Everest Re (EG) 10-Q 11 May 20 2020 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2020	May 01, 2020
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2020
Document Transition Report	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity File Number	1-15731
Entity Registrant Name	EVEREST RE GROUP, LTD.
Entity Central Index Key	0001095073
Entity Tax Identification Number	98-0365432
Entity Incorporation State Country Code	D0
Entity Address Address Line 1	Seon Place – 4th Floor
Entity Address Address Line 2	141 Front Street
Entity Address Address Line 3	PO Box HM 845
Entity Address City Or Town	Hamilton
Entity Address Postal Zip Code	HM 19
Entity Address Country	BM
City Area Code	441
Local Phone Number	295-0006
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Security 12b Title	Common Shares, $0.01 par value
Trading Symbol	RE
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		39,987,014

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
ASSETS:
Fixed maturities - available for sale, at market value (amortized cost: 2020, $16,493,187; 2019, $16,473,491, credit allowances: 2020, $21,774; 2019, $0)	$ 16,545,895	$ 16,824,944
Fixed maturities - available for sale, at fair value	4,703	5,826
Equity securities, at fair value	722,851	931,457
Short-term investments (cost: 2020, $441,707; 2019, $414,639)	441,722	414,706
Other invested assets (cost: 2020, $1,803,785; 2019, $1,763,531)	1,803,785	1,763,531
Cash	817,626	808,036
Total investments and cash	20,336,582	20,748,500
Accrued investment income	117,791	116,804
Premiums receivable	2,340,392	2,259,088
Reinsurance receivables	1,808,601	1,763,471
Funds held by reinsureds	515,076	489,901
Deferred acquisition costs	603,735	581,863
Prepaid reinsurance premiums	438,308	445,716
Income taxes	406,413	305,711
Other assets	655,740	612,997
TOTAL ASSETS	27,222,638	27,324,051
LIABILITIES:
Reserve for losses and loss adjustment expenses	13,820,504	13,611,313
Future policy benefit reserve	41,677	42,592
Unearned premium reserve	3,176,292	3,056,735
Funds held under reinsurance treaties	9,163	10,668
Other net payable to reinsurers	369,385	291,660
Loss in course of payment	50,510	51,950
Senior notes due 6/1/2044	397,104	397,074
Long term notes due 5/1/2067	235,083	236,758
Revolving credit borrowings	50,000
Accrued interest on debt and borrowings	7,589	2,878
Equity index put option liability	20,958	5,584
Unsettled securities payable	77,042	30,650
Other liabilities	386,387	453,264
Total liabilities	18,641,694	18,191,126
Commitments and contingencies (Note 9)
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; (2020) 69,624 and (2019) 69,464 outstanding before treasury shares	696	694
Additional paid-in capital	2,216,479	2,219,660
Accumulated other comprehensive income (loss), net of deferred income tax expense (benefit) of $(5,682) at 2020 and $30,996 at 2019	(269,751)	28,152
Treasury shares, at cost; 29,636 shares (2020) and 28,665 shares (2019)	(3,622,172)	(3,422,152)
Retained earnings	10,255,692	10,306,571
Total shareholders' equity	8,580,944	9,132,925
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 27,222,638	$ 27,324,051

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Fixed maturities - available for sale, at market value, amortized cost	$ 16,493,187,000	$ 16,473,491,000
Fixed maturities - available for sale, at market value, allowance for credit loss	21,774,000	0
Short-term investments, at cost	441,707,000	414,639,000
Other invested assets, at cost	$ 1,803,785,000	$ 1,763,531,000
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	69,624,000	69,464,000
Accumulated other comprehensive income (loss), net of deferred income tax expense (benefit)	$ (5,682,000)	$ 30,996,000
Treasury shares	29,636,000	28,665,000
4.868% Senior notes due 6/1/2044 [Member] | Senior Notes [Member]
Debt instrument, maturity date	Jun. 1, 2044
6.6 % Long Term Subordinated Notes [Member] | Subordinated Debt [Member]
Debt instrument, maturity date	May 1, 2067

Consolidated Statements Of Oper

Consolidated Statements Of Operations And Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
REVENUES:
Premiums earned	$ 2,036,814	$ 1,732,697
Net investment income	147,800	140,976
Net realized capital gains (losses):
Credit allowances on fixed maturity securities	(21,774)
Other-than-temporary impairments on fixed maturity securities		(2,933)
Other net realized capital gains (losses)	(188,814)	95,165
Total net realized capital gains (losses)	(210,588)	92,232
Net derivative gain (loss)	(15,373)	3,231
Other income (expense)	23,363	(3,300)
Total revenues	1,982,016	1,965,836
CLAIMS AND EXPENSES:
Incurred losses and loss adjustment expenses	1,430,840	1,048,550
Commission, brokerage, taxes and fees	448,522	389,474
Other underwriting expenses	128,860	98,985
Corporate expenses	9,833	6,652
Interest, fees and bond issue cost amortization expense	7,583	7,631
Total claims and expenses	2,025,638	1,551,292
INCOME (LOSS) BEFORE TAXES	(43,622)	414,544
Income tax expense (benefit)	(60,234)	59,993
NET INCOME (LOSS)	16,612	354,551
Other comprehensive income (loss), net of tax :
Unrealized appreciation (depreciation) ("URA(D)") on securities arising during the period	(279,398)	233,065
Reclassification adjustment for realized losses (gains) included in net income (loss)	31,399	(1,822)
Total URA(D) on securities arising during the period	(247,999)	231,243
Foreign currency translation adjustments	(50,824)	14,052
Reclassification adjustment for amortization of net (gain) loss included in net income (loss)	920	1,151
Total benefit plan net gain (loss) for the period	920	1,151
Total other comprehensive income (loss), net of tax	(297,903)	246,446
COMPREHENSIVE INCOME (LOSS)	$ (281,291)	$ 600,997
EARNINGS PER COMMON SHARE:
Basic	$ 0.41	$ 8.70
Diluted	$ 0.41	$ 8.67

Consolidated Statements Of Chan

Consolidated Statements Of Changes In Shareholders' Equity - USD ($)	Total	Common Stock Outstanding [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss), Net of Deferred Income Taxes [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Change to beginning balance due to adoption of Accounting Standards Update 2016-13						$ 0
Balance at Dec. 31, 2018			$ 692,000	$ 2,188,777,000	$ (462,557,000)	9,531,433,000	$ (3,397,548,000)
Balance, shares at Dec. 31, 2018		40,651,148
Issued during the period, net, shares		194,584
Treasury shares acquired, shares		(75,193)
Issued during the period, net			2,000
Share-based compensation plans				767,000
Net increase (decrease) during the period	$ 246,446,000				246,446,000
Net income (loss)	354,551,000					354,551,000
Dividends declared ($1.55 per share in 2020 and $1.40 per share in 2019)	(57,137,000)					(57,137,000)
Purchase of treasury shares							(16,153,000)
Balance at Mar. 31, 2019	8,389,273,000		694,000	2,189,544,000	(216,111,000)	9,828,847,000	(3,413,701,000)
Balance, shares at Mar. 31, 2019		40,770,539
Change to beginning balance due to adoption of Accounting Standards Update 2016-13						(4,214,000)
Balance at Dec. 31, 2019	$ 9,132,925,000		694,000	2,219,660,000	28,152,000	10,306,571,000	(3,422,152,000)
Balance, shares at Dec. 31, 2019	69,464,000	40,798,963
Issued during the period, net, shares		159,423
Treasury shares acquired, shares		(970,892)
Issued during the period, net			2,000
Share-based compensation plans				(3,181,000)
Net increase (decrease) during the period	$ (297,903,000)				(297,903,000)
Net income (loss)	16,612,000					16,612,000
Dividends declared ($1.55 per share in 2020 and $1.40 per share in 2019)	(63,277,000)					(63,277,000)
Purchase of treasury shares							(200,020,000)
Balance at Mar. 31, 2020	$ 8,580,944,000		$ 696,000	$ 2,216,479,000	$ (269,751,000)	10,255,692,000	$ (3,622,172,000)
Balance, shares at Mar. 31, 2020	69,624,000	39,987,494
Change to beginning balance due to adoption of Accounting Standards Update 2016-13						$ (4,214,000)

Consolidated Statements Of Ch_2

Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Consolidated Statements Of Changes In Shareholders' Equity [Abstract]
Dividends declared	$ 1.55	$ 1.40

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 16,612	$ 354,551
Adjustments to reconcile net income to net cash provided by operating activities:
Decrease (increase) in premiums receivable	(119,548)	(168,377)
Decrease (increase) in funds held by reinsureds, net	(28,973)	9,353
Decrease (increase) in reinsurance receivables	(130,593)	34,556
Decrease (increase) in income taxes	(65,114)	91,856
Decrease (increase) in prepaid reinsurance premiums	(10,572)	(11,677)
Increase (decrease) in reserve for losses and loss adjustment expenses	406,257	58,073
Increase (decrease) in future policy benefit reserve	(915)	103
Increase (decrease) in unearned premiums	158,744	135,157
Increase (decrease) in other net payable to reinsurers	95,555	63,326
Increase (decrease) in losses in course of payment	(1,422)	(66,714)
Change in equity adjustments in limited partnerships	(8,512)	(8,079)
Distribution of limited partnership income	11,108	14,799
Change in other assets and liabilities, net	(45,259)	30,152
Non-cash compensation expense	9,393	9,056
Amortization of bond premium (accrual of bond discount)	8,640	5,899
Net realized capital (gains) losses	210,588	(92,232)
Net cash provided by (used in) operating activities	505,989	459,802
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from fixed maturities matured/called - available for sale, at market value	656,070	460,537
Proceeds from fixed maturities sold - available for sale, at market value	501,953	1,798,226
Proceeds from equity securities sold, at fair value	112,841	69,500
Distributions from other invested assets	104,085	54,692
Cost of fixed maturities acquired - available for sale, at market value	(1,359,281)	(2,249,663)
Cost of equity securities acquired, at fair value	(76,513)	(146,435)
Cost of other invested assets acquired	(152,269)	(115,028)
Net change in short-term investments	(27,882)	(354,388)
Net change in unsettled securities transactions	(17,185)	49,809
Net cash provided by (used in) investing activities	(258,181)	(432,750)
CASH FLOWS FROM FINANCING ACTIVITIES:
Common shares issued during the period for share-based compensation, net of expense	(12,573)	(8,288)
Purchase of treasury shares	(200,020)	(16,153)
Dividends paid to shareholders	(63,277)	(57,137)
Proceeds from revolving credit borrowings	50,000
Cost of debt repurchase	(1,198)
Cost of shares withheld on settlements of share-based compensation awards	(13,982)	(11,443)
Net cash provided by (used in) financing activities	(241,050)	(93,021)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	2,832	(6,152)
Net increase (decrease) in cash	9,590	(72,121)
Cash, beginning of period	808,036	656,095
Cash, end of period	817,626	583,974
SUPPLEMENTAL CASH FLOW INFORMATION:
Income taxes paid (recovered)	4,920	(90,846)
Interest paid	$ 2,817	$ 3,154

General

General	3 Months Ended
	Mar. 31, 2020
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.

Basis Of Presentation

Basis Of Presentation	3 Months Ended
	Mar. 31, 2020
Basis Of Presentation [Abstract]
Basis Of Presentation	2. BASIS OF PRESENTATION The unaudited consolidated financial statements of the Company as of March 31, 2020 and December 31, 2019 and for the three months ended March 31, 2020 and 2019 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, 2019 consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by GAAP. The results for the three months ended March 31, 2020 and 2019 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, 2019, 2018 and 2017 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. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities (and disclosure of contingent assets and liabilities) at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Ultimate actual results could differ, possibly materially, from those estimates. This is particularly true given the fluid and continuing nature of the COVID-19 pandemic. This is an ongoing event and so is the Company’s evaluation and analysis. While the Company’s analysis considers all aspects of its operations, it does not take into account legal, regulatory or legislative intervention that could retroactively mandate or expand coverage provisions. Given the uncertainties in the current public health and economic environment, there could be an adverse impact on results for the Property & Casualty industry and the Company for the remainder of the year. The impact is dependent on the shape and length of the economic recovery. With recent changes in executive management and organizational structure, the Company manages its reinsurance and insurance operations as autonomous units and key strategic decisions are based on the aggregate operating results and projections for these segments of business. Accordingly, effective January 1, 2020, the Company revised it reporting segments to Reinsurance Operations and Insurance Operations. This replaces the previous reported segments of U.S. Reinsurance, International (reinsurance), Bermuda (reinsurance) and Insurance. The prior year presented segment information has been reformatted to reflect this change. All intercompany accounts and transactions have been eliminated. Certain reclassifications and format changes have been made to prior years’ amounts to conform to the 2020 presentation. Application of Recently Issued Accounting Standard Changes. Accounting for Income Taxes . In December 2019, The Financial Accounting Standards Board (“FASB”) issued ASU 2019-12, which provides simplification of existing guidance for income taxes, including the removal of certain exceptions related to recognition of deferred tax liabilities on foreign subsidiaries. The guidance is effective for annual reporting periods beginning after December 15, 2020 and interim periods within that annual reporting period. The Company is currently evaluating the impact of the adoption of ASU 2019-12 on its financial statements. Simplification of Disclosure Requirements. In August 2018, the Securities and Exchange Commission (“SEC”) issued Final Rule Release #33-10532 (“the Rule”) which addresses the simplification of the SEC’s disclosure requirements for quarterly and annual financial reports. The main changes addressed by the Rule that are applicable to the Company are 1) elimination of the requirement to disclose dividend per share information on the face of the Statements of Operations and Comprehensive Income (Loss) and 2) a new requirement to disclose changes in equity by line item with subtotals for each interim reporting period on the Statements of Changes in Shareholders’ Equity. The Rule became effective for all financial reports filed after November 5, 2018 (30 days after its publication in the Federal Register), except for the additional requirement for the Statements of Changes in Shareholders’ Equity which was to be implemented for first quarter 2019 reporting. The Company has adopted the portions of the Rule that became effective November 5, 2018. The portion of the Rule related to the new requirement for the Statements of Changes in Shareholders’ Equity was adopted by the Company in the first quarter of 2019. Accounting for Cloud Computing Arrangement. In August 2018, FASB issued ASU 2018-15, which outlines accounting for implementation costs of a cloud computing arrangement that is a service contract. This guidance requires that implementation costs of a cloud computing arrangement that is a service contract must be capitalized and expensed in accordance with the existing provisions provided in Subtopic 350-40 regarding development of internal use software. In addition, any capitalized implementation costs should be amortized over the term of the hosting arrangement. The guidance is effective for annual reporting periods beginning after December 15, 2019 and interim periods within that annual reporting period. The Company adopted the guidance as of January 1, 2020. The adoption of ASU 2018-15 did not have a material impact on the Company’s financial statements. Accounting for Long Duration Contracts. In August 2018, FASB issued ASU 2018-12, which discusses changes to the recognition, measurement and presentation of long duration contracts. The main provisions of this guidance address the following: 1) In determining liability for future policy benefits, companies must review cash flow assumptions at least annually and the discount rate assumption at each reporting period date 2) Amortization of deferred acquisition costs has been simplified to be in constant level proportion to either premiums, gross profits or gross margins 3) Disaggregated roll forwards of beginning and ending liabilities for future policy benefits are required. The guidance was originally effective for annual reporting periods beginning after December 15, 2020 and interim periods within that annual reporting period. However, FASB issued ASU 2019-09 in November 2019 which defers the effective date of ASU 2018-12 until annual reporting periods beginning after December 15, 2021. The Company is currently evaluating the impact of the adoption of ASU 2018-12 on its financial statements. Accounting for Impact on Income Taxes due to Tax Reform. In December 2017, the SEC issued Staff Accounting Bulletin (“SAB”) 118 which provides guidance on the application of FASB Accounting Standards Codification (“ASC”) Topic 740, Income Taxes, due to the enactment of TCJA. SAB 118 became effective upon release. The Company has adopted the provisions of SAB 118 with respect to measuring the tax effects for the modifications to the determination of tax basis loss reserves. In 2018, the Company recorded adjustments to the amount of tax expense it recorded in 2017 with respect to the TCJA as estimated amounts were finalized, which did not have a material impact on the Company’s financial statements. Amortization of Bond Premium. In March 2017, FASB issued ASU 2017-08 which outlines guidance on the amortization period for premium on callable debt securities. The new guidance requires that the premium on callable debt securities be amortized through the earliest call date rather than through the maturity date of the callable security. The guidance is effective for annual and interim reporting periods beginning after December 15, 2018. The Company adopted the guidance effective January 1, 2019. The adoption of ASU 2017-08 did not have a material impact on the Company’s financial statements. Valuation of Financial Instruments. In June 2016, FASB issued ASU 2016-13 (and has subsequently issued related guidance and amendments in ASU 2019-11 and ASU 2019-10 in November 2019) which outline guidance on the valuation of and accounting for assets measured at amortized cost and available for sale debt securities. The carrying value of assets measured at amortized cost will now be presented as the amount expected to be collected on the financial asset (amortized cost less an allowance for credit losses valuation account). Available for sale debt securities will now record credit losses through an allowance for credit losses, which will be limited to the amount by which fair value is below amortized cost. The guidance is effective for annual and interim reporting periods beginning after December 15, 2019. The Company adopted the guidance effective January 1, 2020. The adoption resulted in a cumulative reduction of $ 4,214 thousand in retained earnings, which is disclosed separately within the Consolidated Statements of Shareholders’ Equity. Leases . In February 2016, FASB issued ASU 2016-02 (and subsequently issued ASU 2018-11 in July, 2018) which outline new guidance on the accounting for leases. The new guidance requires the recognition of lease assets and lease liabilities on the balance sheets for most leases that were previously deemed operating leases and required only lease expense presentation in the statements of operations. The guidance is effective for annual and interim reporting periods beginning after December 15, 2018. The Company adopted ASU 2016-02 effective January 1, 2019 and elected to utilize a cumulative-effect adjustment to the opening balance of retained earnings for the year of adoption. Accordingly, the Company’s reporting for the comparative periods prior to adoption continue to be presented in the financial statements in accordance with previous lease accounting guidance. The Company also elected to apply the package of practical expedients applicable to the Company in the updated guidance for transition for leases in effect at adoption. The Company did not elect the hindsight practical expedient to determine the lease term of existing leases (e.g. The Company did not re-assess lease renewals, termination options nor purchase options in determining lease terms). The adoption of the updated guidance resulted in the Company recognizing a right-of-use asset of $ 69,869 thousand as part of other assets 77,270 thousand as part of other liabilities zero. The adoption of the updated guidance did not have a material effect on the Company’s results of operations or liquidity. Any issued guidance and pronouncements, other than those directly referenced above, are deemed by the Company to be either not applicable or immaterial to its financial statements.

Revisions To Financial Statemen

Revisions To Financial Statements	3 Months Ended
	Mar. 31, 2020
Revisions To Financial Statements [Abstract]
Revisions To Financial Statements	3. REVISIONS TO FINANCIAL STATEMENTS In preparing third quarter 2019 financial statements, the Company identified errors in the handling of foreign exchange related to premium funds held from reinsureds. Although management determined that the impact of the foreign exchange differences were not material to prior period financial statements, the impact of recording the cumulative difference would have significantly impacted results within the third quarter 2019. As a result, prior period balances have been revised in the applicable financial statements and corresponding footnotes to correct the foreign exchange adjustments. Management assessed the materiality of this change within prior period financial statements based upon SEC Staff Accounting Bulletin Number 99, Materiality, which is since codified in Accounting Standards Codification ("ASC") 250, Accounting Changes and Error Corrections. The prior period comparative financial statements that are presented herein have been revised. The following tables present line items for prior period financial statements that have been affected by the revision. For these line items, the tables detail the amounts as previously reported, the impact upon those line items due to the revision, and the amounts as currently revised within the financial statements. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended March 31, 2019 AND COMPREHENSIVE INCOME (LOSS): As Previously Impact of Reported Revisions As Revised (Dollars in thousands) Revenues: Other income (expense) $ ( 9,053) $ 5,753 $ ( 3,300) Total revenues $ 1,960,083 $ 5,753 $ 1,965,836 INCOME (LOSS) BEFORE TAXES $ 408,791 $ 5,753 $ 414,544 Income tax expense (benefit) 59,891 102 59,993 NET INCOME (LOSS) $ 348,900 $ 5,651 $ 354,551 COMPREHENSIVE INCOME (LOSS) $ 595,346 $ 5,651 $ 600,997 EARNINGS PER COMMON SHARE: Basic $ 8.57 $ 0.13 $ 8.70 Diluted $ 8.54 $ 0.13 $ 8.67 CONSOLIDATED STATEMENTS OF Three Months Ended March 31, 2019 CHANGES IN STOCKHOLDER'S EQUITY As Previously Impact of Reported Revisions As Revised (Dollars in thousands) RETAINED EARNINGS: Balance, January 1 $ 9,574,440 $ ( 43,007) $ 9,531,433 Net income (loss) 348,900 5,651 354,551 Balance, March 31 9,866,203 ( 37,356) 9,828,847 CONSOLIDATED STATEMENTS OF CASH FLOWS Three Months Ended March 31, 2019 As Previously Impact of Reported Revisions As Revised (Dollars in thousands) CASH FLOWS FROM OPERATING ACTIVITIES: Net income (loss) $ 348,900 $ 5,651 $ 354,551 Decrease (increase) in premiums receivable ( 163,108) ( 5,269) ( 168,377) Decrease (increase) in funds held by reinsureds, net 9,837 ( 484) 9,353 Decrease (increase) in income taxes 91,754 102 91,856

Investments

Investments	3 Months Ended
	Mar. 31, 2020
Investments [Abstract]
Investments	4. INVESTMENTS Effective January 1, 2020, the Company adopted ASU 2016-13 which provides guidance on the accounting for fixed maturity securities. The guidance requires the Company to record allowances for credit losses for securities that are deemed to have valuation deterioration due to credit risk issues. The initial table below presents the amortized cost, allowance for credit losses, gross unrealized appreciation/(depreciation) and market value of fixed maturity securities as of March 31, 2020 in accordance with ASU 2016-13 guidance. The second table presents the amortized cost, gross unrealized appreciation/(depreciation), market value and other-than-temporary impairments (“OTTI”) in AOCI as of December 31, 2019, in accordance with previously applicable guidance. At March 31, 2020 Amortized Allowance for Unrealized Unrealized Market (Dollars in thousands) Cost Credit Losses Appreciation Depreciation Value Fixed maturity securities U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,346,812 $ - $ 86,893 $ ( 894) $ 1,432,811 Obligations of U.S. states and political subdivisions 508,158 - 21,737 ( 4,993) 524,902 Corporate securities 6,422,137 ( 17,305) 145,334 ( 202,844) 6,347,322 Asset-backed securities 981,323 - 1,987 ( 79,157) 904,153 Mortgage-backed securities Commercial 816,098 - 29,302 ( 5,301) 840,099 Agency residential 2,156,914 - 67,111 ( 2,854) 2,221,171 Non-agency residential 4,153 - - ( 156) 3,997 Foreign government securities 1,471,398 ( 519) 57,335 ( 50,496) 1,477,718 Foreign corporate securities 2,786,194 ( 3,950) 105,630 ( 94,152) 2,793,722 Total fixed maturity securities $ 16,493,187 ( 21,774) $ 515,329 $ ( 440,847) $ 16,545,895 At December 31, 2019 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 $ 1,489,660 $ 28,357 $ ( 2,214) $ 1,515,803 $ - Obligations of U.S. states and political subdivisions 507,353 29,651 ( 89) 536,915 - Corporate securities 6,227,661 185,052 ( 37,767) 6,374,946 469 Asset-backed securities 892,373 6,818 ( 1,858) 897,333 - Mortgage-backed securities Commercial 814,570 31,236 ( 1,249) 844,557 - Agency residential 2,173,099 36,361 ( 10,879) 2,198,581 - Non-agency residential 5,723 - ( 20) 5,703 - Foreign government securities 1,492,315 47,148 ( 33,513) 1,505,950 71 Foreign corporate securities 2,870,737 107,999 ( 33,580) 2,945,156 447 Total fixed maturity securities $ 16,473,491 $ 472,622 $ ( 121,169) $ 16,824,944 $ 987 (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 March 31, 2020 At December 31, 2019 Amortized Market Amortized Market (Dollars in thousands) Cost Value Cost Value Fixed maturity securities – available for sale: Due in one year or less $ 1,344,371 $ 1,344,301 $ 1,456,960 $ 1,457,919 Due after one year through five years 6,615,039 6,631,502 6,757,107 6,869,359 Due after five years through ten years 3,689,664 3,742,527 3,471,370 3,609,816 Due after ten years 885,625 858,145 902,289 941,676 Asset-backed securities 981,323 904,153 892,373 897,333 Mortgage-backed securities: Commercial 816,098 840,099 814,570 844,557 Agency residential 2,156,914 2,221,171 2,173,099 2,198,581 Non-agency residential 4,153 3,997 5,723 5,703 Total fixed maturity securities $ 16,493,187 $ 16,545,895 $ 16,473,491 $ 16,824,944 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 March 31, (Dollars in thousands) 2020 2019 Increase (decrease) during the period between the market value and cost of investments carried at market value, and deferred taxes thereon: Fixed maturity securities $ ( 277,023) $ 253,894 Fixed maturity securities, other-than-temporary impairment - ( 244) Change in unrealized appreciation (depreciation), pre-tax ( 277,023) 253,650 Deferred tax benefit (expense) 29,024 ( 22,477) Deferred tax benefit (expense), other-than-temporary impairment - 70 Change in unrealized appreciation (depreciation), net of deferred taxes, included in shareholders’ equity $ ( 247,999) $ 231,243 The Company reviews all of its fixed maturity, available for sale securities whose fair value has fallen below their amortized cost at the time of review. The Company then assesses whether the decline in value is temporary or credit related. In making its assessment, the Company evaluates the current market and interest rate environment as well as specific issuer information. Generally, a change in a security’s value caused by a change in the market, interest rate or foreign exchange environment does not constitute a credit impairment, but rather a temporary decline in market value. Temporary declines in market value are recorded as unrealized losses in accumulated other comprehensive income (loss). If the Company intends to sell the security or is more likely than not to sell the security, the Company records the entire fair value adjustment in net realized capital gains (losses) in the Company’s consolidated statements of operations and comprehensive income (loss). If the Company determines that the decline is credit related and the Company does not have the intent to sell the security; and it is more likely than not that the Company will not have to sell the security before recovery of its cost basis, the Company establishes a credit allowance equal to the estimated credit loss and is recorded in net realized capital gains (losses) in the Company’s consolidated statements of operations and comprehensive income (loss). The amount of the allowance for a given security will generally be the difference between a discounted cash flow model and the Company’s carrying value. The fair value adjustment that is non-credit related is recorded as a component of other comprehensive income (loss), net of tax, and is included in accumulated other comprehensive income (loss) in the Company’s consolidated balance sheets. We will adjust the credit allowance account for future changes in credit loss estimates for a security and record this adjustment through net realized capital gains (losses) in the Company’s consolidated statements of operations and comprehensive income (loss). The Company does not create an allowance for uncollectible interest. If interest is not received when due, the interest receivable is immediately reversed and no additional interest is accrued. If future interest is received that has not been accrued, it is recorded as income at that time. Prior to the adoption of ASU 2016-13 effective January 1, 2020, estimated credit losses were recorded as adjustments to the carrying value of the security and any subsequent improvement in market value were recorded through other comprehensive income. 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. 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 March 31, 2020 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 $ 12,543 $ ( 59) $ 9,003 $ ( 835) $ 21,546 $ ( 894) Obligations of U.S. states and political subdivisions 78,392 ( 4,745) 3,309 ( 248) 81,701 ( 4,993) Corporate securities 2,298,849 ( 135,869) 196,450 ( 66,975) 2,495,299 ( 202,844) Asset-backed securities 661,772 ( 70,133) 121,979 ( 9,024) 783,751 ( 79,157) Mortgage-backed securities Commercial 89,848 ( 4,325) 17,004 ( 976) 106,852 ( 5,301) Agency residential 54,106 ( 1,263) 132,631 ( 1,591) 186,737 ( 2,854) Non-agency residential 652 ( 15) 3,314 ( 141) 3,966 ( 156) Foreign government securities 331,099 ( 11,540) 198,695 ( 38,956) 529,794 ( 50,496) Foreign corporate securities 984,854 ( 56,831) 253,965 ( 37,321) 1,238,819 ( 94,152) Total fixed maturity securities $ 4,512,115 $ ( 284,780) $ 936,350 $ ( 156,067) $ 5,448,465 $ ( 440,847) Duration of Unrealized Loss at March 31, 2020 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 $ 289,680 $ ( 5,701) $ 167,508 $ ( 26,447) $ 457,188 $ ( 32,148) Due in one year through five years 1,856,090 ( 88,884) 392,979 ( 57,252) 2,249,069 ( 146,136) Due in five years through ten years 1,337,038 ( 95,295) 59,440 ( 9,244) 1,396,478 ( 104,539) Due after ten years 222,929 ( 19,164) 41,495 ( 51,392) 264,424 ( 70,556) Asset-backed securities 661,772 ( 70,133) 121,979 ( 9,024) 783,751 ( 79,157) Mortgage-backed securities 144,606 ( 5,603) 152,949 ( 2,708) 297,555 ( 8,311) Total fixed maturity securities $ 4,512,115 $ ( 284,780) $ 936,350 $ ( 156,067) $ 5,448,465 $ ( 440,847) The aggregate market value and gross unrealized losses related to investments in an unrealized loss position at March 31, 2020 were $ 5,448,465 thousand and $ 440,847 thousand, respectively. The market value of securities for the single issuer whose securities comprised the largest unrealized loss position at March 31, 2020, did not exceed 0.03% of the overall market value of the Company’s fixed maturity securities. In addition, as indicated on the above table, there was no significant concentration of unrealized losses in any one market sector. The $ 284,780 thousand of unrealized losses related to fixed maturity securities that have been in an unrealized loss position for less than one year were generally comprised of domestic and foreign corporate securities, asset-backed securities and foreign government securities. Of these unrealized losses, $ 220,751 thousand were related to securities that were rated investment grade by at least one nationally recognized statistical rating agency. The $ 156,067 thousand of unrealized losses related to fixed maturity securities in an unrealized loss position for more than one year related primarily to domestic and foreign corporate securities, foreign government securities and asset-backed securities. Of these unrealized losses, $ 96,914 thousand were related to securities that were rated investment grade by at least one nationally recognized statistical rating agency. There was no 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 security before recovery of its 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, 2019 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 $ 85,527 $ ( 1,005) $ 249,371 $ ( 1,209) $ 334,898 $ ( 2,214) Obligations of U.S. states and political subdivisions 4,600 ( 38) 5,522 ( 51) 10,122 ( 89) Corporate securities 547,120 ( 9,877) 395,369 ( 27,890) 942,489 ( 37,767) Asset-backed securities 176,222 ( 1,027) 94,190 ( 831) 270,412 ( 1,858) Mortgage-backed securities Commercial 83,127 ( 689) 23,063 ( 560) 106,190 ( 1,249) Agency residential 344,267 ( 1,834) 488,680 ( 9,045) 832,947 ( 10,879) Non-agency residential 332 - 3,976 ( 20) 4,308 ( 20) Foreign government securities 210,766 ( 4,770) 283,648 ( 28,743) 494,414 ( 33,513) Foreign corporate securities 278,403 ( 7,553) 365,808 ( 26,027) 644,211 ( 33,580) Total fixed maturity securities $ 1,730,364 $ ( 26,793) $ 1,909,627 $ ( 94,376) $ 3,639,991 $ ( 121,169) Duration of Unrealized Loss at December 31, 2019 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 $ 67,879 $ ( 1,237) $ 416,583 $ ( 23,004) $ 484,462 $ ( 24,241) Due in one year through five years 464,753 ( 7,960) 689,195 ( 38,138) 1,153,948 ( 46,098) Due in five years through ten years 495,741 ( 12,388) 103,612 ( 11,100) 599,353 ( 23,488) Due after ten years 98,043 ( 1,658) 90,328 ( 11,678) 188,371 ( 13,336) Asset-backed securities 176,222 ( 1,027) 94,190 ( 831) 270,412 ( 1,858) Mortgage-backed securities 427,726 ( 2,523) 515,719 ( 9,625) 943,445 ( 12,148) Total fixed maturity securities $ 1,730,364 $ ( 26,793) $ 1,909,627 $ ( 94,376) $ 3,639,991 $ ( 121,169) The aggregate market value and gross unrealized losses related to investments in an unrealized loss position at December 31, 2019 were $ 3,639,991 thousand and $ 121,169 thousand, respectively. The market value of securities for the single issuer whose securities comprised the largest unrealized loss position at December 31, 2019, did not exceed 0.8% of the overall market value of the Company’s fixed maturity securities. In addition, as indicated on the above table, there was no significant concentration of unrealized losses in any one market sector. The $ 26,793 thousand of unrealized losses related to fixed maturity securities that have been in an unrealized loss position for less than one year were generally comprised of domestic and foreign corporate securities and foreign government securities. Of these unrealized losses, $ 23,104 thousand were related to securities that were rated investment grade by at least one nationally recognized statistical rating agency. The $ 94,376 thousand of unrealized losses related to fixed maturity securities in an unrealized loss position for more than one year related primarily to domestic and foreign corporate securities, foreign government securities and agency residential mortgage-backed securities. Of these unrealized losses, $ 73,144 thousand were related to securities that were rated investment grade by at least one nationally recognized statistical rating agency. There was no The components of net investment income are presented in the table below for the periods indicated: Three Months Ended March 31, (Dollars in thousands) 2020 2019 Fixed maturities $ 137,924 $ 126,708 Equity securities 3,521 3,507 Short-term investments and cash 2,175 4,205 Other invested assets Limited partnerships 21,568 8,297 Other ( 13,071) 2,980 Gross investment income before adjustments 152,117 145,697 Funds held interest income (expense) 8,216 5,968 Future policy benefit reserve income (expense) ( 211) ( 234) Gross investment income 160,122 151,431 Investment expenses ( 12,322) ( 10,455) Net investment income $ 147,800 $ 140,976 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 $ 1,365,631 thousand in limited partnerships and private placement loans at March 31, 2020. These commitments will be funded when called in accordance with the partnership and loan agreements, which have investment periods that expire, unless extended, through 2026 The Company participates in a private placement liquidity sweep facility (“the facility”). The primary purpose of the facility is to enhance the Company’s return on its short-term investments and cash positions. The facility invests in high quality, short-duration securities and permits daily liquidity. The Company consolidates its participation in the facility. As of March 31, 2020, the market value of investments in the facility consolidated within the Company’s balance sheets was $ 339,983 thousand. The components of net realized capital gains (losses) are presented in the tables below for the periods indicated: Three Months Ended March 31, (Dollars in thousands) 2020 2019 Fixed maturity securities, market value: Allowance for credit losses $ ( 21,774) $ - Other-than-temporary impairments - ( 2,933) Gains (losses) from sales ( 14,076) 5,273 Fixed maturity securities, fair value: Gains (losses) from sales - - Gains (losses) from fair value adjustments ( 1,123) 13 Equity securities, fair value: Gains (losses) from sales ( 27,599) 5,048 Gains (losses) from fair value adjustments ( 144,003) 84,441 Other invested assets ( 2,327) 396 Short-term investments gain (loss) 314 ( 6) Total net realized capital gains (losses) $ ( 210,588) $ 92,232 Foreign Foreign Corporate Government Corporate Securities Securities Securities Total Balance as of December 31, 2019 $ - $ - $ - $ - Provision for credit losses ( 17,305) ( 519) ( 3,950) ( 21,774) Balance as of March 31, 2020 $ ( 17,305) $ ( 519) $ ( 3,950) $ ( 21,774) The Company recorded as net realized capital gains (losses) in the consolidated statements of operations and comprehensive income (loss) fair value re-measurements, allowances for credit losses per ASU 2016-13 and write-downs in the value of securities deemed to be impaired on an other-than-temporary basis in prior years 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 March 31, (Dollars in thousands) 2020 2019 Proceeds from sales of fixed maturity securities $ 501,953 $ 1,798,226 Gross gains from sales 14,001 16,138 Gross losses from sales ( 28,077) ( 10,865) Proceeds from sales of equity securities $ 112,841 $ 69,500 Gross gains from sales 2,584 5,675 Gross losses from sales ( 30,183) ( 627)

Reserve For Losses, LAE And Fut

Reserve For Losses, LAE And Future Policy Benefit Reserve	3 Months Ended
	Mar. 31, 2020
Reserve For Losses, LAE And Future Policy Benefit Reserve [Abstract]
Reserve For Losses, LAE And Future Policy Benefit Reserve	5. RESERVE FOR LOSSES, LAE AND FUTURE POLICY BENEFIT RESERVE Activity in the reserve for losses and LAE is summarized for the periods indicated: Three Months Ended March 31, (Dollars in thousands) 2020 2019 Gross reserves beginning of period $ 13,611,313 $ 13,119,090 Less reinsurance recoverables ( 1,640,712) ( 1,619,641) Net reserves beginning of period 11,970,601 11,499,449 Incurred related to: Current year 1,433,440 1,050,116 Prior years ( 2,600) ( 1,566) Total incurred losses and LAE 1,430,840 1,048,550 Paid related to: Current year 168,528 103,688 Prior years 907,790 817,006 Total paid losses and LAE 1,076,318 920,694 Foreign exchange/translation adjustment and cumulative adjustment due to adoption of ASU 2016-13 ( 156,565) ( 1,496) Net reserves end of period 12,168,558 11,625,810 Plus reinsurance recoverables 1,651,946 1,621,292 Gross reserves end of period $ 13,820,504 $ 13,247,102 (Some amounts may not reconcile due to rounding.) Current year incurred losses were $ 1,433,440 thousand and $ 1,050,116 thousand for the three months ended March 31, 2020 and 2019, respectively. The increase in current year incurred losses in 2020 compared to 2019 was primarily due to $ 150,000 thousand of incurred losses due to COVID-19 as well as the impact of the increase in premiums earned.

Derivatives

Derivatives	3 Months Ended
	Mar. 31, 2020
Derivatives [Abstract]
Derivatives	6. DERIVATIVES The Company sold seven equity index put option contracts, based on two indices, in 2001 and 2005. The Company sold these equity index put options as insurance products with the intent of achieving a profit. These equity index put option contracts meet the definition of a derivative under FASB guidance and the Company’s position in these equity index put option contracts is unhedged. Accordingly, these equity index put option contracts are carried at fair value in the consolidated balance sheets with changes in fair value recorded in the consolidated statements of operations and comprehensive income (loss). Five of these contracts had expired prior to March 31, 2020 with no liabilities due under the terms of the expired contracts. The Company had one remaining equity index put option contract at March 31, 2020, based on the Standard & Poor’s 500 (“S&P 500”) index. Based on historical index volatilities and trends and the March 31, 2020 S&P 500 index value, the Company estimates the probability that the equity index put option contract of the S&P 500 index falling below the strike price on the exercise date to be less than 3%. The theoretical maximum payout under this equity index put option contract would occur if on the exercise date the S&P 500 index value was zero. At March 31, 2020, the present value of the theoretical maximum payout using a 3% discount factor was $ 144,636 thousand. Conversely, if the contract had expired on March 31, 2020, with the S&P index at 2,584.59, there would have been no settlement amount. The Company has one equity index put option contract based on the FTSE 100 index. Based on historical index volatilities and trends and the March 31, 2020 FTSE 100 index value, the Company estimates the probability that the equity index put option contract of the FTSE 100 index will fall below the strike price on the exercise date to be approximately 70%. The theoretical maximum payout under the equity index put option contract would occur if on the exercise date the FTSE 100 index value was zero. At March 31, 2020, the present value of the theoretical maximum payout using a 3% discount factor and current exchange rate was $ 40,003 thousand. Conversely, if the contract had expired on March 31, 2020, with the FTSE index at 5,671.96, there would have been a settlement amount of $ 2,142 thousand. At March 31, 2020 and December 31, 2019, the fair value for these equity put options was $ 20,958 thousand and $ 5,584 thousand, respectively. 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 March 31, 2020 December 31, 2019 Equity index put option contracts Equity index put option liability $ 20,958 $ 5,584 Total $ 20,958 $ 5,584 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 Derivatives not designated as Location of gain (loss) in statements of March 31, hedging instruments operations and comprehensive income (loss) 2020 2019 Equity index put option contracts Net derivative gain (loss) $ ( 15,373) $ 3,231 Total $ ( 15,373) $ 3,231

Fair Value

Fair Value	3 Months Ended
	Mar. 31, 2020
Fair Value [Abstract]
Fair Value	7. 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 managing publicly traded securities 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. At March 31, 2020, $ 951,712 thousand of fixed maturities, market value and $ 4,703 thousand of fixed maturities, fair value were fair valued using unobservable inputs. The majority of the fixed maturities, market value, $ 722,948 thousand, were valued by investment managers’ valuation committees and many of these fair values and all of the $ 4,703 thousand of fixed maturities, fair value were substantiated by valuations from independent third parties. The Company has procedures in place to review and evaluate these independent third party valuations. The remaining Level 3 fixed maturities of $ 228,765 thousand were valued at either par or amortized cost, which the Company believes approximates fair value. At December 31, 2019, $ 772,979 thousand of fixed maturities, market value and $ 5,826 thousand of fixed maturities, fair value were fair valued using unobservable inputs. The majority of the fixed maturities, market value, $ 610,873 thousand, were valued by investment managers’ valuation committees and a majority of these fair values and all of the $ 5,826 thousand of fixed maturities, fair value were substantiated by valuations from independent third parties. The Company has procedures in place to review and evaluate these independent third party valuations. The remaining Level 3 fixed maturities of $ 162,106 thousand were valued at either par or amortized cost, which the Company believes approximates fair value. The Company internally manages a public equity portfolio which had a fair value at March 31, 2020 and December 31, 2019 of $ 210,845 thousand and $ 170,888 thousand, respectively, and all prices were obtained from publicly published sources. 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 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’s liability for equity index put options is categorized as level 3 since there is no active market for these 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) March 31, 2020 (Level 1) (Level 2) (Level 3) Assets: Fixed maturities, market value U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,432,811 $ - $ 1,432,811 $ - Obligations of U.S. States and political subdivisions 524,902 - 524,902 - Corporate securities 6,347,322 - 5,634,241 713,081 Asset-backed securities 904,153 - 665,522 238,631 Mortgage-backed securities Commercial 840,099 - 840,099 - Agency residential 2,221,171 - 2,221,171 - Non-agency residential 3,997 - 3,997 - Foreign government securities 1,477,718 - 1,477,718 - Foreign corporate securities 2,793,722 - 2,793,722 - Total fixed maturities, market value 16,545,895 - 15,594,183 951,712 Fixed maturities, fair value 4,703 - - 4,703 Equity securities, fair value 722,851 666,266 56,585 - Liabilities: Equity index put option contracts $ 20,958 $ - $ - $ 20,958 There were no transfers between Level 1 and Level 2 for the three months ended March 31, 2020. 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, 2019 (Level 1) (Level 2) (Level 3) Assets: Fixed maturities, market value U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,515,803 $ - $ 1,515,803 $ - Obligations of U.S. States and political subdivisions 536,915 - 536,915 - Corporate securities 6,374,946 - 5,757,358 617,588 Asset-backed securities 897,333 - 743,692 153,641 Mortgage-backed securities Commercial 844,557 - 844,557 - Agency residential 2,198,581 - 2,198,581 - Non-agency residential 5,703 - 5,703 - Foreign government securities 1,505,950 - 1,505,950 - Foreign corporate securities 2,945,156 - 2,943,406 1,750 Total fixed maturities, market value 16,824,944 - 16,051,965 772,979 Fixed maturities, fair value 5,826 - - 5,826 Equity securities, fair value 931,457 864,584 66,873 - Liabilities: Equity index put option contracts $ 5,584 $ - $ - $ 5,584 In addition, $ 212,677 thousand and $ 209,578 thousand of investments within other invested assets on the consolidated balance sheets as March 31, 2020 and December 31, 2019, respectively, are not included within the fair value hierarchy tables as the assets are measured at NAV as a practical expedient to determine fair value. The following tables present the activity under Level 3, fair value measurements using significant unobservable inputs by asset type, for the periods indicated: Total Fixed Maturities, Market Value Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 Corporate Asset-Backed Foreign Corporate Foreign (Dollars in thousands) Securities Securities Corporate Total Securities Corporate Total Beginning balance fixed maturities at market value $ 617,588 $ 153,641 $ 1,750 $ 772,979 $ 428,215 $ 7,744 $ 435,959 Total gains or (losses) (realized/unrealized) - Included in earnings ( 214) 4 - ( 210) 4,858 119 4,977 Included in other comprehensive income (loss) ( 3,357) ( 15,882) - ( 19,239) 573 - 573 Purchases, issuances and settlements 99,064 100,868 ( 1,750) 198,182 6,638 ( 565) 6,073 Transfers in and/or (out) of Level 3 - - - - ( 2,458) - ( 2,458) Ending balance $ 713,081 $ 238,631 $ - $ 951,712 $ 437,826 $ 7,298 $ 445,124 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 $ ( 539) $ - $ - $ ( 539) $ - $ - $ - (Some amounts may not reconcile due to rounding.) Total Fixed Maturities, Fair Value Three Months Ended March 31, 2020 Three Months Ended March 31, 2020 Foreign Foreign (Dollars in thousands) Corporate Total Corporate Total Beginning balance fixed maturities at market value $ 5,826 $ 5,826 $ 2,337 $ 2,337 Total gains or (losses) (realized/unrealized) Included in earnings ( 1,123) ( 1,123) 13 13 Included in other comprehensive income (loss) - - - - Purchases, issuances and settlements - - - - Transfers in and/or (out) of Level 3 - - - - Ending balance $ 4,703 $ 4,703 $ 2,350 $ 2,350 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.) The net transfers to/(from) level 3, fair value measurements using significant unobservable inputs for fixed maturities, market value were $ 0 2,458) thousand for the three months ended March 31, 2020 and 2019, respectively. The transfers during 2019 were related to securities that were priced using investment managers as of December 31, 2018 and were subsequently priced by a recognized pricing service as of March 31, 2019. 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 March 31, (Dollars in thousands) 2020 2019 Liabilities: Balance, beginning of period $ 5,584 $ 11,958 Total (gains) or losses (realized/unrealized) Included in earnings 15,373 ( 3,231) Included in other comprehensive income (loss) - - Purchases, issuances and settlements - - Transfers in and/or (out) of Level 3 - - Balance, end of period $ 20,958 $ 8,727 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	3 Months Ended
	Mar. 31, 2020
Earnings Per Common Share [Abstract]
Earnings Per Common Share	8. 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 March 31, (Dollars in thousands, except per share amounts) 2020 2019 Net income (loss) per share: Numerator Net income (loss) $ 16,612 $ 354,551 Less: dividends declared-common shares and nonvested common shares ( 63,277) ( 57,137) Undistributed earnings ( 46,666) 297,415 Percentage allocated to common shareholders (1) 98.7 % 99.0 % ( 46,082) 294,298 Add: dividends declared-common shareholders 62,488 56,531 Numerator for basic and diluted earnings per common share $ 16,406 $ 350,829 Denominator Denominator for basic earnings per weighted-average common shares 40,204 40,304 Effect of dilutive securities: Options 92 141 Denominator for diluted earnings per adjusted weighted-average common shares 40,296 40,445 Per common share net income (loss) Basic $ 0.41 $ 8.70 Diluted $ 0.41 $ 8.67 (1) Basic weighted-average common shares outstanding 40,204 40,304 Basic weighted-average common shares outstanding and nonvested common shares expected to vest 40,713 40,731 Percentage allocated to common shareholders 98.7 % 99.0 % (Some amounts may not reconcile due to rounding.) There were no anti-diluted options outstanding for the three months ended March 31, 2020 and 2019. All outstanding options expire on or between February 24, 2021 and September 19, 2022.

Commitments And Contingencies

Commitments And Contingencies	3 Months Ended
	Mar. 31, 2020
Commitments And Contingencies [Abstract]
Commitments And Contingencies	9. 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 March 31, At December 31, (Dollars in thousands) 2020 2019 The Prudential $ 141,281 $ 141,703 Unaffiliated life insurance company 33,116 35,082

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2020
Other Comprehensive Income (Loss) [Abstract]
Other Comprehensive Income (Loss)	10. OTHER COMPREHENSIVE INCOME (LOSS) The following table presents the components of comprehensive income (loss) in the consolidated statements of operations for the periods indicated: Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 (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 $ ( 315,200) $ 35,802 $ ( 279,398) $ 256,630 $ ( 23,391) $ 233,239 URA(D) on securities - OTTI - - - ( 244) 70 ( 174) Reclassification of net realized losses (gains) included in net income (loss) 38,177 ( 6,778) 31,399 ( 2,736) 914 ( 1,822) Foreign currency translation adjustments ( 58,723) 7,899 ( 50,824) 16,598 ( 2,546) 14,052 Benefit plan actuarial net gain (loss) - - - - - - Reclassification of benefit plan liability amortization included in net income (loss) 1,165 ( 245) 920 1,457 ( 306) 1,151 Total other comprehensive income (loss) $ ( 334,581) $ 36,678 $ ( 297,903) $ 271,705 $ ( 25,259) $ 246,446 The following table presents details of the amounts reclassified from AOCI for the periods indicated: Three Months Ended March 31, Affected line item within the statements of AOCI component 2020 2019 operations and comprehensive income (loss) (Dollars in thousands) URA(D) on securities $ 38,177 $ ( 2,736) Other net realized capital gains (losses) ( 6,778) 914 Income tax expense (benefit) $ 31,399 $ ( 1,822) Net income (loss) Benefit plan net gain (loss) $ 1,165 $ 1,457 Other underwriting expenses ( 245) ( 306) Income tax expense (benefit) $ 920 $ 1,151 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: Three Months Ended March 31, (Dollars in thousands) 2020 2019 Beginning balance of URA (D) on securities $ 304,425 $ ( 179,392) Current period change in URA (D) of investments - temporary ( 247,999) 231,417 Current period change in URA (D) of investments - non-credit OTTI - ( 174) Ending balance of URA (D) on securities 56,426 51,851 Beginning balance of foreign currency translation adjustments ( 201,717) ( 215,747) Current period change in foreign currency translation adjustments ( 50,824) 14,052 Ending balance of foreign currency translation adjustments ( 252,541) ( 201,695) Beginning balance of benefit plan net gain (loss) ( 74,556) ( 67,418) Current period change in benefit plan net gain (loss) 920 1,151 Ending balance of benefit plan net gain (loss) ( 73,636) ( 66,267) Ending balance of accumulated other comprehensive income (loss) $ ( 269,751) $ ( 216,111) (Some amounts may not reconcile due to rounding.)

Credit Facilities

Credit Facilities	3 Months Ended
	Mar. 31, 2020
Credit Facilities [Abstract]
Credit Facilities	11. CREDIT FACILITIES The Company has two active credit facilities for a total commitment of up to $ 1,000,000 thousand and an additional credit facility for a total commitment of up to £ 47,000 thousand, providing for the issuance of letters of credit and/or unsecured revolving credit lines. The following table presents the interest and fees incurred in connection with the two credit facilities for the periods indicated: Three Months Ended March 31, (Dollars in thousands) 2020 2019 Credit facility interest and fees incurred $ 123 $ 105 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 thousand senior credit facility with a syndicate of lenders, which amended and restated in its entirety the June 22, 2012, four year, $ 800,000 thousand senior credit facility. Both the May 26, 2016 and June 22, 2012 senior credit facilities, which have similar terms, are referred to as the “Group Credit Facility”. Wells Fargo Corporation (“Wells Fargo Bank”) is the administrative agent for the Group Credit Facility, which consists of two tranches. Tranche one provides up to $ 200,000 thousand of unsecured revolving credit for liquidity and general corporate purposes, and for the issuance of unsecured standby letters of credit. The interest on the revolving loans shall, at the Company’s option, be either (1) the Base Rate (as defined below) or (2) an adjusted London Interbank Offered Rate (“LIBOR”) plus a margin. The Base Rate is the higher of (a) the prime commercial lending rate established by Wells Fargo Bank, (b) the Federal Funds Rate plus 0.5% per annum or (c) the one month LIBOR Rate plus 1.0% per annum. The amount of margin and the fees payable for the Group Credit Facility depends on Group’s senior unsecured debt rating. Tranche two exclusively provides up to $ 600,000 thousand for the issuance of standby letters of credit on a collateralized basis. The Group Credit Facility requires Group to maintain a debt to capital ratio of not greater than 0.35 to 1 and to maintain a minimum net worth. Minimum net worth is an amount equal to the sum of $ 5,370,979 thousand plus 25% of consolidated net income for each of Group’s fiscal quarters, for which statements are available ending on or after March 31, 2016 and for which consolidated net income is positive, plus 25% of any increase in consolidated net worth during such period attributable to the issuance of ordinary and preferred shares, which at March 31, 2020, was $ 6,259,452 thousand. As of March 31, 2020, the Company was in compliance with all Group Credit Facility covenants. On March 25, 2020, Group borrowed $ 50,000 thousand under Tranche one of the credit facility as an unsecured revolving credit loan. The loan period is for two months with the LIBOR rate. There were no revolving credit borrowings from the facility during the year ended 2019. The following table summarizes the outstanding letters of credit and/or borrowings for the periods indicated: (Dollars in thousands) At March 31, 2020 At December 31, 2019 Bank Commitment In Use Date of Expiry Commitment In Use Date of Expiry Wells Fargo Bank Group Credit Facility Tranche One $ 200,000 $ 50,000 5/26/2020 $ 200,000 $ - Tranche One 91,816 12/31/2020 33,737 12/31/2020 Tranche Two 600,000 5,161 7/29/2020 600,000 2,381 7/29/2020 Tranche Two 1,649 9/30/2020 1,649 9/30/2020 Tranche Two 569,136 12/31/2020 573,353 12/31/2020 Tranche Two 13,215 1/4/2021 12,364 1/4/2021 Total Wells Fargo Bank Group Credit Facility $ 800,000 $ 730,977 $ 800,000 $ 623,484 Bermuda Re Letter of Credit Facility Effective December 31, 2019, 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 thousand of secured letters of credit to collateralize reinsurance obligations as a non-admitted reinsurer. The interest on drawn letters of credit shall be (A) 0.35% per annum of the principal amount of issued standard letters of credit (expiry of 15 months or less) and (B) 0.45% per annum of the principal amount of issued extended tenor letters of credit (expiry maximum of up to 60 months). The commitment fee on undrawn credit shall be 0.15% per annum. The following table summarizes the outstanding letters of credit for the periods indicated: (Dollars in thousands) At March 31, 2020 At December 31, 2019 Bank Commitment In Use Date of Expiry Commitment In Use Date of Expiry Citibank Bilateral Letter of Credit Agreement $ 200,000 $ 3,672 11/24/2020 $ 200,000 $ 4,425 02/29/2020 93,578 12/31/2020 512 09/03/2020 4,425 02/28/2021 3,672 11/24/2020 493 08/15/2021 177 12/16/2020 156 12/16/2021 125 12/20/2020 110 12/20/2021 101,404 12/31/2020 4,663 12/31/2021 559 08/15/2021 166 01/21/2024 37,096 12/30/2023 36,413 3/30/2024 - Total Citibank Bilateral Agreement $ 200,000 $ 143,676 $ 200,000 $ 147,970 Everest International Credit Facility Effective November 7, 2019, Everest International renewed its credit facility with Lloyds Bank plc (“Everest International Credit Facility”). The current renewal of the Everest International Credit Facility has a four year term and provides up to £ 47,000 thousand for the issuance of standby letters of credit on a collateralized basis. The Company pays a commitment fee of 0.1% per annum on the average daily amount of the remainder of (1) the aggregate amount available under the facility and (2) the aggregate amount of drawings outstanding under the facility. The Company pays a credit commission fee of 0.35% per annum on drawings outstanding under the facility. The Everest International Credit Facility requires Group to maintain a debt to capital ratio of not greater than 0.35 to 1 and to maintain a minimum net worth. Minimum net worth is an amount equal to the sum of $ 5,532,663 thousand ( 70% of consolidated net worth as of December 31, 2018), plus 25% of consolidated net income for each of Group’s fiscal quarters, for which statements are available ending on or after January 1, 2019 and for which net income is positive, plus 25% of any increase in consolidated net worth of Group during such period attributable to the issuance of ordinary and preferred shares, which at March 31, 2020, was $ 5,797,191 thousand. As of March 31, 2020, the Company was in compliance with all Everest International Credit Facility requirements. The following table summarizes the outstanding letters of credit for the periods indicated: (Dollars in thousands) At March 31, 2020 At December 31, 2019 Bank Commitment In Use Date of Expiry Commitment In Use Date of Expiry Lloyd's Bank plc £ 47,000 £ 47,000 12/31/2023 £ 47,000 £ 47,000 12/31/2023 - - - - Total Lloyd's Bank Credit Facility £ 47,000 £ 47,000 £ 47,000 £ 47,000 Federal Home Loan Bank Membership Effective August 15, 2019, Everest Reinsurance Company (“Everest Re”) became a member of the Federal Home Loan Banks (“FHLB”) organization, which allows Everest Re to borrow up to 10% of its statutory admitted assets. As of March 31, 2020, Everest Re had admitted assets of approximately $ 12,879,681 thousand which provides borrowing capacity of up to approximately $ 1,287,968 thousand. Through March 31, 2020, Everest had no borrowings through the FLHB.

Collateralized Reinsurance And

Collateralized Reinsurance And Trust Agreements	3 Months Ended
	Mar. 31, 2020
Collateralized Reinsurance And Trust Agreements [Abstract]
Collateralized Reinsurance And Trust Agreements	12. 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 March 31, 2020, the total amount on deposit in trust accounts was $ 1,056,172 thousand. 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% of the voting common shares are owned by Group. Separate segregated accounts for Mt. Logan Re began being established effective July 1, 2013 and non-voting, redeemable preferred shares have been issued to capitalize the segregated accounts. Each segregated account invests predominantly in a diversified set of catastrophe exposures, diversified by risk/peril and across different geographic regions globally. 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 March 31, Mt. Logan Re Segregated Accounts 2020 2019 (Dollars in thousands) Ceded written premiums 110,188 80,028 Ceded earned premiums 90,550 56,732 Ceded losses and LAE 45,115 45,613 Assumed written premiums 2,759 2,309 Assumed earned premiums 2,759 2,309 Assumed losses and LAE - - Each segregated account is permitted to assume net risk exposures equal to the amount of its available posted collateral, which in the aggregate was $ 942,548 thousand and $ 993,036 thousand at March 31, 2020 and December 31, 2019, respectively. Of this amount, Group had investments recorded at $ 50,270 thousand and $ 46,390 thousand at March 31, 2020 and December 31, 2019, respectively, in the segregated accounts. Effective April 1, 2018, the Company entered into a retroactive reinsurance transaction with one of the Mt. Logan Re segregated accounts to retrocede $ 269,198 thousand of casualty reserves held by Bermuda Re related to accident years 2002 through 2015. As consideration for entering the agreement, the Company transferred cash of $ 252,000 thousand to the Mt. Logan Re segregated account. The maximum liability to be retroceded under the agreement will be $ 319,000 thousand. The Company will retain liability for any amounts exceeding the maximum liability. On April 24, 2014, the Company entered into two collateralized reinsurance agreements with Kilimanjaro Re Limited (“Kilimanjaro”), a Bermuda based special purpose reinsurer, to provide the Company with catastrophe reinsurance coverage. These agreements are multi-year reinsurance contracts which cover specified named storm and earthquake events. The first agreement provides up to $ 250,000 thousand of reinsurance coverage from named storms in specified states of the Southeastern United States. The second agreement provides up to $ 200,000 thousand of reinsurance coverage from named storms in specified states of the Southeast, Mid-Atlantic and Northeast regions of the United States and Puerto Rico as well as reinsurance coverage from earthquakes in specified states of the Southeast, Mid-Atlantic, Northeast and West regions of the United States, Puerto Rico and British Columbia. These reinsurance agreements expired in April, 2018 On November 18, 2014, the Company entered into a collateralized reinsurance agreement with Kilimanjaro 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 thousand of reinsurance coverage from earthquakes in the United States, Puerto Rico and Canada. These reinsurance agreements expired in November 2019. On December 1, 2015 the Company entered into two collateralized reinsurance agreements with Kilimanjaro to provide the Company with catastrophe reinsurance coverage. These agreements are multi-year reinsurance contracts which cover named storm and earthquake events. The first agreement provides up to $ 300,000 thousand of reinsurance coverage from named storms and earthquakes in the United States, Puerto Rico and Canada. The second agreement provides up to $ 325,000 thousand of reinsurance coverage from named storms and earthquakes in the United States, Puerto Rico and Canada. On April 13, 2017 the Company entered into six collateralized reinsurance agreements with Kilimanjaro to provide the Company with annual aggregate catastrophe reinsurance coverage. The initial three agreements are four year reinsurance contracts which cover named storm and earthquake events. These agreements provide up to $ 225,000 thousand, $ 400,000 thousand and $ 325,000 thousand, respectively, of annual aggregate reinsurance coverage from named storms and earthquakes in the United States, Puerto Rico and Canada. The subsequent three agreements are five year reinsurance contracts which cover named storm and earthquake events. These agreements provide up to $ 50,000 thousand, $ 75,000 thousand and $ 175,000 thousand, respectively, of annual aggregate reinsurance coverage from named storms and earthquakes in the United States, Puerto Rico and Canada. On April 30, 2018 the Company entered into four collateralized reinsurance agreements with Kilimanjaro to provide the Company with catastrophe reinsurance coverage. These agreements are multi-year reinsurance contracts which cover named storm and earthquake events. The first two agreements are four year reinsurance contracts which provide up to $ 62,500 thousand and $ 200,000 thousand, respectively, of annual aggregate reinsurance coverage from named storms and earthquakes in the United States, Puerto Rico, the U.S. Virgin Islands and Canada. The remaining two agreements are five year reinsurance contracts which provide up to $ 62,500 thousand and $ 200,000 thousand, respectively, of annual aggregate reinsurance coverage from named storms and earthquakes in the United States, Puerto Rico, the U.S. Virgin Islands and Canada. On December 12, 2019, the Company entered into four collateralized reinsurance agreements with Kilimanjaro to provide the Company with catastrophe reinsurance coverage. These agreements are multi-year reinsurance contracts which cover named storm and earthquake events. The first two agreements are four year reinsurance contracts which provide up to $ 150,000 thousand and $ 275,000 thousand, respectively, of annual aggregate reinsurance coverage from named storms and earthquakes in the United States, Puerto Rico, the U.S. Virgin Islands and Canada. The remaining two agreements are five year reinsurance contracts which provide up to $ 150,000 thousand and $ 275,000 thousand, respectively, of annual aggregate reinsurance coverage from named storms and earthquakes in the United State, Puerto Rico, the U.S. Virgin Islands and Canada. Recoveries under these collateralized reinsurance agreements with Kilimanjaro are primarily dependent on estimated industry level insured losses from covered events, as well as, the geographic location of the events. The estimated industry level of insured losses is obtained from published estimates by an independent recognized authority on insured property losses. Currently, none of the published insured loss estimates for catastrophe events during the applicable covered periods of the various agreements have exceeded the single event retentions or aggregate retentions under the terms of the agreements that would result in a recovery. 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 thousand of notes (“Series 2014-1 Notes”). The $ 450,000 thousand of Series 2014-1 Notes were fully redeemed on April 30, 2018 and are no longer outstanding. On November 18, 2014, Kilimanjaro issued $ 500,000 thousand of notes (“Series 2014-2 Notes”). The $ 450,000 thousand of Series 2014-2 Notes were fully redeemed in November 2019 and are no longer outstanding. On December 1, 2015, Kilimanjaro issued $ 625,000 thousand of notes (“Series 2015-1 Notes). On April 13, 2017, Kilimanjaro issued $ 950,000 thousand of notes (“Series 2017-1 Notes) and $ 300,000 thousand of notes (“Series 2017-2 Notes). On April 30, 2018, Kilimanjaro issued $ 262,500 thousand of notes (“Series 2018-1 Notes”) and $ 262,500 thousand of notes (“Series 2018-2 Notes”). On December 12, 2019 Kilimanjaro issued $ 425,000 thousand of notes (“Series 2019-1 Notes”) and $ 425,000 of notes (“Series 2019-2 Notes”). The proceeds from the issuance of the Notes listed above are held in reinsurance trust throughout the duration of the applicable reinsurance agreements and invested solely in US government money market funds with a rating of at least “AAAm” by Standard & Poor’s.

Senior Notes

Senior Notes	3 Months Ended
	Mar. 31, 2020
Senior Notes [Abstract]
Senior Notes	13. 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. March 31, 2020 December 31, 2019 Consolidated Balance Consolidated Balance (Dollars in thousands) Date Issued Date Due Principal Amounts Sheet Amount Market Value Sheet Amount Market Value Senior notes 06-05-2014 06-01-2044 400,000 $ 397,104 $ 454,224 $ 397,074 $ 452,848 On June 5, 2014, Holdings issued $ 400,000 thousand of 30 year senior notes at 4.868%, which will mature on June 1, 2044. Interest will be paid semi-annually on June 1 and December 1 of each year. Interest expense incurred in connection with these senior notes is as follows for the periods indicated: Three Months Ended March 31, (Dollars In thousands 2020 2019 Interest expense incurred $ 4,868 $ 4,868

Long Term Subordinated Notes

Long Term Subordinated Notes	3 Months Ended
	Mar. 31, 2020
Long Term Subordinated Notes [Abstract]
Long Term Subordinated Notes	14. 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 March 31, 2020 December 31, 2019 Original Consolidated Balance Consolidated Balance (Dollars in thousands) Date Issued Principal Amount Scheduled Final Sheet Amount Market Value Sheet Amount Market Value Long term subordinated notes 04-26-2007 $ 400,000 05-15-2037 05-01-2067 $ 235,083 $ 181,834 $ 236,758 $ 233,191 During the fixed rate interest period from May 3, 2007 through May 14, 2017, interest was at the annual rate of 6.6%, payable semi-annually in arrears on November 15 and May 15 of each year, commencing on November 15, 2007. During the floating rate interest period from May 15, 2017 through maturity, interest will be based on the 3 month LIBOR plus 238.5 basis points, reset quarterly, payable quarterly in arrears on February 15, May 15, August 15 and November 15 of each year, subject to Holdings’ right to defer interest on one ten 4.08%. Holdings may redeem the long term subordinated notes on or after May 15, 2017, in whole or in part at 100% of the principal amount plus accrued and unpaid interest; however, redemption on or after the scheduled maturity date and prior to May 1, 2047 is subject to a replacement capital covenant. This covenant is for the benefit of certain senior note holders and it mandates that Holdings receive proceeds from the sale of another subordinated debt issue, of at least similar size, before it may redeem the subordinated notes. Effective upon the maturity of the Company’s 5.40% senior notes on October 15, 2014, the Company’s 4.868% senior notes, due on June 1, 2044, have become the Company’s long term indebtedness that ranks senior to the long term subordinated notes. The Company repurchased and retired $ 1,700 thousand of its outstanding long term subordinated notes during the three months ended March 31, 2020. The Company realized a gain of $ 502 thousand from the repurchase of the long term subordinated notes. 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 thousand. Interest expense incurred in connection with these long term subordinated notes is as follows for the periods indicated: Three Months Ended March 31, (Dollars in thousands) 2020 2019 Interest expense incurred $ 2,538 $ 2,605

Leases

Leases	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Leases	15. LEASES Effective January 1, 2019, the Company adopted ASU 2016-02 and ASU 2018-11 which outline new guidance on the accounting for leases. The Company enters into lease agreements for real estate that is primarily used for office space in the ordinary course of business. These leases are accounted for as operating leases, whereby lease expense is recognized on a straight-line basis over the term of the lease. Most leases include an option to extend or renew the lease term. The exercise of the renewal is at the Company’s discretion. The operating lease liability includes lease payments related to options to extend or renew the lease term if the Company is reasonably certain of exercise those options. The Company, in determining the present value of lease payments utilizes either the rate implicit in the lease if that rate is readily determinable or the Company’s incremental secured borrowing rate commensurate with terms of the underlying lease. Supplemental information related to operating leases is as follows for the periods indicated: Three Months Ended March 31, (Dollars in thousands) 2020 2019 Lease expense incurred: Operating lease cost $ 7,890 $ 5,187 At March 31, At December 31, (Dollars in thousands) 2020 2019 Operating lease right of use assets $ 156,626 $ 161,435 Operating lease liabilities 167,072 169,909 Three Months Ended March 31, (Dollars in thousands) 2020 2019 Operating cash flows from operating leases $ ( 4,919) $ ( 4,431) At March 31, At December 31, 2020 2019 Weighted average remaining operating lease term 12.4 years 12.6 years Weighted average discount rate on operating leases 3.87 % 3.91 % Maturities of the existing lease liabilities are expected to occur as follows: (Dollars in thousands) Remainder of 2020 $ 15,187 2021 17,836 2022 19,888 2023 19,099 2024 18,831 2025 15,822 Thereafter 113,475 Undiscounted lease payments 220,138 Less: present value adjustment 53,066 Total operating lease liability $ 167,072 On July 2, 2019, the Company entered into a lease agreement to relocate its corporate offices from Liberty Corner, New Jersey to a corporate complex in Warren, New Jersey. The new lease, which covers approximately 315,000 square feet of office space, will be effective October 1, 2019 and runs through 2036. The initial base rent payment of the lease will be approximately $ 650 thousand per month or $ 7,800 thousand per year. The Company expects to relocate the existing operations and employees of the Liberty Corner, New Jersey facility to the new corporate complex during 2021.

Segment Reporting

Segment Reporting	3 Months Ended
	Mar. 31, 2020
Segment Reporting [Abstract]
Segment Reporting	16. SEGMENT REPORTING The Reinsurance operation writes worldwide property and casualty reinsurance and specialty lines of business, on both a treaty and facultative basis, through reinsurance brokers, as well as directly with ceding companies. Business is written in the U.S., Bermuda, and Ireland offices, as well as, through branches in Canada, Singapore and the United Kingdom. The Insurance operation writes property and casualty insurance directly and through brokers, surplus lines brokers and general agents within the U.S., Canada and Europe through its offices in the U.S., Canada, Ireland and a branch located in Zurich. 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. 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 Reinsurance March 31, (Dollars in thousands) 2020 2019 Gross written premiums $ 1,777,771 $ 1,532,051 Net written premiums 1,613,094 1,394,553 Premiums earned $ 1,485,221 $ 1,307,519 Incurred losses and LAE 1,020,642 772,198 Commission and brokerage 370,356 322,637 Other underwriting expenses 44,139 35,769 Underwriting gain (loss) $ 50,084 $ 176,915 Three Months Ended Insurance March 31, (Dollars in thousands) 2020 2019 Gross written premiums $ 793,100 $ 595,057 Net written premiums 588,385 457,145 Premiums earned $ 551,593 $ 425,178 Incurred losses and LAE 410,198 276,352 Commission and brokerage 78,166 66,837 Other underwriting expenses 84,721 63,216 Underwriting gain (loss) $ ( 21,492) $ 18,773 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 March 31, (Dollars in thousands) 2020 2019 Underwriting gain (loss) $ 28,592 $ 195,688 Net investment income 147,800 140,976 Net realized capital gains (losses) ( 210,588) 92,232 Net derivative gain (loss) ( 15,373) 3,231 Corporate expenses ( 9,833) ( 6,652) Interest, fee and bond issue cost amortization expense ( 7,583) ( 7,631) Other income (expense) 23,363 ( 3,300) Income (loss) before taxes $ ( 43,622) $ 414,544 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 March 31, (Dollars in thousands) 2020 2019 United Kingdom gross written premium $ 306,708 $ 263,857 No other country represented more than 5% of the Company’s revenues.

Share-Based Compensation Plans

Share-Based Compensation Plans	3 Months Ended
	Mar. 31, 2020
Share-Based Compensation Plans [Abstract]
Share-Based Compensation Plans	17. SHARE-BASED COMPENSATION PLANS For the three months ended March 31, 2020, 167,829 restricted stock awards were granted on February 26, 2020, with a fair value of $ 277.145 per share and, 16,120 performance share unit awards were granted on February 26, 2020, with a fair value of $ 277.145 per unit.

Retirement Benefits

Retirement Benefits	3 Months Ended
	Mar. 31, 2020
Retirement Benefits [Abstract]
Retirement Benefits	18. RETIREMENT BENEFITS The Company maintains both qualified and non-qualified defined benefit pension plans for its U.S. employees employed prior to April 1, 2010. Generally, the Company computes the benefits based on average earnings over a period prescribed by the plans and credited length of service. The Company’s non-qualified defined benefit pension plan provided compensating pension benefits for participants whose benefits have been curtailed under the qualified plan due to Internal Revenue Code limitations. Effective January 1, 2018, participants of the Company’s non-qualified defined benefit pension plan may no longer accrue additional service benefits. Net periodic benefit cost for U.S. employees included the following components for the periods indicated: Pension Benefits Three Months Ended March 31, (Dollars in thousands) 2020 2019 Service cost $ 4,011 $ 2,276 Interest cost 2,483 2,930 Expected return on plan assets ( 5,197) ( 5,016) Amortization of net (income) loss 1,213 1,601 FAS 88 settlement charge - 104 Net periodic benefit cost $ 2,510 $ 1,895 Other Benefits Three Months Ended March 31, (Dollars in thousands) 2020 2019 Service cost $ 141 $ 286 Interest cost 215 295 Amortization of prior service cost ( 48) ( 144) Net periodic benefit cost $ 308 $ 437 The service cost component of net periodic benefit costs is included within other underwriting expenses on the consolidated statement of operations and comprehensive income (loss). In accordance with ASU 2017-07, other staff compensation costs are also primarily recorded within this line item. The Company did no t make any contributions to the qualified pension benefit plan for the three months ended March 31, 2020 and 2019, respectively.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2020
Income Taxes [Abstract]
Income Taxes	19. INCOME TAXES The Company is domiciled in Bermuda and has significant subsidiaries and/or branches in Canada, Ireland, Singapore, Switzerland, the United Kingdom, and the United States. The Company’s Bermuda domiciled subsidiaries are exempt from income taxation under Bermuda law until 2035. The Company’s non-Bermudian subsidiaries and branches are subject to income taxation at varying rates in their respective domiciles. The Company generally applies the estimated Annualized Effective Tax Rate (“AETR”) approach for calculating its tax provision for interim periods as prescribed by ASC 740-270, Interim Reporting. Under the AETR approach, the estimated annualized effective tax rate is applied to the interim year-to-date pre-tax income/loss to determine the income tax expense or benefit for the year-to-date period. If the AETR approach produces a year-to-date tax benefit which exceeds the amount which is estimated to be recoverable for the full year, then the tax benefit for the interim reporting period will be limited as prescribed under ASC 740-270 to the estimated recoverable based on the year-to-date result. The tax expense or benefit for the quarter represents the difference between the year-to-date 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/loss and annualized effective tax rate.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	20. SUBSEQUENT EVENTS The Company has evaluated known recognized and non-recognized subsequent events. The Company does not have any subsequent events to report.

Revisions To Financial Statem_2

Revisions To Financial Statements (Tables)	3 Months Ended
	Mar. 31, 2020
Revisions To Financial Statements [Abstract]
Schedule of Prior Period Financial Statements	CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended March 31, 2019 AND COMPREHENSIVE INCOME (LOSS): As Previously Impact of Reported Revisions As Revised (Dollars in thousands) Revenues: Other income (expense) $ ( 9,053) $ 5,753 $ ( 3,300) Total revenues $ 1,960,083 $ 5,753 $ 1,965,836 INCOME (LOSS) BEFORE TAXES $ 408,791 $ 5,753 $ 414,544 Income tax expense (benefit) 59,891 102 59,993 NET INCOME (LOSS) $ 348,900 $ 5,651 $ 354,551 COMPREHENSIVE INCOME (LOSS) $ 595,346 $ 5,651 $ 600,997 EARNINGS PER COMMON SHARE: Basic $ 8.57 $ 0.13 $ 8.70 Diluted $ 8.54 $ 0.13 $ 8.67 CONSOLIDATED STATEMENTS OF Three Months Ended March 31, 2019 CHANGES IN STOCKHOLDER'S EQUITY As Previously Impact of Reported Revisions As Revised (Dollars in thousands) RETAINED EARNINGS: Balance, January 1 $ 9,574,440 $ ( 43,007) $ 9,531,433 Net income (loss) 348,900 5,651 354,551 Balance, March 31 9,866,203 ( 37,356) 9,828,847 CONSOLIDATED STATEMENTS OF CASH FLOWS Three Months Ended March 31, 2019 As Previously Impact of Reported Revisions As Revised (Dollars in thousands) CASH FLOWS FROM OPERATING ACTIVITIES: Net income (loss) $ 348,900 $ 5,651 $ 354,551 Decrease (increase) in premiums receivable ( 163,108) ( 5,269) ( 168,377) Decrease (increase) in funds held by reinsureds, net 9,837 ( 484) 9,353 Decrease (increase) in income taxes 91,754 102 91,856

Investments (Tables)

Investments (Tables)	3 Months Ended
	Mar. 31, 2020
Investments [Abstract]
Summary Of Unrealized Appreciation (Depreciation) Of Available For Sale, Fixed Maturity And Equity Security Investments	At March 31, 2020 Amortized Allowance for Unrealized Unrealized Market (Dollars in thousands) Cost Credit Losses Appreciation Depreciation Value Fixed maturity securities U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,346,812 $ - $ 86,893 $ ( 894) $ 1,432,811 Obligations of U.S. states and political subdivisions 508,158 - 21,737 ( 4,993) 524,902 Corporate securities 6,422,137 ( 17,305) 145,334 ( 202,844) 6,347,322 Asset-backed securities 981,323 - 1,987 ( 79,157) 904,153 Mortgage-backed securities Commercial 816,098 - 29,302 ( 5,301) 840,099 Agency residential 2,156,914 - 67,111 ( 2,854) 2,221,171 Non-agency residential 4,153 - - ( 156) 3,997 Foreign government securities 1,471,398 ( 519) 57,335 ( 50,496) 1,477,718 Foreign corporate securities 2,786,194 ( 3,950) 105,630 ( 94,152) 2,793,722 Total fixed maturity securities $ 16,493,187 ( 21,774) $ 515,329 $ ( 440,847) $ 16,545,895 At December 31, 2019 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 $ 1,489,660 $ 28,357 $ ( 2,214) $ 1,515,803 $ - Obligations of U.S. states and political subdivisions 507,353 29,651 ( 89) 536,915 - Corporate securities 6,227,661 185,052 ( 37,767) 6,374,946 469 Asset-backed securities 892,373 6,818 ( 1,858) 897,333 - Mortgage-backed securities Commercial 814,570 31,236 ( 1,249) 844,557 - Agency residential 2,173,099 36,361 ( 10,879) 2,198,581 - Non-agency residential 5,723 - ( 20) 5,703 - Foreign government securities 1,492,315 47,148 ( 33,513) 1,505,950 71 Foreign corporate securities 2,870,737 107,999 ( 33,580) 2,945,156 447 Total fixed maturity securities $ 16,473,491 $ 472,622 $ ( 121,169) $ 16,824,944 $ 987 (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 March 31, 2020 At December 31, 2019 Amortized Market Amortized Market (Dollars in thousands) Cost Value Cost Value Fixed maturity securities – available for sale: Due in one year or less $ 1,344,371 $ 1,344,301 $ 1,456,960 $ 1,457,919 Due after one year through five years 6,615,039 6,631,502 6,757,107 6,869,359 Due after five years through ten years 3,689,664 3,742,527 3,471,370 3,609,816 Due after ten years 885,625 858,145 902,289 941,676 Asset-backed securities 981,323 904,153 892,373 897,333 Mortgage-backed securities: Commercial 816,098 840,099 814,570 844,557 Agency residential 2,156,914 2,221,171 2,173,099 2,198,581 Non-agency residential 4,153 3,997 5,723 5,703 Total fixed maturity securities $ 16,493,187 $ 16,545,895 $ 16,473,491 $ 16,824,944
Summary Of Changes In Net Unrealized Appreciation (Depreciation) For The Company's Investments	Three Months Ended March 31, (Dollars in thousands) 2020 2019 Increase (decrease) during the period between the market value and cost of investments carried at market value, and deferred taxes thereon: Fixed maturity securities $ ( 277,023) $ 253,894 Fixed maturity securities, other-than-temporary impairment - ( 244) Change in unrealized appreciation (depreciation), pre-tax ( 277,023) 253,650 Deferred tax benefit (expense) 29,024 ( 22,477) Deferred tax benefit (expense), other-than-temporary impairment - 70 Change in unrealized appreciation (depreciation), net of deferred taxes, included in shareholders’ equity $ ( 247,999) $ 231,243
Summary Of Aggregate Market Value And Gross Unrealized Depreciation Of Fixed Maturity And Equity Securities, By Security Type	Duration of Unrealized Loss at March 31, 2020 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 $ 12,543 $ ( 59) $ 9,003 $ ( 835) $ 21,546 $ ( 894) Obligations of U.S. states and political subdivisions 78,392 ( 4,745) 3,309 ( 248) 81,701 ( 4,993) Corporate securities 2,298,849 ( 135,869) 196,450 ( 66,975) 2,495,299 ( 202,844) Asset-backed securities 661,772 ( 70,133) 121,979 ( 9,024) 783,751 ( 79,157) Mortgage-backed securities Commercial 89,848 ( 4,325) 17,004 ( 976) 106,852 ( 5,301) Agency residential 54,106 ( 1,263) 132,631 ( 1,591) 186,737 ( 2,854) Non-agency residential 652 ( 15) 3,314 ( 141) 3,966 ( 156) Foreign government securities 331,099 ( 11,540) 198,695 ( 38,956) 529,794 ( 50,496) Foreign corporate securities 984,854 ( 56,831) 253,965 ( 37,321) 1,238,819 ( 94,152) Total fixed maturity securities $ 4,512,115 $ ( 284,780) $ 936,350 $ ( 156,067) $ 5,448,465 $ ( 440,847) Duration of Unrealized Loss at December 31, 2019 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 $ 85,527 $ ( 1,005) $ 249,371 $ ( 1,209) $ 334,898 $ ( 2,214) Obligations of U.S. states and political subdivisions 4,600 ( 38) 5,522 ( 51) 10,122 ( 89) Corporate securities 547,120 ( 9,877) 395,369 ( 27,890) 942,489 ( 37,767) Asset-backed securities 176,222 ( 1,027) 94,190 ( 831) 270,412 ( 1,858) Mortgage-backed securities Commercial 83,127 ( 689) 23,063 ( 560) 106,190 ( 1,249) Agency residential 344,267 ( 1,834) 488,680 ( 9,045) 832,947 ( 10,879) Non-agency residential 332 - 3,976 ( 20) 4,308 ( 20) Foreign government securities 210,766 ( 4,770) 283,648 ( 28,743) 494,414 ( 33,513) Foreign corporate securities 278,403 ( 7,553) 365,808 ( 26,027) 644,211 ( 33,580) Total fixed maturity securities $ 1,730,364 $ ( 26,793) $ 1,909,627 $ ( 94,376) $ 3,639,991 $ ( 121,169)
Summary Of Aggregate Market Value And Gross Unrealized Depreciation Of Fixed Maturity And Equity Securities, By Contractual Maturity	Duration of Unrealized Loss at March 31, 2020 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 $ 289,680 $ ( 5,701) $ 167,508 $ ( 26,447) $ 457,188 $ ( 32,148) Due in one year through five years 1,856,090 ( 88,884) 392,979 ( 57,252) 2,249,069 ( 146,136) Due in five years through ten years 1,337,038 ( 95,295) 59,440 ( 9,244) 1,396,478 ( 104,539) Due after ten years 222,929 ( 19,164) 41,495 ( 51,392) 264,424 ( 70,556) Asset-backed securities 661,772 ( 70,133) 121,979 ( 9,024) 783,751 ( 79,157) Mortgage-backed securities 144,606 ( 5,603) 152,949 ( 2,708) 297,555 ( 8,311) Total fixed maturity securities $ 4,512,115 $ ( 284,780) $ 936,350 $ ( 156,067) $ 5,448,465 $ ( 440,847) Duration of Unrealized Loss at December 31, 2019 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 $ 67,879 $ ( 1,237) $ 416,583 $ ( 23,004) $ 484,462 $ ( 24,241) Due in one year through five years 464,753 ( 7,960) 689,195 ( 38,138) 1,153,948 ( 46,098) Due in five years through ten years 495,741 ( 12,388) 103,612 ( 11,100) 599,353 ( 23,488) Due after ten years 98,043 ( 1,658) 90,328 ( 11,678) 188,371 ( 13,336) Asset-backed securities 176,222 ( 1,027) 94,190 ( 831) 270,412 ( 1,858) Mortgage-backed securities 427,726 ( 2,523) 515,719 ( 9,625) 943,445 ( 12,148) Total fixed maturity securities $ 1,730,364 $ ( 26,793) $ 1,909,627 $ ( 94,376) $ 3,639,991 $ ( 121,169)
Summary Of Components Of Net Investment Income	Three Months Ended March 31, (Dollars in thousands) 2020 2019 Fixed maturities $ 137,924 $ 126,708 Equity securities 3,521 3,507 Short-term investments and cash 2,175 4,205 Other invested assets Limited partnerships 21,568 8,297 Other ( 13,071) 2,980 Gross investment income before adjustments 152,117 145,697 Funds held interest income (expense) 8,216 5,968 Future policy benefit reserve income (expense) ( 211) ( 234) Gross investment income 160,122 151,431 Investment expenses ( 12,322) ( 10,455) Net investment income $ 147,800 $ 140,976
Summary Of Components Of Net Realized Capital Gains (Losses)	Three Months Ended March 31, (Dollars in thousands) 2020 2019 Fixed maturity securities, market value: Allowance for credit losses $ ( 21,774) $ - Other-than-temporary impairments - ( 2,933) Gains (losses) from sales ( 14,076) 5,273 Fixed maturity securities, fair value: Gains (losses) from sales - - Gains (losses) from fair value adjustments ( 1,123) 13 Equity securities, fair value: Gains (losses) from sales ( 27,599) 5,048 Gains (losses) from fair value adjustments ( 144,003) 84,441 Other invested assets ( 2,327) 396 Short-term investments gain (loss) 314 ( 6) Total net realized capital gains (losses) $ ( 210,588) $ 92,232 Foreign Foreign Corporate Government Corporate Securities Securities Securities Total Balance as of December 31, 2019 $ - $ - $ - $ - Provision for credit losses ( 17,305) ( 519) ( 3,950) ( 21,774) Balance as of March 31, 2020 $ ( 17,305) $ ( 519) $ ( 3,950) $ ( 21,774)
Summary Of Gross Gains (Losses) From Sales Of Fixed Maturity And Equity Securities	Three Months Ended March 31, (Dollars in thousands) 2020 2019 Proceeds from sales of fixed maturity securities $ 501,953 $ 1,798,226 Gross gains from sales 14,001 16,138 Gross losses from sales ( 28,077) ( 10,865) Proceeds from sales of equity securities $ 112,841 $ 69,500 Gross gains from sales 2,584 5,675 Gross losses from sales ( 30,183) ( 627)

Reserve For Losses, LAE And F_2

Reserve For Losses, LAE And Future Policy Benefit Reserve (Tables)	3 Months Ended
	Mar. 31, 2020
Reserve For Losses, LAE And Future Policy Benefit Reserve [Abstract]
Summary Of Activity In The Reserve For Losses And LAE	Three Months Ended March 31, (Dollars in thousands) 2020 2019 Gross reserves beginning of period $ 13,611,313 $ 13,119,090 Less reinsurance recoverables ( 1,640,712) ( 1,619,641) Net reserves beginning of period 11,970,601 11,499,449 Incurred related to: Current year 1,433,440 1,050,116 Prior years ( 2,600) ( 1,566) Total incurred losses and LAE 1,430,840 1,048,550 Paid related to: Current year 168,528 103,688 Prior years 907,790 817,006 Total paid losses and LAE 1,076,318 920,694 Foreign exchange/translation adjustment and cumulative adjustment due to adoption of ASU 2016-13 ( 156,565) ( 1,496) Net reserves end of period 12,168,558 11,625,810 Plus reinsurance recoverables 1,651,946 1,621,292 Gross reserves end of period $ 13,820,504 $ 13,247,102 (Some amounts may not reconcile due to rounding.)

Derivatives (Tables)

Derivatives (Tables)	3 Months Ended
	Mar. 31, 2020
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 March 31, 2020 December 31, 2019 Equity index put option contracts Equity index put option liability $ 20,958 $ 5,584 Total $ 20,958 $ 5,584 (Dollars in thousands) For the Three Months Ended Derivatives not designated as Location of gain (loss) in statements of March 31, hedging instruments operations and comprehensive income (loss) 2020 2019 Equity index put option contracts Net derivative gain (loss) $ ( 15,373) $ 3,231 Total $ ( 15,373) $ 3,231

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2020
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) March 31, 2020 (Level 1) (Level 2) (Level 3) Assets: Fixed maturities, market value U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,432,811 $ - $ 1,432,811 $ - Obligations of U.S. States and political subdivisions 524,902 - 524,902 - Corporate securities 6,347,322 - 5,634,241 713,081 Asset-backed securities 904,153 - 665,522 238,631 Mortgage-backed securities Commercial 840,099 - 840,099 - Agency residential 2,221,171 - 2,221,171 - Non-agency residential 3,997 - 3,997 - Foreign government securities 1,477,718 - 1,477,718 - Foreign corporate securities 2,793,722 - 2,793,722 - Total fixed maturities, market value 16,545,895 - 15,594,183 951,712 Fixed maturities, fair value 4,703 - - 4,703 Equity securities, fair value 722,851 666,266 56,585 - Liabilities: Equity index put option contracts $ 20,958 $ - $ - $ 20,958 Fair Value Measurement Using: Quoted Prices in Active Significant Markets for Other Significant Identical Observable Unobservable Assets Inputs Inputs (Dollars in thousands) December 31, 2019 (Level 1) (Level 2) (Level 3) Assets: Fixed maturities, market value U.S. Treasury securities and obligations of U.S. government agencies and corporations $ 1,515,803 $ - $ 1,515,803 $ - Obligations of U.S. States and political subdivisions 536,915 - 536,915 - Corporate securities 6,374,946 - 5,757,358 617,588 Asset-backed securities 897,333 - 743,692 153,641 Mortgage-backed securities Commercial 844,557 - 844,557 - Agency residential 2,198,581 - 2,198,581 - Non-agency residential 5,703 - 5,703 - Foreign government securities 1,505,950 - 1,505,950 - Foreign corporate securities 2,945,156 - 2,943,406 1,750 Total fixed maturities, market value 16,824,944 - 16,051,965 772,979 Fixed maturities, fair value 5,826 - - 5,826 Equity securities, fair value 931,457 864,584 66,873 - Liabilities: Equity index put option contracts $ 5,584 $ - $ - $ 5,584
Activity Under Level 3, Fair Value Measurements Using Significant Unobservable Inputs By Asset Type	Total Fixed Maturities, Market Value Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 Corporate Asset-Backed Foreign Corporate Foreign (Dollars in thousands) Securities Securities Corporate Total Securities Corporate Total Beginning balance fixed maturities at market value $ 617,588 $ 153,641 $ 1,750 $ 772,979 $ 428,215 $ 7,744 $ 435,959 Total gains or (losses) (realized/unrealized) - Included in earnings ( 214) 4 - ( 210) 4,858 119 4,977 Included in other comprehensive income (loss) ( 3,357) ( 15,882) - ( 19,239) 573 - 573 Purchases, issuances and settlements 99,064 100,868 ( 1,750) 198,182 6,638 ( 565) 6,073 Transfers in and/or (out) of Level 3 - - - - ( 2,458) - ( 2,458) Ending balance $ 713,081 $ 238,631 $ - $ 951,712 $ 437,826 $ 7,298 $ 445,124 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 $ ( 539) $ - $ - $ ( 539) $ - $ - $ - (Some amounts may not reconcile due to rounding.) Total Fixed Maturities, Fair Value Three Months Ended March 31, 2020 Three Months Ended March 31, 2020 Foreign Foreign (Dollars in thousands) Corporate Total Corporate Total Beginning balance fixed maturities at market value $ 5,826 $ 5,826 $ 2,337 $ 2,337 Total gains or (losses) (realized/unrealized) Included in earnings ( 1,123) ( 1,123) 13 13 Included in other comprehensive income (loss) - - - - Purchases, issuances and settlements - - - - Transfers in and/or (out) of Level 3 - - - - Ending balance $ 4,703 $ 4,703 $ 2,350 $ 2,350 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.)
Fair Value Measurements Using Significant Unobservable Inputs For Equity Index Put Option Contracts	Three Months Ended March 31, (Dollars in thousands) 2020 2019 Liabilities: Balance, beginning of period $ 5,584 $ 11,958 Total (gains) or losses (realized/unrealized) Included in earnings 15,373 ( 3,231) Included in other comprehensive income (loss) - - Purchases, issuances and settlements - - Transfers in and/or (out) of Level 3 - - Balance, end of period $ 20,958 $ 8,727 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)	3 Months Ended
	Mar. 31, 2020
Earnings Per Common Share [Abstract]
Schedule Of Net Income (Loss) Per Common Share	Three Months Ended March 31, (Dollars in thousands, except per share amounts) 2020 2019 Net income (loss) per share: Numerator Net income (loss) $ 16,612 $ 354,551 Less: dividends declared-common shares and nonvested common shares ( 63,277) ( 57,137) Undistributed earnings ( 46,666) 297,415 Percentage allocated to common shareholders (1) 98.7 % 99.0 % ( 46,082) 294,298 Add: dividends declared-common shareholders 62,488 56,531 Numerator for basic and diluted earnings per common share $ 16,406 $ 350,829 Denominator Denominator for basic earnings per weighted-average common shares 40,204 40,304 Effect of dilutive securities: Options 92 141 Denominator for diluted earnings per adjusted weighted-average common shares 40,296 40,445 Per common share net income (loss) Basic $ 0.41 $ 8.70 Diluted $ 0.41 $ 8.67 (1) Basic weighted-average common shares outstanding 40,204 40,304 Basic weighted-average common shares outstanding and nonvested common shares expected to vest 40,713 40,731 Percentage allocated to common shareholders 98.7 % 99.0 % (Some amounts may not reconcile due to rounding.)

Commitments And Contingencies (

Commitments And Contingencies (Tables)	3 Months Ended
	Mar. 31, 2020
Commitments And Contingencies [Abstract]
Summary Of Estimated Cost To Replace Annuities For Contingent Liability	At March 31, At December 31, (Dollars in thousands) 2020 2019 The Prudential $ 141,281 $ 141,703 Unaffiliated life insurance company 33,116 35,082

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2020
Other Comprehensive Income (Loss) [Abstract]
Components Of Comprehensive Income (Loss) In The Consolidated Statements Of Operations	Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 (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 $ ( 315,200) $ 35,802 $ ( 279,398) $ 256,630 $ ( 23,391) $ 233,239 URA(D) on securities - OTTI - - - ( 244) 70 ( 174) Reclassification of net realized losses (gains) included in net income (loss) 38,177 ( 6,778) 31,399 ( 2,736) 914 ( 1,822) Foreign currency translation adjustments ( 58,723) 7,899 ( 50,824) 16,598 ( 2,546) 14,052 Benefit plan actuarial net gain (loss) - - - - - - Reclassification of benefit plan liability amortization included in net income (loss) 1,165 ( 245) 920 1,457 ( 306) 1,151 Total other comprehensive income (loss) $ ( 334,581) $ 36,678 $ ( 297,903) $ 271,705 $ ( 25,259) $ 246,446
Reclassification From Accumulated Other Comprehensive Income	Three Months Ended March 31, Affected line item within the statements of AOCI component 2020 2019 operations and comprehensive income (loss) (Dollars in thousands) URA(D) on securities $ 38,177 $ ( 2,736) Other net realized capital gains (losses) ( 6,778) 914 Income tax expense (benefit) $ 31,399 $ ( 1,822) Net income (loss) Benefit plan net gain (loss) $ 1,165 $ 1,457 Other underwriting expenses ( 245) ( 306) Income tax expense (benefit) $ 920 $ 1,151 Net income (loss)
Components Of Accumulated Other Comprehensive Income (Loss), Net Of Tax, In The Consolidated Balance Sheets	Three Months Ended March 31, (Dollars in thousands) 2020 2019 Beginning balance of URA (D) on securities $ 304,425 $ ( 179,392) Current period change in URA (D) of investments - temporary ( 247,999) 231,417 Current period change in URA (D) of investments - non-credit OTTI - ( 174) Ending balance of URA (D) on securities 56,426 51,851 Beginning balance of foreign currency translation adjustments ( 201,717) ( 215,747) Current period change in foreign currency translation adjustments ( 50,824) 14,052 Ending balance of foreign currency translation adjustments ( 252,541) ( 201,695) Beginning balance of benefit plan net gain (loss) ( 74,556) ( 67,418) Current period change in benefit plan net gain (loss) 920 1,151 Ending balance of benefit plan net gain (loss) ( 73,636) ( 66,267) Ending balance of accumulated other comprehensive income (loss) $ ( 269,751) $ ( 216,111) (Some amounts may not reconcile due to rounding.)

Credit Facilities (Tables)

Credit Facilities (Tables)	3 Months Ended
	Mar. 31, 2020
Line of Credit Facility [Line Items]
Summary Of Costs Incurred Connection With Credit Facilities	Three Months Ended March 31, (Dollars in thousands) 2020 2019 Credit facility interest and fees incurred $ 123 $ 105
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 March 31, 2020 At December 31, 2019 Bank Commitment In Use Date of Expiry Commitment In Use Date of Expiry Wells Fargo Bank Group Credit Facility Tranche One $ 200,000 $ 50,000 5/26/2020 $ 200,000 $ - Tranche One 91,816 12/31/2020 33,737 12/31/2020 Tranche Two 600,000 5,161 7/29/2020 600,000 2,381 7/29/2020 Tranche Two 1,649 9/30/2020 1,649 9/30/2020 Tranche Two 569,136 12/31/2020 573,353 12/31/2020 Tranche Two 13,215 1/4/2021 12,364 1/4/2021 Total Wells Fargo Bank Group Credit Facility $ 800,000 $ 730,977 $ 800,000 $ 623,484
Citibank Bilateral Agreement [Member]
Line of Credit Facility [Line Items]
Summary Of Outstanding Letters Of Credit And/Or Borrowings	(Dollars in thousands) At March 31, 2020 At December 31, 2019 Bank Commitment In Use Date of Expiry Commitment In Use Date of Expiry Citibank Bilateral Letter of Credit Agreement $ 200,000 $ 3,672 11/24/2020 $ 200,000 $ 4,425 02/29/2020 93,578 12/31/2020 512 09/03/2020 4,425 02/28/2021 3,672 11/24/2020 493 08/15/2021 177 12/16/2020 156 12/16/2021 125 12/20/2020 110 12/20/2021 101,404 12/31/2020 4,663 12/31/2021 559 08/15/2021 166 01/21/2024 37,096 12/30/2023 36,413 3/30/2024 - Total Citibank Bilateral Agreement $ 200,000 $ 143,676 $ 200,000 $ 147,970
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 March 31, 2020 At December 31, 2019 Bank Commitment In Use Date of Expiry Commitment In Use Date of Expiry Lloyd's Bank plc £ 47,000 £ 47,000 12/31/2023 £ 47,000 £ 47,000 12/31/2023 - - - - Total Lloyd's Bank Credit Facility £ 47,000 £ 47,000 £ 47,000 £ 47,000

Collateralized Reinsurance An_2

Collateralized Reinsurance And Trust Agreements (Tables)	3 Months Ended
	Mar. 31, 2020
Collateralized Reinsurance And Trust Agreements [Abstract]
Premiums And Losses Ceded By The Company To Affiliate	Three Months Ended March 31, Mt. Logan Re Segregated Accounts 2020 2019 (Dollars in thousands) Ceded written premiums 110,188 80,028 Ceded earned premiums 90,550 56,732 Ceded losses and LAE 45,115 45,613 Assumed written premiums 2,759 2,309 Assumed earned premiums 2,759 2,309 Assumed losses and LAE - -

Senior Notes (Tables)

Senior Notes (Tables)	3 Months Ended
	Mar. 31, 2020
Senior Notes [Abstract]
Schedule Of Outstanding Senior Notes	March 31, 2020 December 31, 2019 Consolidated Balance Consolidated Balance (Dollars in thousands) Date Issued Date Due Principal Amounts Sheet Amount Market Value Sheet Amount Market Value Senior notes 06-05-2014 06-01-2044 400,000 $ 397,104 $ 454,224 $ 397,074 $ 452,848
Schedule Of Interest Expense Incurred In Connection With Senior Notes	Three Months Ended March 31, (Dollars In thousands 2020 2019 Interest expense incurred $ 4,868 $ 4,868

Long Term Subordinated Notes (T

Long Term Subordinated Notes (Tables)	3 Months Ended
	Mar. 31, 2020
Long Term Subordinated Notes [Abstract]
Schedule Of Outstanding Fixed To Floating Rate Long Term Subordinated Notes	Maturity Date March 31, 2020 December 31, 2019 Original Consolidated Balance Consolidated Balance (Dollars in thousands) Date Issued Principal Amount Scheduled Final Sheet Amount Market Value Sheet Amount Market Value Long term subordinated notes 04-26-2007 $ 400,000 05-15-2037 05-01-2067 $ 235,083 $ 181,834 $ 236,758 $ 233,191
Schedule Of Interest Expense Incurred In Connection With Long Term Subordinated Notes	Three Months Ended March 31, (Dollars in thousands) 2020 2019 Interest expense incurred $ 2,538 $ 2,605

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Supplemental Information Relating to Operating Leases	Three Months Ended March 31, (Dollars in thousands) 2020 2019 Lease expense incurred: Operating lease cost $ 7,890 $ 5,187 At March 31, At December 31, (Dollars in thousands) 2020 2019 Operating lease right of use assets $ 156,626 $ 161,435 Operating lease liabilities 167,072 169,909 Three Months Ended March 31, (Dollars in thousands) 2020 2019 Operating cash flows from operating leases $ ( 4,919) $ ( 4,431) At March 31, At December 31, 2020 2019 Weighted average remaining operating lease term 12.4 years 12.6 years Weighted average discount rate on operating leases 3.87 % 3.91 %
Maturities of Lease Liabilities	(Dollars in thousands) Remainder of 2020 $ 15,187 2021 17,836 2022 19,888 2023 19,099 2024 18,831 2025 15,822 Thereafter 113,475 Undiscounted lease payments 220,138 Less: present value adjustment 53,066 Total operating lease liability $ 167,072

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2020
Segment Reporting [Abstract]
Schedule Of Underwriting Results For Operating Segments	Three Months Ended Reinsurance March 31, (Dollars in thousands) 2020 2019 Gross written premiums $ 1,777,771 $ 1,532,051 Net written premiums 1,613,094 1,394,553 Premiums earned $ 1,485,221 $ 1,307,519 Incurred losses and LAE 1,020,642 772,198 Commission and brokerage 370,356 322,637 Other underwriting expenses 44,139 35,769 Underwriting gain (loss) $ 50,084 $ 176,915 Three Months Ended Insurance March 31, (Dollars in thousands) 2020 2019 Gross written premiums $ 793,100 $ 595,057 Net written premiums 588,385 457,145 Premiums earned $ 551,593 $ 425,178 Incurred losses and LAE 410,198 276,352 Commission and brokerage 78,166 66,837 Other underwriting expenses 84,721 63,216 Underwriting gain (loss) $ ( 21,492) $ 18,773
Schedule Of Underwriting Results For Operating Segments To Income (Loss) Before Taxes	Three Months Ended March 31, (Dollars in thousands) 2020 2019 Underwriting gain (loss) $ 28,592 $ 195,688 Net investment income 147,800 140,976 Net realized capital gains (losses) ( 210,588) 92,232 Net derivative gain (loss) ( 15,373) 3,231 Corporate expenses ( 9,833) ( 6,652) Interest, fee and bond issue cost amortization expense ( 7,583) ( 7,631) Other income (expense) 23,363 ( 3,300) Income (loss) before taxes $ ( 43,622) $ 414,544
Schedule Of Gross Written Premiums Derived From Largest Non-U.S. Market	Three Months Ended March 31, (Dollars in thousands) 2020 2019 United Kingdom gross written premium $ 306,708 $ 263,857

Retirement Benefits (Tables)

Retirement Benefits (Tables)	3 Months Ended
	Mar. 31, 2020
Defined Benefit Pension Plan [Member]
Net Periodic Benefit Cost For U.S. Employees	Pension Benefits Three Months Ended March 31, (Dollars in thousands) 2020 2019 Service cost $ 4,011 $ 2,276 Interest cost 2,483 2,930 Expected return on plan assets ( 5,197) ( 5,016) Amortization of net (income) loss 1,213 1,601 FAS 88 settlement charge - 104 Net periodic benefit cost $ 2,510 $ 1,895
Post-Retirement Plan [Member]
Net Periodic Benefit Cost For U.S. Employees	Other Benefits Three Months Ended March 31, (Dollars in thousands) 2020 2019 Service cost $ 141 $ 286 Interest cost 215 295 Amortization of prior service cost ( 48) ( 144) Net periodic benefit cost $ 308 $ 437

Basis Of Presentation (Details)

Basis Of Presentation (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Basis of Accounting [Line Items]
Operating lease right of use assets	$ 156,626,000	$ 161,435,000	$ 69,869,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]			Other assets
Operating lease liabilities	167,072,000	169,909,000	$ 77,270,000
Operating Lease, Liability, Statement of Financial Position [Extensible List]			Other liabilities
Retained Earnings [Member]
Basis of Accounting [Line Items]
Cumulative change due to ASU	$ 4,214,000	$ 4,214,000		$ 0

Revisions To Financial Statem_3

Revisions To Financial Statements (Schedule Of Prior Period Financial Statements - Operations And Comprehensive Income (Loss)) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
REVENUES:
Other income (expense)	$ 23,363	$ (3,300)
Total revenues	1,982,016	1,965,836
INCOME (LOSS) BEFORE TAXES	(43,622)	414,544
Income tax expense (benefit)	(60,234)	59,993
NET INCOME (LOSS)	16,612	354,551
COMPREHENSIVE INCOME (LOSS)	$ (281,291)	$ 600,997
EARNINGS PER COMMON SHARE:
Basic	$ 0.41	$ 8.70
Diluted	$ 0.41	$ 8.67
As Previously Reported [Member]
REVENUES:
Other income (expense)		$ (9,053)
Total revenues		1,960,083
INCOME (LOSS) BEFORE TAXES		408,791
Income tax expense (benefit)		59,891
NET INCOME (LOSS)		348,900
COMPREHENSIVE INCOME (LOSS)		$ 595,346
EARNINGS PER COMMON SHARE:
Basic		$ 8.57
Diluted		$ 8.54
Impact of Revisions [Member]
REVENUES:
Other income (expense)		$ 5,753
Total revenues		5,753
INCOME (LOSS) BEFORE TAXES		5,753
Income tax expense (benefit)		102
NET INCOME (LOSS)		5,651
COMPREHENSIVE INCOME (LOSS)		$ 5,651
EARNINGS PER COMMON SHARE:
Basic		$ 0.13
Diluted		$ 0.13

Revisions To Financial Statem_4

Revisions To Financial Statements (Schedule Of Prior Period Financial Statements - Stockholder's Equity) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	$ 9,132,925
Net income (loss)	16,612	$ 354,551
Balance	8,580,944	8,389,273
Retained Earnings [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	10,306,571	9,531,433
Net income (loss)	16,612	354,551
Balance	$ 10,255,692	9,828,847
As Previously Reported [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Net income (loss)		348,900
As Previously Reported [Member] | Retained Earnings [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance		9,574,440
Net income (loss)		348,900
Balance		9,866,203
Impact of Revisions [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Net income (loss)		5,651
Impact of Revisions [Member] | Retained Earnings [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance		(43,007)
Net income (loss)		5,651
Balance		$ (37,356)

Revisions To Financial Statem_5

Revisions To Financial Statements (Schedule Of Prior Period Financial Statements - Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 16,612	$ 354,551
Decrease (increase) in premiums receivable	(119,548)	(168,377)
Decrease (increase) in funds held by reinsureds, net	(28,973)	9,353
Decrease (increase) in income taxes	$ (65,114)	91,856
As Previously Reported [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)		348,900
Decrease (increase) in premiums receivable		(163,108)
Decrease (increase) in funds held by reinsureds, net		9,837
Decrease (increase) in income taxes		91,754
Impact of Revisions [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)		5,651
Decrease (increase) in premiums receivable		(5,269)
Decrease (increase) in funds held by reinsureds, net		(484)
Decrease (increase) in income taxes		$ 102

Investments (Narrative) (Detail

Investments (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Additional contractual commitments	$ 1,365,631,000
Contractual commitments, investment period expiration date	Jan. 1, 2026
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Aggregate market value of investments in unrealized loss position	$ 5,448,465,000	$ 3,639,991,000
Gross unrealized losses on investments in unrealized loss position	440,847,000	121,169,000
Fixed maturity securities, duration of unrealized loss, less than 12 months, gross unrealized depreciation	284,780,000	26,793,000
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation	156,067,000	94,376,000
Market value of investments	$ 16,545,895,000	$ 16,824,944,000
Fixed Maturity Securities [Member] | US Government 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	0.03%	0.80%
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	$ 220,751,000	$ 23,104,000
Fixed maturity securities, duration of unrealized loss, greater than 12 months, gross unrealized depreciation	96,914,000	73,144,000
Sub-prime and Alt-A Loans [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized depreciation	0	$ 0
Private Placement Liquidity Sweep [Member]
Schedule of Available-for-sale Securities [Line Items]
Market value of investments	$ 339,983,000

Investments (Summary Of Unreali

Investments (Summary Of Unrealized Appreciation (Depreciation) Of Available For Sale, Fixed Maturity And Equity Security Investments) (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 16,493,187,000
Allowance for Credit Losses	(21,774,000)	$ 0
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	16,493,187,000	16,473,491,000
Allowance for Credit Losses	(21,774,000)
Unrealized Appreciation	515,329,000	472,622,000
Unrealized Depreciation	(440,847,000)	(121,169,000)
Market Value	16,545,895,000	16,824,944,000
OTTI in AOCI		987,000
U.S. Treasury Securities And Obligations Of U.S. Government Agencies And Corporations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,346,812,000	1,489,660,000
Allowance for Credit Losses
Unrealized Appreciation	86,893,000	28,357,000
Unrealized Depreciation	(894,000)	(2,214,000)
Market Value	1,432,811,000	1,515,803,000
OTTI in AOCI
Obligations Of U.S. States And Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	508,158,000	507,353,000
Allowance for Credit Losses
Unrealized Appreciation	21,737,000	29,651,000
Unrealized Depreciation	(4,993,000)	(89,000)
Market Value	524,902,000	536,915,000
OTTI in AOCI
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,422,137,000	6,227,661,000
Allowance for Credit Losses	(17,305,000)
Unrealized Appreciation	145,334,000	185,052,000
Unrealized Depreciation	(202,844,000)	(37,767,000)
Market Value	6,347,322,000	6,374,946,000
OTTI in AOCI		469,000
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	981,323,000	892,373,000
Allowance for Credit Losses
Unrealized Appreciation	1,987,000	6,818,000
Unrealized Depreciation	(79,157,000)	(1,858,000)
Market Value	904,153,000	897,333,000
OTTI in AOCI
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	816,098,000	814,570,000
Allowance for Credit Losses
Unrealized Appreciation	29,302,000	31,236,000
Unrealized Depreciation	(5,301,000)	(1,249,000)
Market Value	840,099,000	844,557,000
OTTI in AOCI
Agency Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,156,914,000	2,173,099,000
Allowance for Credit Losses
Unrealized Appreciation	67,111,000	36,361,000
Unrealized Depreciation	(2,854,000)	(10,879,000)
Market Value	2,221,171,000	2,198,581,000
OTTI in AOCI
Non-Agency Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,153,000	5,723,000
Allowance for Credit Losses
Unrealized Appreciation
Unrealized Depreciation	(156,000)	(20,000)
Market Value	3,997,000	5,703,000
OTTI in AOCI
Foreign Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,471,398,000	1,492,315,000
Allowance for Credit Losses	(519,000)
Unrealized Appreciation	57,335,000	47,148,000
Unrealized Depreciation	(50,496,000)	(33,513,000)
Market Value	1,477,718,000	1,505,950,000
OTTI in AOCI		71,000
Foreign Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,786,194,000	2,870,737,000
Allowance for Credit Losses	(3,950,000)
Unrealized Appreciation	105,630,000	107,999,000
Unrealized Depreciation	(94,152,000)	(33,580,000)
Market Value	$ 2,793,722,000	2,945,156,000
OTTI in AOCI		$ 447,000

Investments (Summary Of Amortiz

Investments (Summary Of Amortized Cost And Market Value Of Fixed Maturity Securities, By Contractual Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities - available for sale, Amortized Cost	$ 16,493,187	$ 16,473,491
Fixed maturity securities - available for sale, Market Value	16,545,895	16,824,944
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	1,344,371	1,456,960
Fixed maturity securities - available for sale, Due after one year through five years, Amortized Cost	6,615,039	6,757,107
Fixed maturity securities - available for sale, Due after five years through ten years, Amortized Cost	3,689,664	3,471,370
Fixed maturity securities - available for sale, Due after ten years, Amortized Cost	885,625	902,289
Fixed maturity securities - available for sale, Due in one year or less, Market Value	1,344,301	1,457,919
Fixed maturity securities - available for sale, Due after one year through five years, Market Value	6,631,502	6,869,359
Fixed maturity securities - available for sale, Due after five years through ten years, Market Value	3,742,527	3,609,816
Fixed maturity securities - available for sale, Due after ten years, Market Value	858,145	941,676
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities - available for sale, Amortized Cost	981,323	892,373
Fixed maturity securities - available for sale, Market Value	904,153	897,333
Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities - available for sale, Amortized Cost	816,098	814,570
Fixed maturity securities - available for sale, Market Value	840,099	844,557
Agency Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities - available for sale, Amortized Cost	2,156,914	2,173,099
Fixed maturity securities - available for sale, Market Value	2,221,171	2,198,581
Non-Agency Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities - available for sale, Amortized Cost	4,153	5,723
Fixed maturity securities - available for sale, Market Value	$ 3,997	$ 5,703

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
	Mar. 31, 2020	Mar. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	$ (277,023)	$ 253,650
Deferred tax benefit (expense)	29,024	(22,477)
Deferred tax benefit (expense), other-than-temporary impairment		70
Total URA(D) on securities arising during the period	(247,999)	231,243
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax	(277,023)	253,894
Fixed Maturity Securities, Other-Than-Temporary Impairment [Member]
Schedule of Available-for-sale Securities [Line Items]
Change in unrealized appreciation (depreciation), pre-tax		$ (244)

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	Mar. 31, 2020	Dec. 31, 2019
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	$ 4,512,115	$ 1,730,364
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(284,780)	(26,793)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	936,350	1,909,627
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(156,067)	(94,376)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	5,448,465	3,639,991
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(440,847)	(121,169)
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, Duration of Unrealized Loss, Less than 12 months, Market Value	12,543	85,527
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(59)	(1,005)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	9,003	249,371
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(835)	(1,209)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	21,546	334,898
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(894)	(2,214)
Obligations Of U.S. States And Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	78,392	4,600
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(4,745)	(38)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	3,309	5,522
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(248)	(51)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	81,701	10,122
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(4,993)	(89)
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	2,298,849	547,120
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(135,869)	(9,877)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	196,450	395,369
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(66,975)	(27,890)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	2,495,299	942,489
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(202,844)	(37,767)
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	661,772	176,222
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(70,133)	(1,027)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	121,979	94,190
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(9,024)	(831)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	783,751	270,412
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(79,157)	(1,858)
Commercial 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	89,848	83,127
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(4,325)	(689)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	17,004	23,063
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(976)	(560)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	106,852	106,190
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(5,301)	(1,249)
Agency Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	54,106	344,267
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(1,263)	(1,834)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	132,631	488,680
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(1,591)	(9,045)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	186,737	832,947
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(2,854)	(10,879)
Non-Agency Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	652	332
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(15)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	3,314	3,976
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(141)	(20)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	3,966	4,308
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(156)	(20)
Foreign Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	331,099	210,766
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(11,540)	(4,770)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	198,695	283,648
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(38,956)	(28,743)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	529,794	494,414
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(50,496)	(33,513)
Foreign Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Market Value	984,854	278,403
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(56,831)	(7,553)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	253,965	365,808
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(37,321)	(26,027)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	1,238,819	644,211
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	$ (94,152)	$ (33,580)

Investments (Summary Of Aggre_2

Investments (Summary Of Aggregate Market Value And Gross Unrealized Depreciation Of Fixed Maturity And Equity Securities, By Contractual Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
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	$ 4,512,115	$ 1,730,364
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(284,780)	(26,793)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	936,350	1,909,627
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(156,067)	(94,376)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	5,448,465	3,639,991
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(440,847)	(121,169)
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	289,680	67,879
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(5,701)	(1,237)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	167,508	416,583
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(26,447)	(23,004)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	457,188	484,462
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(32,148)	(24,241)
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	1,856,090	464,753
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(88,884)	(7,960)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	392,979	689,195
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(57,252)	(38,138)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	2,249,069	1,153,948
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(146,136)	(46,098)
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	1,337,038	495,741
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(95,295)	(12,388)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	59,440	103,612
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(9,244)	(11,100)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	1,396,478	599,353
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(104,539)	(23,488)
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	222,929	98,043
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(19,164)	(1,658)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	41,495	90,328
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(51,392)	(11,678)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	264,424	188,371
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(70,556)	(13,336)
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	661,772	176,222
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(70,133)	(1,027)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	121,979	94,190
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(9,024)	(831)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	783,751	270,412
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	(79,157)	(1,858)
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	144,606	427,726
Fixed maturity securities, Duration of Unrealized Loss, Less than 12 months, Gross Unrealized Depreciation	(5,603)	(2,523)
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Market Value	152,949	515,719
Fixed maturity securities, Duration of Unrealized Loss, Greater than 12 months, Gross Unrealized Depreciation	(2,708)	(9,625)
Fixed maturity securities, Duration of Unrealized Loss, Total, Market Value	297,555	943,445
Fixed maturity securities, Duration of Unrealized Loss, Total, Gross Unrealized Depreciation, Total	$ (8,311)	$ (12,148)

Investments (Summary Of Compone

Investments (Summary Of Components Of Net Investment Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	$ 152,117	$ 145,697
Funds held interest income (expense)	8,216	5,968
Future policy benefit reserve income (expense)	(211)	(234)
Gross investment income	160,122	151,431
Investment expenses	(12,322)	(10,455)
Net investment income	147,800	140,976
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	137,924	126,708
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	3,521	3,507
Short Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	2,175	4,205
Limited Partnerships [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	21,568	8,297
Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	$ (13,071)	$ 2,980

Investments (Summary Of Compo_2

Investments (Summary Of Components Of Net Realized Capital Gains (Losses)) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporary impairments		$ (2,933,000)
Total net realized capital gains (losses)	(210,588,000)	92,232,000
Balance as of December 31, 2019	0
Balance as of March 31, 2020	(21,774,000)
Market Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Allowance for credit losses	(21,774,000)
Balance as of December 31, 2019
Provision for credit losses	(21,774,000)
Balance as of March 31, 2020	(21,774,000)
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Balance as of March 31, 2020	(21,774,000)
Fixed Maturity Securities [Member] | Market Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Allowance for credit losses	(21,774,000)
Other-than-temporary impairments		(2,933,000)
Gains (losses) from sales	(14,076,000)	5,273,000
Provision for credit losses	(21,774,000)
Fixed Maturity Securities [Member] | Fair Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Gains (losses) from sales
Gains (losses) from fair value adjustments	(1,123,000)	13,000
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Balance as of March 31, 2020	(17,305,000)
Corporate Securities [Member] | Market Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Allowance for credit losses	(17,305,000)
Balance as of December 31, 2019
Provision for credit losses	(17,305,000)
Balance as of March 31, 2020	(17,305,000)
Equity Securities [Member] | Fair Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Gains (losses) from sales	(27,599,000)	5,048,000
Gains (losses) from fair value adjustments	(144,003,000)	84,441,000
Other Invested Assets [Member]
Schedule of Available-for-sale Securities [Line Items]
Gains (losses) from sales	(2,327,000)	396,000
Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Gains (losses) from sales	314,000	$ (6,000)
Foreign Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Balance as of March 31, 2020	(519,000)
Foreign Government Securities [Member] | Market Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Allowance for credit losses	(519,000)
Balance as of December 31, 2019
Provision for credit losses	(519,000)
Balance as of March 31, 2020	(519,000)
Foreign Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Balance as of March 31, 2020	(3,950,000)
Foreign Corporate Securities [Member] | Market Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Allowance for credit losses	(3,950,000)
Balance as of December 31, 2019
Provision for credit losses	(3,950,000)
Balance as of March 31, 2020	$ (3,950,000)

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
	Mar. 31, 2020	Mar. 31, 2019
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities	$ 501,953	$ 1,798,226
Gross gains from sales	14,001	16,138
Gross losses from sales	(28,077)	(10,865)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sales of securities	112,841	69,500
Gross gains from sales	2,584	5,675
Gross losses from sales	$ (30,183)	$ (627)

Reserve For Losses, LAE And F_3

Reserve For Losses, LAE And Future Policy Benefit Reserve (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reserve For Losses LAE And Future Policy Benefit Reserve [Line Items]
Incurred related to: Current year	$ 1,433,440	$ 1,050,116
Increase (decrease) in insurance business	(2,600)	$ (1,566)
Covid-19 [Member]
Reserve For Losses LAE And Future Policy Benefit Reserve [Line Items]
Increase (decrease) in insurance business	$ (150,000)

Reserve For Losses, LAE And F_4

Reserve For Losses, LAE And Future Policy Benefit Reserve (Summary Of Activity In The Reserve For Losses And LAE) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reserve For Losses, LAE And Future Policy Benefit Reserve [Abstract]
Gross reserves beginning of period	$ 13,611,313	$ 13,119,090
Less reinsurance recoverables	(1,640,712)	(1,619,641)
Net reserves beginning of period	11,970,601	11,499,449
Incurred related to: Current year	1,433,440	1,050,116
Incurred related to: Prior years	(2,600)	(1,566)
Total incurred losses and LAE	1,430,840	1,048,550
Paid related to: Current year	168,528	103,688
Paid related to: Prior years	907,790	817,006
Total paid losses and LAE	1,076,318	920,694
Foreign exchange/translation adjustment	(156,565)	(1,496)
Net reserves end of period	12,168,558	11,625,810
Plus reinsurance recoverables	1,651,946	1,621,292
Gross reserves end of period	$ 13,820,504	$ 13,247,102

Derivatives (Narrative) (Detail

Derivatives (Narrative) (Details)	3 Months Ended	60 Months Ended
	Mar. 31, 2020USD ($)Item	Dec. 31, 2005Item	Dec. 31, 2019USD ($)	Dec. 31, 2001Item
Derivative [Line Items]
Number of equity indices | Item		2
Number of equity index put option contracts | Item		7		7
Number of equity index put option contracts expired | Item	5
Equity index put option liability	$ 20,958,000		$ 5,584,000
Equity Index Put Option Contracts [Member]
Derivative [Line Items]
Equity index put option liability	0
Equity Index Put Option Contracts [Member] | Fair Value [Member]
Derivative [Line Items]
Equity index put option liability	$ 20,958,000		$ 5,584,000
Standard & Poor's 500 Index [Member]
Derivative [Line Items]
Number of equity index put option contracts | Item	1
Theoretical maximum payout occurs based on index value	$ 0
Discount factor	3.00%
Present value of theoretical maximum payouts	$ 144,636,000
Settlement amount if contracts had expired	$ 0
Equity index if contracts had expired	2,584.59
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 | Item	1
Theoretical maximum payout occurs based on index value	$ 0
Estimates the probability of equity index put option contract will falling below the strike price on the exercise date	70.00%
Discount factor	3.00%
Present value of theoretical maximum payouts	$ 40,003,000
Settlement amount if contracts had expired	$ 2,142,000
Equity index if contracts had expired	5,671.96

Derivatives (Summary Of The Fai

Derivatives (Summary Of The Fair Value Of The Equity Index Put Options) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Option Indexed to Issuer's Equity [Line Items]
Equity index put option liability	$ 20,958		$ 5,584
Net derivative gain (loss)	(15,373)	$ 3,231
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	20,958		$ 5,584
Net derivative gain (loss)	$ (15,373)	$ 3,231

Fair Value (Narrative) (Details

Fair Value (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of public equity portfolio	$ 210,845,000		$ 170,888,000
Other invested assets	655,740,000		612,997,000
Transfers between level 1 and 2	0
Market Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Transfers from level 3		$ (2,458,000)
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Transfers from level 3
Fair Value [Member] | Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other invested assets	212,677,000		209,578,000
Fixed Maturities [Member] | Market Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	951,712,000		772,979,000
Fixed Maturities [Member] | Market Value [Member] | Accounting Standards Update 2015-07 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Transfers from level 3		$ (2,458,000)
Fixed Maturities [Member] | Market Value [Member] | Investment Manager's Valuation Committee Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	722,948,000		610,873,000
Fixed Maturities [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	4,703,000		5,826,000
Fixed Maturities [Member] | Fair Value [Member] | Investment Manager's Valuation Committee Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	4,703,000		5,826,000
Fixed Maturities [Member] | Par Value [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities	$ 228,765,000		$ 162,106,000

Fair Value (Fair Value Measurem

Fair Value (Fair Value Measurement Levels For All Assets And Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	$ 16,545,895	$ 16,824,944
Fixed maturities, fair value	4,703	5,826
Equity securities, fair value	722,851	931,457
Equity index put option contracts	20,958	5,584
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, fair value
Equity securities, fair value	666,266	864,584
Equity index put option contracts
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, fair value
Equity securities, fair value	56,585	66,873
Equity index put option contracts
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, fair value	4,703	5,826
Equity securities, fair value
Equity index put option contracts	20,958	5,584
Fixed Maturity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	16,545,895	16,824,944
Fixed Maturity 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
Fixed Maturity Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	15,594,183	16,051,965
Fixed Maturity Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	951,712	772,979
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	1,432,811	1,515,803
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	1,432,811	1,515,803
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	524,902	536,915
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	524,902	536,915
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	6,347,322	6,374,946
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	5,634,241	5,757,358
Corporate Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	713,081	617,588
Asset-Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	904,153	897,333
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	665,522	743,692
Asset-Backed Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	238,631	153,641
Commercial Mortgage-Backed Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value	840,099	844,557
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	840,099	844,557
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	2,221,171	2,198,581
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	2,221,171	2,198,581
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	3,997	5,703
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	3,997	5,703
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	1,477,718	1,505,950
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	1,477,718	1,505,950
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	2,793,722	2,945,156
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	2,793,722	2,943,406
Foreign Corporate Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed maturities, market value		$ 1,750

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
	Mar. 31, 2020	Mar. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
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
Market Value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance fixed maturities	772,979	435,959
Total gains or (losses) (realized/unrealized) Included in earnings	(210)	4,977
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)	(19,239)	573
Purchases, issuances and settlements	198,182	6,073
Transfers in and/or (out) of Level 3		(2,458)
Ending balance	951,712	445,124
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	(539)
Market Value [Member] | Corporate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance fixed maturities	617,588	428,215
Total gains or (losses) (realized/unrealized) Included in earnings	(214)	4,858
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)	(3,357)	573
Purchases, issuances and settlements	99,064	6,638
Transfers in and/or (out) of Level 3		(2,458)
Ending balance	713,081	437,826
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	(539)
Market Value [Member] | Asset Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance fixed maturities	153,641
Total gains or (losses) (realized/unrealized) Included in earnings	4
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)	(15,882)
Purchases, issuances and settlements	100,868
Transfers in and/or (out) of Level 3
Ending balance	238,631
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
Market Value [Member] | Foreign Corporate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance fixed maturities	1,750	7,744
Total gains or (losses) (realized/unrealized) Included in earnings		119
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)
Purchases, issuances and settlements	(1,750)	(565)
Transfers in and/or (out) of Level 3
Ending balance		7,298
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
Fair Value [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance fixed maturities	5,826	2,337
Total gains or (losses) (realized/unrealized) Included in earnings	(1,123)	13
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)
Purchases, issuances and settlements
Transfers in and/or (out) of Level 3
Ending balance	4,703	2,350
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
Fair Value [Member] | Foreign Corporate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance fixed maturities	5,826	2,337
Total gains or (losses) (realized/unrealized) Included in earnings	(1,123)	13
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss)
Purchases, issuances and settlements
Transfers in and/or (out) of Level 3
Ending balance	4,703	2,350
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

Fair Value (Fair Value Measur_2

Fair Value (Fair Value Measurements Using Significant Unobservable Inputs For Equity Index Put Option Contracts) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Fair Value [Abstract]
Balance, beginning of period	$ 5,584	$ 11,958
Total (gains) or losses (realized/unrealized) Included in earnings	15,373	(3,231)
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	20,958	8,727
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

Earnings Per Common Share (Narr

Earnings Per Common Share (Narrative) (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Antidilutive Securities Excluded from Computation Of Earnings Per Share [Line Items]
Anti-dilutive options	0	0
Minimum [Member]
Antidilutive Securities Excluded from Computation Of Earnings Per Share [Line Items]
Options expiration date	Feb. 24, 2021
Maximum [Member]
Antidilutive Securities Excluded from Computation Of Earnings Per Share [Line Items]
Options expiration date	Sep. 19, 2022

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
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Common Share [Abstract]
Net income (loss)	$ 16,612	$ 354,551
Less: dividends declared-common shares and nonvested common shares	(63,277)	(57,137)
Undistributed earnings	$ (46,666)	$ 297,415
Percentage allocated to common shareholders	98.70%	99.00%
Net income (loss) available to common stockholders, total	$ (46,082)	$ 294,298
Add: dividends declared-common shareholders	62,488	56,531
Numerator for basic and diluted earnings per common share	$ 16,406	$ 350,829
Denominator for basic earnings per weighted-average common shares	40,204	40,304
Effect of dilutive securities: Options	92	141
Denominator for diluted earnings per adjusted weighted-average common shares	40,296	40,445
Basic	$ 0.41	$ 8.70
Diluted	$ 0.41	$ 8.67
Basic weighted-average common shares outstanding	40,204	40,304
Basic weighted-average common shares outstanding and nonvested common shares expected to vest	40,713	40,731

Commitments And Contingencies_2

Commitments And Contingencies (Summary Of Estimated Cost To Replace Annuities For Contingent Liability) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
The Prudential [Member]
Loss Contingencies [Line Items]
Estimated cost to replace annuities	$ 141,281	$ 141,703
Unaffiliated Life Insurance Company [Member]
Loss Contingencies [Line Items]
Estimated cost to replace annuities	$ 33,116	$ 35,082

Other Comprehensive Income (L_3

Other Comprehensive Income (Loss) (Components Of Comprehensive Income (Loss) In The Consolidated Statements Of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total, Before Tax	$ (334,581)	$ 271,705
Total, Tax Effect	36,678	(25,259)
Total, Net of Tax	(297,903)	246,446
URA(D) On Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax	(315,200)	256,630
Tax Effect	35,802	(23,391)
Net of Tax	(279,398)	233,239
Reclassification, Before Tax	38,177	(2,736)
Reclassification, Tax Effect	(6,778)	914
Reclassification, Net of Tax	31,399	(1,822)
Total, Net of Tax	(247,999)	231,417
URA(D) On Securities OTTI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax		(244)
Tax Effect		70
Net of Tax		(174)
Total, Net of Tax		(174)
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax	(58,723)	16,598
Tax Effect	7,899	(2,546)
Net of Tax	(50,824)	14,052
Total, Net of Tax	(50,824)	14,052
Benefit Plan Net Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax
Tax Effect
Net of Tax
Reclassification, Before Tax	1,165	1,457
Reclassification, Tax Effect	(245)	(306)
Reclassification, Net of Tax	920	1,151
Total, Net of Tax	$ 920	$ 1,151

Other Comprehensive Income (L_4

Other Comprehensive Income (Loss) (Reclassification From Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense (benefit)	$ 60,234	$ (59,993)
NET INCOME (LOSS)	16,612	354,551
URA(D) On Securities [Member] | Reclassification From Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other net realized capital gains (losses)	38,177	(2,736)
Income tax expense (benefit)	(6,778)	914
NET INCOME (LOSS)	31,399	(1,822)
Benefit Plan Net Gain (Loss) [Member] | Reclassification From Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other underwriting expenses	1,165	1,457
Income tax expense (benefit)	(245)	(306)
NET INCOME (LOSS)	$ 920	$ 1,151

Other Comprehensive Income (L_5

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
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 9,132,925
Current period change	(297,903)	$ 246,446
Balance	8,580,944	8,389,273
URA(D) On Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	304,425	(179,392)
Current period change	(247,999)	231,417
Balance	56,426	51,851
URA(D) On Securities OTTI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Current period change		(174)
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(201,717)	(215,747)
Current period change	(50,824)	14,052
Balance	(252,541)	(201,695)
Benefit Plan Net Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(74,556)	(67,418)
Current period change	920	1,151
Balance	(73,636)	(66,267)
Accumulated Other Comprehensive Income (Loss), Net of Deferred Income Taxes [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	28,152	(462,557)
Current period change	(297,903)	246,446
Balance	$ (269,751)	$ (216,111)

Credit Facilities (Narrative) (

Credit Facilities (Narrative) (Details)	May 26, 2016USD ($)	Jun. 22, 2012USD ($)	Mar. 31, 2020GBP (£)ItemRate	Dec. 31, 2005	Mar. 31, 2020USD ($)Rate	Mar. 25, 2020USD ($)	Dec. 31, 2019GBP (£)	Dec. 31, 2019USD ($)
Line of Credit Facility [Line Items]
Line of credit facility, number of facilities | Item			2
Line of credit facility, commitment			£ 47,000,000		$ 1,000,000,000
Maximum percentage of admitted assets allowed for borrowing base			10.00%		10.00%
Admitted assets for FHLB					$ 12,879,681,000
Borrowings from FHLB					0
Revolving credit borrowings					50,000,000
Maximum amount available under FHLB					1,287,968,000
Wells Fargo Bank Group Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, commitment	$ 800,000,000	$ 800,000,000			$ 800,000,000			800,000,000
Line of credit facility, term of credit facility	5 years	4 years
Line of credit facility, required minimum debt-to-capital ratio | Rate			35.00%		35.00%
Line of credit facility, required minimum net worth					$ 5,370,979,000
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					6,259,452,000
Revolving credit borrowings					730,977,000			623,484,000
Wells Fargo Bank Group Credit Facility Tranche One [Member]
Line of Credit Facility [Line Items]
Line of credit facility, commitment					200,000,000
Revolving credit borrowings						$ 50,000,000		0
Wells Fargo Bank Group Credit Facility Tranche One [Member] | Debt Instrument Redemption Period Two [Member]
Line of Credit Facility [Line Items]
Revolving credit borrowings					91,816,000			33,737,000
Wells Fargo Bank Group Credit Facility Tranche One [Member] | Federal Funds [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] | London Interbank Offered Rate (LIBOR) [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					600,000,000			600,000,000
Wells Fargo Bank Group Credit Facility Tranche Two [Member] | Debt Instrument Redemption Period Two [Member]
Line of Credit Facility [Line Items]
Revolving credit borrowings					1,649,000			1,649,000
Citibank Bilateral Agreement [Member]
Line of Credit Facility [Line Items]
Line of credit facility, commitment					200,000,000			200,000,000
Percentage of interest on the principal amount of letters of credit issued			0.35%
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
Per annum commitment fee on undrawn credit			0.15%
Revolving credit borrowings					143,676,000			$ 147,970,000
Lloyds Bank plc Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, commitment | £			£ 47,000,000				£ 47,000,000
Line of credit facility, term of credit facility			4 years
Line of credit facility, required minimum net worth					5,532,663,000
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					$ 5,797,191,000
Percentage commitment fee per annum			0.10%
Per annum commitment fee on undrawn credit			0.35%
Revolving credit borrowings | £			£ 47,000,000				£ 47,000,000

Credit Facilities (Summary Of C

Credit Facilities (Summary Of Costs Incurred Connection With Credit Facilities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Credit Facilities [Abstract]
Credit facility interest and fees incurred	$ 123	$ 105

Credit Facilities (Summary Of O

Credit Facilities (Summary Of Outstanding Letters Of Credit And/Or Borrowings) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2020GBP (£)	Dec. 31, 2019GBP (£)	Mar. 31, 2020USD ($)	Mar. 25, 2020USD ($)	Dec. 31, 2019USD ($)	May 26, 2016USD ($)	Jun. 22, 2012USD ($)
Line of Credit Facility [Line Items]
Commitment	£ 47,000,000		$ 1,000,000,000
In Use			50,000,000
Wells Fargo Bank Group Credit Facility Tranche One [Member]
Line of Credit Facility [Line Items]
Commitment			200,000,000
In Use				$ 50,000,000	0
Wells Fargo Bank Group Credit Facility Tranche One [Member] | Debt Instrument Redemption Period One [Member]
Line of Credit Facility [Line Items]
Commitment			200,000,000		200,000,000
In Use			50,000,000
Date of Expiry	May 26, 2020
Wells Fargo Bank Group Credit Facility Tranche One [Member] | Debt Instrument Redemption Period Two [Member]
Line of Credit Facility [Line Items]
In Use			91,816,000		33,737,000
Date of Expiry	Dec. 31, 2020	Dec. 31, 2020
Wells Fargo Bank Group Credit Facility Tranche Two [Member]
Line of Credit Facility [Line Items]
Commitment			600,000,000		600,000,000
Wells Fargo Bank Group Credit Facility Tranche Two [Member] | Debt Instrument Redemption Period One [Member]
Line of Credit Facility [Line Items]
In Use			5,161,000		2,381,000
Date of Expiry	Jul. 29, 2020	Jul. 29, 2020
Wells Fargo Bank Group Credit Facility Tranche Two [Member] | Debt Instrument Redemption Period Two [Member]
Line of Credit Facility [Line Items]
In Use			1,649,000		1,649,000
Date of Expiry	Sep. 30, 2020	Sep. 30, 2020
Wells Fargo Bank Group Credit Facility Tranche Two [Member] | Debt Instrument Redemption Period Three [Member]
Line of Credit Facility [Line Items]
In Use			569,136,000		573,353,000
Date of Expiry	Dec. 31, 2020	Dec. 31, 2020
Wells Fargo Bank Group Credit Facility Tranche Two [Member] | Debt Instrument Redemption Period Four [Member]
Line of Credit Facility [Line Items]
In Use			13,215,000		12,364,000
Date of Expiry	Jan. 4, 2021	Jan. 4, 2021
Wells Fargo Bank Group Credit Facility [Member]
Line of Credit Facility [Line Items]
Commitment			800,000,000		800,000,000	$ 800,000,000	$ 800,000,000
In Use			730,977,000		623,484,000
Citibank Bilateral Letter Of Credit Agreement One [Member]
Line of Credit Facility [Line Items]
Commitment			200,000,000		200,000,000
In Use			3,672,000		4,425,000
Date of Expiry	Nov. 24, 2020	Feb. 29, 2020
Citibank Bilateral Letter Of Credit Agreement Two [Member]
Line of Credit Facility [Line Items]
In Use			93,578,000		512,000
Date of Expiry	Dec. 31, 2020	Sep. 3, 2020
Citibank Bilateral Letter Of Credit Agreement Three [Member]
Line of Credit Facility [Line Items]
In Use			4,425,000		3,672,000
Date of Expiry	Feb. 28, 2021	Nov. 24, 2020
Citibank Bilateral Letter Of Credit Agreement Four [Member]
Line of Credit Facility [Line Items]
In Use			493,000		177,000
Date of Expiry	Aug. 15, 2021	Dec. 16, 2020
Citibank Bilateral Letter Of Credit Agreement Five [Member]
Line of Credit Facility [Line Items]
In Use			156,000		125,000
Date of Expiry	Dec. 16, 2021	Dec. 20, 2020
Citibank Bilateral Letter Of Credit Agreement Six [Member]
Line of Credit Facility [Line Items]
In Use			110,000		101,404,000
Date of Expiry	Dec. 20, 2021	Dec. 31, 2020
Citibank Bilateral Letter Of Credit Agreement Seven [Member]
Line of Credit Facility [Line Items]
In Use			4,663,000		559,000
Date of Expiry	Dec. 31, 2021	Aug. 15, 2021
Citibank Bilateral Letter Of Credit Agreement Eight [Member]
Line of Credit Facility [Line Items]
In Use			166,000		37,096,000
Date of Expiry	Jan. 21, 2024	Dec. 30, 2023
Citibank Bilateral Letter Of Credit Agreement Nine [Member]
Line of Credit Facility [Line Items]
In Use			36,413,000
Date of Expiry	Mar. 30, 2024
Citibank Bilateral Agreement [Member]
Line of Credit Facility [Line Items]
Commitment			200,000,000		200,000,000
In Use			$ 143,676,000		$ 147,970,000
Lloyds Bank PLC [Member]
Line of Credit Facility [Line Items]
Commitment | £	£ 47,000,000	£ 47,000,000
In Use | £	£ 47,000,000	£ 47,000,000
Date of Expiry	Dec. 31, 2023	Dec. 31, 2023
Lloyd's Bank Issuance One [Member]
Line of Credit Facility [Line Items]
Commitment | £
In Use | £
Lloyds Bank plc Credit Facility [Member]
Line of Credit Facility [Line Items]
Commitment | £	47,000,000	47,000,000
In Use | £	£ 47,000,000	£ 47,000,000

Collateralized Reinsurance An_3

Collateralized Reinsurance And Trust Agreements (Narrative) (Details) $ in Thousands	Dec. 12, 2019USD ($)Item	Apr. 30, 2018USD ($)Item	Apr. 01, 2018USD ($)	Apr. 13, 2017USD ($)Item	Dec. 01, 2015USD ($)Item	Nov. 18, 2014USD ($)	Apr. 24, 2014USD ($)Item	Nov. 30, 2019USD ($)	Mar. 31, 2020USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2019USD ($)
Effects of Reinsurance [Line Items]
Amount on deposit in trust accounts									$ 1,056,172
Preferred shares
Reinsurance coverage amount									$ 110,188	$ 80,028
Catastrophe Reinsurance Agreement 3 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount				$ 325,000
Catastrophe Reinsurance Agreement 4 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount				50,000
Catastrophe Reinsurance Agreement 5 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount				75,000
Catastrophe Reinsurance Agreement 6 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount				$ 175,000
Catastrophe Reinsurance Series 2015-1 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount					$ 625,000
Kilimanjaro Re Limited [Member]
Effects of Reinsurance [Line Items]
Number of collateralized reinsurance agreements | Item				6	2		2
Reinsurance agreements expiration date							Apr. 1, 2018
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance [Member]
Effects of Reinsurance [Line Items]
Number of collateralized reinsurance agreements | Item	4	4
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 contract term				4 years
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 1 And 2 [Member]
Effects of Reinsurance [Line Items]
Number of collateralized reinsurance agreements | Item	2	2
Reinsurance contract term	4 years	4 years
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 3 And 4 [Member]
Effects of Reinsurance [Line Items]
Number of collateralized reinsurance agreements | Item	2	2
Reinsurance contract term	5 years	5 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 contract term				5 years
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 1 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	$ 150,000	$ 62,500		$ 225,000	$ 300,000		$ 250,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 2 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	275,000	200,000		400,000	$ 325,000		200,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 3 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	150,000	62,500
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Agreement 4 [Member]
Effects of Reinsurance [Line Items]
Reinsurance coverage amount	275,000	200,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2014-1 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount							$ 450,000
Catastrophe Reinsurance Bonds Redeemed Amount		450,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2014-2 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount						$ 500,000
Catastrophe Reinsurance Bonds Redeemed Amount								$ 450,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2017-1 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount				950,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2017-2 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount				$ 300,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2018-1 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount		262,500
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2018-2 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount		$ 262,500
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2019-1 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount	425,000
Kilimanjaro Re Limited [Member] | Catastrophe Reinsurance Series 2019-2 Notes [Member]
Effects of Reinsurance [Line Items]
Catastrophe reinsurance bonds funded amount	$ 425,000
Mt. Logan Re [Member]
Effects of Reinsurance [Line Items]
Percentage of voting common shares owned by Group									100.00%
Assumed net risk exposures									$ 942,548		993,036
Preferred shares									$ 50,270		$ 46,390
Retrocede amount			$ 269,198
Cash transferred			$ 252,000
Mt. Logan Re [Member] | Minimum [Member]
Effects of Reinsurance [Line Items]
Accident year									2002
Mt. Logan Re [Member] | Maximum [Member]
Effects of Reinsurance [Line Items]
Accident year									2015
Liability retroceded									$ 319,000

Collateralized Reinsurance An_4

Collateralized Reinsurance And Trust Agreements (Premiums And Losses Ceded By The Company To Affiliate) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Effects of Reinsurance [Line Items]
Ceded written premiums	$ 110,188	$ 80,028
Ceded earned premiums	90,550	56,732
Ceded losses and LAE	45,115	45,613
Assumed written premiums	2,759	2,309
Assumed earned premiums	2,759	2,309
Assumed losses and LAE

Senior Notes (Narrative) (Detai

Senior Notes (Narrative) (Details) - Senior Notes [Member] - 4.868% Senior notes due 6/1/2044 [Member]	3 Months Ended
	Mar. 31, 2020USD ($)
Debt Instrument [Line Items]
Date issued	Jun. 5, 2014
Debt instrument face amount	$ 400,000,000
Debt instrument, term	30 years
Debt instrument, stated interest rate	4.868%
Debt instrument, maturity date	Jun. 1, 2044

Senior Notes (Schedule Of Outst

Senior Notes (Schedule Of Outstanding Senior Notes) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Consolidated Balance Sheet Amount	$ 397,104,000	$ 397,074,000
Senior Notes [Member] | 4.868% Senior notes due 6/1/2044 [Member]
Debt Instrument [Line Items]
Date issued	Jun. 5, 2014
Date due	Jun. 1, 2044
Principal Amounts	$ 400,000,000
Consolidated Balance Sheet Amount	397,104,000	397,074,000
Market Value	$ 454,224,000	$ 452,848,000

Senior Notes (Schedule Of Inter

Senior Notes (Schedule Of Interest Expense Incurred In Connection With Senior Notes) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Senior Notes [Abstract]
Interest expense incurred	$ 4,868	$ 4,868

Long Term Subordinated Notes (N

Long Term Subordinated Notes (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)
Debt Instrument [Line Items]
Redemption date	May 1, 2047
Maximum [Member]
Debt Instrument [Line Items]
Right to defer interest on one or more occasions for up to number of consecutive years	10 years
Subordinated Debt [Member]
Debt Instrument [Line Items]
Percentage of principal amount required for redemption	100.00%
Outstanding debt reduction	$ 161,441
Subordinated Debt [Member] | 6.6 % Long Term Subordinated Notes [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	6.60%
Debt instrument, maturity date	May 1, 2067
Interest payment commencement date	Nov. 15, 2007
Reset quarterly interest rate	4.08%
Basis spread on variable rate	2.385%
Outstanding debt reduction	$ 1,700
Gain on repurchase and retirement of debt	$ 502
Subordinated Debt [Member] | 6.6 % Long Term Subordinated Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest payment date	May 3, 2007
Subordinated Debt [Member] | 6.6 % Long Term Subordinated Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest payment date	May 14, 2017
Senior Notes [Member] | 6.6 % 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	1 year
Senior Notes [Member] | 5.4% Senior notes due 10/15/2014 [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	5.40%
Debt instrument, maturity date	Oct. 15, 2014
Senior Notes [Member] | 4.868% Senior notes due 6/1/2044 [Member]
Debt Instrument [Line Items]
Debt instrument, stated interest rate	4.868%
Debt instrument, 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 ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Consolidated balance sheet amount	$ 235,083	$ 236,758
Subordinated Debt [Member] | 6.6 % Long Term Subordinated Notes [Member]
Debt Instrument [Line Items]
Date Issued	Apr. 26, 2007
Principal Amounts	$ 400,000
Maturity Date	May 1, 2067
Consolidated balance sheet amount	$ 235,083	236,758
Market Value	$ 181,834	$ 233,191
Scheduled [Member] | Subordinated Debt [Member] | 6.6 % Long Term Subordinated Notes [Member]
Debt Instrument [Line Items]
Maturity Date	May 15, 2037
Final [Member] | Subordinated Debt [Member] | 6.6 % Long Term Subordinated Notes [Member]
Debt Instrument [Line Items]
Maturity Date	May 1, 2067

Long Term Subordinated Notes _2

Long Term Subordinated Notes (Schedule Of Interest Expense Incurred In Connection With Long Term Subordinated Notes) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Long Term Subordinated Notes [Abstract]
Interest expense incurred	$ 2,538	$ 2,605

Leases (Narrative) (Details)

Leases (Narrative) (Details) $ in Thousands	Jul. 02, 2019USD ($)ft²
Lease [Line Items]
Area of property | ft²	315,000
Annual lease expense	$ 7,800
Monthly lease expense	$ 650

Leases (Supplemental Informatio

Leases (Supplemental Information Relating to Operating Leases) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Leases [Abstract]
Lease expense incurred: Operating lease cost	$ 7,890	$ 5,187
Operating lease right of use assets	156,626	69,869	$ 161,435
Operating lease liabilities	167,072	77,270	$ 169,909
Operating cash flows from operating leases	$ (4,919)	$ (4,431)
Weighted average remaining operating lease term	12 years 4 months 24 days		12 years 7 months 6 days
Weighted average discount rate on operating leases	3.87%		3.91%

Leases (Maturities of Lease Lia

Leases (Maturities of Lease Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Leases [Abstract]
Remainder of 2020	$ 15,187
2021	17,836
2022	19,888
2023	19,099
2024	18,831
2025	15,822
Thereafter	113,475
Undiscounted lease payments	220,138
Less: present value adjustment	53,066
Total operating lease liability	$ 167,072	$ 169,909	$ 77,270

Segment Reporting (Schedule Of

Segment Reporting (Schedule Of Underwriting Results For Operating Segments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Premiums earned	$ 2,036,814	$ 1,732,697
Incurred losses and LAE	1,430,840	1,048,550
Commission and brokerage	448,522	389,474
Other underwriting expenses	128,860	98,985
Underwriting gain (loss)	28,592	195,688
U.S. Reinsurance [Member]
Segment Reporting Information [Line Items]
Gross written premium	1,777,771	1,532,051
Net written premiums	1,613,094	1,394,553
Premiums earned	1,485,221	1,307,519
Incurred losses and LAE	1,020,642	772,198
Commission and brokerage	370,356	322,637
Other underwriting expenses	44,139	35,769
Underwriting gain (loss)	50,084	176,915
Insurance [Member]
Segment Reporting Information [Line Items]
Gross written premium	793,100	595,057
Net written premiums	588,385	457,145
Premiums earned	551,593	425,178
Incurred losses and LAE	410,198	276,352
Commission and brokerage	78,166	66,837
Other underwriting expenses	84,721	63,216
Underwriting gain (loss)	$ (21,492)	$ 18,773

Segment Reporting (Schedule O_2

Segment Reporting (Schedule Of Underwriting Results For Operating Segments To Income (Loss) Before Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Underwriting gain (loss)	$ 28,592	$ 195,688
Net investment income	147,800	140,976
Net realized capital gains (losses)	(210,588)	92,232
Net derivative gain (loss)	(15,373)	3,231
Corporate expenses	(9,833)	(6,652)
Interest, fee and bond issue cost amortization expense	(7,583)	(7,631)
Other income (expense)	23,363	(3,300)
INCOME (LOSS) BEFORE TAXES	$ (43,622)	$ 414,544

Segment Reporting (Schedule O_3

Segment Reporting (Schedule Of Gross Written Premiums Derived From Largest Non-U.S. Market) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
United Kingdom [Member]
Segment Reporting Information [Line Items]
Gross written premium	$ 306,708	$ 263,857

Share-Based Compensation Plans

Share-Based Compensation Plans (Narrative) (Details)	3 Months Ended
	Mar. 31, 2020$ / sharesshares
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation awards, number of shares granted | shares	167,829
Share-based compensation awards, grant date	Feb. 26, 2020
Share-based compensation awards, per option fair value | $ / shares	$ 277.145
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation awards, number of shares granted | shares	16,120
Share-based compensation awards, grant date	Feb. 26, 2020
Share-based compensation awards, per option fair value | $ / shares	$ 277.145

Retirement Benefits (Narrative)

Retirement Benefits (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Company contributions	$ 0	$ 0

Retirement Benefits (Net Period

Retirement Benefits (Net Periodic Benefit Cost For U.S. Employees) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4,011	$ 2,276
Interest cost	2,483	2,930
Expected return on plan assets	(5,197)	(5,016)
Amortization of net (income) loss	1,213	1,601
FAS 88 settlement charge		104
Net periodic benefit cost	2,510	1,895
Post-Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	141	286
Interest cost	215	295
Amortization of prior service cost	(48)	(144)
Net periodic benefit cost	$ 308	$ 437