. Maturity Date June 30, 2017 December 31, 2016 Original Consolidated Balance Consolidated Balance (Dollars in thousands) Date Issued Principal Amount Scheduled Final Sheet Amount Market Value Sheet Amount Market Value 6.6 04/26/2007 $ 400,000 05/15/2037 05/01/2067 $ 236,511 $ 223,053 $ 236,462 $ 204,636 During the fixed rate interest period from May 3, 2007 May 14, 2017 6.6 November 15, 2007 3.56678 Holdings may redeem the long term subordinated notes on or after May 15, 2017, in whole or in part at 100 May 1, 2047 5.40 October 15, 2014 4.868 June 1, 2044 On March 19, 2009, Group announced the commencement of a cash tender offer for any and all of the 6.60% fixed to floating rate long term subordinated notes. Upon expiration of the tender offer, the Company had reduced its outstanding debt by $ 161,441 Interest expense incurred in connection with these long term subordinated notes is as follows for the periods indicated: Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Interest expense incurred $ 3,033 $ 3,937 $ 6,970 $ 7,874

Segment Reporting

Segment Reporting	6 Months Ended
Segment Reporting	Jun. 30, 2017
Segment Reporting [Abstract]
Segment Reporting	14. SEGMENT REPORTING The U.S. Reinsurance operation writes property and casualty reinsurance and specialty lines of business, including Marine, Aviation, Surety and Accident and Health ("A&H") business, on both a treaty and facultative basis, through reinsurance brokers, as well as directly with ceding companies primarily within the U.S. The International operation writes non-U.S. property and casualty reinsurance through Everest Re's branches in Canada and Singapore and through offices in Brazil, Miami and New Jersey. The Bermuda operation provides reinsurance and insurance to worldwide property and casualty markets through brokers and directly with ceding companies from its Bermuda office and reinsurance to the United Kingdom and European markets through its UK branch and Ireland Re. The Insurance operation writes property and casualty insurance directly and through brokers, surplus lines brokers and general agents within the U.S. and Canada. These segments are managed independently, but conform with corporate guidelines with respect to pricing, risk management, control of aggregate catastrophe exposures, capital, investments and support operations. Management generally monitors and evaluates the financial performance of these operating segments based upon their underwriting results. Underwriting results include earned premium less losses and loss adjustment expenses ("LAE") incurred, commission and brokerage expenses and other underwriting expenses. We measure our underwriting results using ratios, in particular loss, commission and brokerage and other underwriting expense ratios, which, respectively, divide incurred losses, commissions and brokerage and other underwriting expenses by premiums earned. For inter-affiliate reinsurance and business written through the Lloyd's Syndicate, business is generally reported within the segment in which the business was first produced, consistent with how the business is managed. The Company does not maintain separate balance sheet data for its operating segments. Accordingly, the Company does not review and evaluate the financial results of its operating segments based upon balance sheet data. The following tables present the underwriting results for the operating segments for the periods indicated: Three Months Ended Six Months Ended U.S. Reinsurance June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Gross written premiums $ 474,993 $ 405,530 $ 1,053,951 $ 942,235 Net written premiums 385,267 341,616 902,636 812,307 Premiums earned $ 478,494 $ 473,273 $ 960,018 $ 959,814 Incurred losses and LAE 267,621 219,590 529,687 456,034 Commission and brokerage 112,423 120,624 214,781 237,941 Other underwriting expenses 14,278 12,132 28,529 25,591 Underwriting gain (loss) $ 84,172 $ 120,927 $ 187,021 $ 240,248 Three Months Ended Six Months Ended International June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Gross written premiums $ 319,786 $ 340,625 $ 586,203 $ 576,216 Net written premiums 272,369 281,201 518,031 483,701 Premiums earned $ 263,816 $ 290,601 $ 535,397 $ 541,051 Incurred losses and LAE 172,488 261,864 331,989 409,399 Commission and brokerage 64,847 66,678 130,997 130,964 Other underwriting expenses 9,814 7,969 19,294 15,792 Underwriting gain (loss) $ 16,667 $ (45,910 ) $ 53,117 $ (15,104 ) Three Months Ended Six Months Ended Bermuda June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Gross written premiums $ 237,570 $ 161,930 $ 558,692 $ 366,662 Net written premiums 217,814 148,441 522,846 332,755 Premiums earned $ 263,457 $ 200,277 $ 498,563 $ 394,705 Incurred losses and LAE 165,305 109,829 293,737 221,350 Commission and brokerage 63,486 59,886 121,909 109,808 Other underwriting expenses 9,022 8,320 18,502 17,505 Underwriting gain (loss) $ 25,644 $ 22,242 $ 64,415 $ 46,042 Three Months Ended Six Months Ended Insurance June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Gross written premiums $ 569,300 $ 455,266 $ 1,003,747 $ 831,426 Net written premiums 463,683 383,695 809,434 707,647 Premiums earned $ 363,914 $ 324,709 $ 687,800 $ 612,157 Incurred losses and LAE 255,861 266,533 476,650 471,782 Commission and brokerage 59,200 48,314 114,538 91,795 Other underwriting expenses 45,755 43,656 88,431 85,299 Underwriting gain (loss) $ 3,098 $ (33,794 ) $ 8,181 $ (36,719 ) The following table reconciles the underwriting results for the operating segments to income before taxes as reported in the consolidated statements of operations and comprehensive income (loss) for the periods indicated: Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Underwriting gain (loss) $ 129,581 $ 63,465 $ 312,734 $ 234,467 Net investment income 134,508 132,737 256,797 235,261 Net realized capital gains (losses) 25,268 32,658 77,996 (41,601 ) Net derivative gain (loss) 766 1,996 3,396 (1,024 ) Corporate expenses (6,919 ) (7,117 ) (15,376 ) (15,003 ) Interest, fee and bond issue cost amortization expense (8,059 ) (9,073 ) (17,023 ) (18,301 ) Other income (expense) 388 (28,367 ) (4,578 ) (30,433 ) Income (loss) before taxes $ 275,533 $ 186,299 $ 613,946 $ 363,366 The Company produces business in the U.S., Bermuda and internationally. The net income deriving from and assets residing in the individual foreign countries in which the Company writes business are not identifiable in the Company's financial records. Based on gross written premium, the table below presents the largest country, other than the U.S., in which the Company writes business, for the periods indicated: Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 United Kingdom gross written premium $ 204,965 $ 146,578 $ 375,785 $ 329,208 No other country represented more than 5

Share-Based Compensation Plans

Share-Based Compensation Plans	6 Months Ended
Share-Based Compensation Plans	Jun. 30, 2017
Share-Based Compensation Plans [Abstract]
Share-Based Compensation Plans	15. SHARE-BASED COMPENSATION PLANS For the three months ended June 30, 2017, share-based compensation awards granted were 2,540 May 17, 2017 242.225

Retirement Benefits

Retirement Benefits	6 Months Ended
Retirement Benefits	Jun. 30, 2017
Retirement Benefits [Abstract]
Retirement Benefits	16. RETIREMENT BENEFITS The Company maintains both qualified and non-qualified defined benefit pension plans and a retiree health plan for its U.S. employees employed prior to April 1, 2010. Net periodic benefit cost for U.S. employees included the following components for the periods indicated: Pension Benefits Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Service cost $ 3,299 $ 2,896 $ 6,598 $ 5,793 Interest cost 2,276 2,361 4,552 4,722 Expected return on plan assets (3,154 ) (2,484 ) (6,309 ) (4,968 ) Amortization of net (income) loss 3,041 2,014 6,081 4,028 Net periodic benefit cost $ 5,461 $ 4,787 $ 10,921 $ 9,575 Other Benefits Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Service cost $ 441 $ 438 $ 881 $ 876 Interest cost 249 296 498 592 Amortization of prior service cost (33 ) - (66 ) - Amortization of net (income) loss 75 48 151 96 Net periodic benefit cost $ 732 $ 782 $ 1,464 $ 1,564 (Some amounts may not reconcile due to rounding.) The Company did not make any contributions to the qualified pension benefit plan for the six

Income Taxes

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2017
Income Taxes [Abstract]
Income Taxes	17. INCOME TAXES The Company is domiciled in Bermuda and has significant subsidiaries and/or branches in Canada, Ireland, Singapore, the United Kingdom, and the United States. The Company's Bermuda domiciled subsidiaries are exempt from income taxation under Bermuda law until 2035. Pre-tax income generated by Group's non-Bermuda subsidiaries and the UK branch of Bermuda is subject to applicable federal, foreign, state and local taxes on corporations. Company subsidiaries domiciled in the US as well as the Canadian and Singapore branches of Everest Re generate US pre-tax income (loss). Foreign domiciled subsidiaries, including the UK branch of Bermuda Re, generate non-US pre-tax income (loss). Fluctuations in US and non-US pre-tax income (loss) primarily result from the impact of catastrophe losses and realized investment gains (losses). For interim reporting periods, the company is generally required to use the annualized effective tax rate ("AETR") method, as prescribed by ASC 740-270, Interim Reporting, to calculate its income tax provision. Under this method, the AETR is applied to the interim year-to-date pre-tax income to determine the income tax expense or benefit for the year-to-date period. The income tax expense or benefit for a quarter represents the difference between the year-to-date income tax expense or benefit for the current year-to-date period less such amount for the immediately preceding year-to-date period. Management considers the impact of all known events in its estimation of the Company's annual pre-tax income and AETR.

Dispositions

Dispositions	6 Months Ended
Dispositions	Jun. 30, 2017
Dispositions [Abstract]
Dispositions	18. DISPOSITION On August 24, 2016, the Company sold Heartland, its crop Managing General Agent to CGB for $ 49,000 12,942

Subsequent Events

Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2017
Subsequent Events [Abstract]
Subsequent Events	19. SUBSEQUENT EVENTS The Company has evaluated known recognized and non-recognized subsequent events. The Company does not have subsequent events to report.

Basis Of Presentation (Tables)

Basis Of Presentation (Tables)	6 Months Ended
Basis Of Presentation (Tables)	Jun. 30, 2017
Basis Of Presentation[Abstract]
Schedule of Effect of Newly Adopted Accounting Policies, Cash Flow	Consolidated Statements of Cash Flows: Six Months Ended June 30, 2016 Effect of adoption of As previously new accounting reported policy As adopted (Dollars in thousands) CASH FLOWS FROM OPERATING ACTIVITIES: Change in other assets and liabilities, net $ 17,012 $ 9,090 $ 26,102 Net cash provided by (used in) operating activities 674,476 9,090 683,566 CASH FLOWS FROM FINANCING ACTIVITIES: Cost of shares withheld for taxes on settlements of share-based compensation awards - (9,090 ) (9,090 ) Net cash provided by (used in) financing activities (280,512 ) (9,090 ) (289,602 )

Investments (Tables)

Investments (Tables)	6 Months Ended
Investments (Tables)	Jun. 30, 2017
Investments [Abstract]
Summary Of Unrealized Appreciation (Depreciation) Of Available For Sale, Fixed Maturity And Equity Security Investments	At June 30, 2017 Amortized Unrealized Unrealized Market OTTI in AOCI (Dollars in thousands) Cost Appreciation Depreciation Value (a) Fixed maturity securities U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,263,173 $ 17,481 $ (4,252 ) $ 1,276,402 $ - Obligations of U.S. states and political subdivisions 679,940 22,970 (6,127 ) 696,783 - Corporate securities 5,607,471 117,600 (30,017 ) 5,695,054 2,612 Asset-backed securities 618,348 1,505 (803 ) 619,050 - Mortgage-backed securities Commercial 290,230 1,701 (2,202 ) 289,729 - Agency residential 2,416,739 15,045 (22,521 ) 2,409,263 - Non-agency residential 551 43 (44 ) 550 - Foreign government securities 1,264,330 50,555 (54,161 ) 1,260,724 175 Foreign corporate securities 2,616,144 108,934 (50,598 ) 2,674,480 952 Total fixed maturity securities $ 14,756,926 $ 335,834 $ (170,725 ) $ 14,922,035 $ 3,739 Equity securities $ 110,724 $ 2,335 $ (5,629 ) $ 107,430 $ - At December 31, 2016 Amortized Unrealized Unrealized Market OTTI in AOCI (Dollars in thousands) Cost Appreciation Depreciation Value (a) Fixed maturity securities U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,115,208 $ 20,410 $ (5,303 ) $ 1,130,315 $ - Obligations of U.S. states and political subdivisions 723,938 18,016 (11,970 ) 729,984 - Corporate securities 5,059,388 131,651 (35,758 ) 5,155,281 7,936 Asset-backed securities 488,824 1,110 (1,286 ) 488,648 - Mortgage-backed securities Commercial 308,827 1,983 (3,878 ) 306,932 - Agency residential 2,415,901 17,478 (27,910 ) 2,405,469 - Non-agency residential 642 44 (45 ) 641 - Foreign government securities 1,254,175 61,226 (57,241 ) 1,258,160 115 Foreign corporate securities 2,565,710 130,714 (64,446 ) 2,631,978 1,184 Total fixed maturity securities $ 13,932,613 $ 382,632 $ (207,837 ) $ 14,107,408 $ 9,235 Equity securities $ 129,553 $ 2,298 $ (12,784 ) $ 119,067 $ - (a) Represents the amount of OTTI recognized in AOCI. Amount includes unrealized gains and losses on impaired securities relating to changes in the value of such securities subsequent to the impairment measurement date.
Summary Of Amortized Cost And Market Value Of Fixed Maturity Securities, By Contractual Maturity	At June 30, 2017 At December 31, 2016 Amortized Market Amortized Market (Dollars in thousands) Cost Value Cost Value Fixed maturity securities – available for sale: Due in one year or less $ 1,139,046 $ 1,142,380 $ 956,945 $ 966,970 Due after one year through five years 7,238,430 7,316,671 6,769,585 6,870,056 Due after five years through ten years 2,109,732 2,141,805 2,020,215 2,052,733 Due after ten years 943,850 1,002,587 971,674 1,015,959 Asset-backed securities 618,348 619,050 488,824 488,648 Mortgage-backed securities: Commercial 290,230 289,729 308,827 306,932 Agency residential 2,416,739 2,409,263 2,415,901 2,405,469 Non-agency residential 551 550 642 641 Total fixed maturity securities $ 14,756,926 $ 14,922,035 $ 13,932,613 $ 14,107,408
Summary Of Changes In Net Unrealized Appreciation (Depreciation) For The Company's Investments	Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Increase (decrease) during the period between the market value and cost of investments carried at market value, and deferred taxes thereon: Fixed maturity securities $ (22,246 ) $ 137,383 $ (4,191 ) $ 337,691 Fixed maturity securities, other-than-temporary impairment (994 ) 8,714 (5,495 ) 8,924 Equity securities 1,193 3,005 7,192 7,371 Other invested assets 821 - 1,265 - Change in unrealized appreciation (depreciation), pre-tax (21,226 ) 149,102 (1,229 ) 353,986 Deferred tax benefit (expense) 16,990 (23,938 ) 13,117 (53,410 ) Deferred tax benefit (expense), other-than-temporary impairment 111 (2,256 ) 1,336 (2,325 ) Change in unrealized appreciation (depreciation), net of deferred taxes, included in shareholders' equity $ (4,125 ) $ 122,908 $ 13,224 $ 298,251
Summary Of Aggregate Market Value And Gross Unrealized Depreciation Of Fixed Maturity And Equity Securities, By Security Type	Duration of Unrealized Loss at June 30, 2017 By Security Type Less than 12 months Greater than 12 months Total Gross Gross Gross Unrealized Unrealized Unrealized (Dollars in thousands) Market Value Depreciation Market Value Depreciation Market Value Depreciation Fixed maturity securities - available for sale U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 331,934 $ (4,252 ) $ - $ - $ 331,934 $ (4,252 ) Obligations of U.S. states and political subdivisions 157,890 (6,127 ) - - 157,890 (6,127 ) Corporate securities 1,420,422 (20,647 ) 125,215 (9,370 ) 1,545,637 (30,017 ) Asset-backed securities 203,858 (480 ) 8,343 (323 ) 212,201 (803 ) Mortgage-backed securities Commercial 68,190 (1,345 ) 22,332 (857 ) 90,522 (2,202 ) Agency residential 1,606,001 (17,970 ) 192,524 (4,551 ) 1,798,525 (22,521 ) Non-agency residential - - 85 (44 ) 85 (44 ) Foreign government securities 345,411 (13,794 ) 249,983 (40,367 ) 595,394 (54,161 ) Foreign corporate securities 571,564 (10,287 ) 272,842 (40,311 ) 844,406 (50,598 ) Total fixed maturity securities $ 4,705,270 $ (74,902 ) $ 871,324 $ (95,823 ) $ 5,576,594 $ (170,725 ) Equity securities - - 93,034 (5,629 ) 93,034 (5,629 ) Total $ 4,705,270 $ (74,902 ) $ 964,358 $ (101,452 ) $ 5,669,628 $ (176,354 ) Duration of Unrealized Loss at December 31, 2016 By Security Type Less than 12 months Greater than 12 months Total Gross Gross Gross Unrealized Unrealized Unrealized (Dollars in thousands) Market Value Depreciation Market Value Depreciation Market Value Depreciation Fixed maturity securities - available for sale U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 638,740 $ (5,303 ) $ - $ - $ 638,740 $ (5,303 ) Obligations of U.S. states and political subdivisions 221,088 (11,486 ) 564 (484 ) 221,652 (11,970 ) Corporate securities 1,360,743 (24,023 ) 177,153 (11,735 ) 1,537,896 (35,758 ) Asset-backed securities 150,023 (565 ) 18,786 (721 ) 168,809 (1,286 ) Mortgage-backed securities Commercial 143,554 (3,223 ) 7,184 (655 ) 150,738 (3,878 ) Agency residential 1,618,372 (22,461 ) 189,665 (5,449 ) 1,808,037 (27,910 ) Non-agency residential - - 113 (45 ) 113 (45 ) Foreign government securities 360,289 (12,041 ) 236,820 (45,200 ) 597,109 (57,241 ) Foreign corporate securities 687,599 (12,769 ) 295,500 (51,677 ) 983,099 (64,446 ) Total fixed maturity securities $ 5,180,408 $ (91,871 ) $ 925,785 $ (115,966 ) $ 6,106,193 $ (207,837 ) Equity securities - - 105,507 (12,784 ) 105,507 (12,784 ) Total $ 5,180,408 $ (91,871 ) $ 1,031,292 $ (128,750 ) $ 6,211,700 $ (220,621 )
Summary Of Aggregate Market Value And Gross Unrealized Depreciation Of Fixed Maturity And Equity Securities, By Contractual Maturity	Duration of Unrealized Loss at June 30, 2017 By Maturity Less than 12 months Greater than 12 months Total Gross Gross Gross Unrealized Unrealized Unrealized (Dollars in thousands) Market Value Depreciation Market Value Depreciation Market Value Depreciation Fixed maturity securities Due in one year or less $ 350,274 $ (665 ) $ 103,165 $ (20,017 ) $ 453,439 $ (20,682 ) Due in one year through five years 1,558,372 (26,579 ) 473,502 (63,717 ) 2,031,874 (90,296 ) Due in five years through ten years 741,691 (20,588 ) 67,244 (5,691 ) 808,935 (26,279 ) Due after ten years 176,884 (7,275 ) 4,129 (623 ) 181,013 (7,898 ) Asset-backed securities 203,858 (480 ) 8,343 (323 ) 212,201 (803 ) Mortgage-backed securities 1,674,191 (19,315 ) 214,941 (5,452 ) 1,889,132 (24,767 ) Total fixed maturity securities $ 4,705,270 $ (74,902 ) $ 871,324 $ (95,823 ) $ 5,576,594 $ (170,725 ) Duration of Unrealized Loss at December 31, 2016 By Maturity Less than 12 months Greater than 12 months Total Gross Gross Gross Unrealized Unrealized Unrealized (Dollars in thousands) Market Value Depreciation Market Value Depreciation Market Value Depreciation Fixed maturity securities Due in one year or less $ 178,281 $ (1,122 ) $ 78,153 $ (14,318 ) $ 256,434 $ (15,440 ) Due in one year through five years 2,123,113 (26,263 ) 538,130 (84,803 ) 2,661,243 (111,066 ) Due in five years through ten years 680,334 (22,555 ) 86,631 (8,754 ) 766,965 (31,309 ) Due after ten years 286,731 (15,682 ) 7,123 (1,221 ) 293,854 (16,903 ) Asset-backed securities 150,023 (565 ) 18,786 (721 ) 168,809 (1,286 ) Mortgage-backed securities 1,761,926 (25,684 ) 196,962 (6,149 ) 1,958,888 (31,833 ) Total fixed maturity securities $ 5,180,408 $ (91,871 ) $ 925,785 $ (115,966 ) $ 6,106,193 $ (207,837 )
Summary Of Components Of Net Investment Income	Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Fixed maturities $ 108,122 $ 102,851 $ 211,367 $ 205,376 Equity securities 8,366 10,923 17,111 22,062 Short-term investments and cash 835 345 1,465 745 Other invested assets Limited partnerships 20,060 23,003 31,058 16,845 Other 2,285 1,151 4,557 301 Gross investment income before adjustments 139,668 138,273 265,558 245,329 Funds held interest income (expense) 1,724 1,740 4,872 4,280 Future policy benefit reserve income (expense) (416 ) (425 ) (735 ) (726 ) Gross investment income 140,976 139,588 269,695 248,883 Investment expenses (6,468 ) (6,851 ) (12,898 ) (13,622 ) Net investment income $ 134,508 $ 132,737 $ 256,797 $ 235,261
Summary Of Components Of Net Realized Capital Gains (Losses)	Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Fixed maturity securities, market value: Other-than-temporary impairments $ (2,475 ) $ (1,470 ) $ (3,703 ) $ (30,263 ) Gains (losses) from sales 13,543 3,329 24,915 (13,582 ) Fixed maturity securities, fair value: Gains (losses) from sales - (1,854 ) - (1,854 ) Gains (losses) from fair value adjustments - 1,571 - 1,339 Equity securities, market value: Gains (losses) from sales - 8 (3,436 ) 65 Equity securities, fair value: Gains (losses) from sales 805 (7,690 ) 5,321 (16,116 ) Gains (losses) from fair value adjustments 13,397 38,764 54,904 18,809 Other invested assets (2 ) - (1 ) - Short-term investments gain (loss) - - (4 ) 1 Total net realized capital gains (losses) $ 25,268 $ 32,658 $ 77,996 $ (41,601 )
Summary Of Gross Gains (Losses) From Sales Of Fixed Maturity And Equity Securities	Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Proceeds from sales of fixed maturity securities $ 562,718 $ 272,233 $ 991,209 $ 596,351 Gross gains from sales 17,105 9,094 32,578 17,646 Gross losses from sales (3,563 ) (7,619 ) (7,663 ) (33,082 ) Proceeds from sales of equity securities $ 117,911 $ 337,816 $ 277,028 $ 430,264 Gross gains from sales 3,885 4,893 12,093 6,732 Gross losses from sales (3,080 ) (12,575 ) (10,208 ) (22,783 )

Reserve For Losses, LAE And F29

Reserve For Losses, LAE And Future Policy Benefit Reserve (Tables)	6 Months Ended
	Jun. 30, 2017
Reserve For Losses LAE And Future Policy Benefit Reserve [Abstract]
Summary Of Activity In The Reserve For Losses And LAE	Six Months Ended Twelve Months Ended June 30, December 31, (Dollars in thousands) 2017 2016 Gross reserves at beginning of period $ 10,312,313 $ 9,951,798 Less reinsurance recoverables (990,862 ) (881,503 ) Net reserves at beginning of period 9,321,451 9,070,295 Incurred related to: Current year 1,632,487 3,434,964 Prior years (424 ) (295,335 ) Total incurred losses and LAE 1,632,063 3,139,629 Paid related to: Current year 397,295 745,642 Prior years 1,064,727 2,042,972 Total paid losses and LAE 1,462,022 2,788,614 Foreign exchange/translation adjustment 69,358 (99,859 ) Net reserves at end of period 9,560,850 9,321,451 Plus reinsurance recoverables 914,855 990,862 Gross reserves at end of period $ 10,475,705 $ 10,312,313

Derivatives (Tables)

Derivatives (Tables)	6 Months Ended
Derivatives (Tables)	Jun. 30, 2017
Derivatives [Abstract]
Summary Of The Fair Value Of The Equity Index Put Options	(Dollars in thousands) Derivatives not designated as Location of fair value At At hedging instruments in balance sheets June 30, 2017 December 31, 2016 Equity index put option contracts Equity index put option liability $ 18,662 $ 22,059 Total $ 18,662 $ 22,059 (Dollars in thousands) For the Three Months Ended For the Six Months Ended Derivatives not designated as Location of gain (loss) in statements of June 30, June 30, hedging instruments operations and comprehensive income (loss) 2017 2016 2017 2016 Equity index put option contracts Net derivative gain (loss) $ 766 $ 1,996 $ 3,396 $ (1,024 ) Total $ 766 $ 1,996 $ 3,396 $ (1,024 )

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
Fair Value (Tables)	Jun. 30, 2017
Fair Value [Abstract]
Fair Value Measurement Levels For All Assets And Liabilities	Fair Value Measurement Using: Quoted Prices in Active Significant Markets for Other Significant Identical Observable Unobservable Assets Inputs Inputs (Dollars in thousands) June 30, 2017 (Level 1) (Level 2) (Level 3) Assets: Fixed maturities, market value U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,276,402 $ - $ 1,276,402 $ - Obligations of U.S. States and political subdivisions 696,783 - 696,783 - Corporate securities 5,695,054 - 5,556,949 138,105 Asset-backed securities 619,050 - 619,050 - Mortgage-backed securities Commercial 289,729 - 289,729 - Agency residential 2,409,263 - 2,409,263 - Non-agency residential 550 - 550 - Foreign government securities 1,260,724 - 1,260,724 - Foreign corporate securities 2,674,480 - 2,671,329 3,151 Total fixed maturities, market value 14,922,035 - 14,780,779 141,256 Equity securities, market value 107,430 93,034 14,396 - Equity securities, fair value 1,071,390 1,030,941 40,449 - Liabilities: Equity index put option contracts $ 18,662 $ - $ - $ 18,662 Fair Value Measurement Using: Quoted Prices in Active Significant Markets for Other Significant Identical Observable Unobservable Assets Inputs Inputs (Dollars in thousands) December 31, 2016 (Level 1) (Level 2) (Level 3) Assets: Fixed maturities, market value U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,130,315 $ - $ 1,130,315 $ - Obligations of U.S. States and political subdivisions 729,984 - 729,984 - Corporate securities 5,155,281 - 5,090,084 65,197 Asset-backed securities 488,648 - 488,648 - Mortgage-backed securities Commercial 306,932 - 306,932 - Agency residential 2,405,469 - 2,405,469 - Non-agency residential 641 - 641 - Foreign government securities 1,258,160 - 1,258,160 - Foreign corporate securities 2,631,978 - 2,629,440 2,538 Total fixed maturities, market value 14,107,408 - 14,039,673 67,735 Equity securities, market value 119,067 105,507 13,560 - Equity securities, fair value 1,010,085 949,523 60,562 - Liabilities: Equity index put option contracts $ 22,059 $ - $ - $ 22,059
Activity Under Level 3, Fair Value Measurements Using Significant Unobservable Inputs By Asset Type	Three Months Ended June 30, 2017 Six Months Ended June 30, 2017 Corporate Foreign Corporate Foreign (Dollars in thousands) Securities Corporate Total Securities Corporate Total Beginning balance $ 84,322 $ 2,802 $ 87,124 $ 65,197 $ 2,538 $ 67,735 Total gains or (losses) (realized/unrealized) Included in earnings 711 128 839 925 104 1,029 Included in other comprehensive income (loss) 172 - 172 143 - 143 Purchases, issuances and settlements 52,900 221 53,121 71,840 509 72,349 Transfers in and/or (out) of Level 3 - - - - - - Ending balance $ 138,105 $ 3,151 $ 141,256 $ 138,105 $ 3,151 $ 141,256 The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date $ - $ - $ - $ - $ - $ - (Some amounts may not reconcile due to rounding.) Three Months Ended June 30, 2016 Six Months Ended June 30, 2016 Corporate Foreign Corporate Foreign (Dollars in thousands) Securities Corporate Total Securities Corporate Total Beginning balance $ 15,706 $ 596 $ 16,302 $ 3,933 $ 1,593 $ 5,526 Total gains or (losses) (realized/unrealized) Included in earnings (18 ) - (18 ) (10 ) (997 ) (1,007 ) Included in other comprehensive income (loss) (27 ) 1,425 1,398 (33 ) 1,425 1,392 Purchases, issuances and settlements 16,749 - 16,749 28,520 - 28,520 Transfers in and/or (out) of Level 3 - - - - - - Ending balance $ 32,410 $ 2,021 $ 34,431 $ 32,410 $ 2,021 $ 34,431 The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date $ - $ - $ - $ - $ (997 ) $ (997 ) (Some amounts may not reconcile due to rounding.)
Fair Value Measurements Using Significant Unobservable Inputs For Equity Index Put Option Contracts	Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Liabilities: Balance, beginning of period $ 19,429 $ 43,725 $ 22,059 $ 40,705 Total (gains) or losses (realized/unrealized) Included in earnings (766 ) (1,996 ) (3,396 ) 1,024 Included in other comprehensive income (loss) - - - - Purchases, issuances and settlements - - - - Transfers in and/or (out) of Level 3 - - - - Balance, end of period $ 18,662 $ 41,729 $ 18,662 $ 41,729 The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to liabilities still held at the reporting date $ - $ - $ - $ - (Some amounts may not reconcile due to rounding.)

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	6 Months Ended
Earnings Per Common Share (Tables)	Jun. 30, 2017
Earnings Per Common Share [Abstract]
Schedule Of Net Income (Loss) Per Common Share	Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands, except per share amounts) 2017 2016 2017 2016 Net income (loss) per share: Numerator Net income (loss) $ 245,674 $ 155,692 $ 537,317 $ 327,378 Less: dividends declared-common shares and nonvested common shares (51,304 ) (48,132 ) (102,585 ) (96,838 ) Undistributed earnings 194,370 107,561 434,731 230,540 Percentage allocated to common shareholders (1) 98.9 % 98.9 % 98.9 % 98.9 % 192,279 106,407 430,035 228,102 Add: dividends declared-common shareholders 50,790 47,643 101,543 95,853 Numerator for basic and diluted earnings per common share $ 243,068 $ 154,050 $ 531,577 $ 323,955 Denominator Denominator for basic earnings per weighted-average common shares 40,624 41,653 40,577 41,891 Effect of dilutive securities: Options 250 296 259 315 Denominator for diluted earnings per adjusted weighted-average common shares 40,874 41,949 40,836 42,206 Per common share net income (loss) Basic $ 5.98 $ 3.70 $ 13.10 $ 7.73 Diluted $ 5.95 $ 3.67 $ 13.02 $ 7.68 (1) Basic weighted-average common shares outstanding 40,624 41,653 40,577 41,891 Basic weighted-average common shares outstanding and nonvested common shares expected to vest 41,066 42,104 41,020 42,338 Percentage allocated to common shareholders 98.9 % 98.9 % 98.9 % 98.9 % (Some amounts may not reconcile due to rounding.)

Commitments And Contingencies (

Commitments And Contingencies (Tables)	6 Months Ended
Commitments And Contingencies (Tables)	Jun. 30, 2017
Commitments And Contingencies [Abstract]
Summary Of Estimated Cost To Replace Annuities For Contingent Liability	At June 30, At December 31, (Dollars in thousands) 2017 2016 The Prudential $ 146,923 $ 146,507 Unaffiliated life insurance company 33,107 33,860

Other Comprehensive Income (L34

Other Comprehensive Income (Loss) (Tables)	6 Months Ended
Other Comprehensive Income (Loss) (Tables)	Jun. 30, 2017
Other Comprehensive Income (Loss) [Abstract]
Components Of Comprehensive Income (Loss) In The Consolidated Statements Of Operations	Three Months Ended June 30, 2017 Six Months Ended June 30, 2017 (Dollars in thousands) Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Unrealized appreciation (depreciation) ("URA(D)") on securities - temporary $ (9,165 ) $ 14,916 $ 5,751 $ 22,041 $ 6,534 $ 28,575 URA(D) on securities - OTTI (994 ) 111 (883 ) (5,495 ) 1,336 (4,159 ) Reclassification of net realized losses (gains) included in net income (loss) (11,067 ) 2,074 (8,993 ) (17,775 ) 6,583 (11,192 ) Foreign currency translation adjustments 38,560 (2,893 ) 35,667 52,373 (4,813 ) 47,560 Benefit plan actuarial net gain (loss) - - - - - - Reclassification of benefit plan liability amortization included in net income (loss) 3,083 (1,079 ) 2,004 6,166 (2,158 ) 4,008 Total other comprehensive income (loss) $ 20,417 $ 13,129 $ 33,546 $ 57,310 $ 7,482 $ 64,792 Three Months Ended June 30, 2016 Six Months Ended June 30, 2016 (Dollars in thousands) Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Unrealized appreciation (depreciation) ("URA(D)") on securities - temporary $ 142,255 $ (24,357 ) $ 117,898 $ 301,283 $ (40,564 ) $ 260,719 URA(D) on securities - OTTI 8,714 (2,256 ) 6,458 8,924 (2,325 ) 6,599 Reclassification of net realized losses (gains) included in net income (loss) (1,867 ) 419 (1,448 ) 43,779 (12,846 ) 30,933 Foreign currency translation adjustments 13,389 (8,339 ) 5,050 31,208 (16,385 ) 14,823 Benefit plan actuarial net gain (loss) - - - - - - Reclassification of benefit plan liability amortization included in net income (loss) 2,063 (722 ) 1,341 4,125 (1,444 ) 2,681 Total other comprehensive income (loss) $ 164,554 $ (35,255 ) $ 129,299 $ 389,319 $ (73,564 ) $ 315,755
Reclassification From Accumulated Other Comprehensive Income	Three Months Ended Six Months Ended June 30, June 30, Affected line item within the statements of AOCI component 2017 2016 2017 2016 operations and comprehensive income (loss) (Dollars in thousands) URA(D) on securities $ (11,067 ) $ (1,867 ) $ (17,775 ) $ 43,779 Other net realized capital gains (losses) 2,074 419 6,583 (12,846 ) Income tax expense (benefit) $ (8,993 ) $ (1,448 ) $ (11,192 ) $ 30,933 Net income (loss) Benefit plan net gain (loss) $ 3,083 $ 2,063 $ 6,166 $ 4,125 Other underwriting expenses (1,079 ) (722 ) (2,158 ) (1,444 ) Income tax expense (benefit) $ 2,004 $ 1,341 $ 4,008 $ 2,681 Net income (loss)
Components Of Accumulated Other Comprehensive Income (Loss), Net Of Tax, In The Consolidated Balance Sheets	Six Months Ended Twelve Months Ended June 30, December 31, (Dollars in thousands) 2017 2016 Beginning balance of URA (D) on securities $ 115,558 $ 42,811 Current period change in URA (D) of investments - temporary 17,383 66,802 Current period change in URA (D) of investments - non-credit OTTI (4,159 ) 5,945 Ending balance of URA (D) on securities 128,782 115,558 Beginning balance of foreign currency translation adjustments (266,818 ) (211,477 ) Current period change in foreign currency translation adjustments 47,560 (55,341 ) Ending balance of foreign currency translation adjustments (219,258 ) (266,818 ) Beginning balance of benefit plan net gain (loss) (65,504 ) (63,089 ) Current period change in benefit plan net gain (loss) 4,008 (2,415 ) Ending balance of benefit plan net gain (loss) (61,496 ) (65,504 ) Ending balance of accumulated other comprehensive income (loss) $ (151,972 ) $ (216,764 )

Credit Facilities (Tables)

Credit Facilities (Tables)	6 Months Ended
Credit Facilities (Tables)	Jun. 30, 2017
Line of Credit Facility [Line Items]
Summary Of Costs Incurred Connection With Credit Facilities	Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Credit facility interest and fees incurred $ 106 $ 213 $ 210 $ 583
Wells Fargo Bank Group Credit Facility [Member]
Line of Credit Facility [Line Items]
Summary Of Outstanding Letters Of Credit And/Or Borrowings	(Dollars in thousands) At June 30, 2017 At December 31, 2016 Bank Commitment In Use Date of Expiry Commitment In Use Date of Expiry Wells Fargo Bank Group Credit Facility Tranche One $ 200,000 $ - $ 200,000 $ - Tranche Two 600,000 471,219 12/31/2017 600,000 478,233 12/31/2017 Total Wells Fargo Bank Group Credit Facility $ 800,000 $ 471,219 $ 800,000 $ 478,233
Citibank Bilateral Agreement [Member]
Line of Credit Facility [Line Items]
Summary Of Outstanding Letters Of Credit And/Or Borrowings	(Dollars in thousands) At June 30, 2017 At December 31, 2016 Bank Commitment In Use Date of Expiry Commitment In Use Date of Expiry Citibank Bilateral Letter of Credit Agreement $ 200,000 $ 3,672 11/24/2017 $ 200,000 $ 4,058 2/28/2017 67,672 12/31/2017 3,672 11/24/2017 3,297 2/28/2018 69,404 12/31/2017 281 8/30/2018 269 8/30/2018 3,780 12/31/2018 1,163 12/31/2018 100,632 6/30/2021 93,180 12/30/2020 Total Citibank Bilateral Agreement $ 200,000 $ 179,334 $ 200,000 $ 171,746
Lloyds Bank plc Credit Facility [Member]
Line of Credit Facility [Line Items]
Summary Of Outstanding Letters Of Credit And/Or Borrowings	(Dollars in thousands) At June 30, 2017 At December 31, 2016 Bank Commitment In Use Date of Expiry Commitment In Use Date of Expiry Lloyds Bank plc £ 145,000 £ 140,964 12/31/2020 £ 140,000 £ 130,606 12/31/2019 - - - - Total Lloyds Bank plc Credit Facility £ 145,000 £ 140,964 £ 140,000 £ 130,606

Collateralized Reinsurance An36

Collateralized Reinsurance And Trust Agreements (Tables)	6 Months Ended
Collateralized Reinsurance And Trust Agreements (Tables)	Jun. 30, 2017
Collateralized Reinsurance And Trust Agreements [Abstract]
Premiums And Losses Ceded By The Company To Affiliate	Three Months Ended Six Months Ended June 30, June 30, Mt. Logan Re Segregated Accounts 2017 2016 2017 2016 (Dollars in thousands) Ceded written premiums 42,728 36,178 96,946 92,846 Ceded earned premiums 57,886 47,945 98,483 90,849 Ceded losses and LAE 24,812 18,973 44,397 29,734 Assumed written premiums 3,763 3,073 6,495 6,634 Assumed earned premiums 3,763 3,073 6,495 6,634 Assumed losses and LAE - - - -

Senior Notes (Tables)

Senior Notes (Tables)	6 Months Ended
Senior Notes (Tables)	Jun. 30, 2017
Senior Notes [Abstract]
Schedule Of Outstanding Senior Notes	June 30, 2017 December 31, 2016 Consolidated Balance Consolidated Balance (Dollars in thousands) Date Issued Date Due Principal Amounts Sheet Amount Market Value Sheet Amount Market Value 4.868 06/05/2014 06/01/2044 400,000 $ 396,774 $ 421,764 $ 396,714 $ 383,612
Schedule Of Interest Expense Incurred In Connection With Senior Notes	Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Interest expense incurred $ 4,868 $ 4,868 $ 9,736 $ 9,736

Long Term Subordinated Notes (T

Long Term Subordinated Notes (Tables)	6 Months Ended
Long Term Subordinated Notes (Tables)	Jun. 30, 2017
Long Term Subordinated Notes [Abstract]
Schedule Of Outstanding Fixed To Floating Rate Long Term Subordinated Notes	Maturity Date June 30, 2017 December 31, 2016 Original Consolidated Balance Consolidated Balance (Dollars in thousands) Date Issued Principal Amount Scheduled Final Sheet Amount Market Value Sheet Amount Market Value 6.6 04/26/2007 $ 400,000 05/15/2037 05/01/2067 $ 236,511 $ 223,053 $ 236,462 $ 204,636
Schedule Of Interest Expense Incurred In Connection With Long Term Subordinated Notes	Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Interest expense incurred $ 3,033 $ 3,937 $ 6,970 $ 7,874

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
Segment Reporting (Tables)	Jun. 30, 2017
Segment Reporting [Abstract]
Schedule Of Underwriting Results For Operating Segments	Three Months Ended Six Months Ended U.S. Reinsurance June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Gross written premiums $ 474,993 $ 405,530 $ 1,053,951 $ 942,235 Net written premiums 385,267 341,616 902,636 812,307 Premiums earned $ 478,494 $ 473,273 $ 960,018 $ 959,814 Incurred losses and LAE 267,621 219,590 529,687 456,034 Commission and brokerage 112,423 120,624 214,781 237,941 Other underwriting expenses 14,278 12,132 28,529 25,591 Underwriting gain (loss) $ 84,172 $ 120,927 $ 187,021 $ 240,248 Three Months Ended Six Months Ended International June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Gross written premiums $ 319,786 $ 340,625 $ 586,203 $ 576,216 Net written premiums 272,369 281,201 518,031 483,701 Premiums earned $ 263,816 $ 290,601 $ 535,397 $ 541,051 Incurred losses and LAE 172,488 261,864 331,989 409,399 Commission and brokerage 64,847 66,678 130,997 130,964 Other underwriting expenses 9,814 7,969 19,294 15,792 Underwriting gain (loss) $ 16,667 $ (45,910 ) $ 53,117 $ (15,104 ) Three Months Ended Six Months Ended Bermuda June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Gross written premiums $ 237,570 $ 161,930 $ 558,692 $ 366,662 Net written premiums 217,814 148,441 522,846 332,755 Premiums earned $ 263,457 $ 200,277 $ 498,563 $ 394,705 Incurred losses and LAE 165,305 109,829 293,737 221,350 Commission and brokerage 63,486 59,886 121,909 109,808 Other underwriting expenses 9,022 8,320 18,502 17,505 Underwriting gain (loss) $ 25,644 $ 22,242 $ 64,415 $ 46,042 Three Months Ended Six Months Ended Insurance June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Gross written premiums $ 569,300 $ 455,266 $ 1,003,747 $ 831,426 Net written premiums 463,683 383,695 809,434 707,647 Premiums earned $ 363,914 $ 324,709 $ 687,800 $ 612,157 Incurred losses and LAE 255,861 266,533 476,650 471,782 Commission and brokerage 59,200 48,314 114,538 91,795 Other underwriting expenses 45,755 43,656 88,431 85,299 Underwriting gain (loss) $ 3,098 $ (33,794 ) $ 8,181 $ (36,719 )
Schedule Of Underwriting Results For Operating Segments To Income (Loss) Before Taxes	Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Underwriting gain (loss) $ 129,581 $ 63,465 $ 312,734 $ 234,467 Net investment income 134,508 132,737 256,797 235,261 Net realized capital gains (losses) 25,268 32,658 77,996 (41,601 ) Net derivative gain (loss) 766 1,996 3,396 (1,024 ) Corporate expenses (6,919 ) (7,117 ) (15,376 ) (15,003 ) Interest, fee and bond issue cost amortization expense (8,059 ) (9,073 ) (17,023 ) (18,301 ) Other income (expense) 388 (28,367 ) (4,578 ) (30,433 ) Income (loss) before taxes $ 275,533 $ 186,299 $ 613,946 $ 363,366
Schedule Of Gross Written Premiums Derived From Largest Non-U.S. Market	Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 United Kingdom gross written premium $ 204,965 $ 146,578 $ 375,785 $ 329,208

Retirement Benefits (Tables)

Retirement Benefits (Tables)	6 Months Ended
Retirement Benefits (Tables)	Jun. 30, 2017
Retirement Benefits [Abstract]
Summary Of Pension Expense	Pension Benefits Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Service cost $ 3,299 $ 2,896 $ 6,598 $ 5,793 Interest cost 2,276 2,361 4,552 4,722 Expected return on plan assets (3,154 ) (2,484 ) (6,309 ) (4,968 ) Amortization of net (income) loss 3,041 2,014 6,081 4,028 Net periodic benefit cost $ 5,461 $ 4,787 $ 10,921 $ 9,575 Other Benefits Three Months Ended Six Months Ended June 30, June 30, (Dollars in thousands) 2017 2016 2017 2016 Service cost $ 441 $ 438 $ 881 $ 876 Interest cost 249 296 498 592 Amortization of prior service cost (33 ) - (66 ) - Amortization of net (income) loss 75 48 151 96 Net periodic benefit cost $ 732 $ 782 $ 1,464 $ 1,564 (Some amounts may not reconcile due to rounding.)

Basis Of Presentation (Schedule

Basis Of Presentation (Schedule of Effect of Newly Adopted Accounting Policies, Cash Flow) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 245,674	$ 155,692	$ 537,317	$ 327,378
Change in other assets and liabilities, net			(61,765)	26,102
Net cash provided by (used in) operating activities			634,362	683,566
CASH FLOWS FROM FINANCING ACTIVITIES:
Cost of shares withheld for taxes on settlements of share-based compensation awards			(12,407)	(9,090)
Net cash provided by (used in) financing activities			$ (120,839)	(289,602)
As Previously Reported [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Change in other assets and liabilities, net				17,012
Net cash provided by (used in) operating activities				674,476
CASH FLOWS FROM FINANCING ACTIVITIES:
Cost of shares withheld for taxes on settlements of share-based compensation awards
Net cash provided by (used in) financing activities				(280,512)
Effect Of Adoption Of New Accounting Policy [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Change in other assets and liabilities, net				9,090
Net cash provided by (used in) operating activities				9,090
CASH FLOWS FROM FINANCING ACTIVITIES:
Cost of shares withheld for taxes on settlements of share-based compensation awards				(9,090)
Net cash provided by (used in) financing activities				$ (9,090)

Investments (Narrative) (Detail

Investments (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
Investments (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Mar. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Percentage threshold that triggers a review of available for sale debt securities for declines in market value	80.00%
Aggregate market value of investments in unrealized loss position	$ 5,669,628		$ 6,211,700
Gross unrealized losses on investments in unrealized loss position	176,354		220,621
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation	74,902		91,871
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation	101,452		128,750
Gross unrealized depreciation			0	$ 0
Additional contractual commitments	591,182
Other invested assets	$ 1,304,556		1,333,129
Sales Revenue, Net [Member]
Schedule of Available-for-sale Securities [Line Items]
Percentage threshold of unrealized losses not exceeded by any one single issuer	5.00%	5.00%
Minimum [Member]
Schedule of Available-for-sale Securities [Line Items]
Limited partnership financial reporting lag time, months	1 month
Maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Limited partnership financial reporting lag time, months	3 months
Investment Grade [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation	$ 68,612		85,078
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation	89,724
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Aggregate market value of investments in unrealized loss position	5,576,594		6,106,193
Gross unrealized losses on investments in unrealized loss position	170,725		207,837
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation	74,902		91,871
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation	$ 95,823		$ 115,966
Fixed Maturity Securities [Member] \| Sales Revenue, Net [Member]
Schedule of Available-for-sale Securities [Line Items]
Percentage threshold of unrealized losses not exceeded by any one single issuer	1.00%		1.10%
Foreign Exchange Losses [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation			$ 112,132
Private Placement Liquidity Sweep [Member]
Schedule of Available-for-sale Securities [Line Items]
Other invested assets	$ 246,973		$ 378,862

Investments (Summary Of Unreali

Investments (Summary Of Unrealized Appreciation (Depreciation) Of Available For Sale, Fixed Maturity And Equity Security Investments) (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		$ 14,756,926	$ 13,932,613
Unrealized Appreciation		335,834	382,632
Unrealized Depreciation		(170,725)	(207,837)
Market Value		14,922,035	14,107,408
OTTI in AOCI	[1]	3,739	9,235
U.S. Treasury Securities And Obligations Of U.S. Government Agencies And Corporations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		1,263,173	1,115,208
Unrealized Appreciation		17,481	20,410
Unrealized Depreciation		(4,252)	(5,303)
Market Value		1,276,402	1,130,315
OTTI in AOCI	[1]
Obligations Of U.S. States And Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		679,940	723,938
Unrealized Appreciation		22,970	18,016
Unrealized Depreciation		(6,127)	(11,970)
Market Value		696,783	729,984
OTTI in AOCI	[1]
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		5,607,471	5,059,388
Unrealized Appreciation		117,600	131,651
Unrealized Depreciation		(30,017)	(35,758)
Market Value		5,695,054	5,155,281
OTTI in AOCI	[1]	2,612	7,936
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		618,348	488,824
Unrealized Appreciation		1,505	1,110
Unrealized Depreciation		(803)	(1,286)
Market Value		619,050	488,648
OTTI in AOCI	[1]
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		290,230	308,827
Unrealized Appreciation		1,701	1,983
Unrealized Depreciation		(2,202)	(3,878)
Market Value		289,729	306,932
OTTI in AOCI	[1]
Agency Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		2,416,739	2,415,901
Unrealized Appreciation		15,045	17,478
Unrealized Depreciation		(22,521)	(27,910)
Market Value		2,409,263	2,405,469
OTTI in AOCI	[1]
Non-Agency Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		551	642
Unrealized Appreciation		43	44
Unrealized Depreciation		(44)	(45)
Market Value		550	641
OTTI in AOCI	[1]
Foreign Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		1,264,330	1,254,175
Unrealized Appreciation		50,555	61,226
Unrealized Depreciation		(54,161)	(57,241)
Market Value		1,260,724	1,258,160
OTTI in AOCI	[1]	175	115
Foreign Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		2,616,144	2,565,710
Unrealized Appreciation		108,934	130,714
Unrealized Depreciation		(50,598)	(64,446)
Market Value		2,674,480	2,631,978
OTTI in AOCI	[1]	952	1,184
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		110,724	129,553
Unrealized Appreciation		2,335	2,298
Unrealized Depreciation		(5,629)	(12,784)
Market Value		107,430	119,067
OTTI in AOCI	[1]

[1]	Represents the amount of OTTI recognized in AOCI. Amount includes unrealized gains and losses on impaired securities relating to changes in the value of such securities subsequent to the impairment measurement date

Investments (Summary Of Amortiz

Investments (Summary Of Amortized Cost And Market Value Of Fixed Maturity Securities, By Contractual Maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities - available for sale, Amortized Cost	$ 14,756,926	$ 13,932,613
Fixed maturity securities - available for sale, Market Value	14,922,035	14,107,408
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities - available for sale, Due in one year or less, Amortized Cost	1,139,046	956,945
Fixed maturity securities - available for sale, Due after one year through five years, Amortized Cost	7,238,430	6,769,585
Fixed maturity securities - available for sale, Due after five years through ten years, Amortized Cost	2,109,732	2,020,215
Fixed maturity securities - available for sale, Due after ten years, Amortized Cost	943,850	971,674
Fixed maturity securities - available for sale, Due in one year or less, Market Value	1,142,380	966,970
Fixed maturity securities - available for sale, Due after one year through five years, Market Value	7,316,671	6,870,056
Fixed maturity securities - available for sale, Due after five years through ten years, Market Value	2,141,805	2,052,733
Fixed maturity securities - available for sale, Due after ten years, Market Value	1,002,587	1,015,959
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities - available for sale, Amortized Cost	618,348	488,824
Fixed maturity securities - available for sale, Market Value	619,050	488,648
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities - available for sale, Amortized Cost	290,230	308,827
Fixed maturity securities - available for sale, Market Value	289,729	306,932
Agency Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities - available for sale, Amortized Cost	2,416,739	2,415,901
Fixed maturity securities - available for sale, Market Value	2,409,263	2,405,469
Non-Agency Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities - available for sale, Amortized Cost	551	642
Fixed maturity securities - available for sale, Market Value	$ 550	$ 641

Investments (Summary Of Changes

Investments (Summary Of Changes In Net Unrealized Appreciation (Depreciation) For The Company's Investments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	$ (21,226)	$ 149,102	$ (1,229)	$ 353,986
Deferred tax benefit (expense)	16,990	(23,938)	13,117	(53,410)
Deferred tax benefit (expense), other-than-temporary impairment	111	(2,256)	1,336	(2,325)
Total URA(D) on securities arising during the period	(4,125)	122,908	13,224	298,251
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	(22,246)	137,383	(4,191)	337,691
Fixed Maturity Securities, Other-Than-Temporary Impairment [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	(994)	8,714	(5,495)	8,924
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	1,193	3,005	7,192	7,371
Other Invested Assets [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	$ 821		$ 1,265

Investments (Summary Of Aggrega

Investments (Summary Of Aggregate Market Value And Gross Unrealized Depreciation Of Fixed Maturity And Equity Securities, By Security Type) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Less than 12 months, Market Value	$ 4,705,270	$ 5,180,408
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(74,902)	(91,871)
Fixed maturity securities, Greater than 12 months, Market Value	964,358	1,031,292
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(101,452)	(128,750)
Fixed maturity securities, Total, Market Value	5,669,628	6,211,700
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(176,354)	(220,621)
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Less than 12 months, Market Value	4,705,270	5,180,408
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(74,902)	(91,871)
Fixed maturity securities, Greater than 12 months, Market Value	871,324	925,785
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(95,823)	(115,966)
Fixed maturity securities, Total, Market Value	5,576,594	6,106,193
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(170,725)	(207,837)
U.S. Treasury Securities And Obligations Of U.S. Government Agencies And Corporations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Less than 12 months, Market Value	331,934	638,740
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(4,252)	(5,303)
Fixed maturity securities, Greater than 12 months, Market Value
Fixed maturity securities, Total, Market Value	331,934	638,740
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(4,252)	(5,303)
Obligations Of U.S. States And Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Less than 12 months, Market Value	157,890	221,088
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(6,127)	(11,486)
Fixed maturity securities, Greater than 12 months, Market Value		564
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation		(484)
Fixed maturity securities, Total, Market Value	157,890	221,652
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(6,127)	(11,970)
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Less than 12 months, Market Value	1,420,422	1,360,743
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(20,647)	(24,023)
Fixed maturity securities, Greater than 12 months, Market Value	125,215	177,153
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(9,370)	(11,735)
Fixed maturity securities, Total, Market Value	1,545,637	1,537,896
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(30,017)	(35,758)
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Less than 12 months, Market Value	203,858	150,023
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(480)	(565)
Fixed maturity securities, Greater than 12 months, Market Value	8,343	18,786
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(323)	(721)
Fixed maturity securities, Total, Market Value	212,201	168,809
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(803)	(1,286)
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Less than 12 months, Market Value	68,190	143,554
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(1,345)	(3,223)
Fixed maturity securities, Greater than 12 months, Market Value	22,332	7,184
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(857)	(655)
Fixed maturity securities, Total, Market Value	90,522	150,738
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(2,202)	(3,878)
Agency Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Less than 12 months, Market Value	1,606,001	1,618,372
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(17,970)	(22,461)
Fixed maturity securities, Greater than 12 months, Market Value	192,524	189,665
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(4,551)	(5,449)
Fixed maturity securities, Total, Market Value	1,798,525	1,808,037
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(22,521)	(27,910)
Non-Agency Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Less than 12 months, Market Value
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation
Fixed maturity securities, Greater than 12 months, Market Value	85	113
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(44)	(45)
Fixed maturity securities, Total, Market Value	85	113
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(44)	(45)
Foreign Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Less than 12 months, Market Value	345,411	360,289
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(13,794)	(12,041)
Fixed maturity securities, Greater than 12 months, Market Value	249,983	236,820
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(40,367)	(45,200)
Fixed maturity securities, Total, Market Value	595,394	597,109
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(54,161)	(57,241)
Foreign Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Less than 12 months, Market Value	571,564	687,599
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(10,287)	(12,769)
Fixed maturity securities, Greater than 12 months, Market Value	272,842	295,500
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(40,311)	(51,677)
Fixed maturity securities, Total, Market Value	844,406	983,099
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(50,598)	(64,446)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Less than 12 months, Market Value
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation
Fixed maturity securities, Greater than 12 months, Market Value	93,034	105,507
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(5,629)	(12,784)
Fixed maturity securities, Total, Market Value	93,034	105,507
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	$ (5,629)	$ (12,784)

Investments (Summary Of Aggre47

Investments (Summary Of Aggregate Market Value And Gross Unrealized Depreciation Of Fixed Maturity And Equity Securities, By Contractual Maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	$ 4,705,270	$ 5,180,408
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(74,902)	(91,871)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	964,358	1,031,292
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(101,452)	(128,750)
Fixed maturity securities, Total, Market Value	5,669,628	6,211,700
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(176,354)	(220,621)
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	4,705,270	5,180,408
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(74,902)	(91,871)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	871,324	925,785
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(95,823)	(115,966)
Fixed maturity securities, Total, Market Value	5,576,594	6,106,193
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(170,725)	(207,837)
Due In One Year Or Less [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	350,274	178,281
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(665)	(1,122)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	103,165	78,153
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(20,017)	(14,318)
Fixed maturity securities, Total, Market Value	453,439	256,434
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(20,682)	(15,440)
Due In One Year Through Five Years [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	1,558,372	2,123,113
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(26,579)	(26,263)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	473,502	538,130
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(63,717)	(84,803)
Fixed maturity securities, Total, Market Value	2,031,874	2,661,243
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(90,296)	(111,066)
Due In Five Years Through Ten Years [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	741,691	680,334
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(20,588)	(22,555)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	67,244	86,631
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(5,691)	(8,754)
Fixed maturity securities, Total, Market Value	808,935	766,965
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(26,279)	(31,309)
Due After Ten Years [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	176,884	286,731
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(7,275)	(15,682)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	4,129	7,123
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(623)	(1,221)
Fixed maturity securities, Total, Market Value	181,013	293,854
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(7,898)	(16,903)
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	203,858	150,023
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(480)	(565)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	8,343	18,786
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(323)	(721)
Fixed maturity securities, Total, Market Value	212,201	168,809
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(803)	(1,286)
Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	1,674,191	1,761,926
Fixed maturity securities, Duration of Unrealized loss, less than 12 months, Gross Unrealized Depreciation	(19,315)	(25,684)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	214,941	196,962
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(5,452)	(6,149)
Fixed maturity securities, Total, Market Value	1,889,132	1,958,888
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	$ (24,767)	$ (31,833)

Investments (Summary Of Compone

Investments (Summary Of Components Of Net Investment Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	$ 139,668	$ 138,273	$ 265,558	$ 245,329
Funds held interest income (expense)	1,724	1,740	4,872	4,280
Future policy benefit reserve income (expense)	(416)	(425)	(735)	(726)
Gross investment income	140,976	139,588	269,695	248,883
Investment expenses	(6,468)	(6,851)	(12,898)	(13,622)
Net investment income	134,508	132,737	256,797	235,261
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	108,122	102,851	211,367	205,376
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	8,366	10,923	17,111	22,062
Short-Term Investments And Cash [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	835	345	1,465	745
Limited Partnerships [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	20,060	23,003	31,058	16,845
Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	$ 2,285	$ 1,151	$ 4,557	$ 301

Investments (Summary Of Compo49

Investments (Summary Of Components Of Net Realized Capital Gains (Losses)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporary impairments	$ (2,475)	$ (1,470)	$ (3,703)	$ (30,263)
Total net realized capital gains (losses)	25,268	32,658	77,996	(41,601)
Fixed Maturity Securities [Member] \| Market Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporary impairments	(2,475)	(1,470)	(3,703)	(30,263)
Gains (losses) from sales	13,543	3,329	24,915	(13,582)
Fixed Maturity Securities [Member] \| Fair Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Gains (losses) from sales		(1,854)		(1,854)
Gains (losses) from fair value adjustments		1,571		1,339
Equity Securities [Member] \| Market Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Gains (losses) from sales		8	(3,436)	65
Equity Securities [Member] \| Fair Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Gains (losses) from sales	805	(7,690)	5,321	(16,116)
Gains (losses) from fair value adjustments	13,397	38,764	54,904	18,809
Other Invested Assets [Member] \| Fair Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Gains (losses) from sales	$ (2)		(1)
Short-Term Investments And Cash [Member] \| Fair Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Gains (losses) from sales			$ (4)	$ 1

Investments (Summary Of Gross G

Investments (Summary Of Gross Gains (Losses) From Sales Of Fixed Maturity And Equity Securities) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities	$ 562,718	$ 272,233	$ 991,209	$ 596,351
Gross gains from sales	17,105	9,094	32,578	17,646
Gross losses from sales	(3,563)	(7,619)	(7,663)	(33,082)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities	117,911	337,816	277,028	430,264
Gross gains from sales	3,885	4,893	12,093	6,732
Gross losses from sales	$ (3,080)	$ (12,575)	$ (10,208)	$ (22,783)

Reserve For Losses, LAE And F51

Reserve For Losses, LAE And Future Policy Benefit Reserve (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Reserve For Losses LAE And Future Policy Benefit Reserve [Line Items]
Increase (decrease) in insurance business	$ (424)	$ (295,335)
Partially offset, related to development on A&E reserves		53,909
Case reserve established by the Company on direct excess insurance claims	$ 10,475,705	10,312,313	$ 9,951,798
Property and Short-Tail Business [Member]
Reserve For Losses LAE And Future Policy Benefit Reserve [Line Items]
Increase (decrease) in reinsurance business		468,749
Explosion, Port Of Tianjin, China [Member]
Reserve For Losses LAE And Future Policy Benefit Reserve [Line Items]
Increase (decrease) in reinsurance business		43,280
Explosion, Port Of Tianjin, China [Member] \| Estimated [Member]
Reserve For Losses LAE And Future Policy Benefit Reserve [Line Items]
Increase (decrease) in reinsurance business		60,000
Explosion, Port Of Tianjin, China [Member] \| Projected [Member]
Reserve For Losses LAE And Future Policy Benefit Reserve [Line Items]
Increase (decrease) in reinsurance business		16,720
Construction Liability, Umbrella, and Workers Compenstion Reserves [Member]
Reserve For Losses LAE And Future Policy Benefit Reserve [Line Items]
Increase (decrease) in reinsurance business		$ 173,414

Reserve For Losses, LAE And F52

Reserve For Losses, LAE And Future Policy Benefit Reserve (Summary Of Activity In The Reserve For Losses And LAE) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Reserve For Losses LAE And Future Policy Benefit Reserve [Abstract]
Gross reserves at beginning of period	$ 10,312,313	$ 9,951,798
Less reinsurance recoverable	(914,855)	(990,862)	$ (881,503)
Net reserves at beginning of period	9,321,451	9,070,295
Incurred related to: Current year	1,632,487	3,434,964
Incurred related to: Prior years	(424)	(295,335)
Total incurred losses and LAE	1,632,063	3,139,629
Paid related to: Current year	397,295	745,642
Paid related to: Prior years	1,064,727	2,042,972
Total paid losses and LAE	1,462,022	2,788,614
Foreign exchange/translation adjustment	69,358	(99,859)
Net reserves at end of period	9,560,850	9,321,451
Plus reinsurance recoverable	914,855	990,862
Gross reserves at end of period	$ 10,475,705	$ 10,312,313

Derivatives (Narrative) (Detail

Derivatives (Narrative) (Details)	6 Months Ended
Derivatives (Narrative) (Details)	Jun. 30, 2017USD ($)itemsecurity	Dec. 31, 2016USD ($)	Dec. 31, 2005security	Dec. 31, 2001security
Derivative [Line Items]
Number of equity index put option contracts	7		7	7
Number of equity indices \| item	2
Equity index put option liability	$ 18,662,000	$ 22,059,000
Equity Index Put Option Contracts [Member]
Derivative [Line Items]
Number of equity index put option contracts \| item	1
Equity index put option liability	$ 0
Equity Index Put Option Contracts [Member] \| Fair Value [Member]
Derivative [Line Items]
Equity index put option liability	$ 18,662,000	$ 22,059,000
Standard & Poor's 500 Index [Member]
Derivative [Line Items]
Number of equity index put option contracts \| security	5
Theoretical maximum payout occurs based on index value	$ 0
Discount factor	3.00%
Present value of theoretical maximum payouts	$ 394,610,000
Settlement amount if contracts had expired	$ 0
Equity Index If Contracts Had Expired \| item	2,423.41
Standard & Poor's 500 Index [Member] \| Maximum [Member]
Derivative [Line Items]
Estimates the probability of equity index put option contract will falling below the strike price on the exercise date	3.00%
FTSE 100 Index [Member]
Derivative [Line Items]
Number of equity index put option contracts \| security	1
Theoretical maximum payout occurs based on index value	$ 0
Discount factor	3.00%
Present value of theoretical maximum payouts	$ 38,282,000
Settlement amount if contracts had expired	$ 0
Equity Index If Contracts Had Expired \| item	7,312.72
FTSE 100 Index [Member] \| Maximum [Member]
Derivative [Line Items]
Estimates the probability of equity index put option contract will falling below the strike price on the exercise date	20.00%

Derivatives (Summary Of The Fai

Derivatives (Summary Of The Fair Value Of The Equity Index Put Options) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Option Indexed to Issuer's Equity [Line Items]
Equity index put option liability	$ 18,662		$ 18,662		$ 22,059
Net derivative gain (loss)	766	$ 1,996	3,396	$ (1,024)
Equity Index Put Option Contracts [Member] \| Derivatives Not Designated As Hedging Instruments [Member]
Option Indexed to Issuer's Equity [Line Items]
Equity index put option liability	18,662		18,662		$ 22,059
Net derivative gain (loss)	$ 766	$ 1,996	$ 3,396	$ (1,024)

Fair Value (Narrative) (Details

Fair Value (Narrative) (Details) $ in Thousands	3 Months Ended	6 Months Ended
Fair Value (Narrative) (Details) $ in Thousands	Jun. 30, 2017USD ($)securityitem	Jun. 30, 2017USD ($)securityitem	Dec. 31, 2016USD ($)security	Dec. 31, 2005security	Dec. 31, 2001security
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of public equity portfolio	$ 306,445	$ 306,445	$ 256,041
Number of equity index put option contracts	7	7		7	7
Derivatives, Number Of Indices \| item		2
Equity index put option liability	$ 18,662	$ 18,662	22,059
other invested assets	277,135	277,135	263,459
Transfers between level 1 and 2	0	0
Transfers from level 3
Accounting Standards Update 2015-07 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
other invested assets	$ 52,139	$ 52,139	$ 18,801
Unavailability Of Prices [Member] \| Private Placement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of securities \| security	46	46	42
Available-for-sale Securities	$ 89,291	$ 89,291	$ 86,536
Par Value [Member] \| Unavailability Of Prices [Member] \| Private Placement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of securities \| security	1	1
Available-for-sale Securities	$ 51,965	$ 51,965
Equity Index Put Option Contracts [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Number of equity index put option contracts \| item	1	1
Equity index put option liability	$ 0	$ 0
Equity Index Put Option Contracts [Member] \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity index put option liability	$ 18,662	$ 18,662	$ 22,059

Fair Value (Fair Value Measurem

Fair Value (Fair Value Measurement Levels For All Assets And Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	$ 14,922,035	$ 14,107,408
Equity securities, market value	107,430	119,067
Equity securities, fair value	1,071,390	1,010,085
Equity index put option contracts	18,662	22,059
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Equity securities, market value	93,034	105,507
Equity securities, fair value	1,030,941	949,523
Equity index put option contracts
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	14,780,779	14,039,673
Equity securities, market value	14,396	13,560
Equity securities, fair value	40,449	60,562
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	141,256	67,735
Equity securities, market value
Equity securities, fair value
Equity index put option contracts	18,662	22,059
U.S. Treasury Securities And Obligations Of U.S. Government Agencies And Corporations [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	1,276,402	1,130,315
U.S. Treasury Securities And Obligations Of U.S. Government Agencies And Corporations [Member] \| Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
U.S. Treasury Securities And Obligations Of U.S. Government Agencies And Corporations [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	1,276,402	1,130,315
U.S. Treasury Securities And Obligations Of U.S. Government Agencies And Corporations [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Obligations Of U.S. States And Political Subdivisions [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	696,783	729,984
Obligations Of U.S. States And Political Subdivisions [Member] \| Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Obligations Of U.S. States And Political Subdivisions [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	696,783	729,984
Obligations Of U.S. States And Political Subdivisions [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Corporate Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	5,695,054	5,155,281
Corporate Securities [Member] \| Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Corporate Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	5,556,949	5,090,084
Corporate Securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	138,105	65,197
Asset-Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	619,050	488,648
Asset-Backed Securities [Member] \| Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Asset-Backed Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	619,050	488,648
Asset-Backed Securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Commercial Mortgage-Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	289,729	306,932
Commercial Mortgage-Backed Securities [Member] \| Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Commercial Mortgage-Backed Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	289,729	306,932
Commercial Mortgage-Backed Securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Agency Residential [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	2,409,263	2,405,469
Agency Residential [Member] \| Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Agency Residential [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	2,409,263	2,405,469
Agency Residential [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Non-Agency Residential [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	550	641
Non-Agency Residential [Member] \| Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Non-Agency Residential [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	550	641
Non-Agency Residential [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Foreign Government Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	1,260,724	1,258,160
Foreign Government Securities [Member] \| Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Foreign Government Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	1,260,724	1,258,160
Foreign Government Securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Foreign Corporate Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	2,674,480	2,631,978
Foreign Corporate Securities [Member] \| Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value
Foreign Corporate Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	2,671,329	2,629,440
Foreign Corporate Securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	$ 3,151	$ 2,538

Fair Value (Activity Under Leve

Fair Value (Activity Under Level 3, Fair Value Measurements Using Significant Unobservable Inputs By Asset Type) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 87,124	$ 16,302	$ 67,735	$ 5,526
Total gains or (losses) (realized/unrealized) Included in earnings	839	(18)	1,029	(1,007)
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)	172	1,398	143	1,392
Purchases, issuances and settlements	53,121	16,749	72,349	28,520
Transfers in and/or (out) of Level 3
Ending balance	141,256	34,431	141,256	34,431
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date				(997)
Corporate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	84,322	15,706	65,197	3,933
Total gains or (losses) (realized/unrealized) Included in earnings	711	(18)	925	(10)
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)	172	(27)	143	(33)
Purchases, issuances and settlements	52,900	16,749	71,840	28,520
Transfers in and/or (out) of Level 3
Ending balance	138,105	32,410	138,105	32,410
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date
Foreign Corporate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	2,802	596	2,538	1,593
Total gains or (losses) (realized/unrealized) Included in earnings	128		104	(997)
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)		1,425		1,425
Purchases, issuances and settlements	221		509
Transfers in and/or (out) of Level 3
Ending balance	3,151	$ 2,021	3,151	2,021
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date				$ (997)

Fair Value (Fair Value Measur58

Fair Value (Fair Value Measurements Using Significant Unobservable Inputs For Equity Index Put Option Contracts) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Fair Value [Abstract]
Balance, beginning of period	$ 19,429	$ 43,725	$ 22,059	$ 40,705
Total (gains) or losses (realized/unrealized) Included in earnings	(766)	(1,996)	(3,396)	1,024
Total (gains) or losses (realized/unrealized) Included in other comprehensive income (loss)
Purchases, issuances and settlements
Transfers in and/or (out) of Level 3
Balance, end of period	18,662	41,729	18,662	41,729
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to liabilities still held at the reporting date	$ 0	$ 0	$ 0	$ 0

Earnings Per Common Share (Narr

Earnings Per Common Share (Narrative) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Common Share [Abstract]
Anti-dilutive options	0	0	0	0

Earnings Per Common Share (Sche

Earnings Per Common Share (Schedule Of Net Income (Loss) Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Common Share [Abstract]
Net income (loss)	$ 245,674	$ 155,692	$ 537,317	$ 327,378
Less: dividends declared-common shares and nonvested common shares	(51,304)	(48,132)	(102,585)	(96,838)
Undistributed earnings	$ 194,370	$ 107,561	$ 434,731	$ 230,540
Percentage allocated to common shareholders	98.90%	98.90%	98.90%	98.90%
Net income (loss) available to common stockholders, total	$ 192,279	$ 106,407	$ 430,035	$ 228,102
Add: dividends declared-common shareholders	50,790	47,643	101,543	95,853
Numerator for basic and diluted earnings per common share	$ 243,068	$ 154,050	$ 531,577	$ 323,955
Denominator for basic earnings per weighted-average common shares	40,624	41,653	40,577	41,891
Effect of dilutive securities: Options	250	296	259	315
Denominator for diluted earnings per adjusted weighted-average common shares	40,874	41,949	40,836	42,206
Basic	$ 5.98	$ 3.70	$ 13.10	$ 7.73
Diluted	$ 5.95	$ 3.67	$ 13.02	$ 7.68
Basic weighted-average common shares outstanding	40,624	41,653	40,577	41,891
Basic weighted-average common shares outstanding and nonvested common shares expected to vest	41,066	42,104	41,020	42,338

Commitments And Contingencies61

Commitments And Contingencies (Summary Of Estimated Cost To Replace Annuities For Contingent Liability) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
The Prudential [Member]
Loss Contingencies [Line Items]
Estimated cost to replace annuities	$ 146,923	$ 146,507
Unaffiliated Life Insurance Company [Member]
Loss Contingencies [Line Items]
Estimated cost to replace annuities	$ 33,107	$ 33,860

Other Comprehensive Income (L62

Other Comprehensive Income (Loss) (Components Of Comprehensive Income (Loss) In The Consolidated Statements Of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total, Before Tax	$ 20,417	$ 164,554	$ 57,310	$ 389,319
Total, Tax Effect	13,129	(35,255)	7,482	(73,564)
Total, Net of Tax	33,546	129,299	64,792	315,755
URA(D) On Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax	(9,165)	142,255	22,041	301,283
Tax Effect	14,916	(24,357)	6,534	(40,564)
Net of Tax	5,751	117,898	28,575	260,719
Reclassification, Before Tax	(11,067)	(1,867)	(17,775)	43,779
Reclassification, Tax Effect	2,074	419	6,583	(12,846)
Reclassification, Net of Tax	(8,993)	(1,448)	(11,192)	30,933
Total, Net of Tax			17,383		$ 66,802
URA(D) On Securities OTTI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax	(994)	8,714	(5,495)	8,924
Tax Effect	111	(2,256)	1,336	(2,325)
Net of Tax	(883)	6,458	(4,159)	6,599
Total, Net of Tax			(4,159)		5,945
Foreign Currency Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax	38,560	13,389	52,373	31,208
Tax Effect	(2,893)	(8,339)	(4,813)	(16,385)
Net of Tax	35,667	5,050	47,560	14,823
Total, Net of Tax			47,560		(55,341)
Benefit Plan Net Gain (Loss)[Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax
Tax Effect
Net of Tax
Reclassification, Before Tax	3,083	2,063	6,166	4,125
Reclassification, Tax Effect	(1,079)	(722)	(2,158)	(1,444)
Reclassification, Net of Tax	$ 2,004	$ 1,341	4,008	$ 2,681
Total, Net of Tax			$ 4,008		$ (2,415)

Other Comprehensive Income (L63

Other Comprehensive Income (Loss) (Reclassified From Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other net realized capital gains (losses)	$ 27,743	$ 34,128	$ 81,699	$ (11,338)
Income tax expense (benefit)	29,859	30,607	76,629	35,988
Net income (loss)	245,674	155,692	537,317	327,378
URA(D) On Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other underwriting expenses	(11,067)	(1,867)	(17,775)	43,779
Income tax expense (benefit)	2,074	419	6,583	(12,846)
Net income (loss)	(8,993)	(1,448)	(11,192)	30,933
URA(D) On Securities [Member] \| Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other net realized capital gains (losses)	(11,067)	(1,867)	(17,775)	43,779
Income tax expense (benefit)	2,074	419	6,583	(12,846)
Net income (loss)	(8,993)	(1,448)	(11,192)	30,933
Benefit Plan Net Gain (Loss)[Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other underwriting expenses	3,083	2,063	6,166	4,125
Income tax expense (benefit)	(1,079)	(722)	(2,158)	(1,444)
Net income (loss)	$ 2,004	$ 1,341	$ 4,008	$ 2,681

Other Comprehensive Income (L64

Other Comprehensive Income (Loss) (Components Of Accumulated Other Comprehensive Income (Loss), Net Of Tax, In The Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period			$ 8,075,396
Current period change	$ 33,546	$ 129,299	64,792	$ 315,755
Balance, end of period	8,584,798	7,985,468	8,584,798	7,985,468	$ 8,075,396
URA(D) On Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period			115,558	42,811	42,811
Current period change			17,383		66,802
Balance, end of period	128,782		128,782		115,558
URA(D) On Securities OTTI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Current period change			(4,159)		5,945
Foreign Currency Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period			(266,818)	(211,477)	(211,477)
Current period change			47,560		(55,341)
Balance, end of period	(219,258)		(219,258)		(266,818)
Benefit Plan Net Gain (Loss)[Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period			(65,504)	(63,089)	(63,089)
Current period change			4,008		(2,415)
Balance, end of period	(61,496)		(61,496)		(65,504)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, beginning of period	(185,518)	(45,299)	(216,764)	(231,755)	(231,755)
Current period change	33,546	129,299	64,792	315,755
Balance, end of period	$ (151,972)	$ 84,000	$ (151,972)	$ 84,000	$ (216,764)

Credit Facilities (Narrative) (

Credit Facilities (Narrative) (Details) £ in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017GBP (£)item	Dec. 31, 2015	Jun. 30, 2017USD ($)item	Dec. 31, 2016GBP (£)	Dec. 31, 2016USD ($)
Line of Credit Facility [Line Items]
Line of credit facility, number of facilities \| item	2
Line of credit facility, commitment			$ 1,000,000
Wells Fargo Bank Group Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, number of tranches \| item	2		2
Line of credit facility, term of credit facility	4 years
Line of credit facility, commitment			$ 800,000		$ 800,000
Line of credit facility, required minimum debt-to-capital ratio	0.35		0.35
Line of credit facility, required minimum net worth			$ 5,370,979
Percentage amount of consolidated net income required to be reserved to maintain compliance with facility covenants	25.00%
Percentage amount of increase in consolidated net worth from new issuance required to be reserved to maintain compliance with facility covenants	25.00%
Increase in reserves due to new issuance during the period required to maintain compliance with facility covenants			5,721,181
Wells Fargo Bank Group Credit Facility [Member] \| Before Amended And Restated Agreement [Member]
Line of Credit Facility [Line Items]
Line of credit facility, term of credit facility	5 years
Line of credit facility, commitment			800,000
Wells Fargo Bank Group Credit Facility Tranche One [Member]
Line of Credit Facility [Line Items]
Line of credit facility, commitment			200,000		200,000
Wells Fargo Bank Group Credit Facility Tranche One [Member] \| Interest Rate Base Rate Option 1(b) [Member]
Line of Credit Facility [Line Items]
Line of credit facility, spread on variable rate basis	0.50%
Wells Fargo Bank Group Credit Facility Tranche One [Member] \| Interest Rate Base Rate Option 1(c) [Member]
Line of Credit Facility [Line Items]
Line of credit facility, spread on variable rate basis	1.00%
Wells Fargo Bank Group Credit Facility Tranche Two [Member]
Line of Credit Facility [Line Items]
Line of credit facility, commitment			600,000
Citibank Holdings Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, term of credit facility	3 years
Citibank Bilateral Agreement [Member]
Line of Credit Facility [Line Items]
Line of credit facility, commitment			$ 200,000		$ 200,000
Per annum commitment fee on undrawn credit	0.15%
Citibank Bilateral Agreement [Member] \| Interest Rate Base Rate Option 1(a) [Member]
Line of Credit Facility [Line Items]
Percentage of interest on the principal amount of letters of credit issued	0.35%
Maximum term allowed to execute issued letters of credit	15 months
Citibank Bilateral Agreement [Member] \| Interest Rate Base Rate Option 1(b) [Member]
Line of Credit Facility [Line Items]
Percentage of interest on the principal amount of issued extended tenor letters of credit	0.45%
Maximum term allowed to execute issued letters of credit	60 months
Everest International Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, required minimum debt-to-capital ratio	0.35		0.35
Line of credit facility, required minimum net worth			$ 5,326,009
Consolidated net worth, percentage		70.00%
Percentage amount of consolidated net income required to be reserved to maintain compliance with facility covenants	25.00%
Percentage amount of increase in consolidated net worth from new issuance required to be reserved to maintain compliance with facility covenants	25.00%
Increase in reserves due to new issuance during the period required to maintain compliance with facility covenants			$ 5,721,181
Lloyds Bank plc Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, initiation date	Nov. 9, 2016
Line of credit facility, term of credit facility	4 years
Line of credit facility, commitment \| £	£ 145,000			£ 140,000
Percentage commitment fee per annum	0.10%
Per annum commitment fee on undrawn credit	0.35%

Credit Facilities (Summary Of C

Credit Facilities (Summary Of Costs Incurred Connection With Credit Facilities) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Credit Facilities [Abstract]
Credit facility interest and fees incurred	$ 106	$ 213	$ 210	$ 583

Credit Facilities (Summary Of O

Credit Facilities (Summary Of Outstanding Letters Of Credit And/Or Borrowings) (Details) £ in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017GBP (£)	Dec. 31, 2016GBP (£)	Jun. 30, 2017USD ($)	Dec. 31, 2016USD ($)
Line of Credit Facility [Line Items]
Commitment			$ 1,000,000
Wells Fargo Bank Group Credit Facility Tranche One [Member]
Line of Credit Facility [Line Items]
Commitment			200,000	$ 200,000
In Use
Wells Fargo Bank Group Credit Facility Tranche Two Issuance One [Member]
Line of Credit Facility [Line Items]
Commitment			600,000	600,000
In Use			471,219	478,233
Date of Expiry	Dec. 31, 2017	Dec. 31, 2017
Wells Fargo Bank Group Credit Facility [Member]
Line of Credit Facility [Line Items]
Commitment			800,000	800,000
In Use			471,219	478,233
Citibank Bilateral Letter Of Credit Agreement One [Member]
Line of Credit Facility [Line Items]
Commitment			200,000	200,000
In Use			3,672	4,058
Date of Expiry	Nov. 24, 2017	Feb. 28, 2017
Citibank Bilateral Letter Of Credit Agreement Two [Member]
Line of Credit Facility [Line Items]
In Use			67,672	3,672
Date of Expiry	Dec. 31, 2017	Nov. 24, 2017
Citibank Bilateral Letter Of Credit Agreement Three [Member]
Line of Credit Facility [Line Items]
In Use			3,297	69,404
Date of Expiry	Feb. 28, 2018	Dec. 31, 2017
Citibank Bilateral Letter Of Credit Agreement Four [Member]
Line of Credit Facility [Line Items]
In Use			281	269
Date of Expiry	Aug. 30, 2018	Aug. 30, 2018
Citibank Bilateral Letter Of Credit Agreement Five [Member]
Line of Credit Facility [Line Items]
In Use			3,780	1,163
Date of Expiry	Dec. 31, 2018
Citibank Bilateral Letter Of Credit Agreement Six [Member]
Line of Credit Facility [Line Items]
In Use			100,632	93,180
Date of Expiry	Jun. 30, 2021	Dec. 30, 2020
Citibank Bilateral Agreement [Member]
Line of Credit Facility [Line Items]
Commitment			200,000	200,000
In Use			$ 179,334	$ 171,746
Lloyds Bank PLC [Member]
Line of Credit Facility [Line Items]
Commitment \| £	£ 145,000	£ 140,000
In Use \| £	£ 140,964	£ 130,606
Date of Expiry	Dec. 31, 2020	Dec. 31, 2019
Lloyds Bank plc Credit Facility [Member]
Line of Credit Facility [Line Items]
Commitment \| £	£ 145,000	£ 140,000
In Use \| £	£ 140,964	£ 130,606

Collateralized Reinsurance An68

Collateralized Reinsurance And Trust Agreements (Narrative) (Details) $ in Thousands	Apr. 13, 2017USD ($)item	Dec. 01, 2015USD ($)item	Nov. 18, 2014USD ($)	Apr. 24, 2014USD ($)item	Jun. 30, 2017USD ($)	Dec. 31, 2016USD ($)
Effects of Reinsurance [Line Items]
Amount on deposit in trust accounts					$ 774,703
Preferred shares invested
Kilimanjaro Re Limited [Member]
Effects of Reinsurance [Line Items]
Number of collateralized reinsurance agreements \| item	6	2		2
Kilimanjaro Re Limited [Member] \| Catastrophe Reinsurance [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount			$ 500,000
Kilimanjaro Re Limited [Member] \| Catastrophe Reinsurance Agreement 1 Through 3 [Member]
Effects of Reinsurance [Line Items]
Number of collateralized reinsurance agreements \| item	3
Reinsurance Contrants	4 years
Kilimanjaro Re Limited [Member] \| Catastrophe Reinsurance Agreement 4 Through 6 [Member]
Effects of Reinsurance [Line Items]
Number of collateralized reinsurance agreements \| item	3
Reinsurance Contrants	5 years
Kilimanjaro Re Limited [Member] \| Catastrophe Reinsurance Agreement 1 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	$ 225,000	$ 300,000		$ 250,000
Catastrophe reinsurance bonds funded amount	950,000	625,000		450,000
Kilimanjaro Re Limited [Member] \| Catastrophe Reinsurance Agreement 2 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	400,000	$ 325,000		$ 200,000
Catastrophe reinsurance bonds funded amount	300,000		$ 500,000
Kilimanjaro Re Limited [Member] \| Catastrophe Reinsurance Agreement 3 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	325,000
Kilimanjaro Re Limited [Member] \| Catastrophe Reinsurance Agreement 4 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	50,000
Kilimanjaro Re Limited [Member] \| Catastrophe Reinsurance Agreement 5 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	75,000
Kilimanjaro Re Limited [Member] \| Catastrophe Reinsurance Agreement 6 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	$ 175,000
Mt. Logan Re [Member]
Effects of Reinsurance [Line Items]
Percentage of voting common shares owned by Group					100.00%
Assumed net risk exposures					$ 941,836	932,243
Preferred shares invested					$ 55,850	$ 55,536

Collateralized Reinsurance An69

Collateralized Reinsurance And Trust Agreements (Premiums And Losses Ceded By The Company To Affiliate) (Details) - Mt. Logan Re Segregated Accounts [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Effects of Reinsurance [Line Items]
Ceded written premiums	$ 42,728	$ 36,178	$ 96,946	$ 92,846
Ceded earned premiums	57,886	47,945	98,483	90,849
Ceded losses and LAE	24,812	18,973	44,397	29,734
Assumed written premiums	3,763	3,073	6,495	6,634
Assumed earned premiums	3,763	3,073	6,495	6,634
Assumed losses and LAE

Senior Notes (Narrative) (Detai

Senior Notes (Narrative) (Details) - Senior Notes [Member] - 4.868% Senior notes due 6/1/2044 [Member] - USD ($)	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Date Issued	Jun. 5, 2014
Principal amounts	$ 400,000,000
Debt Instrument, Term	30 years
Debt instrument, stated interest rate	4.868%	4.868%
Maturity Date	Jun. 1, 2044

Senior Notes (Schedule Of Outst

Senior Notes (Schedule Of Outstanding Senior Notes) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Consolidated balance sheet amount	$ 396,774,000	$ 396,714,000
4.868% Senior notes due 6/1/2044 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	4.868%	4.868%
Date issued	Jun. 5, 2014
Date due	Jun. 1, 2044
Principal amounts	$ 400,000,000
Consolidated balance sheet amount	396,774,000	$ 396,714,000
Market value	$ 421,764,000	$ 383,612,000

Senior Notes (Schedule Of Inter

Senior Notes (Schedule Of Interest Expense Incurred In Connection With Senior Notes) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Senior Notes [Abstract]
Interest expense incurred	$ 4,868	$ 4,868	$ 9,736	$ 9,736

Long Term Subordinated Notes (N

Long Term Subordinated Notes (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Redemption date	May 1, 2047
Long Term Subordinated Notes [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	6.60%	6.60%
Maturity Date	May 1, 2067
Reset quarterly interest rate	3.56678%
Percentage of principal amount required for redemption	100.00%
Outstanding debt reduction	$ 161,441
Fixed Rate Interest Period [Member] \| Long Term Subordinated Notes [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	6.60%
Interest payment commencement date	Nov. 15, 2007
Interest basis, term of LIBOR rate	3 months
Interest basis, 3 month LIBOR plus number of basis points, reset quarterly	2.385%
Right to defer interest on one or more occasions for up to number of consecutive years	10 years
Fixed Rate Interest Period [Member] \| Long Term Subordinated Notes [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest payment date	May 3, 2007
Fixed Rate Interest Period [Member] \| Long Term Subordinated Notes [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest payment date	May 14, 2017
Floating Rate Interest Period [Member] \| Long Term Subordinated Notes [Member]
Debt Instrument [Line Items]
Right to defer interest on one or more occasions for up to number of consecutive years	10 years
5.4% Senior notes due 10/15/2014 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	5.40%
Maturity Date	Oct. 15, 2014
4.868% Senior notes due 6/1/2044 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	4.868%	4.868%
Maturity Date	Jun. 1, 2044

Long Term Subordinated Notes (S

Long Term Subordinated Notes (Schedule Of Outstanding Fixed To Floating Rate Long Term Subordinated Notes) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Consolidated balance sheet amount	$ 236,511,000	$ 236,462,000
Long Term Subordinated Notes [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	6.60%	6.60%
Date Issued	Apr. 26, 2007
Original Principal Amount	$ 400,000,000
Maturity Date	May 1, 2067
Consolidated balance sheet amount	$ 236,511,000	$ 236,462,000
Market value	$ 223,053,000	$ 204,636,000
Scheduled [Member] \| Long Term Subordinated Notes [Member]
Debt Instrument [Line Items]
Maturity Date	May 15, 2037
Final [Member] \| Long Term Subordinated Notes [Member]
Debt Instrument [Line Items]
Maturity Date	May 1, 2067

Long Term Subordinated Notes 75

Long Term Subordinated Notes (Schedule Of Interest Expense Incurred In Connection With Long Term Subordinated Notes) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Long Term Subordinated Notes [Abstract]
Interest expense incurred	$ 3,033	$ 3,937	$ 6,970	$ 7,874

Segment Reporting (Schedule Of

Segment Reporting (Schedule Of Underwriting Results For Operating Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Premiums earned	$ 1,369,681	$ 1,288,860	$ 2,681,778	$ 2,507,727
Incurred losses and LAE	861,275	857,816	1,632,063	1,558,565
Commission and brokerage	299,956	295,502	582,225	570,508
Other underwriting expenses	78,869	72,077	154,756	144,187
U.S. Reinsurance [Member]
Segment Reporting Information [Line Items]
Gross written premiums	474,993	405,530	1,053,951	942,235
Net written premiums	385,267	341,616	902,636	812,307
Premiums earned	478,494	473,273	960,018	959,814
Incurred losses and LAE	267,621	219,590	529,687	456,034
Commission and brokerage	112,423	120,624	214,781	237,941
Other underwriting expenses	14,278	12,132	28,529	25,591
Underwriting gain (loss)	84,172	120,927	187,021	240,248
International [Member]
Segment Reporting Information [Line Items]
Gross written premiums	319,786	340,625	586,203	576,216
Net written premiums	272,369	281,201	518,031	483,701
Premiums earned	263,816	290,601	535,397	541,051
Incurred losses and LAE	172,488	261,864	331,989	409,399
Commission and brokerage	64,847	66,678	130,997	130,964
Other underwriting expenses	9,814	7,969	19,294	15,792
Underwriting gain (loss)	16,667	(45,910)	53,117	(15,104)
Bermuda [Member]
Segment Reporting Information [Line Items]
Gross written premiums	237,570	161,930	558,692	366,662
Net written premiums	217,814	148,441	522,846	332,755
Premiums earned	263,457	200,277	498,563	394,705
Incurred losses and LAE	165,305	109,829	293,737	221,350
Commission and brokerage	63,486	59,886	121,909	109,808
Other underwriting expenses	9,022	8,320	18,502	17,505
Underwriting gain (loss)	25,644	22,242	64,415	46,042
Insurance [Member]
Segment Reporting Information [Line Items]
Gross written premiums	569,300	455,266	1,003,747	831,426
Net written premiums	463,683	383,695	809,434	707,647
Premiums earned	363,914	324,709	687,800	612,157
Incurred losses and LAE	255,861	266,533	476,650	471,782
Commission and brokerage	59,200	48,314	114,538	91,795
Other underwriting expenses	45,755	43,656	88,431	85,299
Underwriting gain (loss)	$ 3,098	$ (33,794)	$ 8,181	$ (36,719)

Segment Reporting (Schedule O77

Segment Reporting (Schedule Of Underwriting Results For Operating Segments To Income (Loss) Before Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net investment income	$ 134,508	$ 132,737	$ 256,797	$ 235,261
Net realized capital gains (losses)	25,268	32,658	77,996	(41,601)
Net derivative gain (loss)	766	1,996	3,396	(1,024)
Corporate expenses	(6,919)	(7,117)	(15,376)	(15,003)
Interest, fee and bond issue cost amortization expense	(8,059)	(9,073)	(17,023)	(18,301)
Other income (expense)	388	(28,367)	(4,578)	(30,433)
INCOME (LOSS) BEFORE TAXES	275,533	186,299	613,946	363,366
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Underwriting gain (loss)	129,581	63,465	312,734	234,467
Net investment income	134,508	132,737	256,797	235,261
Net realized capital gains (losses)	25,268	32,658	77,996	(41,601)
Net derivative gain (loss)	766	1,996	3,396	(1,024)
Corporate expenses	(6,919)	(7,117)	(15,376)	(15,003)
Interest, fee and bond issue cost amortization expense	(8,059)	(9,073)	(17,023)	(18,301)
Other income (expense)	388	(28,367)	(4,578)	(30,433)
INCOME (LOSS) BEFORE TAXES	$ 275,533	$ 186,299	$ 613,946	$ 363,366

Segment Reporting (Schedule O78

Segment Reporting (Schedule Of Gross Written Premiums Derived From Largest Non-U.S. Market) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
United Kingdom Gross Written Premium [Member]
Segment Reporting Information [Line Items]
Gross written premiums	$ 204,965	$ 146,578	$ 375,785	$ 329,208

Share-Based Compensation Plans

Share-Based Compensation Plans (Narrative) (Details) - Restricted Shares [Member]	3 Months Ended
	Jun. 30, 2017$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation awards granted \| shares	2,540
Share-based compensation awards, grant date	May 17, 2017
Share-based compensation awards, per option fair value \| $ / shares	$ 242.225

Retirement Benefits (Summary Of

Retirement Benefits (Summary Of Pension Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Pension contributions			$ 0	$ 0
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3,299	$ 2,896	6,598	5,793
Interest cost	2,276	2,361	4,552	4,722
Expected return on plan assets	(3,154)	(2,484)	(6,309)	(4,968)
Amortization of net (income) loss	3,041	2,014	6,081	4,028
Net periodic benefit cost	5,461	4,787	10,921	9,575
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	441	438	881	876
Interest cost	249	296	498	592
Amortization of prior service cost	(33)		(66)
Amortization of net (income) loss	75	48	151	96
Net periodic benefit cost	$ 732	$ 782	$ 1,464	$ 1,564

Dispositions (Narrative) (Detai

Dispositions (Narrative) (Details) - Heartland Crop [Member] $ in Thousands	Aug. 24, 2016USD ($)
Proceeds from sale of business	$ 49,000
After-tax loss on sale	$ 12,942