10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)
x	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
	OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended September 30, 2018
	OR
¨	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
	OF THE SECURITIES EXCHANGE ACT OF 1934
	Commission File Number 1-11848

REINSURANCE GROUP OF AMERICA, INCORPORATED

(Exact name of Registrant as specified in its charter)

MISSOURI	43-1627032
(State or other jurisdiction	(IRS employer
of incorporation or organization)	identification number)

16600 Swingley Ridge Road

Chesterfield, Missouri 63017

(Address of principal executive offices)

(636) 736-7000

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes x  No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Yes x  No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer x     Accelerated filer o     Non-accelerated filer o

Smaller reporting company o     Emerging growth company o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes o  No x

As of October 31, 2018, 62,774,675 shares of the registrant’s common stock were outstanding.

REINSURANCE GROUP OF AMERICA, INCORPORATED AND SUBSIDIARIES

TABLE OF CONTENTS

Item		Page
	PART I – FINANCIAL INFORMATION
1	Financial Statements
	Condensed Consolidated Balance Sheets (Unaudited) September 30, 2018 and December 31, 2017	3
	Condensed Consolidated Statements of Income (Unaudited) Three and nine months ended September 30, 2018 and 2017	4
	Condensed Consolidated Statements of Comprehensive Income (Unaudited) Three and nine months ended September 30, 2018 and 2017	5
	Condensed Consolidated Statements of Cash Flows (Unaudited) Nine months ended September 30, 2018 and 2017	6
	Notes to Condensed Consolidated Financial Statements (Unaudited):	7
	1. Business and Basis of Presentation	7
	2. Earnings Per Share	7
	3. Equity	8
	4. Investments	10
	5. Derivative Instruments	20
	6. Fair Value of Assets and Liabilities	28
	7. Segment Information	39
	8. Commitments, Contingencies and Guarantees	40
	9. Income Tax	41
	10. Employee Benefit Plans	43
	11. Reinsurance	43
	12. Financing Activities	44
	13. New Accounting Standards	44
2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	46
3	Quantitative and Qualitative Disclosures About Market Risk	80
4	Controls and Procedures	81
	PART II – OTHER INFORMATION
1	Legal Proceedings	82
1A	Risk Factors	82
2	Unregistered Sales of Equity Securities and Use of Proceeds	82
6	Exhibits	82
	Signatures	84
	Index to Exhibits	83

2

PART I - FINANCIAL INFORMATION

ITEM 1. Financial Statements

REINSURANCE GROUP OF AMERICA, INCORPORATED AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

	September 30, 2018			December 31, 2017
	(Dollars in thousands, except share data)
Assets
Fixed maturity securities available-for-sale, at fair value (amortized cost $37,751,132 and $35,281,412)	$	39,005,212		$	38,150,820
Equity securities, at fair value (cost $111,248 and $102,841)	101,069			100,152
Mortgage loans on real estate (net of allowances of $10,366 and $9,384)	4,779,074			4,400,533
Policy loans	1,320,050			1,357,624
Funds withheld at interest	5,976,301			6,083,388
Short-term investments	229,928			93,304
Other invested assets	1,706,979			1,505,332
Total investments	53,118,613			51,691,153
Cash and cash equivalents	1,730,489			1,303,524
Accrued investment income	455,296			392,721
Premiums receivable and other reinsurance balances	2,779,556			2,338,481
Reinsurance ceded receivables	769,324			782,027
Deferred policy acquisition costs	3,211,145			3,239,824
Other assets	908,219			767,088
Total assets	$	62,972,642		$	60,514,818
Liabilities and Stockholders’ Equity
Future policy benefits	$	25,139,148		$	22,363,241
Interest-sensitive contract liabilities	16,751,379			16,227,642
Other policy claims and benefits	5,424,347			4,992,074
Other reinsurance balances	482,235			488,739
Deferred income taxes	1,883,848			2,198,309
Other liabilities	1,213,595			1,102,975
Long-term debt	2,787,975			2,788,365
Collateral finance and securitization notes	710,792			783,938
Total liabilities	54,393,319			50,945,283
Commitments and contingent liabilities (See Note 8)
Stockholders’ Equity:
Preferred stock - par value $.01 per share, 10,000,000 shares authorized, no shares issued or outstanding	—			—
Common stock - par value $.01 per share, 140,000,000 shares authorized, 79,137,758 shares issued at September 30, 2018 and December 31, 2017	791			791
Additional paid-in capital	1,899,144			1,870,906
Retained earnings	7,215,526			6,736,265
Treasury stock, at cost - 16,186,890 and 14,685,663 shares	(1,348,943		)	(1,102,058		)
Accumulated other comprehensive income	812,805			2,063,631
Total stockholders’ equity	8,579,323			9,569,535
Total liabilities and stockholders’ equity	$	62,972,642		$	60,514,818

See accompanying notes to condensed consolidated financial statements (unaudited).

3

REINSURANCE GROUP OF AMERICA, INCORPORATED AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Revenues:	(Dollars in thousands, except per share data)
Net premiums	$	2,562,042		$	2,489,797		$	7,739,053		$	7,335,944
Investment income, net of related expenses	572,742			556,918			1,617,132			1,589,820
Investment related gains (losses), net:
Other-than-temporary impairments on fixed maturity securities	(10,705		)	(390		)	(14,055		)	(20,980		)
Other investment related gains (losses), net	(9,312		)	23,043			(17,004		)	160,451
Total investment related gains (losses), net	(20,017		)	22,653			(31,059		)	139,471
Other revenues	112,764			75,942			272,020			218,091
Total revenues	3,227,531			3,145,310			9,597,146			9,283,326
Benefits and Expenses:
Claims and other policy benefits	2,209,920			2,100,680			6,851,614			6,371,188
Interest credited	143,292			126,099			333,068			349,068
Policy acquisition costs and other insurance expenses	310,639			365,424			987,817			1,064,645
Other operating expenses	200,262			168,417			586,495			481,279
Interest expense	33,290			36,836			107,769			108,590
Collateral finance and securitization expense	7,467			7,692			22,509			21,235
Total benefits and expenses	2,904,870			2,805,148			8,889,272			8,396,005
Income before income taxes	322,661			340,162			707,874			887,321
Provision for income taxes	21,462			112,571			102,071			282,028
Net income	$	301,199		$	227,591		$	605,803		$	605,293
Earnings per share:
Basic earnings per share	$	4.76		$	3.53		$	9.47		$	9.39
Diluted earnings per share	$	4.68		$	3.47		$	9.30		$	9.23
Dividends declared per share	$	0.60		$	0.50		$	1.60		$	1.32

See accompanying notes to condensed consolidated financial statements (unaudited).

4

REINSURANCE GROUP OF AMERICA, INCORPORATED AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Comprehensive income (loss)	(Dollars in thousands)
Net income	$	301,199		$	227,591		$	605,803		$	605,293
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	25,462			46,733			(30,375		)	68,085
Net unrealized investment gains (losses)	(215,986		)	(93,574		)	(1,218,309		)	415,870
Defined benefit pension and postretirement plan adjustments	931			700			431			2,473
Total other comprehensive income (loss), net of tax	(189,593		)	(46,141		)	(1,248,253		)	486,428
Total comprehensive income (loss)	$	111,606		$	181,450		$	(642,450	)	$	1,091,721

See accompanying notes to condensed consolidated financial statements (unaudited).

5

REINSURANCE GROUP OF AMERICA, INCORPORATED AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Nine months ended September 30,
	2018			2017
	(Dollars in thousands)
Cash Flows from Operating Activities:
Net income	$	605,803		$	605,293
Adjustments to reconcile net income to net cash provided by operating activities:
Change in operating assets and liabilities:
Accrued investment income	23,473			(63,321		)
Premiums receivable and other reinsurance balances	(519,107		)	(421,027		)
Deferred policy acquisition costs	23,682			67,471
Reinsurance ceded receivable balances	37,468			(120,013		)
Future policy benefits, other policy claims and benefits, and other reinsurance balances	920,492			982,164
Deferred income taxes	(8,136		)	236,185
Other assets and other liabilities, net	(47,978		)	78,848
Amortization of net investment premiums, discounts and other	(55,154		)	(95,227		)
Depreciation and amortization expense	32,153			21,384
Investment related (gains) losses, net	31,059			(139,471		)
Other, net	56,408			(47,787		)
Net cash provided by operating activities	1,100,163			1,104,499
Cash Flows from Investing Activities:
Sales of fixed maturity securities available-for-sale	6,314,968			6,364,236
Maturities of fixed maturity securities available-for-sale	461,764			385,993
Sales of equity securities	44,952			192,821
Principal payments and sales of mortgage loans on real estate	290,450			208,052
Principal payments on policy loans	43,995			93,286
Purchases of fixed maturity securities available-for-sale	(6,041,665		)	(7,450,749		)
Purchases of equity securities	(12,578		)	(60,790		)
Cash invested in mortgage loans on real estate	(671,956		)	(751,702		)
Cash invested in policy loans	(6,422		)	(5,830		)
Cash invested in funds withheld at interest	(61,969		)	(12,597		)
Purchase of businesses, net of cash acquired of $4,988	(31,441		)	—
Purchases of property and equipment	(20,478		)	(33,242		)
Change in short-term investments	34,856			65,664
Change in other invested assets	(313,464		)	(51,476		)
Net cash provided by (used in) investing activities	31,012			(1,056,334		)
Cash Flows from Financing Activities:
Dividends to stockholders	(102,441		)	(85,086		)
Repayment of collateral finance and securitization notes	(75,146		)	(56,637		)
Principal payments of long-term debt	(2,007		)	(301,927		)
Purchases of treasury stock	(273,873		)	(41,360		)
Exercise of stock options, net	2,336			4,450
Change in cash collateral for derivative positions and other arrangements	(21,288		)	(46,206		)
Deposits on universal life and other investment type policies and contracts	320,871			1,007,563
Withdrawals on universal life and other investment type policies and contracts	(520,649		)	(568,789		)
Net cash used in financing activities	(672,197		)	(87,992		)
Effect of exchange rate changes on cash	(32,013		)	43,699
Change in cash and cash equivalents	426,965			3,872
Cash and cash equivalents, beginning of period	1,303,524			1,200,718
Cash and cash equivalents, end of period	$	1,730,489		$	1,204,590
Supplemental disclosures of cash flow information:
Interest paid	$	124,575		$	129,136
Income taxes paid, net of refunds	$	99,554		$	27,385
Non-cash transactions:
Transfer of invested assets	$	3,763,195		$	2,247,136
Purchase of businesses:
Assets acquired, excluding cash acquired	$	69,853		$	—
Liabilities assumed	(38,412		)	—
Net cash paid on purchase	$	31,441		$	—

See accompanying notes to condensed consolidated financial statements (unaudited).

6

REINSURANCE GROUP OF AMERICA, INCORPORATED AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements

(Unaudited)

1. Business and Basis of Presentation

Reinsurance Group of America, Incorporated (“RGA”) is an insurance holding company that was formed on December 31, 1992. The accompanying unaudited condensed consolidated financial statements of RGA and its subsidiaries (collectively, the “Company”) have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these condensed consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments, including normal recurring adjustments necessary for a fair presentation have been included. Results for the nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. These unaudited condensed consolidated financial statements include the accounts of RGA and its subsidiaries, and all intercompany accounts and transactions have been eliminated. These condensed consolidated statements should be read in conjunction with the Company’s 2017 Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on February 27, 2018 (the “2017 Annual Report”).

2. Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share on net income (in thousands, except per share information):

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Earnings:
Net income (numerator for basic and diluted calculations)	$	301,199	$	227,591	$	605,803	$	605,293
Shares:
Weighted average outstanding shares (denominator for basic calculation)	63,279		64,488		63,941		64,430
Equivalent shares from outstanding stock options	1,017		1,165		1,189		1,174
Denominator for diluted calculation	64,296		65,653		65,130		65,604
Earnings per share:
Basic	$	4.76	$	3.53	$	9.47	$	9.39
Diluted	$	4.68	$	3.47	$	9.30	$	9.23

The calculation of common equivalent shares does not include the impact of options having a strike or conversion price that exceeds the average stock price for the earnings period, as the result would be antidilutive. The calculation of common equivalent shares also excludes the impact of outstanding performance contingent shares, as the conditions necessary for their issuance have not been satisfied as of the end of the reporting period. The following table presents approximate amounts of stock options and performance contingent shares excluded from the calculation of common equivalent shares (in thousands):

	Three months ended September 30,		Nine months ended September 30,
	2018	2017	2018	2017
Excluded from common equivalent shares:
Stock options	227	87	349	296
Performance contingent shares	276	307	256	293

7

3. Equity

Common Stock

The changes in number of common stock shares, issued, held in treasury and outstanding are as follows for the periods indicated:

	Issued	Held In Treasury		Outstanding
Balance, December 31, 2017	79,137,758	14,685,663		64,452,095
Common stock acquired	—	1,750,295		(1,750,295	)
Stock-based compensation (1)	—	(249,068	)	249,068
Balance, September 30, 2018	79,137,758	16,186,890		62,950,868

	Issued	Held In Treasury		Outstanding
Balance, December 31, 2016	79,137,758	14,835,256		64,302,502
Common stock acquired	—	208,680		(208,680	)
Stock-based compensation (1)	—	(274,449	)	274,449
Balance, September 30, 2017	79,137,758	14,769,487		64,368,271

(1) Represents net shares issued from treasury pursuant to the Company’s equity-based compensation programs.

Common Stock Held in Treasury

Common stock held in treasury is accounted for at average cost. Gains resulting from the reissuance of common stock held in treasury are credited to additional paid-in capital. Losses resulting from the reissuance of common stock held in treasury are charged first to additional paid-in capital to the extent the Company has previously recorded gains on treasury share transactions, then to retained earnings.

In January 2017, RGA’s board of directors authorized a share repurchase program for up to $400.0 million of RGA’s outstanding common stock. The authorization was effective immediately and does not have an expiration date. During the first nine months of 2018, RGA repurchased 1.8 million shares of common stock under this program for $258.5 million. During the first nine months of 2017, RGA repurchased 0.2 million shares of common stock under this program for $26.9 million.

Accumulated Other Comprehensive Income (Loss)

The balance of and changes in each component of accumulated other comprehensive income (loss) (“AOCI”) for the nine months ended September 30, 2018 and 2017 are as follows (dollars in thousands):

	Accumulated Currency Translation Adjustments			Unrealized Appreciation (Depreciation) of Investments(1)			Pension and Postretirement Benefits			Total
Balance, December 31, 2017	$	(86,350	)	$	2,200,661		$	(50,680	)	$	2,063,631
Other comprehensive income (loss) before reclassifications	(24,977		)	(1,638,146		)	(3,391		)	(1,666,514		)
Amounts reclassified to (from) AOCI	—			79,505			3,986			83,491
Deferred income tax benefit (expense)	(5,398		)	340,332			(164		)	334,770
Adoption of new accounting standard	(2,573		)	—			—			(2,573		)
Balance, September 30, 2018	$	(119,298	)	$	982,352		$	(50,249	)	$	812,805

	Accumulated Currency Translation Adjustments			Unrealized Appreciation (Depreciation) of Investments(1)			Pension and Postretirement Benefits			Total
Balance, December 31, 2016	$	(172,541	)	$	1,355,033		$	(43,163	)	$	1,139,329
Other comprehensive income (loss) before reclassifications	23,117			671,564			(191		)	694,490
Amounts reclassified to (from) AOCI	—			(51,407		)	4,006			(47,401		)
Deferred income tax benefit (expense)	44,968			(204,287		)	(1,342		)	(160,661		)
Balance, September 30, 2017	$	(104,456	)	$	1,770,903		$	(40,690	)	$	1,625,757

(1) Includes cash flow hedges of $29,043 and $2,619 as of September 30, 2018 and December 31, 2017, respectively, and $347 and $(2,496) as of September 30, 2017 and December 31, 2016, respectively. See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.

8

The following table presents the amounts of AOCI reclassifications for the three and nine months ended September 30, 2018 and 2017 (dollars in thousands):

	Amount Reclassified from AOCI
	Three months ended September 30,						Nine months ended September 30,
Details about AOCI Components	2018			2017			2018			2017			Affected Line Item in  Statements of Income
Net unrealized investment gains (losses):
Net unrealized gains (losses) on available-for-sale securities	$	(21,249	)	$	10,515		$	(60,347	)	$	39,032		Investment related gains (losses), net
Cash flow hedges - Interest rate	234			—			(108		)	—			(1)
Cash flow hedges - Currency/Interest rate	50			230			270			560			(1)
Cash flow hedges - Forward bond purchase commitments	—			224			—			286			(1)
Deferred policy acquisition costs attributed to unrealized gains and losses	(4,893		)	1,116			(19,320		)	11,529			(2)
Total	(25,858		)	12,085			(79,505		)	51,407
Provision for income taxes	5,355			(3,991		)	16,978			(16,015		)
Net unrealized gains (losses), net of tax	$	(20,503	)	$	8,094		$	(62,527	)	$	35,392
Amortization of defined benefit plan items:
Prior service cost (credit)	$	246		$	590		$	739		$	732		(3)
Actuarial gains/(losses)	(1,866		)	(1,661		)	(4,725		)	(4,738		)	(3)
Total	(1,620		)	(1,071		)	(3,986		)	(4,006		)
Provision for income taxes	340			375			837			1,402
Amortization of defined benefit plans, net of tax	$	(1,280	)	$	(696	)	$	(3,149	)	$	(2,604	)
Total reclassifications for the period	$	(21,783	)	$	7,398		$	(65,676	)	$	32,788

(1) See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.

(2) This AOCI component is included in the computation of the deferred policy acquisition cost. See Note 8 – “Deferred Policy Acquisition Costs” of the 2017 Annual Report for additional details.

(3) This AOCI component is included in the computation of the net periodic pension cost. See Note 10 – “Employee Benefit Plans” for additional details.

Equity Based Compensation

Equity compensation expense was $28.4 million and $17.1 million in the first nine months of 2018 and 2017, respectively. In the first quarter of 2018, the Company granted 0.2 million stock appreciation rights at $150.87 weighted average exercise price per share and 0.1 million performance contingent units to employees. Additionally, non-employee directors were granted a total of 7,623 shares of common stock. As of September 30, 2018, 1.5 million share options at a weighted average strike price per share of $66.48 were vested and exercisable, with a remaining weighted average exercise period of 4.3 years. As of September 30, 2018, the total compensation cost of non-vested awards not yet recognized in the condensed consolidated financial statements was $35.1 million. It is estimated that these costs will vest over a weighted average period of 1.3 years.

9

4. Investments

Fixed Maturity and Equity Securities Available-for-Sale

The Company holds various types of fixed maturity securities available-for-sale and classifies them as corporate securities (“Corporate”), Canadian and Canadian provincial government securities (“Canadian government”), residential mortgage-backed securities (“RMBS”), asset-backed securities (“ABS”), commercial mortgage-backed securities (“CMBS”), U.S. government and agencies (“U.S. government”), state and political subdivisions, and other foreign government, supranational and foreign government-sponsored enterprises (“Other foreign government”).

The following table provides information relating to investments in fixed maturity securities by sector as of September 30, 2018 (dollars in thousands):

September 30, 2018:	Amortized Cost		Unrealized Gains		Unrealized Losses		Estimated Fair Value		% of Total		Other-than- temporary impairments in AOCI
Available-for-sale:
Corporate	$	24,271,467	$	594,444	$	416,413	$	24,449,498	62.7	%	$	—
Canadian government	2,902,433		1,138,426		4,109		4,036,750		10.3		—
RMBS	1,816,949		14,235		50,422		1,780,762		4.6		—
ABS	1,867,650		10,312		14,945		1,863,017		4.8		275
CMBS	1,282,015		8,403		16,884		1,273,534		3.3		—
U.S. government	1,500,703		6,359		94,653		1,412,409		3.6		—
State and political subdivisions	889,218		36,410		13,637		911,991		2.3		—
Other foreign government	3,220,697		98,574		42,020		3,277,251		8.4		—
Total fixed maturity securities	$	37,751,132	$	1,907,163	$	653,083	$	39,005,212	100.0	%	$	275

 The following table provides information relating to investments in fixed maturity and equity securities by sector as of December 31, 2017 (dollars in thousands):

December 31, 2017:	Amortized Cost		Unrealized Gains		Unrealized Losses		Estimated Fair Value		% of Total		Other-than- temporary impairments in AOCI
Available-for-sale:
Corporate	$	21,966,803	$	1,299,594	$	55,429	$	23,210,968	60.9	%	$	—
Canadian government	2,843,273		1,378,510		1,707		4,220,076		11.1		—
RMBS	1,695,126		36,632		11,878		1,719,880		4.5		—
ABS	1,634,758		18,798		5,194		1,648,362		4.3		275
CMBS	1,285,594		22,627		4,834		1,303,387		3.4		—
U.S. government	1,953,436		12,089		21,933		1,943,592		5.1		—
State and political subdivisions	647,727		59,997		4,296		703,428		1.8		—
Other foreign government	3,254,695		154,507		8,075		3,401,127		8.9		—
Total fixed maturity securities	$	35,281,412	$	2,982,754	$	113,346	$	38,150,820	100.0	%	$	275
Non-redeemable preferred stock	$	41,553	$	479	$	2,226	$	39,806	39.7	%
Other equity securities	61,288		479		1,421		60,346		60.3
Total equity securities	$	102,841	$	958	$	3,647	$	100,152	100.0	%

The Company enters into various collateral arrangements with counterparties that require both the pledging and acceptance of fixed maturity securities as collateral. Pledged fixed maturity securities are included in fixed maturity securities, available-for-sale in the condensed consolidated balance sheets. Fixed maturity securities received as collateral are held in separate custodial accounts and are not recorded on the Company’s condensed consolidated balance sheets. Subject to certain constraints, the Company is permitted by contract to sell or repledge collateral it receives; however, as of September 30, 2018 and December 31, 2017, none of the collateral received had been sold or repledged. The Company also holds assets in trust to satisfy collateral requirements under derivative transactions and certain third-party reinsurance treaties. The following table includes fixed maturity securities pledged and received as collateral and assets in trust held to satisfy collateral requirements under derivative transactions and certain third-party reinsurance treaties as of September 30, 2018 and December 31, 2017 (dollars in thousands):

10

	September 30, 2018				December 31, 2017
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Fixed maturity securities pledged as collateral	$	67,899	$	69,792	$	72,542	$	75,622
Fixed maturity securities received as collateral	n/a		592,146		n/a		590,417
Assets in trust held to satisfy collateral requirements	19,263,724		19,670,559		15,584,296		16,715,281

The Company monitors its concentrations of financial instruments on an ongoing basis and mitigates credit risk by maintaining a diversified investment portfolio which limits exposure to any one issuer. The Company’s exposure to concentrations of credit risk from single issuers greater than 10% of the Company’s stockholders’ equity included securities of the U.S. government and its agencies as well as the securities disclosed below as of September 30, 2018 and December 31, 2017 (dollars in thousands).

	September 30, 2018				December 31, 2017
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Fixed maturity securities guaranteed or issued by:
Canadian province of Quebec	$	1,158,326	$	1,833,972	$	1,119,337	$	1,917,996
Canadian province of Ontario	951,186		1,225,712		939,837		1,282,944

The amortized cost and estimated fair value of fixed maturity securities classified as available-for-sale at September 30, 2018 are shown by contractual maturity in the table below (dollars in thousands). Actual maturities can differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Asset and mortgage-backed securities are shown separately in the table below, as they are not due at a single maturity date.

	Amortized Cost		Estimated Fair Value
Available-for-sale:
Due in one year or less	$	986,289	$	993,352
Due after one year through five years	7,797,732		7,888,116
Due after five years through ten years	9,311,737		9,407,186
Due after ten years	14,688,760		15,799,245
Asset and mortgage-backed securities	4,966,614		4,917,313
Total	$	37,751,132	$	39,005,212

Corporate Fixed Maturity Securities

The tables below show the major industry types of the Company’s corporate fixed maturity holdings as of September 30, 2018 and December 31, 2017 (dollars in thousands):

September 30, 2018:			Estimated
	Amortized Cost		Fair Value		% of Total
Finance	$	8,561,885	$	8,564,254	35.1	%
Industrial	12,632,502		12,753,024		52.1
Utility	3,077,080		3,132,220		12.8
Total	$	24,271,467	$	24,449,498	100.0	%
December 31, 2017:			Estimated
	Amortized Cost		Fair Value		% of Total
Finance	$	7,977,885	$	8,362,774	36.1	%
Industrial	11,535,166		12,199,333		52.5
Utility	2,453,752		2,648,861		11.4
Total	$	21,966,803	$	23,210,968	100.0	%

11

Other-Than-Temporary Impairments - Fixed Maturity Securities

As discussed in Note 2 – “Summary of Significant Accounting Policies” of the 2017 Annual Report, a portion of certain other-than-temporary impairment (“OTTI”) losses on fixed maturity securities is recognized in AOCI. For these securities, the net amount recognized in the condensed consolidated statements of income (“credit loss impairments”) represents the difference between the amortized cost of the security and the net present value of its projected future cash flows discounted at the effective interest rate implicit in the debt security prior to impairment. Any remaining difference between the fair value and amortized cost is recognized in AOCI. The following table sets forth the amount of pre-tax credit loss impairments on fixed maturity securities held by the Company as of the dates indicated, for which a portion of the OTTI loss was recognized in AOCI, and the corresponding changes in such amounts (dollars in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Balance, beginning of period	$	3,677	$	3,677	$	3,677	$	6,013
Credit loss OTTI previously recognized on securities impaired to fair value during the period	—		—		—		(2,336		)
Balance, end of period	$	3,677	$	3,677	$	3,677	$	3,677

Unrealized Losses for Fixed Maturity and Equity Securities Available-for-Sale

The following table presents the total gross unrealized losses for the 2,866 fixed maturity securities as of September 30, 2018, where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in thousands):

	September 30, 2018
	Gross Unrealized Losses		% of Total
Less than 20%	$	640,481	98.1	%
20% or more for less than six months	309		—
20% or more for six months or greater	12,293		1.9
Total	$	653,083	100.0	%

The following table presents the total gross unrealized losses for the 1,116 fixed maturity and equity securities at December 31, 2017 where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in thousands):

	December 31, 2017
	Gross Unrealized Losses		% of Total
Less than 20%	$	113,466	97.0	%
20% or more for less than six months	689		0.6
20% or more for six months or greater	2,838		2.4
Total	$	116,993	100.0	%

The Company’s determination of whether a decline in value is other-than-temporary includes an analysis of the underlying credit and the extent and duration of a decline in value. The Company’s credit analysis of an investment includes determining whether the issuer is current on its contractual payments, evaluating whether it is probable that the Company will be able to collect all amounts due according to the contractual terms of the security and analyzing the overall ability of the Company to recover the amortized cost of the investment.

The following table presents the estimated fair values and gross unrealized losses, including other-than-temporary impairment losses reported in AOCI, for 2,866 fixed maturity securities that have estimated fair values below amortized cost as of September 30, 2018 (dollars in thousands). These investments are presented by class and grade of security, as well as the length of time the related fair value has remained below amortized cost.

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	Less than 12 months				12 months or greater				Total
			Gross				Gross				Gross
September 30, 2018:	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
Investment grade securities:
Corporate	$	10,117,970	$	303,926	$	1,290,804	$	81,236	$	11,408,774	$	385,162
Canadian government	58,816		1,211		107,167		2,736		165,983		3,947
RMBS	931,044		23,339		528,739		27,063		1,459,783		50,402
ABS	680,900		8,650		262,544		6,243		943,444		14,893
CMBS	555,716		8,304		207,943		8,580		763,659		16,884
U.S. government	197,114		3,913		1,002,661		90,740		1,199,775		94,653
State and political subdivisions	261,456		6,722		90,649		6,915		352,105		13,637
Other foreign government	1,034,417		24,666		297,566		11,062		1,331,983		35,728
Total investment grade securities	13,837,433		380,731		3,788,073		234,575		17,625,506		615,306
Below investment grade securities:
Corporate	539,521		23,955		77,675		7,296		617,196		31,251
Canadian government	2,328		162		—		—		2,328		162
RMBS	—		—		1,102		20		1,102		20
ABS	—		—		1,110		52		1,110		52
Other foreign government	140,692		5,931		6,410		361		147,102		6,292
Total below investment grade securities	682,541		30,048		86,297		7,729		768,838		37,777
Total fixed maturity securities	$	14,519,974	$	410,779	$	3,874,370	$	242,304	$	18,394,344	$	653,083

The following table presents the estimated fair values and gross unrealized losses, including other-than-temporary impairment losses reported in AOCI, for 1,116 fixed maturity and equity securities that have estimated fair values below amortized cost as of December 31, 2017 (dollars in thousands):

	Less than 12 months				12 months or greater				Total
			Gross				Gross				Gross
December 31, 2017:	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
Investment grade securities:
Corporate	$	1,886,212	$	17,099	$	1,009,750	$	28,080	$	2,895,962	$	45,179
Canadian government	18,688		91		111,560		1,596		130,248		1,687
RMBS	566,699		5,852		224,439		6,004		791,138		11,856
ABS	434,274		2,707		168,524		2,434		602,798		5,141
CMBS	220,401		1,914		103,269		2,920		323,670		4,834
U.S. government	800,298		6,177		767,197		15,756		1,567,495		21,933
State and political subdivisions	43,510		242		68,666		4,054		112,176		4,296
Other foreign government	369,717		2,707		191,265		4,704		560,982		7,411
Total investment grade securities	4,339,799		36,789		2,644,670		65,548		6,984,469		102,337
Below investment grade securities:
Corporate	194,879		3,317		75,731		6,933		270,610		10,250
Canadian government	1,995		20		—		—		1,995		20
RMBS	—		—		1,369		22		1,369		22
ABS	—		—		1,489		53		1,489		53
Other foreign government	28,600		113		15,134		551		43,734		664
Total below investment grade securities	225,474		3,450		93,723		7,559		319,197		11,009
Total fixed maturity securities	$	4,565,273	$	40,239	$	2,738,393	$	73,107	$	7,303,666	$	113,346
Non-redeemable preferred stock	$	82	$	1	$	26,471	$	2,225	$	26,553	$	2,226
Other equity securities	5,820		1,023		47,251		398		53,071		1,421
Total equity securities	$	5,902	$	1,024	$	73,722	$	2,623	$	79,624	$	3,647

The Company has no intention to sell, nor does it expect to be required to sell, the securities outlined in the table above, as of the dates indicated. However, unforeseen facts and circumstances may cause the Company to sell fixed maturity securities in the

13

ordinary course of managing its portfolio to meet certain diversification, credit quality and liquidity guidelines. Changes in unrealized losses are primarily being driven by changes in interest rates.

Investment Income, Net of Related Expenses

Major categories of investment income, net of related expenses, consist of the following (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Fixed maturity securities available-for-sale	$	378,669		$	359,157		$	1,121,496		$	1,039,392
Equity securities	1,319			942			3,710			3,296
Mortgage loans on real estate	54,424			50,040			155,083			138,829
Policy loans	14,730			15,404			44,285			45,870
Funds withheld at interest	108,232			102,144			270,094			327,089
Short-term investments and cash and cash equivalents	3,067			1,977			9,276			5,266
Other invested assets	35,594			46,653			80,207			87,192
Investment income	596,035			576,317			1,684,151			1,646,934
Investment expense	(23,293		)	(19,399		)	(67,019		)	(57,114		)
Investment income, net of related expenses	$	572,742		$	556,918		$	1,617,132		$	1,589,820

Investment Related Gains (Losses), Net

Investment related gains (losses), net consist of the following (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Fixed maturity securities available for sale:
Other-than-temporary impairment losses	$	(10,705	)	$	(390	)	$	(14,055	)	$	(20,980	)
Gain on investment activity	20,040			19,512			52,146			91,611
Loss on investment activity	(37,880		)	(7,593		)	(94,194		)	(26,577		)
Equity securities:
Other-than-temporary impairment losses	—			(889		)	—			(889		)
Gain on investment activity	3,932			10			4,429			24
Loss on investment activity	(174		)	(85		)	(1,124		)	(4,135		)
Change in unrealized gains (losses) recognized in earnings	3,539			—			(7,564		)	—
Other impairment losses and change in mortgage loan provision	(6,566		)	(2,446		)	(8,235		)	(9,220		)
Derivatives and other, net	7,797			14,534			37,538			109,637
Total investment related gains (losses), net	$	(20,017	)	$	22,653		$	(31,059	)	$	139,471

The fixed maturity impairments for the three and nine months ended September 30, 2018 and 2017 were largely related to high-yield corporate securities. The equity impairments for the three and nine months ended September 30, 2017 were related to an equity position received as part of a debt restructuring. The other impairment losses and change in mortgage loan provision for the three and nine months ended September 30, 2018 includes impairments on real estate joint ventures and limited partnerships. The other impairment losses and change in mortgage loan provision for the three and nine months ended September 30, 2017 includes impairments on limited partnerships. The fluctuations in investment related gains (losses) for derivatives and other for the three and nine months ended September 30, 2018, compared to the same periods in 2017, are primarily due to changes in the fair value of embedded derivatives and interest rate swaps.

During the three months ended September 30, 2018 and 2017, the Company sold fixed maturity securities with fair values of $1,345.3 million and $479.7 million at losses of $37.9 million and $7.6 million, respectively. During the nine months ended September 30, 2018 and 2017, the Company sold fixed maturity securities with fair values of $3,783.3 million and $1,604.7 million at losses of $94.2 million and $26.6 million, respectively. During the three months ended September 30, 2018 and 2017, the Company sold equity securities with fair values of $3.1 million and $5.0 million at losses of $0.2 million and $0.1 million, respectively. During the nine months ended September 30, 2018 and 2017, the Company sold equity securities with fair values of $31.5 million and $166.7 million at losses of $1.1 million and $4.1 million, respectively. The Company generally does not buy and sell securities on a short-term basis.

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Securities Borrowing, Lending and Other

The following table includes the amount of borrowed securities, securities lent and securities collateral received as part of the securities lending program and repurchased/reverse repurchased securities pledged and received as of September 30, 2018 and December 31, 2017 (dollars in thousands).

	September 30, 2018				December 31, 2017
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Borrowed securities	$	353,650	$	370,323	$	358,875	$	377,820
Securities lending:
Securities loaned	101,965		102,489		117,246		121,551
Securities received	n/a		112,000		n/a		128,000
Repurchase program/reverse repurchase program:
Securities pledged	408,679		404,905		413,819		428,344
Securities received	n/a		400,515		n/a		417,550

The Company also held cash collateral for securities lending and the repurchase program/reverse repurchase programs of $28.9 million and $31.2 million at September 30, 2018 and December 31, 2017, respectively. No cash or securities have been pledged by the Company for its securities borrowing program as of September 30, 2018 and December 31, 2017.

The following tables present information on the Company’s securities lending and repurchase transactions as of September 30, 2018 and December 31, 2017 (dollars in thousands). Collateral associated with certain borrowed securities is not included within the table, as the collateral pledged to each counterparty is the right to reinsurance treaty cash flows.

	September 30, 2018
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Securities lending transactions:
Corporate	$	—	$	—	$	—	$	102,489	$	102,489
Total	—		—		—		102,489		102,489
Repurchase transactions:
Corporate	—		—		—		132,228		132,228
U.S. government	—		—		—		219,906		219,906
Foreign government	—		—		—		52,771		52,771
Other	—		—		—		—		—
Total	—		—		—		404,905		404,905
Total transactions	$	—	$	—	$	—	$	507,394	$	507,394
Gross amount of recognized liabilities for securities lending and repurchase transactions in preceding table									$	541,411
Amounts related to agreements not included in offsetting disclosure									$	34,017

15

	December 31, 2017
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Securities lending transactions:
Corporate	$	—	$	—	$	—	$	121,551	$	121,551
Total	$	—	$	—	$	—	$	121,551	$	121,551
Repurchase transactions:
Corporate	$	—	$	—	$	312	$	184,334	$	184,646
U.S. government	—		—		—		220,765		220,765
Foreign government	—		—		—		21,802		21,802
Other	1,131		—		—		—		1,131
Total	1,131		—		312		426,901		428,344
Total borrowings	$	1,131	$	—	$	312	$	548,452	$	549,895
Gross amount of recognized liabilities for securities lending and repurchase transactions in preceding table									$	576,786
Amounts related to agreements not included in offsetting disclosure									$	26,891

The Company has elected to offset amounts recognized as receivables and payables resulting from the repurchase/reverse repurchase programs. After the effect of offsetting, the net amount presented on the condensed consolidated balance sheets was a liability of $0.4 million and $1.1 million of September 30, 2018 and December 31, 2017, respectively. As of September 30, 2018 and December 31, 2017, the Company recognized payables resulting from cash received as collateral associated with a repurchase agreement as discussed above. Amounts owed to and due from the counterparties may be settled in cash or offset, in accordance with the agreements.

Mortgage Loans on Real Estate

Mortgage loans represented approximately 9.0% and 8.5% of the Company’s total investments as of September 30, 2018 and December 31, 2017. As of September 30, 2018, mortgage loans were geographically dispersed throughout the U.S. with the largest concentrations in California (18.8%), Texas (10.0%) and Georgia (7.5%) and include loans secured by properties in Canada (2.6%). The recorded investment in mortgage loans on real estate presented below is gross of unamortized deferred loan origination fees and expenses, and valuation allowances.

The distribution of mortgage loans by property type is as follows as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018					December 31, 2017
Property type:	Carrying Value			% of Total		Carrying Value			% of Total
Office building	$	1,633,887		34.1	%	$	1,487,392		33.6	%
Retail	1,365,157			28.5		1,270,676			28.8
Industrial	983,553			20.5		938,612			21.3
Apartment	543,917			11.3		510,052			11.6
Other commercial	267,712			5.6		206,439			4.7
Recorded investment	4,794,226			100.0	%	4,413,171			100.0	%
Unamortized balance of loan origination fees and expenses	(4,786		)			(3,254		)
Valuation allowances	(10,366		)			(9,384		)
Total mortgage loans on real estate	$	4,779,074				$	4,400,533

The maturities of mortgage loans as of September 30, 2018 and December 31, 2017 are as follows (dollars in thousands):

	September 30, 2018				December 31, 2017
	Recorded Investment		% of Total		Recorded Investment		% of Total
Due within five years	$	1,216,241	25.4	%	$	1,091,066	24.8	%
Due after five years through ten years	2,738,400		57.1		2,516,872		57.0
Due after ten years	839,585		17.5		805,233		18.2
Total	$	4,794,226	100.0	%	$	4,413,171	100.0	%

16

The following tables set forth certain key credit quality indicators of the Company’s recorded investment in mortgage loans as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	Recorded Investment
	Debt Service Ratios						Construction loans
	>1.20x		1.00x - 1.20x		<1.00x				Total		% of Total
September 30, 2018:
Loan-to-Value Ratio
0% - 59.99%	$	2,146,401	$	63,794	$	43,486	$	25,724	$	2,279,405	47.6	%
60% - 69.99%	1,666,525		117,726		62,617		—		1,846,868		38.5
70% - 79.99%	386,137		70,884		76,054		—		533,075		11.1
Greater than 80%	108,233		22,429		4,216		—		134,878		2.8
Total	$	4,307,296	$	274,833	$	186,373	$	25,724	$	4,794,226	100.0	%

	Recorded Investment
	Debt Service Ratios						Construction loans
	>1.20x		1.00x - 1.20x		<1.00x				Total		% of Total
December 31, 2017:
Loan-to-Value Ratio
0% - 59.99%	$	2,148,428	$	53,979	$	3,801	$	—	$	2,206,208	50.0	%
60% - 69.99%	1,517,029		47,128		43,921		—		1,608,078		36.4
70% - 79.99%	396,446		19,461		15,367		—		431,274		9.8
Greater than 80%	120,850		30,713		6,362		9,686		167,611		3.8
Total	$	4,182,753	$	151,281	$	69,451	$	9,686	$	4,413,171	100.0	%

The age analysis of the Company’s past due recorded investments in mortgage loans as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018		December 31, 2017
31-60 days past due	$	—	$	17,100
61-90 days past due	—		2,056
Total past due	—		19,156
Current	4,794,226		4,394,015
Total	$	4,794,226	$	4,413,171

The following table presents the recorded investment in mortgage loans, by method of measuring impairment, and the related valuation allowances as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018		December 31, 2017
Mortgage loans:
Individually measured for impairment	$	30,629	$	5,858
Collectively measured for impairment	4,763,597		4,407,313
Recorded investment	$	4,794,226	$	4,413,171
Valuation allowances:
Individually measured for impairment	$	—	$	—
Collectively measured for impairment	10,366		9,384
Total valuation allowances	$	10,366	$	9,384

17

Information regarding the Company’s loan valuation allowances for mortgage loans for the three and nine months ended September 30, 2018 and 2017 is as follows (dollars in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018			2017
Balance, beginning of period	$	9,706	$	8,156	$	9,384		$	7,685
Provision (release)	656		977		986			1,444
Translation adjustment	4		4		(4		)	8
Balance, end of period	$	10,366	$	9,137	$	10,366		$	9,137

Information regarding the portion of the Company’s mortgage loans that were impaired as of September 30, 2018 and December 31, 2017 is as follows (dollars in thousands):

	Unpaid Principal Balance		Recorded Investment		Related Allowance		Carrying Value
September 30, 2018:
Impaired mortgage loans with no valuation allowance recorded	$	30,660	$	30,629	$	—	$	30,629
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	30,660	$	30,629	$	—	$	30,629
December 31, 2017:
Impaired mortgage loans with no valuation allowance recorded	$	6,427	$	5,858	$	—	$	5,858
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	6,427	$	5,858	$	—	$	5,858
The Company’s average investment in impaired mortgage loans and the related interest income are reflected in the table below for the periods indicated (dollars in thousands):
	Three months ended September 30,
	2018				2017
	Average Recorded Investment(1)		Interest Income		Average Recorded   Investment(1)		Interest Income
Impaired mortgage loans with no valuation allowance recorded	$	30,641	$	346	$	3,967	$	33
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	30,641	$	346	$	3,967	$	33
	Nine months ended September 30,
	2018				2017
	Average Recorded Investment(1)		Interest Income		Average Recorded Investment(1)		Interest Income
Impaired mortgage loans with no valuation allowance recorded	$	22,641	$	650	$	3,062	$	100
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	22,641	$	650	$	3,062	$	100

(1) Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balances.

The Company did not acquire any impaired mortgage loans during the nine months ended September 30, 2018 and 2017. The Company had no mortgage loans that were on a nonaccrual status at September 30, 2018 and December 31, 2017.

Policy Loans

Policy loans comprised approximately 2.5% and 2.6% of the Company’s total investments as of September 30, 2018 and December 31, 2017, respectively, the majority of which are associated with one client. These policy loans present no credit risk because the amount of the loan cannot exceed the obligation due to the ceding company upon the death of the insured or surrender of the underlying policy. The provisions of the treaties in force and the underlying policies determine the policy loan interest rates. The Company earns a spread between the interest rate earned on policy loans and the interest rate credited to corresponding liabilities.

18

Funds Withheld at Interest

Funds withheld at interest comprised approximately 11.3% and 11.8% of the Company’s total investments as of both September 30, 2018 and December 31, 2017. Of the $6.0 billion funds withheld at interest balance, net of embedded derivatives, as of September 30, 2018, $3.9 billion of the balance is associated with one client. For reinsurance agreements written on a modified coinsurance basis and certain agreements written on a coinsurance funds withheld basis, assets equal to the net statutory reserves are withheld and legally owned and managed by the ceding company and are reflected as funds withheld at interest on the Company’s condensed consolidated balance sheets. In the event of a ceding company’s insolvency, the Company would need to assert a claim on the assets supporting its reserve liabilities. However, the risk of loss to the Company is mitigated by its ability to offset amounts it owes the ceding company for claims or allowances against amounts owed to the Company from the ceding company.

Other Invested Assets

Other invested assets include limited partnership interests, joint ventures (other than operating joint ventures), equity release mortgages, derivative contracts and fair value option (“FVO”) contractholder-directed unit-linked investments. Other invested assets also include Federal Home Loan Bank of Des Moines (“FHLB”) common stock which is included in other in the table below. Other invested assets represented approximately 3.2% and 2.9% of the Company’s total investments as of September 30, 2018 and December 31, 2017, respectively. Carrying values of these assets as of September 30, 2018 and December 31, 2017 are as follows (dollars in thousands):

	September 30, 2018		December 31, 2017
Limited partnership interests and real estate joint ventures	$	924,006	$	781,124
Equity release mortgages	383,450		219,940
Derivatives	101,124		137,613
FVO contractholder-directed unit-linked investments	212,315		218,541
Other	86,084		148,114
Total other invested assets	$	1,706,979	$	1,505,332

19

5.    Derivative Instruments

Derivatives, except for embedded derivatives and longevity and mortality swaps, are carried on the Company’s condensed consolidated balance sheets in other invested assets or other liabilities, at fair value. Longevity and mortality swaps are included on the condensed consolidated balance sheets in other assets or other liabilities, at fair value. Embedded derivative assets and liabilities on modified coinsurance or funds withheld arrangements are included on the condensed consolidated balance sheets with the host contract in funds withheld at interest, at fair value. Embedded derivative liabilities on indexed annuity and variable annuity products are included on the condensed consolidated balance sheets with the host contract in interest-sensitive contract liabilities, at fair value. The following table presents the notional amounts and gross fair value of derivative instruments prior to taking into account the netting effects of master netting agreements as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018						December 31, 2017
	Notional		Carrying Value/Fair Value				Notional		Carrying Value/Fair Value
	Amount		Assets		Liabilities		Amount		Assets		Liabilities
Derivatives not designated as hedging instruments:
Interest rate swaps	$	1,074,173	$	37,238	$	1,818	$	996,204	$	59,809	$	2,372
Financial futures	347,916		—		—		412,438		—		—
Foreign currency forwards	—		—		—		6,030		—		28
Consumer price index swaps	409,023		127		2,836		221,932		—		2,160
Credit default swaps	1,373,300		6,759		114		961,200		8,319		1,651
Equity options	571,845		19,372		—		632,251		23,271		—
Longevity swaps	928,320		46,090		—		960,400		40,659		—
Mortality swaps	25,000		—		308		—		—		1,683
Synthetic guaranteed investment contracts	10,844,558		—		—		10,052,576		—		—
Embedded derivatives in:
Modified coinsurance or funds withheld arrangements	—		142,529		—		—		122,194		—
Indexed annuity products	—		—		815,970		—		—		861,758
Variable annuity products	—		—		90,229		—		—		152,470
Total non-hedging derivatives	15,574,135		252,115		911,275		14,243,031		254,252		1,022,122
Derivatives designated as hedging instruments:
Interest rate swaps	435,000		99		20,579		435,000		—		20,389
Foreign currency swaps	537,249		46,141		3,770		672,921		65,207		8,496
Foreign currency forwards	834,238		8,948		2,067		553,175		1,265		7,720
Total hedging derivatives	1,806,487		55,188		26,416		1,661,096		66,472		36,605
Total derivatives	$	17,380,622	$	307,303	$	937,691	$	15,904,127	$	320,724	$	1,058,727

Netting Arrangements

Certain of the Company’s derivatives are subject to enforceable master netting arrangements and reported as a net asset or liability in the condensed consolidated balance sheets. The Company nets all derivatives that are subject to such arrangements.

The Company has elected to include all derivatives, except embedded derivatives, in the tables below, irrespective of whether they are subject to an enforceable master netting arrangement or a similar agreement. See Note 4 – “Investments” for information regarding the Company’s securities borrowing, lending, repurchase and repurchase/reverse repurchase programs. See “Embedded Derivatives” below for information regarding the Company’s bifurcated embedded derivatives.

The following table provides information relating to the Company’s derivative instruments as of September 30, 2018 and December 31, 2017 (dollars in thousands):

								Gross Amounts Not Offset in the Balance Sheet
	Gross Amounts    Recognized		Gross Amounts Offset in the Balance Sheet			Net Amounts Presented in the Balance Sheet		Financial Instruments (1)			Cash Collateral    Pledged/ Received			Net Amount
September 30, 2018:
Derivative assets	$	164,774	$	(17,560	)	$	147,214	$	—		$	(159,194	)	$	(11,980	)
Derivative liabilities	31,492		(17,560		)	13,932		(61,293		)	(13,400		)	(60,761		)
December 31, 2017:
Derivative assets	$	198,530	$	(20,258	)	$	178,272	$	(862	)	$	(185,900	)	$	(8,490	)
Derivative liabilities	44,499		(20,258		)	24,241		(58,156		)	(22,221		)	(56,136		)

(1) Includes initial margin posted to a central clearing partner.

20

Accounting for Derivative Instruments and Hedging Activities

The Company does not enter into derivative instruments for speculative purposes. As discussed below under “Non-qualifying Derivatives and Derivatives for Purposes Other Than Hedging,” the Company uses various derivative instruments for risk management purposes that either do not qualify or have not been qualified for hedge accounting treatment. As of September 30, 2018 and December 31, 2017, the Company held interest rate swaps that were designated and qualified as cash flow hedges of interest rate risk, for variable rate liabilities and foreign currency assets, foreign currency swaps and foreign currency forwards that were designated and qualified as hedges of a portion of its net investment in its foreign operations, foreign currency swaps that were designated and qualified as fair value hedges of foreign currency risk, and derivative instruments that were not designated as hedging instruments. See Note 2 – “Summary of Significant Accounting Policies” of the Company’s 2017 Annual Report for a detailed discussion of the accounting treatment for derivative instruments, including embedded derivatives. Derivative instruments are carried at fair value and generally require an insignificant amount of cash at inception of the contracts.

Fair Value Hedges

The Company designates and reports certain foreign currency swaps to hedge the foreign currency fair value exposure of foreign currency denominated assets as fair value hedges when they meet the requirements of the general accounting principles for Derivatives and Hedging. The gain or loss on the hedged item attributable to a change in foreign currency and the offsetting gain or loss on the related foreign currency swaps as of September 30, 2018 and 2017, were (dollars in thousands):

Type of Fair Value Hedge	Hedged Item	Gains (Losses) Recognized for Derivatives (1)			Gains (Losses) Recognized for Hedged Items (1)
For the three months ended September 30, 2018:
Foreign currency swaps	Foreign-denominated fixed maturity securities	$	(2,258	)	$	2,832
For the three months ended September 30, 2017:
Foreign currency swaps	Foreign-denominated fixed maturity securities	$	2,100		$	(2,100	)
For the nine months ended September 30, 2018:
Foreign currency swaps	Foreign-denominated fixed maturity securities	$	(5,284	)	$	9,666
For the nine months ended September 30, 2017:
Foreign currency swaps	Foreign-denominated fixed maturity securities	$	9,541		$	(9,541	)

(1) The net amount represents the ineffective portion of the fair value hedges

Cash Flow Hedges

Certain derivative instruments are designated as cash flow hedges when they meet the requirements of the general accounting principles for Derivatives and Hedging. The Company designates and accounts for the following as cash flows: (i) certain interest rate swaps, in which the cash flows of liabilities are variable based on a benchmark rate; (ii) certain interest rate swaps, in which the cash flows of assets are denominated in different currencies, commonly referred to as cross-currency swaps; and (iii) forward bond purchase commitments.

The following table presents the components of AOCI, before income tax, and the condensed consolidated income statement classification where the gain or loss is recognized related to cash flow hedges for the three and nine months ended September 30, 2018 and 2017 (dollars in thousands):

21

	Three months ended September 30,
	2018			2017
Balance beginning of period	$	22,656		$	7,690
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	6,671			(6,889		)
Amounts reclassified to investment related (gains) losses, net	—			(183		)
Amounts reclassified to investment income	(50		)	(271		)
Amounts reclassified to interest expense	(234		)	—
Balance end of period	$	29,043		$	347
	Nine months ended September 30,
	2018			2017
Balance beginning of period	$	2,619		$	(2,496	)
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	26,586			3,689
Amounts reclassified to investment related (gains) losses, net	—			(142		)
Amounts reclassified to investment income	(270		)	(704		)
Amounts reclassified to interest expense	108			—
Balance end of period	$	29,043		$	347

As of September 30, 2018, the before-tax deferred net gains (losses) on derivative instruments recorded in AOCI that are expected to be reclassified to earnings during the next twelve months are approximately $0.2 million and $1.9 million in investment income and interest expense, respectively.

The following table presents the effective portion of derivatives in cash flow hedging relationships on the condensed consolidated statements of income and the condensed consolidated statements of comprehensive income for the three and nine months ended September 30, 2018 and 2017 (dollars in thousands):

	Effective Portion
Derivative Type	Gain (Loss) Deferred in OCI			Gain (Loss) Reclassified into Income from OCI
				Investment Related Gains (Losses)		Investment Income		Interest Expense
For the three months ended September 30, 2018:
Interest rate	$	7,490		$	—	$	—	$	234
Currency/Interest rate	(819		)	—		50		—
Total	$	6,671		$	—	$	50	$	234
For the three months ended September 30, 2017:
Interest rate	$	(8,421	)	$	—	$	—	$	—
Currency/Interest rate	1,544			—		230		—
Forward bond purchase commitments	(12		)	183		41		—
Total	$	(6,889	)	$	183	$	271	$	—
For the nine months ended September 30, 2018:
Interest rate	$	27,217		$	—	$	—	$	(108	)
Currency/Interest rate	(631		)	—		270		—
Total	$	26,586		$	—	$	270	$	(108	)
For the nine months ended September 30, 2017:
Interest rate	$	(6,205	)	$	—	$	—	$	—
Currency/Interest rate	9,894			—		560		—
Forward bond purchase commitments	—			142		144		—
Total	$	3,689		$	142	$	704	$	—

For the three and nine months ended September 30, 2018 and 2017, the ineffective portion of derivatives reported as cash flow hedges was not material to the Company’s results of operations. Also, there were no material amounts reclassified into earnings relating to instances in which the Company discontinued cash flow hedge accounting because the forecasted transaction did not occur by the anticipated date or within the additional time period permitted by the authoritative guidance for the accounting for derivatives and hedging.

22

Hedges of Net Investments in Foreign Operations

The Company uses foreign currency swaps and foreign currency forwards to hedge a portion of its net investment in certain foreign operations against adverse movements in exchange rates. The following table illustrates the Company’s net investments in foreign operations (“NIFO”) hedges for the three and nine months ended September 30, 2018 and 2017 (dollars in thousands):

	Derivative Gains (Losses) Deferred in AOCI
	For the three months ended September 30,						For the nine months ended September 30,
Type of NIFO Hedge (1) (2)	2018			2017			2018		2017
Foreign currency swaps	$	(5,877	)	$	(35,198	)	$	11,125	$	(60,723	)
Foreign currency forwards	(11,562		)	4,627			11,737		8,785
Total	$	(17,439	)	$	(30,571	)	$	22,862	$	(51,938	)

(1) There were no sales or substantial liquidations of net investments in foreign operations that would have required the reclassification of gains or losses from accumulated other comprehensive income (loss) into investment income during the periods presented.

(2) There was no ineffectiveness recognized for the Company’s hedges of net investments in foreign operations.

The cumulative foreign currency translation gain recorded in AOCI related to these hedges was $136.5 million and $113.7 million at September 30, 2018 and December 31, 2017, respectively. If a hedged foreign operation was sold or substantially liquidated, the amounts in AOCI would be reclassified to the condensed consolidated statements of income. A pro rata portion would be reclassified upon partial sale of a hedged foreign operation.

Non-qualifying Derivatives and Derivatives for Purposes Other Than Hedging

The Company uses various other derivative instruments for risk management purposes that either do not qualify or have not been qualified for hedge accounting treatment. The gain or loss related to the change in fair value for these derivative instruments is recognized in investment related gains (losses), net in the condensed consolidated statements of income, except where otherwise noted.

A summary of the effect of non-hedging derivatives, including embedded derivatives, on the Company’s condensed consolidated statements of income for the three and nine months ended September 30, 2018 and 2017 is as follows (dollars in thousands):

23

		Gain (Loss) for the three months ended September 30,
Type of Non-hedging Derivative	Income Statement Location of Gain (Loss)	2018			2017
Interest rate swaps	Investment related gains (losses), net	$	(12,228	)	$	641
Financial futures	Investment related gains (losses), net	(6,544		)	(8,890		)
Foreign currency forwards	Investment related gains (losses), net	(58		)	24
CPI swaps	Investment related gains (losses), net	(4,223		)	220
Credit default swaps	Investment related gains (losses), net	4,689			4,137
Equity options	Investment related gains (losses), net	(9,793		)	(8,295		)
Longevity swaps	Other revenues	2,426			3,334
Mortality swaps	Other revenues	473			(132		)
Subtotal		(25,258		)	(8,961		)
Embedded derivatives in:
Modified coinsurance or funds withheld arrangements	Investment related gains (losses), net	(2,081		)	23,044
Indexed annuity products	Interest credited	(25,347		)	(13,133		)
Variable annuity products	Investment related gains (losses), net	32,133			(6,205		)
Total non-hedging derivatives		$	(20,553	)	$	(5,255	)
		Gain (Loss) for the nine months ended         September 30,
Type of Non-hedging Derivative	Income Statement Location of Gain (Loss)	2018			2017
Interest rate swaps	Investment related gains (losses), net	$	(47,399	)	$	12,318
Financial futures	Investment related gains (losses), net	(7,312		)	(28,107		)
Foreign currency forwards	Investment related gains (losses), net	3			577
CPI swaps	Investment related gains (losses), net	(996		)	211
Credit default swaps	Investment related gains (losses), net	5,371			15,374
Equity options	Investment related gains (losses), net	(15,207		)	(34,757		)
Longevity swaps	Other revenues	6,983			7,180
Mortality swaps	Other revenues	(326		)	(921		)
Subtotal		(58,883		)	(28,125		)
Embedded derivatives in:
Modified coinsurance or funds withheld arrangements	Investment related gains (losses), net	20,335			106,854
Indexed annuity products	Interest credited	6,523			(35,490		)
Variable annuity products	Investment related gains (losses), net	62,242			16,518
Total non-hedging derivatives		$	30,217		$	59,757

Types of Derivatives Used by the Company

Interest Rate Swaps

Interest rate swaps are used by the Company primarily to reduce market risks from changes in interest rates, to alter interest rate exposure arising from mismatches between assets and liabilities (duration mismatches) and to manage the risk of cash flows of liabilities that are variable based on a benchmark rate. With an interest rate swap, the Company agrees with another party to exchange, at specified intervals, the difference between two rates, which can be either fixed-rate or floating-rate interest amounts, tied to an agreed-upon notional principal amount. These transactions are executed pursuant to master agreements that provide for a single net payment or individual gross payments at each due date. The Company utilizes interest rate swaps in cash flow and non-qualifying hedging relationships.

Financial Futures

Exchange-traded futures are used primarily to economically hedge liabilities embedded in certain variable annuity products. With exchange-traded futures transactions, the Company agrees to purchase or sell a specified number of contracts, the value of which is determined by the relevant indices, and to post variation margin on a daily basis in an amount equal to the difference between the daily estimated fair values of those contracts. The Company enters into exchange-traded futures with regulated futures commission merchants that are members of the exchange.

24

Equity Options

Equity index options are used by the Company primarily to hedge minimum guarantees embedded in certain variable annuity products. To hedge against adverse changes in equity indices volatility, the Company buys put options. The contracts are net settled in cash based on differentials in the indices at the time of exercise and the strike price.

Consumer Price Index Swaps

Consumer price index (“CPI”) swaps are used by the Company primarily to economically hedge liabilities embedded in certain insurance products where value is directly affected by changes in a designated benchmark consumer price index. With a CPI swap transaction, the Company agrees with another party to exchange the actual amount of inflation realized over a specified period of time for a fixed amount of inflation determined at inception. These transactions are executed pursuant to master agreements that provide for a single net payment or individual gross payments to be made by the counterparty at each due date. Most of these swaps will require a single payment to be made by one counterparty at the maturity date of the swap.

Foreign Currency Swaps

Foreign currency swaps are used by the Company to reduce the risk from fluctuations in foreign currency exchange rates associated with its assets and liabilities denominated in foreign currencies. With a foreign currency swap transaction, the Company agrees with another party to exchange, at specified intervals, the difference between one currency and another at a forward exchange rate calculated by reference to an agreed upon principal amount. The principal amount of each currency is exchanged at the termination of the currency swap by each party. The Company uses foreign currency swaps in hedges of net investments in foreign operations and non-qualifying hedge relationships.

Foreign Currency Forwards

Foreign currency forwards are used by the Company to reduce the risk from fluctuations in foreign currency exchange rates associated with its assets and liabilities denominated in foreign currencies. With a foreign currency forward transaction, the Company agrees with another party to deliver a specified amount of an identified currency at a specified future date. The price is agreed upon at the time of the contract and payment for such a contract is made in a different currency at the specified future date. The Company uses foreign currency forwards in hedges of net investments in foreign operations and non-qualifying hedge relationships.

Forward Bond Purchase Commitments

Forward bond purchase commitments have been used by the Company to hedge against the variability in the anticipated cash flows required to purchase securities. With forward bond purchase commitments, the forward price is agreed upon at the time of the contract and payment for such contract is made at the future specified settlement date of the securities.

Credit Default Swaps

The Company sells protection under single name credit default swaps and credit default swap index tranches to diversify its credit risk exposure in certain portfolios and, in combination with purchasing securities, to replicate characteristics of similar investments based on the credit quality and term of the credit default swap. Credit default triggers for indexed reference entities and single name reference entities are defined in the contracts. The Company’s maximum exposure to credit loss equals the notional value for credit default swaps. In the event of default of a referencing entity, the Company is typically required to pay the protection holder the full notional value less a recovery amount determined at auction.

25

The following table presents the estimated fair value, maximum amount of future payments and weighted average years to maturity of credit default swaps sold by the Company at September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018						December 31, 2017
Rating Agency Designation of Referenced Credit Obligations(1)	Estimated Fair Value of Credit   Default Swaps			Maximum Amount of Future Payments under Credit Default Swaps(2)		Weighted Average Years to Maturity(3)	Estimated Fair Value of Credit   Default Swaps			Maximum Amount of Future Payments under Credit Default Swaps(2)		Weighted Average Years to Maturity(3)
AAA/AA+/AA/AA-/A+/A/A-
Single name credit default swaps	$	2,470		$	152,000	2.5	$	3,128		$	162,000	2.9
Subtotal	2,470			152,000		2.5	3,128			162,000		2.9
BBB+/BBB/BBB-
Single name credit default swaps	4,220			343,700		2.4	4,469			361,700		2.9
Credit default swaps referencing indices	(80		)	642,600		3.4	(55		)	422,600		4.0
Subtotal	4,140			986,300		3.1	4,414			784,300		3.5
BB+/BB/BB-
Single name credit default swaps	32			15,000		1.0	30			5,000		1.5
Subtotal	32			15,000		1.0	30			5,000		1.5
Total	$	6,642		$	1,153,300	3.0	$	7,572		$	951,300	3.4

(1) The rating agency designations are based on ratings from Standard and Poor’s (“S&P”).

(2) Assumes the value of the referenced credit obligations is zero.

(3) The weighted average years to maturity of the credit default swaps is calculated based on weighted average notional amounts.

The Company also purchases credit default swaps to reduce its risk against a drop in bond prices due to credit concerns of certain bond issuers. If a credit event, as defined by the contract, occurs, the Company is able to put the bond back to the counterparty at par.

Longevity Swaps

The Company enters into longevity swaps in the form of out-of-the-money options, which provide protection against changes in mortality improvement to retirement plans and insurers of such plans. With a longevity swap transaction, the Company agrees with another party to exchange a proportion of a notional value. The proportion is determined by the difference between a predefined benefit, and the realized benefit plus the future expected benefit, calculated by reference to a population index for a fixed premium.

Mortality Swaps

Mortality swaps are used by the Company to hedge risk from changes in mortality experience associated with its reinsurance of life insurance risk. The Company agrees with another party to exchange, at specified intervals, a proportion of a notional value determined by the difference between a predefined expected and realized claim amount on a designated index of reinsured lives, for a fixed percentage (premium) each term.

Synthetic Guaranteed Investment Contracts

The Company sells fee-based synthetic guaranteed investment contracts to retirement plans which include investment-only, stable value contracts. The assets are owned by the trustees of such plans, who invest the assets under the terms of investment guidelines to which the Company agrees. The contracts contain a guarantee of a minimum rate of return on participant balances supported by the underlying assets, and a guarantee of liquidity to meet certain participant-initiated plan cash flow requirements. These contracts are reported as derivatives and recorded at fair value.

Embedded Derivatives

The Company has certain embedded derivatives which are required to be separated from their host contracts and reported as derivatives. Host contracts include reinsurance treaties structured on a modified coinsurance (“modco”) or funds withheld basis. Additionally, the Company reinsures equity-indexed annuity and variable annuity contracts with benefits that are considered embedded derivatives, including guaranteed minimum withdrawal benefits, guaranteed minimum accumulation benefits, and guaranteed minimum income benefits. The changes in fair values of embedded derivatives on equity-indexed annuities described below relate to changes in the fair value associated with capital market and other related assumptions. The Company’s utilization of a credit valuation adjustment (“CVA”) did not have a material effect on the change in fair value of its embedded derivatives for the three and nine months ended September 30, 2018 and 2017.

The related gains (losses) and the effect on net income after amortization of deferred acquisition costs (“DAC”) and income taxes for the three and nine months ended September 30, 2018 and 2017 are reflected in the following table (dollars in thousands):

26

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Embedded derivatives in modco or funds withheld arrangements included in investment related gains	$	(2,081	)	$	23,044		$	20,335		$	106,854
After the associated amortization of DAC and taxes, the related amounts included in net income	(1,320		)	7,515			11,517			36,300
Embedded derivatives in variable annuity contracts included in investment related gains	32,133			(6,205		)	62,242			16,518
After the associated amortization of DAC and taxes, the related amounts included in net income	9,463			(1,074		)	33,061			30,785
Amounts related to embedded derivatives in equity-indexed annuities included in benefits and expenses	(25,347		)	(13,133		)	6,523			(35,490		)
After the associated amortization of DAC and taxes, the related amounts included in net income	(17,311		)	(9,737		)	(6,808		)	(38,059		)

Credit Risk

The Company manages its credit risk related to over-the-counter (“OTC”) derivatives by entering into transactions with creditworthy counterparties, maintaining collateral arrangements and through the use of master netting agreements that provide for a single net payment to be made by one counterparty to another at each due date and upon termination.

The credit exposure of the Company’s OTC derivative transactions is represented by the contracts with a positive fair value (market value) at the reporting date. To reduce credit exposures, the Company seeks to (i) enter into OTC derivative transactions pursuant to master netting agreements that provide for a netting of payments and receipts with a single counterparty, and (ii) enter into agreements that allow the use of credit support annexes, which are bilateral rating-sensitive agreements that require collateral postings at established threshold levels. Certain of the Company’s OTC derivatives are cleared derivatives, which are bilateral transactions between the Company and a counterparty where the transactions are cleared through a clearinghouse, such that each derivative counterparty is only exposed to the default of the clearinghouse. These cleared transactions require initial and daily variation margin collateral postings and include certain interest rate swaps and credit default swaps entered into on or after June 10, 2013, related to guidelines implemented under the Dodd-Frank Wall Street Reform and Consumer Protection Act. In 2017, the Company followed the Chicago Mercantile Exchange amended rulebook to legally characterize variation margin payments as settlements of the derivative’s mark-to-market exposure and not collateral. Also, the Company enters into exchange-traded futures through regulated exchanges and these transactions are settled on a daily basis, thereby reducing credit risk exposure in the event of non-performance by counterparties to such financial instruments.

The Company enters into various collateral arrangements, which require both the posting and accepting of collateral in connection with its derivative instruments. Collateral agreements contain attachment thresholds that may vary depending on the posting party’s ratings. Additionally, a decline in the Company’s or the counterparty’s credit ratings to specified levels could result in potential settlement of the derivative positions under the Company’s agreements with its counterparties. The Company also has exchange-traded futures, which require the maintenance of a margin account. As exchange-traded futures are affected through regulated exchanges, and positions are marked to market on a daily basis, the Company has minimal exposure to credit-related losses in the event of nonperformance by counterparties.

The Company’s credit exposure related to derivative contracts is generally limited to the fair value at the reporting date plus or minus any collateral posted or held by the Company. The Company’s credit exposure to mortality swaps is minimal, as they are fully collateralized by a counterparty. Information regarding the Company’s credit exposure related to its over-the-counter derivative contracts, centrally cleared derivative contracts and margin account for exchange-traded futures, excluding mortality swaps, at September 30, 2018 and December 31, 2017 are reflected in the following table (dollars in thousands):

	September 30, 2018			December 31, 2017
Estimated fair value of derivatives in net asset position	$	133,590		$	155,714
Cash provided as collateral(1)	13,400			22,221
Securities pledged to counterparties as collateral(2)	61,293			58,156
Cash pledged from counterparties as collateral(3)	(159,194		)	(185,900		)
Securities pledged from counterparties as collateral(4)	—			(862		)
Initial margin for cleared derivatives(2)	(61,293		)	(58,156		)
Net amount after application of master netting agreements and collateral	$	(12,204	)	$	(8,827	)
Margin account related to exchange-traded futures(5)	$	8,348		$	6,538

(1) Consists of receivable from counterparty, included in other assets.

(2) Included in available-for-sale securities, primarily consists of U.S. Treasury and government agency securities.

(3) Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities.

(4) Consists of U.S. Treasury and government securities.

(5) Included in other assets.

27

6.    Fair Value of Assets and Liabilities

Fair Value Measurement

General accounting principles for Fair Value Measurements and Disclosures define fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. These principles also establish a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value and describes three levels of inputs that may be used to measure fair value:

Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities. The Company’s Level 1 assets and liabilities are traded in active exchange markets.

Level 2 - Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or market standard valuation techniques and assumptions that use significant inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the related assets or liabilities. Prices are determined using valuation methodologies such as discounted cash flow models and other similar techniques that require management’s judgment or estimation in developing inputs that are consistent with those other market participants would use when pricing similar assets and liabilities. Additionally, the Company’s embedded derivatives, all of which are associated with reinsurance treaties and longevity and mortality swaps, are classified in Level 3 since their values include significant unobservable inputs.

For a discussion of the Company’s valuation methodologies for assets and liabilities measured at fair value and the fair value hierarchy, see Note 6 in the Notes to Consolidated Financial Statements included in the Company’s 2017 Annual Report.

28

Assets and Liabilities by Hierarchy Level

Assets and liabilities measured at fair value on a recurring basis as of September 30, 2018 and December 31, 2017 are summarized below (dollars in thousands):

September 30, 2018:				Fair Value Measurements Using:
	Total			Level 1		Level 2			Level 3
Assets:
Fixed maturity securities – available-for-sale:
Corporate	$	24,449,498		$	—	$	23,193,563		$	1,255,935
Canadian government	4,036,750			—		3,488,008			548,742
RMBS	1,780,762			—		1,780,762			—
ABS	1,863,017			—		1,780,250			82,767
CMBS	1,273,534			—		1,271,752			1,782
U.S. government	1,412,409			1,284,932		107,225			20,252
State and political subdivisions	911,991			—		898,346			13,645
Other foreign government	3,277,251			—		3,272,239			5,012
Total fixed maturity securities – available-for-sale	39,005,212			1,284,932		35,792,145			1,928,135
Equity securities	101,069			57,584		—			43,485
Funds withheld at interest – embedded derivatives	142,529			—		—			142,529
Cash equivalents	657,280			657,280		—			—
Short-term investments	186,051			5,957		177,891			2,203
Other invested assets:
Derivatives:
Interest rate swaps	29,106			—		29,106			—
Foreign currency forwards	6,881			—		6,881			—
CPI swaps	(13		)	—		(13		)	—
Credit default swaps	5,961			—		5,961			—
Equity options	16,818			—		16,818			—
Foreign currency swaps	42,371			—		42,371			—
FVO contractholder-directed unit-linked investments	212,315			211,253		1,062			—
Total other invested assets	313,439			211,253		102,186			—
Other assets - longevity swaps	46,090			—		—			46,090
Total	$	40,451,670		$	2,217,006	$	36,072,222		$	2,162,442
Liabilities:
Interest sensitive contract liabilities – embedded derivatives	$	906,199		$	—	$	—		$	906,199
Other liabilities:
Derivatives:
Interest rate swaps	14,166			—		14,166			—
CPI swaps	2,696			—		2,696			—
Credit default swaps	(684		)	—		(684		)	—
Equity options	(2,554		)	—		(2,554		)	—
Mortality swaps	308			—		—			308
Total	$	920,131		$	—	$	13,624		$	906,507

29

December 31, 2017:				Fair Value Measurements Using:
	Total			Level 1		Level 2			Level 3
Assets:
Fixed maturity securities – available-for-sale:
Corporate	$	23,210,968		$	—	$	21,873,696		$	1,337,272
Canadian government	4,220,076			—		3,626,134			593,942
RMBS	1,719,880			—		1,611,998			107,882
ABS	1,648,362			—		1,524,888			123,474
CMBS	1,303,387			—		1,300,153			3,234
U.S. government	1,943,592			1,818,006		103,075			22,511
State and political subdivisions	703,428			—		662,225			41,203
Other foreign government	3,401,127			—		3,396,035			5,092
Total fixed maturity securities – available-for-sale	38,150,820			1,818,006		34,098,204			2,234,610
Equity securities:
Non-redeemable preferred stock	39,806			39,806		—			—
Other equity securities	60,346			60,346		—			—
Funds withheld at interest – embedded derivatives	122,194			—		—			122,194
Cash equivalents	356,788			354,071		2,717			—
Short-term investments	50,746			—		47,650			3,096
Other invested assets:
Derivatives:
Interest rate swaps	51,359			—		51,359			—
Foreign currency forwards	730			—		730			—
CPI swaps	(221		)	—		(221		)	—
Credit default swaps	5,908			—		5,908			—
Equity options	16,932			—		16,932			—
Foreign currency swaps	62,905			—		62,905			—
FVO contractholder-directed unit-linked investments	218,541			217,618		923			—
Total other invested assets	356,154			217,618		138,536			—
Other assets - longevity swaps	40,659			—		—			40,659
Total	$	39,177,513		$	2,489,847	$	34,287,107		$	2,400,559
Liabilities:
Interest sensitive contract liabilities – embedded derivatives	$	1,014,228		$	—	$	—		$	1,014,228
Other liabilities:
Derivatives:
Interest rate swaps	14,311			—		14,311			—
Foreign currency forwards	7,213			—		7,213			—
CPI swaps	1,939			—		1,939			—
Credit default swaps	(760		)	—		(760		)	—
Equity options	(6,339		)	—		(6,339		)	—
Foreign currency swaps	6,194			—		6,194			—
Mortality swaps	1,683			—		—			1,683
Total	$	1,038,469		$	—	$	22,558		$	1,015,911

30

Transfers between Levels 1 and 2

Transfers between Levels 1 and 2 are made to reflect changes in observability of inputs and market activity. There were no transfers between Level 1 and Level 2 for the nine months ended September 30, 2018. The Company recognizes transfers of assets and liabilities into and out of levels within the fair value hierarchy at the beginning of the quarter in which the actual event or change in circumstances that caused the transfer occurs. The following tables present the transfers between Level 1 and Level 2 during the three and nine months ended September 30, 2017 (dollars in thousands):

	2017
	Transfers from     Level 1 to Level 2		Transfers from     Level 2 to Level 1
Three months ended September 30:
Fixed maturity securities - available-for-sale:
Corporate securities	$	—	$	—
Nine months ended September 30:
Fixed maturity securities - available-for-sale:
Corporate securities	$	—	$	88,674

31

Quantitative Information Regarding Internally - Priced Level 3 Assets and Liabilities

The following table presents quantitative information about significant unobservable inputs used in Level 3 fair value measurements that are developed internally by the Company as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	Estimated Fair Value				Valuation Technique	Unobservable Inputs	Range (Weighted Average)
	September 30, 2018		December 31, 2017				September 30, 2018		December 31, 2017
Assets:
Corporate	$	630,328	$	173,579	Market comparable securities	Liquidity premium	0-5% (1%)		0-2%  (1%)
						EBITDA Multiple	5.9x-7.5x (6.9x)		—
ABS	64,475		—		Market comparable securities	Liquidity premium	0-1% (1%)		—
U.S. government	20,252		22,511		Market comparable securities	Liquidity premium	0-1% (1%)		0-1%  (1%)
State and political subdivisions	—		4,616		Market comparable securities	Liquidity premium	—		1	%
Other foreign government	5,012		—		Market comparable securities	Liquidity premium	1	%	—
Equity securities	33,074		—		Market comparable securities	Liquidity premium	4	%	—
						EBITDA Multiple	6.9x-12.3x (7.9x)		—
					Discounted cash flow	Discount rate	20	%
Funds withheld at interest- embedded derivatives	142,529		122,194		Total return swap	Mortality	0-100%  (2%)		0-100%  (2%)
						Lapse	0-35%  (9%)		0-35%  (9%)
						Withdrawal	0-5%  (3%)		0-5%  (3%)
						CVA	0-5%  (1%)		0-5%  (1%)
						Crediting rate	2-4%  (2%)		2-4%  (2%)
Longevity swaps	46,090		40,659		Discounted cash flow	Mortality	0-100%  (2%)		0-100%  (2%)
						Mortality improvement	(10%)-10%  (3%)		(10%)-10%  (3%)
Liabilities:
Interest sensitive contract liabilities- embedded derivatives- indexed annuities	815,970		861,758		Discounted cash flow	Mortality	0-100% (2%)		0-100% (2%)
						Lapse	0-35% (9%)		0-35% (9%)
						Withdrawal	0-5% (3%)		0-5% (3%)
						Option budget projection	2-4% (2%)		2-4% (2%)
Interest sensitive contract liabilities- embedded derivatives- variable annuities	90,229		152,470		Discounted cash  flow	Mortality	0-100% (1%)		0-100% (1%)
						Lapse	0-25% (5%)		0-25% (5%)
						Withdrawal	0-7% (4%)		0-7% (3%)
						CVA	0-5% (1%)		0-5% (1%)
						Long-term volatility	0-27% (13%)		0-27% (8%)
Mortality swaps	308		1,683		Discounted cash flow	Mortality	0-100%  (1%)		0-100%  (1%)

32

Changes in Level 3 Assets and Liabilities

Assets and liabilities transferred into Level 3 are due to a lack of observable market transactions and price information. Assets and liabilities are transferred out of Level 3 when circumstances change such that significant inputs can be corroborated with market observable data. This may be due to a significant increase in market activity for the asset or liability, a specific event, one or more significant input(s) becoming observable. Transfers out of Level 3 were primarily the result of the Company obtaining observable pricing information or a third party pricing quotation that appropriately reflects the fair value of those assets and liabilities. The Company also transferred equity securities with a fair value of approximately $38.9 million into Level 3 as a result of the adoption of the new accounting guidance for the recognition and measurement of equity securities.

For further information on the Company’s valuation processes, see Note 6 in the Notes to Consolidated Financial Statements included in the Company’s 2017 Annual Report.

The reconciliations for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) are as follows (dollars in thousands):

For the three months ended September 30, 2018:	Fixed maturity securities - available-for-sale
	Corporate			Canadian government			RMBS			ABS
Fair value, beginning of period	$	1,367,154		$	572,698		$	54,839		$	70,686
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	(156		)	3,520			3			20
Investment related gains (losses), net	239			—			—			626
Included in other comprehensive income	(4,858		)	(27,476		)	(1		)	(130		)
Purchases(1)	123,808			—			—			11,099
Sales(1)	(62,047		)	—			—			(462		)
Settlements(1)	(101,868		)	—			(3		)	(24,166		)
Transfers into Level 3	2,782			—			—			64,009
Transfers out of Level 3	(69,119		)	—			(54,838		)	(38,915		)
Fair value, end of period	$	1,255,935		$	548,742		$	—		$	82,767
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	(180	)	$	3,520		$	—		$	13
Investment related gains (losses), net	(1,430		)	—			—			—

For the three months ended September 30, 2018 (continued):	Fixed maturity securities available-for-sale
	CMBS			U.S. government			State and political subdivisions			Other foreign government
Fair value, beginning of period	$	1,867		$	20,735		$	16,505		$	5,044
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	—			(107		)	6			—
Included in other comprehensive income	7			(122		)	(544		)	(32		)
Purchases(1)	—			120			—			—
Settlements(1)	(1		)	(374		)	(37		)	—
Transfers into Level 3	1,752			—			9,859			—
Transfers out of Level 3	(1,843		)	—			(12,144		)	—
Fair value, end of period	$	1,782		$	20,252		$	13,645		$	5,012
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	—		$	(107	)	$	6		$	—

33

For the three months ended September 30, 2018 (continued):	Equity securities			Funds withheld at interest- embedded derivatives			Short-term Investments			Other assets - longevity swaps			Interest sensitive contract liabilities embedded derivatives			Other liabilities - mortality swaps
Fair value, beginning of period	$	42,937		$	144,610		$	3,217		$	43,971		$	(928,797	)	$	(782	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment related gains (losses), net	5,532			(2,081		)	—			—			32,133			—
Interest credited	—			—			—			—			(25,348		)	—
Included in other comprehensive income	—			—			47			(307		)	—			1
Other revenues	—			—			—			2,426			—			473
Purchases(1)	863			—			1,721			—			(4,231		)	—
Sales(1)	(5,847		)	—			—			—			—			—
Settlements(1)	—			—			—			—			20,044			—
Transfers out of Level 3	—			—			(2,782		)	—			—			—
Fair value, end of period	$	43,485		$	142,529		$	2,203		$	46,090		$	(906,199	)	$	(308	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment related gains (losses), net	$	2,178		$	(2,081	)	$	—		$	—		$	30,433		$	—
Other revenues	—			—			—			2,426			—			473
Interest credited	—			—			—			—			(45,393		)	—

For the nine months ended September 30, 2018:	Fixed maturity securities - available-for-sale
	Corporate			Canadian government			RMBS			ABS
Fair value, beginning of period	$	1,337,272		$	593,942		$	107,882		$	123,474
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	(822		)	10,432			(132		)	202
Investment related gains (losses), net	(2,902		)	—			312			1,910
Included in other comprehensive income	(35,532		)	(55,632		)	(1,782		)	(821		)
Purchases(1)	379,476			—			45,328			22,099
Sales(1)	(79,316		)	—			(4,961		)	(462		)
Settlements(1)	(245,342		)	—			(4,538		)	(46,449		)
Transfers into Level 3	9,948			—			3,031			68,977
Transfers out of Level 3	(106,847		)	—			(145,140		)	(86,163		)
Fair value, end of period	$	1,255,935		$	548,742		$	—		$	82,767
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	(845	)	$	10,432		$	—		$	187
Investment related gains (losses), net	(4,571		)	—			—			—

For the nine months ended September 30, 2018 (continued):	Fixed maturity securities available-for-sale
	CMBS			U.S. government			State and political subdivisions			Other foreign government
Fair value, beginning of period	$	3,234		$	22,511		$	41,203		$	5,092
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	—			(324		)	4			—
Included in other comprehensive income	(56		)	(635		)	46			(80		)
Purchases(1)	—			334			—			—
Settlements(1)	(4		)	(1,634		)	(158		)	—
Transfers into Level 3	1,752			—			9,859			—
Transfers out of Level 3	(3,144		)	—			(37,309		)	—
Fair value, end of period	$	1,782		$	20,252		$	13,645		$	5,012
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	—		$	(325	)	$	3		$	—

34

For the nine months ended September 30, 2018 (continued):	Equity securities			Funds withheld at interest- embedded derivatives		Short-term Investments			Other assets - longevity swaps			Interest sensitive contract liabilities embedded derivatives			Other liabilities - mortality swaps
Fair value, beginning of period	$	—		$	122,194	$	3,096		$	40,659		$	(1,014,228	)	$	(1,683	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment related gains (losses), net	(2,067		)	20,335		—			—			62,242			—
Interest credited	—			—		—			—			6,523			—
Included in other comprehensive income	—			—		1			(1,552		)	—			1
Other revenues	—			—		—			6,983			—			(326		)
Purchases(1)	13,111			—		2,202			—			(16,946		)	—
Sales(1)	(6,416		)	—		—			—			—			—
Settlements(1)	(48		)	—		(314		)	—			56,210			1,700
Transfers into Level 3	38,905			—		—			—			—			—
Transfers out of Level 3	—			—		(2,782		)	—			—			—
Fair value, end of period	$	43,485		$	142,529	$	2,203		$	46,090		$	(906,199	)	$	(308	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment related gains (losses), net	$	(5,527	)	$	20,335	$	—		$	—		$	56,808		$	—
Other revenues	—			—		—			6,983			—			(326		)
Interest credited	—			—		—			—			(49,688		)	—

For the three months ended September 30, 2017:	Fixed maturity securities - available-for-sale
	Corporate			Canadian government			RMBS			ABS
Fair value, beginning of period	$	1,291,054		$	533,270		$	148,685		$	201,589
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	(383		)	3,460			(30		)	160
Investment related gains (losses), net	396			—			44			—
Included in other comprehensive income	(2,700		)	(11,365		)	104			(101		)
Purchases(1)	107,670			—			26,765			—
Sales(1)	(26,337		)	—			(3,553		)	—
Settlements(1)	(88,551		)	—			(3,645		)	(15,243		)
Transfers into Level 3	3,844			—			15			36,994
Transfers out of Level 3	(12,973		)	—			(50,390		)	(78,202		)
Fair value, end of period	$	1,272,020		$	525,365		$	117,995		$	145,197
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	(394	)	$	3,460		$	(27	)	$	156

35

For the three months ended September 30, 2017 (continued):	Fixed maturity securities available-for-sale
	CMBS			U.S. government			State and political subdivisions			Other foreign government
Fair value, beginning of period	$	1,943		$	23,567		$	34,434		$	11,994
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	—			(116		)	26			(1		)
Included in other comprehensive income	5			6			(208		)	(7		)
Purchases(1)	—			134			—			495
Settlements(1)	(1		)	(340		)	(35		)	—
Transfers into Level 3	—			—			7,295			—
Transfers out of Level 3	—			—			—			(6,853		)
Fair value, end of period	$	1,947		$	23,251		$	41,512		$	5,628
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	—		$	(116	)	$	26		$	(1	)

For the three months ended September 30, 2017 (continued):	Short-term Investments			Funds withheld at interest- embedded derivatives		Other assets - longevity swaps		Interest sensitive contract liabilities embedded derivatives			Other liabilities - mortality swaps
Fair value, beginning of period	$	3,548		$	61,281	$	33,349	$	(974,631	)	$	(1,552	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment related gains (losses), net	—			23,044		—		(10,047		)	—
Interest credited	—			—		—		(8,335		)	—
Included in other comprehensive income	(3		)	—		1,144		—			1
Other revenues	—			—		3,334		—			(132		)
Purchases(1)	3,164			—		—		(18,736		)	—
Settlements(1)	(114		)	—		—		21,809			—
Transfers out of Level 3	(3,236		)	—		—		—			—
Fair value, end of period	$	3,359		$	84,325	$	37,827	$	(989,940	)	$	(1,683	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment related gains (losses), net	$	—		$	23,044	$	—	$	(11,900	)	$	—
Other revenues	—			—		3,334		—			(132		)
Interest credited	—			—		—		(30,145		)	—

For the nine months ended September 30, 2017:	Fixed maturity securities - available-for-sale
	Corporate			Canadian government		RMBS			ABS
Fair value, beginning of period	$	1,272,253		$	475,965	$	160,291		$	219,280
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	(1,202		)	9,731		(304		)	1,689
Investment related gains (losses), net	7,592			—		524			—
Included in other comprehensive income	(2,300		)	39,669		2,716			6,802
Purchases(1)	257,671			—		72,582			45,215
Sales(1)	(49,511		)	—		(18,624		)	—
Settlements(1)	(234,552		)	—		(15,084		)	(60,966		)
Transfers into Level 3	35,042			—		5,515			75,752
Transfers out of Level 3	(12,973		)	—		(89,621		)	(142,575		)
Fair value, end of period	$	1,272,020		$	525,365	$	117,995		$	145,197
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	(1,213	)	$	9,731	$	(155	)	$	556
Investment related gains (losses), net	(2,788		)	—		(346		)	—

36

For the nine months ended September 30, 2017 (continued):	Fixed maturity securities available-for-sale
	CMBS			U.S. government			State and political subdivisions			Other foreign government
Fair value, beginning of period	$	21,145		$	24,488		$	41,666		$	12,869
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	709			(348		)	(68		)	(1		)
Investment related gains (losses), net	(595		)	—			—			—
Included in other comprehensive income	(57		)	269			(228		)	(210		)
Purchases(1)	—			370			—			495
Sales(1)	(3,720		)	—			—			—
Settlements(1)	(5,403		)	(1,528		)	(309		)	(672		)
Transfers into Level 3	—			—			7,295			—
Transfers out of Level 3	(10,132		)	—			(6,844		)	(6,853		)
Fair value, end of period	$	1,947		$	23,251		$	41,512		$	5,628
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	—		$	(348	)	$	(68	)	$	(1	)

For the nine months ended September 30, 2017 (continued):	Short-term Investments			Funds withheld at interest- embedded derivatives			Other assets - longevity swaps		Interest sensitive contract liabilities embedded derivatives			Other liabilities - mortality swaps
Fair value, beginning of period	$	3,346		$	(22,529	)	$	26,958	$	(990,308	)	$	(2,462	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment related gains (losses), net	—			106,854			—		9,005			—
Interest credited	—			—			—		(20,408		)	—
Included in other comprehensive income	1			—			3,689		—			1
Other revenues	—			—			7,180		—			(922		)
Purchases(1)	3,520			—			—		(51,276		)	—
Settlements(1)	(272		)	—			—		63,047			1,700
Transfers out of Level 3	(3,236		)	—			—		—			—
Fair value, end of period	$	3,359		$	84,325		$	37,827	$	(989,940	)	$	(1,683	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment related gains (losses), net	$	—		$	106,854		$	—	$	2,934		$	—
Other revenues	—			—			7,180		—			(922		)
Interest credited	—			—			—		(83,456		)	—

(1) The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.

37

Nonrecurring Fair Value Measurements

The following table presents information for assets measured at an estimated fair value on a nonrecurring basis during the periods presented and and still held at the reporting date (for example, when there is evidence of impairment). The estimated fair values for these assets were determined using significant unobservable inputs (Level 3).

	Carrying Value After Measurement				Net Investment Gains (Losses)
	At September 30,				Three months ended September 30,						Nine months ended September 30,
(dollars in thousands)	2018		2017		2018			2017			2018			2017
Limited partnership interests(1)	$	2,246	$	4,656	$	(1,860	)	$	(896	)	$	(1,860	)	$	(7,204	)
Private equities(2)	—		106		—			(531		)	—			(531		)

(1) The impaired limited partnership interests presented above were accounted for using the cost method. Impairments on these cost method investments were recognized at estimated fair value determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. The market for these investments has limited activity and price transparency.

(2) The fair value of the Company’s private equity investments is based on external valuation models.

Fair Value of Financial Instruments

The Company is required by general accounting principles for Fair Value Measurements and Disclosures to disclose the fair value of certain financial instruments including those that are not carried at fair value. The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments, which were not measured at fair value on a recurring basis, as of September 30, 2018 and December 31, 2017 (dollars in thousands). For additional information regarding the methods and significant assumptions used by the Company to estimate these fair values, see Note 6 in the Notes to Consolidated Financial Statements included in the Company’s 2017 Annual Report. This table excludes any payables or receivables for collateral under repurchase agreements and other transactions. The estimated fair value of the excluded amount approximates carrying value as they equal the amount of cash collateral received/paid.

September 30, 2018:	Carrying Value (1)		Estimated  Fair Value		Fair Value Measurement Using:
					Level 1		Level 2		Level 3		NAV
Assets:
Mortgage loans on real estate	$	4,779,074	$	4,652,481	$	—	$	—	$	4,652,481	$	—
Policy loans	1,320,050		1,320,050		—		1,320,050		—		—
Funds withheld at interest	5,833,925		6,040,671		—		—		6,040,671		—
Cash and cash equivalents	1,073,209		1,073,209		1,073,209		—		—		—
Short-term investments	43,877		43,877		43,877		—		—		—
Other invested assets	842,626		839,280		5,618		71,401		382,284		379,977
Accrued investment income	455,296		455,296		—		455,296		—		—
Liabilities:
Interest-sensitive contract liabilities	$	13,319,348	$	13,113,427	$	—	$	—	$	13,113,427	$	—
Long-term debt	2,787,975		2,850,344		—		—		2,850,344		—
Collateral finance and securitization notes	710,792		652,380		—		—		652,380		—
December 31, 2017:	Carrying Value (1)		Estimated Fair Value		Fair Value Measurement Using:
					Level 1		Level 2		Level 3		NAV
Assets:
Mortgage loans on real estate	$	4,400,533	$	4,477,654	$	—	$	—	$	4,477,654	$	—
Policy loans	1,357,624		1,357,624		—		1,357,624		—		—
Funds withheld at interest	5,955,092		6,275,623		—		—		6,275,623		—
Cash and cash equivalents	946,736		946,736		946,736		—		—		—
Short-term investments	42,558		42,558		42,558		—		—		—
Other invested assets	651,792		679,377		28,540		67,778		247,934		335,125
Accrued investment income	392,721		392,721		—		392,721		—		—
Liabilities:
Interest-sensitive contract liabilities	$	12,683,872	$	12,917,243	$	—	$	—	$	12,917,243	$	—
Long-term debt	2,788,365		2,959,912		—		—		2,959,912		—
Collateral finance and securitization notes	783,938		722,145		—		—		722,145		—

(1) Carrying values presented herein may differ from those in the Company’s condensed consolidated balance sheets because certain items within the respective financial statement captions may be measured at fair value on a recurring basis.

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7. Segment Information

The accounting policies of the segments are the same as those described in the Summary of Significant Accounting Policies in Note 2 of the consolidated financial statements accompanying the 2017 Annual Report. The Company measures segment performance primarily based on profit or loss from operations before income taxes. There are no intersegment reinsurance transactions and the Company does not have any material long-lived assets.

The Company allocates capital to its segments based on an internally developed economic capital model, the purpose of which is to measure the risk in the business and to provide a basis upon which capital is deployed. The economic capital model considers the unique and specific nature of the risks inherent in the Company’s businesses. As a result of the economic capital allocation process, a portion of investment income is attributed to the segments based on the level of allocated capital. In addition, the segments are charged for excess capital utilized above the allocated economic capital basis. This charge is included in policy acquisition costs and other insurance expenses.

The Company has geographic-based and business-based operational segments. Geographic-based operations are further segmented into traditional and financial solutions businesses. Information related to revenues, income (loss) before income taxes and total assets of the Company for each reportable segment are summarized below (dollars in thousands).

	Three months ended September 30,				Nine months ended September 30,
Revenues:	2018		2017		2018		2017
U.S. and Latin America:
Traditional	$	1,547,790	$	1,521,383	$	4,601,631	$	4,532,584
Financial Solutions	290,848		264,170		734,148		834,992
Total	1,838,638		1,785,553		5,335,779		5,367,576
Canada:
Traditional	295,962		281,095		910,480		814,643
Financial Solutions	12,168		12,430		37,034		36,240
Total	308,130		293,525		947,514		850,883
Europe, Middle East and Africa:
Traditional	357,059		360,972		1,123,379		1,024,978
Financial Solutions	91,664		77,041		280,482		230,435
Total	448,723		438,013		1,403,861		1,255,413
Asia Pacific:
Traditional	578,035		561,660		1,763,094		1,628,419
Financial Solutions	16,167		16,932		54,005		55,368
Total	594,202		578,592		1,817,099		1,683,787
Corporate and Other	37,838		49,627		92,893		125,667
Total	$	3,227,531	$	3,145,310	$	9,597,146	$	9,283,326

	Three months ended September 30,						Nine months ended September 30,
Income (loss) before income taxes:	2018			2017			2018			2017
U.S. and Latin America:
Traditional	$	116,328		$	160,512		$	191,198		$	281,066
Financial Solutions	87,073			89,118			236,882			299,689
Total	203,401			249,630			428,080			580,755
Canada:
Traditional	21,149			28,789			66,661			80,953
Financial Solutions	1,646			4,472			8,381			12,489
Total	22,795			33,261			75,042			93,442
Europe, Middle East and Africa:
Traditional	18,370			15,421			40,259			40,751
Financial Solutions	56,205			30,953			160,738			91,776
Total	74,575			46,374			200,997			132,527
Asia Pacific:
Traditional	62,007			26,564			143,756			121,574
Financial Solutions	206			(229		)	8,365			11,020
Total	62,213			26,335			152,121			132,594
Corporate and Other	(40,323		)	(15,438		)	(148,366		)	(51,997		)
Total	$	322,661		$	340,162		$	707,874		$	887,321

39

Assets:	September 30, 2018		December 31, 2017
U.S. and Latin America:
Traditional	$	19,148,790	$	18,603,423
Financial Solutions	19,251,832		15,959,206
Total	38,400,622		34,562,629
Canada:
Traditional	4,210,051		4,161,452
Financial Solutions	146,374		126,372
Total	4,356,425		4,287,824
Europe, Middle East and Africa:
Traditional	3,573,449		3,099,495
Financial Solutions	4,585,297		5,274,993
Total	8,158,746		8,374,488
Asia Pacific:
Traditional	5,312,822		4,915,442
Financial Solutions	1,181,954		1,198,585
Total	6,494,776		6,114,027
Corporate and Other	5,562,073		7,175,850
Total	$	62,972,642	$	60,514,818

8.    Commitments, Contingencies and Guarantees

Commitments

Funding of Investments

The Company’s commitments to fund investments as of September 30, 2018 and December 31, 2017 are presented in the following table (dollars in thousands):

	September 30, 2018		December 31, 2017
Limited partnership interests and joint ventures	$	578,944	$	485,197
Commercial mortgage loans	120,571		40,815
Bank loans and private placements	101,992		60,472
Equity release mortgages	213,459		153,937

The Company anticipates that the majority of its current commitments will be invested over the next five years; however, these commitments could become due any time at the request of the counterparties. Bank loans and private placements are included in fixed maturity securities available-for-sale.

Contingencies

Litigation

The Company is subject to litigation in the normal course of its business. The Company currently has no material litigation. A legal reserve is established when the Company is notified of an arbitration demand or litigation or is notified that an arbitration demand or litigation is imminent, it is probable that the Company will incur a loss as a result and the amount of the probable loss is reasonably capable of being estimated.

Other Contingencies

The Company indemnifies its directors and officers as provided in its charters and by-laws. Since this indemnity generally is not subject to limitation with respect to duration or amount, the Company does not believe that it is possible to determine the maximum potential amount due under this indemnity in the future.

Guarantees

Statutory Reserve Support

RGA, through wholly-owned subsidiaries, has committed to provide statutory reserve support to third parties, in exchange for a fee, by funding loans if certain defined events occur. Such statutory reserves are required under the U.S. Valuation of Life Policies Model Regulation (commonly referred to as Regulation XXX for term life insurance policies and Regulation A-XXX for universal life secondary guarantees). The third parties have recourse to RGA should the subsidiary fail to provide the required funding, however, as of September 30, 2018, the Company does not believe that it will be required to provide any funding under these commitments as the occurrence of the defined events is considered remote. The following table presents the maximum potential obligation for these commitments as of September 30, 2018 (dollars in millions):

40

Commitment Period:	Maximum Potential Obligation
2023	$	500.0
2033	450.0
2034	2,000.0
2035	1,314.2
2036	1,932.0
2037	6,750.0
2038	800.0

Other Guarantees

RGA has issued guarantees to third parties on behalf of its subsidiaries for the payment of amounts due under certain securities borrowing and repurchase arrangements, financing arrangements and office lease obligations, whereby, if a subsidiary fails to meet an obligation, RGA or one of its other subsidiaries will make a payment to fulfill the obligation. Additionally, in limited circumstances, treaty guarantees are granted to ceding companies in order to provide them additional security, particularly in cases where RGA’s subsidiary is relatively new, unrated, or not of a significant size, relative to the ceding company. Liabilities supported by the treaty guarantees, before consideration for any legally offsetting amounts due from the guaranteed party are reflected on the Company’s condensed consolidated balance sheets in future policy benefits. Potential guaranteed amounts of future payments will vary depending on production levels and underwriting results. Guarantees related to securities borrowing and repurchase arrangements provide additional security to third parties should a subsidiary fail to provide securities when due. RGA’s guarantees issued as of September 30, 2018 and December 31, 2017 are reflected in the following table (dollars in thousands):

	September 30, 2018		December 31, 2017
Treaty guarantees	$	1,073,184	$	1,047,449
Treaty guarantees, net of assets in trust	966,099		926,393
Securities borrowing and repurchase arrangements	276,190		294,325
Financing arrangements	69,221		86,183
Lease obligations	881		1,662

9. Income Tax

The Company's effective tax rates differed from the applicable U.S. federal income tax statutory rates of 21% and 35% as a result of the following for the three and nine months ended September 30, 2018 and 2017, respectively (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Tax provision at U.S. statutory rate	$	67,759		$	119,057		$	148,654		$	310,562
Increase (decrease) in income taxes resulting from:
U.S. Tax Reform provisional adjustments	664			—			(2,685		)	—
U.S. Tax Reform valuation allowance adjustments	(58,949		)	—			(59,139		)	—
Foreign tax rate differing from U.S. tax rate	7,537			(3,635		)	8,795			(14,049		)
Differences in tax bases in foreign jurisdictions	(2,371		)	2,126			(9,264		)	(14,633		)
Deferred tax valuation allowance	(5,334		)	(2,501		)	5,357			11,627
Amounts related to tax audit contingencies	1,851			299			650			(873		)
Corporate rate changes	(166		)	(1,139		)	30			(2,332		)
Subpart F	(99		)	64			211			1,390
Foreign tax credits	(544		)	1,230			(1,003		)	(834		)
Global intangible low-taxed income, net of credit	7,624			—			11,916			—
Equity compensation excess benefit	(817		)	(2,762		)	(5,067		)	(7,226		)
Return to provision adjustments	4,213			452			4,108			133
Other, net	94			(620		)	(492		)	(1,737		)
Total provision for income taxes	$	21,462		$	112,571		$	102,071		$	282,028
Effective tax rate	6.7		%	33.1		%	14.4		%	31.8		%

On December 22, 2017, the Tax Cuts and Jobs Act of 2017 (“U.S. Tax Reform”) was signed into law. U.S. Tax Reform makes broad and complex changes to the U.S. tax code, including but not limited to, (1) reducing the U.S. federal corporate tax rate from

41

35% to 21%; (2) requiring companies to pay a one-time transition tax on certain unrepatriated earnings of foreign subsidiaries; (3) generally eliminating U.S. federal income taxes on dividends from foreign subsidiaries; (4) eliminating the corporate alternative minimum tax (“AMT”) and changing how existing AMT credits can be realized; (5) creating the base erosion anti-abuse tax (“BEAT”); (6) establishing a new provision designed to tax global intangible low-taxed income (“GILTI”), which allows for the possibility of using foreign tax credits and a deduction of up to 50 percent to offset the income tax liability (subject to some limitations); and (7) changing rules related to uses and limitations of net operating loss carryforwards created in tax years beginning after December 31, 2017.

The SEC issued Staff Accounting Bulletin 118 (“SAB 118”), which provides guidance on accounting for the tax effects of U.S. Tax Reform. SAB 118 provides a measurement period that should not extend beyond one year from U.S. Tax Reform enactment date for companies to complete the accounting under Accounting Standards Codification 740 (“ASC 740”). In accordance with SAB 118, a company must reflect the income tax effects of those aspects of U.S. Tax Reform for which the accounting under ASC 740 is complete. To the extent that a company’s accounting for certain income tax effects of U.S. Tax Reform is incomplete but it is able to determine a reasonable estimate, it must record a provisional estimate in the financial statements. If a company cannot determine a provisional estimate to be included in the financial statements, it should continue to apply ASC 740 on the basis of the provisions of the tax laws that were in effect immediately before the enactment of U.S. Tax Reform.

The Company calculated a provisional estimate of the impact of U.S. Tax Reform for its 2017 financial statements. As of September 30, 2018, the Company has finalized certain aspects of U.S. Tax Reform including computing the pretax deferred tax items upon which the change in tax rate was applied, the one-time transition tax on unrepatriated earnings of foreign subsidiaries and the adoption of Accounting Standards Update 2018-02 (“ASU 2018-02”). The Company has refined provisional estimates related to excessive employee remuneration, which may be further refined during the fourth quarter. The Company also continues to monitor the issuance of new guidance in the form of Treasury Regulations or Notices which could impact the provisional balances recorded as of December 31, 2017. In addition to the amounts in the table above, the Company recorded an additional adjustment in the third quarter of 2018 related to ASU 2018-02, decreasing accumulated other comprehensive income and increasing retained earnings by approximately $2.6 million.

The Company provisionally estimated there would be no one-time transition tax on unrepatriated earnings of foreign subsidiaries. Upon review of the Proposed Treasury Regulations issued during the quarter and completion of the accumulated and current earnings and profits calculations of the Company’s foreign subsidiaries, no adjustment to the provisional estimate of the transition tax on unrepatriated earnings is necessary.

Companies subject to GILTI have the option to account for the GILTI tax as a period cost if and when incurred, or to recognize deferred taxes for temporary differences including outside basis differences expected to reverse as GILTI. The Company has not yet made a policy election to account for GILTI but included an estimate of the current GILTI impact in the tax provision. The Company continues to gather information and monitor guidance that may change the Company’s interpretation of the law and hence may result in a refinement to the calculation and changes to this amount.

The Company continues to evaluate the effects of the BEAT and is currently restructuring existing business flows to reduce the risk that the Company will be subject to the BEAT for 2018. The Company has estimated that the annual deductible payments to foreign affiliates as a percentage of annual estimated total deductions to be below the base erosion percentage threshold for application of the BEAT; therefore, the Company has not established an additional BEAT liability as of September 30, 2018. The Company continues to gather information and monitor guidance that may change the Company’s interpretation of the law and hence may result in a refinement to the calculation and changes to this amount.

The effective tax rate for the third quarter and first nine months of 2018 were lower than the U.S. Statutory rate of 21.0% primarily as a result of the release of a valuation allowance on foreign tax credits, which was partially offset by income earned in jurisdictions with statutory rates higher than the U.S. tax rate and tax expense related to GILTI. During the third quarter the Company released an uncertain tax position due to the expiration of the statute of limitations and established a new position. The foreign tax credits were used to offset the new uncertain tax liability, resulting in a valuation allowance no longer being necessary. $58.9 million of the release of the valuation allowance was previously established as part of U.S. Tax Reform. The effective tax rates for the third quarter and first nine months of 2017 were lower than the U.S. Statutory rate of 35% primarily as a result of income generated in non-U.S. jurisdictions with lower tax rates than the U.S. The first nine months of 2017 also included a reduction related to differences in tax bases in foreign jurisdictions and a tax benefit from the filing of amended returns, which was partially offset with a valuation allowance established related to amended return filings.

42

10.    Employee Benefit Plans

The components of net periodic benefit costs, included in other operating expenses on the condensed consolidated statements of income, for the three and nine months ended September 30, 2018 and 2017 were as follows (dollars in thousands):

	Pension Benefits						Other Benefits
	Three months ended September 30,						Three months ended September 30,
	2018			2017			2018			2017
Service cost	$	3,106		$	2,699		$	999		$	465
Interest cost	1,341			1,314			680			459
Expected return on plan assets	(1,884		)	(1,554		)	—			—
Amortization of prior service cost (credit)	82			85			(328		)	(675		)
Amortization of prior actuarial losses	929			1,081			937			580
Settlements	—			256			—			—
Net periodic benefit cost	$	3,574		$	3,881		$	2,288		$	829

	Pension Benefits						Other Benefits
	Nine months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Service cost	$	9,330		$	8,098		$	2,271		$	1,907
Interest cost	4,028			3,943			1,739			1,589
Expected return on plan assets	(5,651		)	(4,662		)	—			—
Amortization of prior service cost (credit)	247			254			(986		)	(986		)
Amortization of prior actuarial losses	2,792			3,244			1,933			1,494
Settlements	—			769			—			—
Net periodic benefit cost	$	10,746		$	11,646		$	4,957		$	4,004

11. Reinsurance

Retrocession reinsurance treaties do not relieve the Company from its obligations to direct writing companies. Failure of retrocessionaires to honor their obligations could result in losses to the Company. Consequently, allowances would be established for amounts deemed uncollectible. At September 30, 2018 and December 31, 2017, no allowances were deemed necessary. The Company regularly evaluates the financial condition of the insurance companies from which it assumes and to which it cedes reinsurance.

Retrocessions are arranged through the Company’s retrocession pools for amounts in excess of the Company’s retention limit. As of September 30, 2018 and December 31, 2017, all rated retrocession pool participants followed by the A.M. Best Company were rated “A- (excellent)” or better, except for one pool member that was rated “B++”. The Company verifies retrocession pool participants’ ratings on a quarterly basis. For a majority of the retrocessionaires that were not rated, security in the form of letters of credit or trust assets has been posted. In addition, the Company performs annual financial reviews of its retrocessionaires to evaluate financial stability and performance. In addition to its third party retrocessionaires, various RGA reinsurance subsidiaries retrocede amounts in excess of their retention limits to affiliated subsidiaries.

The following table presents information for the Company’s reinsurance ceded receivable assets, including the respective amount and A.M. Best rating for each reinsurer representing in excess of five percent of the total as of September 30, 2018 or December 31, 2017 (dollars in thousands):

		September 30, 2018				December 31, 2017
Reinsurer	A.M. Best Rating	Amount		% of Total		Amount		% of Total
Reinsurer A	A+	$	303,942	39.5		$	301,478	38.6	%
Reinsurer B	A+	203,702		26.5		203,898		26.1
Reinsurer C	A	67,599		8.8		67,723		8.7
Reinsurer D	A+	41,049		5.3		40,528		5.2
Reinsurer E	A++	35,090		4.6		40,592		5.2
Other reinsurers		117,942		15.3		127,808		16.2
Total		$	769,324	100.0	%	$	782,027	100.0	%

Included in the total reinsurance ceded receivables balance were $269.1 million and $243.8 million of claims recoverable, of which $6.7 million and $1.9 million were in excess of 90 days past due, as of September 30, 2018 and December 31, 2017, respectively.

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12. Financing Activities

On August 21, 2018 the Company entered into a new syndicated revolving credit facility with a five year term and an overall capacity of $850.0 million, replacing its existing $850.0 million syndicated revolving credit facility, which was scheduled to mature in September 2019. The Company may borrow cash and may obtain letters of credit in multiple currencies under this facility.

13. New Accounting Standards

Changes to the general accounting principles are established by the Financial Accounting Standards Board (“FASB”) in the form of accounting standards updates to the FASB Accounting Standards Codification™. Accounting standards updates not listed below were assessed and determined to be either not applicable or are expected to have minimal impact on the Company’s condensed consolidated financial statements.

Description	Date of Adoption	Effect on the financial statements or other significant matters
Standards adopted:
Reporting Comprehensive Income This updated guidance requires reclassification from accumulated other comprehensive income to retained earnings for the stranded tax effects resulting from the newly enacted U.S. federal corporate income tax rate. The amount of the reclassification would be the difference between the historical U.S. federal corporate income tax rate and the newly enacted 21 percent tax rate.	December 31, 2017	The Company adopted the new guidance by reclassifying certain income tax effects of items within accumulated other comprehensive income to retained earnings as a result of the Tax Cuts and Jobs Act of 2017. The impact of adopting this standard was an increase in accumulated other comprehensive income and a reduction in retained earnings of approximately $156.4 million. The adjustments to the Company’s deferred tax liabilities was a provisional amount as defined in the SEC’s SAB 118, issued in December 2017 to address complexities in completing the calculations resulting from the U.S. Tax Cuts and Jobs Act of 2017.  SAB 118 provides guidance on accounting for the effects of the U.S. Tax and Jobs Act of 2017 when the Company’s process is incomplete, and permits a final determination to be made within a measurement period not to exceed one year from the enactment date.   During 2018, the Company continued to evaluate and gather additional information to account for the effects of the Tax Cuts and Jobs Act of 2017, including the preparation of and filing of its U.S. tax returns to more precisely compute the pretax deferred tax items and the impact of adopting the new guidance. As part of this process the Company recorded an additional adjustment in 2018 decreasing accumulated other comprehensive income and increasing retained earnings of approximately $2.6 million.
Stock Compensation This updated guidance requires excess tax benefits and deficiencies from share-based payment awards be recorded in income tax expense in the income statement. Previously, excess tax benefits and deficiencies were recognized in shareholders’ equity or deferred taxes on the balance sheet depending on the tax situation of the Company. In addition, the updated guidance also changes the accounting for forfeitures and statutory tax withholding requirements, as well as the classification in the statement of cash flows.	January 1, 2017	Upon adoption, the Company recognized excess tax benefits of approximately $17.7 million in deferred tax assets that were previously not recognized in a cumulative-effect adjustment increasing retained earnings by $17.7 million. The Company also recorded excess tax benefits of approximately $10.5 million in the provision for income taxes for the year ended December 31, 2017. The number of weighted average diluted shares outstanding were also adjusted to exclude excess tax benefits from the assumed proceeds in the diluted shares calculation resulting in an immaterial increase in the number of dilutive shares outstanding. The Company also elected to continue estimating forfeitures for purposes of recognizing share-based compensation. Other aspects of the adoption of the updated guidance did not have a material impact to the Company’s consolidated financial statements.
Financial Instruments - Recognition and Measurement This guidance requires equity investments that are not accounted for under the equity method of accounting to be measured at fair value with changes recognized in net income and also updates certain presentation and disclosure requirements.	January 1, 2018	This guidance required a cumulative-effect adjustment for certain items upon adoption. The adoption of the new guidance was not material to the Company's consolidated financial statements.

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Standards not yet adopted:
Leases This new standard, based on the principle that entities should recognize assets and liabilities arising from leases, does not significantly change the lessees’ recognition, measurement and presentation of expenses and cash flows from the previous accounting standard. Leases are classified as finance or operating. The new standard’s primary change is the requirement for entities to recognize a lease liability for payments and a right of use asset representing the right to use the leased asset during the term of operating lease arrangements. Lessees are permitted to make an accounting policy election to not recognize the asset and liability for leases with a term of twelve months or less. Lessors’ accounting is largely unchanged from the previous accounting standard. In addition, the new standard expands the disclosure requirements of lease arrangements. Early adoption is permitted.	January 1, 2019	This new standard will be adopted by applying a modified retrospective transition approach, which includes a number of practical expedients. The Company is currently evaluating the impact of this amendment on its consolidated financial statements; however, it does not expect the adoption of the new standard to have a material impact on its results of operations or balance sheet as a result of the recognition of right-to-use assets and lease liabilities related to operating leases. Contractual obligations related to operating leases totaled approximately $38.2 million as of December 31, 2017.
Derivatives and Hedging This updated guidance improves the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements and make certain targeted improvements to simplify the application of the hedge accounting in current GAAP related to the assessment of hedge effectiveness. Early adoption is permitted.	January 1, 2019	This new guidance will be adopted by applying a modified retrospective approach to existing hedging relationships as of the date of adoption. The Company is currently evaluating the impact of this updated guidance on its consolidated financial statements.
Financial Instruments - Credit Losses This guidance adds to U.S. GAAP an impairment model, known as current expected credit loss (“CECL”) model that is based on expected losses rather than incurred losses. For traditional and other receivables, held-to-maturity debt securities, loans and other instruments entities will be required to use the new forward-looking “expected loss” model that generally will result in earlier recognition of allowance for losses. For available-for-sale debt securities with unrealized losses, entities will measure credit losses similar to what they do today, except the losses will be recognized as allowances rather than reduction to the amortized cost of the securities. Early adoption is permitted.	January 1, 2020	This guidance will be adopted through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective (that is, a modified-retrospective approach). The Company is currently evaluating the impact of this amendment on its consolidated financial statements.
Fair Value Measurement This guidance is part of the FASB’s disclosure framework project and eliminates certain disclosure requirements for fair value measurement, requires entities to disclose new information and modifies existing disclosure requirements. Early adoption is permitted.	January 1, 2020	Certain disclosure changes in the new guidance will be applied prospectively in the year of adoption. The remaining changes in the new guidance will be applied retrospectively to all periods presented in the year of adoption. The Company is currently evaluating the impact of this amendment on its consolidated financial statements.
Financial Services - Insurance This guidance significantly changes how insurers account for long-duration insurance contracts. The new guidance will require insurers to review and update, if necessary, the assumptions used to measure insurance liabilities periodically, rather than retain assumptions used at contract inception. The updated guidance also changes the recognition and measurement of deferred acquisition costs (DAC) and created a new category of benefit features called market risk benefits (MRB) that will be measured at fair value. The guidance also significantly expands the disclosure requirements for long-duration contracts.	January 1, 2021	The guidance on measuring the liabilities for future policy benefits and DAC will be adopted on a modified retrospective basis as of the earliest period presented in the year of adoption. The guidance on MRB will be adopted on a retrospective basis as of the earliest period presented in the year of adoption. The Company is currently evaluating the impact of this amendment on its consolidated financial statements but anticipates the updated guidance will likely have a material impact on the measurement and recognition of its long-duration insurance contracts.
Compensation - Retirement Benefits - Defined Benefit Plans - General This guidance is part of the FASB’s disclosure framework project and eliminates certain disclosure requirements for defined benefit pension and other postretirement plans. Early adoption is permitted.	January 1, 2021	This new guidance will be applied retrospectively to all periods presented in the year of adoption. The Company is currently evaluating the impact of this amendment on its consolidated financial statements.

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ITEM 2.        MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Cautionary Note Regarding Forward-Looking Statements

This report contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 including, among others, statements relating to projections of the strategies, earnings, revenues, income or loss, ratios, future financial performance, and growth potential of the Company. The words “intend,” “expect,” “project,” “estimate,” “predict,” “anticipate,” “should,” “believe,” and other similar expressions also are intended to identify forward-looking statements. Forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified. Future events and actual results, performance, and achievements could differ materially from those set forth in, contemplated by, or underlying the forward-looking statements.

Numerous important factors could cause actual results and events to differ materially from those expressed or implied by forward-looking statements including, without limitation, (1) adverse capital and credit market conditions and their impact on the Company’s liquidity, access to capital and cost of capital, (2) the impairment of other financial institutions and its effect on the Company’s business, (3) requirements to post collateral or make payments due to declines in market value of assets subject to the Company’s collateral arrangements, (4) the fact that the determination of allowances and impairments taken on the Company’s investments is highly subjective, (5) adverse changes in mortality, morbidity, lapsation or claims experience, (6) changes in the Company’s financial strength and credit ratings and the effect of such changes on the Company’s future results of operations and financial condition, (7) inadequate risk analysis and underwriting, (8) general economic conditions or a prolonged economic downturn affecting the demand for insurance and reinsurance in the Company’s current and planned markets, (9) the availability and cost of collateral necessary for regulatory reserves and capital, (10) market or economic conditions that adversely affect the value of the Company’s investment securities or result in the impairment of all or a portion of the value of certain of the Company’s investment securities, that in turn could affect regulatory capital, (11) market or economic conditions that adversely affect the Company’s ability to make timely sales of investment securities, (12) risks inherent in the Company’s risk management and investment strategy, including changes in investment portfolio yields due to interest rate or credit quality changes, (13) fluctuations in U.S. or foreign currency exchange rates, interest rates, or securities and real estate markets, (14) adverse litigation or arbitration results, (15) the adequacy of reserves, resources and accurate information relating to settlements, awards and terminated and discontinued lines of business, (16) the stability of and actions by governments and economies in the markets in which the Company operates, including ongoing uncertainties regarding the amount of U.S. sovereign debt and the credit ratings thereof, (17) competitive factors and competitors’ responses to the Company’s initiatives, (18) the success of the Company’s clients, (19) successful execution of the Company’s entry into new markets, (20) successful development and introduction of new products and distribution opportunities, (21) the Company’s ability to successfully integrate acquired blocks of business and entities, (22) action by regulators who have authority over the Company’s reinsurance operations in the jurisdictions in which it operates, (23) the Company’s dependence on third parties, including those insurance companies and reinsurers to which the Company cedes some reinsurance, third-party investment managers and others, (24) the threat of natural disasters, catastrophes, terrorist attacks, epidemics or pandemics anywhere in the world where the Company or its clients do business, (25) interruption or failure of the Company’s telecommunication, information technology or other operational systems, or the Company’s failure to maintain adequate security to protect the confidentiality or privacy of personal or sensitive data stored on such systems, (26) changes in laws, regulations, and accounting standards applicable to the Company, its subsidiaries, or its business, (27) the benefits or burdens associated with the Tax Cuts and Jobs Act of 2017 may be different than expected, (28) the effect of the Company’s status as an insurance holding company and regulatory restrictions on its ability to pay principal of and interest on its debt obligations, and (29) other risks and uncertainties described in this document and in the Company’s other filings with the SEC.

Forward-looking statements should be evaluated together with the many risks and uncertainties that affect the Company’s business, including those mentioned in this document and described in the periodic reports the Company files with the SEC. These forward-looking statements speak only as of the date on which they are made. The Company does not undertake any obligations to update these forward-looking statements, even though the Company’s situation may change in the future. For a discussion of these risks and uncertainties that could cause actual results to differ materially from those contained in the forward-looking statements, you are advised to see Item 1A – “Risk Factors” in the 2017 Annual Report.

Overview

The Company is among the leading global providers of life reinsurance and financial solutions, with $3.3 trillion of life reinsurance in force. Traditional reinsurance includes individual and group life and health, disability, and critical illness reinsurance. Financial solutions includes longevity reinsurance, asset-intensive reinsurance, and financial reinsurance. The Company derives revenues primarily from renewal premiums from existing reinsurance treaties, new business premiums from existing or new reinsurance treaties, fee income from financial solutions business and income earned on invested assets.

Historically, the Company’s primary business has been traditional life reinsurance, which involves reinsuring life insurance policies that are often in force for the remaining lifetime of the underlying individuals insured, with premiums earned typically over a period of 10 to 30 years. Each year, however, a portion of the business under existing treaties terminates due to, among other

46

things, lapses or voluntary surrenders of underlying policies, deaths of insureds, and the exercise of recapture options by ceding companies. The Company has expanded its financial solutions business, including significant asset-intensive and longevity risk transactions, which allow its clients to take advantage of growth opportunities and manage their capital, longevity and investment risk.

The Company’s long-term profitability largely depends on the volume and amount of death- and health-related claims incurred and the ability to adequately price the risks it assumes. While death claims are reasonably predictable over a period of many years, claims become less predictable over shorter periods and are subject to significant fluctuation from quarter to quarter and year to year. Additionally, the Company generates profits on investment spreads associated with the reinsurance of investment type contracts and generates fees from financial reinsurance transactions which are typically shorter duration than its traditional life reinsurance business. The Company believes its sources of liquidity are sufficient to cover potential claims payments on both a short-term and long-term basis.

As is customary in the reinsurance business, clients continually update, refine, and revise reinsurance information provided to the Company. Such revised information is used by the Company in preparation of its condensed consolidated financial statements and the financial effects resulting from the incorporation of revised data are reflected in the current period.

Segment Presentation

The Company has geographic-based and business-based operational segments. Geographic-based operations are further segmented into traditional and financial solutions businesses. The Company allocates capital to its segments based on an internally developed economic capital model, the purpose of which is to measure the risk in the business and to provide a consistent basis upon which capital is deployed. The economic capital model considers the unique and specific nature of the risks inherent in RGA’s businesses.

As a result of the economic capital allocation process, a portion of investment income is credited to the segments based on the level of allocated capital. In addition, the segments are charged for excess capital utilized above the allocated economic capital basis. This charge is included in policy acquisition costs and other insurance expenses. Segment investment performance varies with the composition of investments and the relative allocation of capital to the operating segments.

Segment revenue levels can be significantly influenced by currency fluctuations, large transactions, mix of business and reporting practices of ceding companies, and therefore may fluctuate from period to period. Although reasonably predictable over a period of years, segment claims experience can be volatile over shorter periods. See “Results of Operations by Segment” below for further information about the Company’s segments.

Consolidated Results of Operations

	Three months ended September 30,					Nine months ended September 30,
	2018			2017		2018			2017
Revenues:	(Dollars in thousands, except per share data)
Net premiums	$	2,562,042		$	2,489,797	$	7,739,053		$	7,335,944
Investment income, net of related expenses	572,742			556,918		1,617,132			1,589,820
Investment related gains (losses), net	(20,017		)	22,653		(31,059		)	139,471
Other revenues	112,764			75,942		272,020			218,091
Total revenues	3,227,531			3,145,310		9,597,146			9,283,326
Benefits and Expenses:
Claims and other policy benefits	2,209,920			2,100,680		6,851,614			6,371,188
Interest credited	143,292			126,099		333,068			349,068
Policy acquisition costs and other insurance expenses	310,639			365,424		987,817			1,064,645
Other operating expenses	200,262			168,417		586,495			481,279
Interest expense	33,290			36,836		107,769			108,590
Collateral finance and securitization expense	7,467			7,692		22,509			21,235
Total benefits and expenses	2,904,870			2,805,148		8,889,272			8,396,005
Income before income taxes	322,661			340,162		707,874			887,321
Provision for income taxes	21,462			112,571		102,071			282,028
Net income	$	301,199		$	227,591	$	605,803		$	605,293
Earnings per share:
Basic earnings per share	$	4.76		$	3.53	$	9.47		$	9.39
Diluted earnings per share	$	4.68		$	3.47	$	9.30		$	9.23
Dividends declared per share	$	0.60		$	0.50	$	1.60		$	1.32

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Consolidated income before income taxes decreased $17.5 million, or 5.1%, and $179.4 million, or 20.2%, for the three and nine months ended September 30, 2018, respectively, as compared to the same periods in 2017. The decrease in income for the third quarter of 2018 was primarily due to unfavorable claims experience in the U.S. group business and an increase in operating expenses related to the Company’s strategic initiatives. The third quarter and first nine months also reflect lower variable investment income and unfavorable changes in investment related gains (losses). The unfavorable change in investment related gains (losses) includes changes in the fair value of embedded derivatives on modco or funds withheld treaties within the U.S. segment primarily related to changes in interest rates and credit spreads. The effect of the change in fair value of these embedded derivatives on income is discussed below. Foreign currency fluctuations relative to the prior year decreased in income before income taxes by $1.4 million in the third quarter and increased income by $13.4 million in the first nine months of 2018, as compared to the same periods in 2017.

The Company recognizes in consolidated income, any changes in the fair value of embedded derivatives on modco or funds withheld treaties, equity-indexed annuity treaties (“EIAs”) and variable annuities with guaranteed minimum benefit riders. The Company utilizes freestanding derivatives to minimize the income statement volatility due to changes in the fair value of embedded derivatives associated with guaranteed minimum benefit riders. The following table presents the effect of embedded derivatives and related freestanding derivatives on income before income taxes for the periods indicated (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Modco/Funds withheld:
Unrealized gains (losses)	$	(2,081	)	$	23,044		$	20,335		$	106,854
Deferred acquisition costs/retrocession	51			(11,481		)	(2,617		)	(51,008		)
Net effect	(2,030		)	11,563			17,718			55,846
EIAs:
Unrealized gains (losses)	1,602			1,367			29,600			36,665
Deferred acquisition costs/retrocession	(1,285		)	(1,848		)	(16,997		)	(23,062		)
Net effect	317			(481		)	12,603			13,603
Guaranteed minimum benefit riders:
Unrealized gains (losses)	32,133			(6,205		)	62,242			16,518
Deferred acquisition costs/retrocession	(17,575		)	4,552			(11,379		)	30,844
Net effect	14,558			(1,653		)	50,863			47,362
Related freestanding derivatives	(9,393		)	(10,026		)	(50,697		)	(61,732		)
Net effect after related freestanding derivatives	5,165			(11,679		)	166			(14,370		)
Total net effect of embedded derivatives	12,845			9,429			81,184			116,811
Related freestanding derivatives	(9,393		)	(10,026		)	(50,697		)	(61,732		)
Total net effect after freestanding derivatives	$	3,452		$	(597	)	$	30,487		$	55,079

Consolidated net premiums increased $72.2 million, or 2.9%, and $403.1 million, or 5.5%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017, primarily due to growth in life reinsurance in force. Foreign currency fluctuations decreased net premiums by $33.4 million in the third quarter and increased net premiums by $86.8 million in the first nine months of 2018, as compared to the same periods in 2017. Consolidated assumed life insurance in force increased to $3,307.2 billion as of September 30, 2018 from $3,297.9 billion as of September 30, 2017 due to new business production and in force transactions. The Company added new business production, measured by face amount of insurance in force, of $95.7 billion and $90.7 billion during the third quarter of 2018 and 2017, respectively, and $292.1 billion and $304.8 billion during the first nine months of 2018 and 2017, respectively. Foreign currency fluctuations negatively affected the increase in assumed life insurance in force from September 30, 2017 by $60.0 billion.

Consolidated investment income, net of related expenses, increased $15.8 million, or 2.8%, and $27.3 million, or 1.7%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increases are primarily attributable to an increase in the average invested asset base partially offset by a decrease in the average investment yield and lower variable investment income. Investment income is affected by changes in the fair value of the Company’s funds withheld at interest assets associated with the reinsurance of certain EIA products. The re-measurement of these funds withheld assets increased investment income by $13.7 million in the third quarter and decreased investment income by $48.9 million in the first nine months of 2018, respectively, as compared to the same periods in 2017. The effect on investment income of the EIA's market value changes is substantially offset by a corresponding change in interest credited to policyholder account balances resulting in an insignificant effect on net income.

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Average invested assets at amortized cost, excluding spread related business, for the nine months ended September 30, 2018 were $26.7 billion, a 6.2% increase over September 30, 2017. The average yield earned on investments, excluding spread related business, was 4.57% and 4.81% for the third quarter of 2018 and 2017, respectively, and 4.45% and 4.61% for the nine months ended September 30, 2018 and 2017, respectively. The average yield will vary from quarter to quarter and year to year depending on a number of variables, including the prevailing interest rate and credit spread environment, prepayment fees, make-whole premiums and changes in the mix of the underlying investments and cash balances, and the timing of dividends and distributions on certain investments. A continued low interest rate environment is expected to put downward pressure on this yield in future reporting periods.

Total investment related gains (losses), net were $(20.0) million and $22.7 million for the third quarter of 2018 and 2017, respectively, and $(31.1) million and $139.5 million for the first nine months of 2018 and 2017, respectively. The unfavorable changes are largely due to asset repositioning related to reinsurance transactions. A portion of the investment related gains (losses) are due to changes in the value of embedded derivatives related to reinsurance treaties written on a modco or funds withheld basis, reflecting the impact of changes in interest rates and credit spreads on the calculation of fair value. Changes in the fair value of these embedded derivatives increased (decreased) investment related gains by $(2.1) million and $23.0 million for the third quarter of 2018 and 2017, respectively, and $20.3 million and $106.9 million for the first nine months of 2018 and 2017, respectively. In addition, impairments on fixed maturity securities increased by $10.3 million in the third quarter and decreased by $6.9 million in the first nine months of 2018, respectively, as compared to the same periods in 2017. See Note 4 - “Investments” and Note 5 - “Derivative Instruments” in the Notes to Condensed Consolidated Financial Statements for additional information on the impairment losses and derivatives.

The effective tax rate on a consolidated basis was 6.7% and 33.1% for the third quarter 2018 and 2017, respectively, and 14.4% and 31.8% for the first nine months of 2018 and 2017, respectively. The 2018 effective tax rates reflect changes to the U.S. tax code related to the Tax Cuts and Jobs Act of 2017. See Note 9 - “Income Tax” in the Notes to Condensed Consolidated Financial Statements for additional information on the Company’s consolidated effective tax rates.

Critical Accounting Policies

The preparation of financial statements in conformity with GAAP requires the application of accounting policies that often involve a significant degree of judgment. Management, on an ongoing basis, reviews estimates and assumptions used in the preparation of financial statements. If management determines that modifications in assumptions and estimates are appropriate given current facts and circumstances, results of operations and financial position as reported in the condensed consolidated financial statements could change significantly.

Management believes the critical accounting policies relating to the following areas are most dependent on the application of estimates and assumptions:

Premiums receivable;

Deferred acquisition costs;

Liabilities for future policy benefits and incurred but not reported claims;

Valuation of investments and other-than-temporary impairments to specific investments;

Valuation of embedded derivatives; and

Income taxes.

A discussion of each of the critical accounting policies may be found in the Company’s 2017 Annual Report under “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Critical Accounting Policies.”

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Results of Operations by Segment

U.S. and Latin America Operations

The U.S. and Latin America operations include business generated by its offices in the U.S., Mexico and Brazil. The offices in Mexico and Brazil provide services to clients in other Latin American countries. U.S. and Latin America operations consist of two major segments: Traditional and Financial Solutions. The Traditional segment primarily specializes in individual mortality-risk reinsurance and to a lesser extent, group, health and long-term care reinsurance. The Financial Solutions segment consists of Asset-Intensive and Financial Reinsurance. Asset-Intensive within the Financial Solutions segment provides coinsurance of annuities and corporate-owned life insurance policies and to a lesser extent also issues fee-based synthetic guaranteed investment contracts, which include investment-only, stable value contracts. Financial Reinsurance within the Financial Solutions segment primarily involves assisting ceding companies in meeting applicable regulatory requirements by enhancing the ceding companies’ financial strength and regulatory surplus position through relatively low risk reinsurance transactions. Due to the low-risk nature of financial reinsurance transactions, they typically do not qualify as reinsurance under GAAP, so only the related net fees are reflected in other revenues on the condensed consolidated statements of income.

For the three months ended September 30, 2018:				Financial Solutions
(dollars in thousands)				Asset-Intensive		Financial Reinsurance		Total U.S. and Latin America
	Traditional
Revenues:
Net premiums	$	1,360,076		$	6,885	$	—	$	1,366,961
Investment income, net of related expenses	181,396			200,397		1,491		383,284
Investment related gains (losses), net	(33		)	581		—		548
Other revenues	6,351			53,735		27,759		87,845
Total revenues	1,547,790			261,598		29,250		1,838,638
Benefits and expenses:
Claims and other policy benefits	1,191,489			46,995		—		1,238,484
Interest credited	20,321			110,673		—		130,994
Policy acquisition costs and other insurance expenses	183,433			30,519		5,324		219,276
Other operating expenses	36,219			7,921		2,343		46,483
Total benefits and expenses	1,431,462			196,108		7,667		1,635,237
Income before income taxes	$	116,328		$	65,490	$	21,583	$	203,401
For the three months ended September 30, 2017:				Financial Solutions
(dollars in thousands)				Asset-Intensive		Financial Reinsurance		Total U.S. and Latin America
	Traditional
Revenues:
Net premiums	$	1,327,181		$	6,423	$	—	$	1,333,604
Investment income, net of related expenses	191,904			188,176		2,984		383,064
Investment related gains (losses), net	(1,503		)	12,832		—		11,329
Other revenues	3,801			26,899		26,856		57,556
Total revenues	1,521,383			234,330		29,840		1,785,553
Benefits and expenses:
Claims and other policy benefits	1,118,401			11,959		—		1,130,360
Interest credited	20,673			94,120		—		114,793
Policy acquisition costs and other insurance expenses	189,291			54,441		5,674		249,406
Other operating expenses	32,506			6,684		2,174		41,364
Total benefits and expenses	1,360,871			167,204		7,848		1,535,923
Income before income taxes	$	160,512		$	67,126	$	21,992	$	249,630

50

For the nine months ended September 30, 2018:				Financial Solutions
(dollars in thousands)				Asset-Intensive		Financial Reinsurance		Total U.S. and Latin America
	Traditional
Revenues:
Net premiums	$	4,033,046		$	18,776	$	—	$	4,051,822
Investment income, net of related expenses	544,934			530,119		4,817		1,079,870
Investment related gains (losses), net	5,375			2,033		—		7,408
Other revenues	18,276			100,759		77,644		196,679
Total revenues	4,601,631			651,687		82,461		5,335,779
Benefits and expenses:
Claims and other policy benefits	3,701,457			85,530		—		3,786,987
Interest credited	61,593			239,695		—		301,288
Policy acquisition costs and other insurance expenses	543,137			130,493		11,933		685,563
Other operating expenses	104,246			22,377		7,238		133,861
Total benefits and expenses	4,410,433			478,095		19,171		4,907,699
Income before income taxes	$	191,198		$	173,592	$	63,290	$	428,080
For the nine months ended September 30, 2017:				Financial Solutions
(dollars in thousands)				Asset-Intensive		Financial Reinsurance		Total U.S. and Latin America
	Traditional
Revenues:
Net premiums	$	3,966,842		$	18,186	$	—	$	3,985,028
Investment income, net of related expenses	554,612			553,286		6,501		1,114,399
Investment related gains (losses), net	(192		)	103,229		—		103,037
Other revenues	11,322			76,324		77,466		165,112
Total revenues	4,532,584			751,025		83,967		5,367,576
Benefits and expenses:
Claims and other policy benefits	3,538,958			53,998		—		3,592,956
Interest credited	61,800			260,941		—		322,741
Policy acquisition costs and other insurance expenses	556,476			176,305		17,234		750,015
Other operating expenses	94,284			19,883		6,942		121,109
Total benefits and expenses	4,251,518			511,127		24,176		4,786,821
Income before income taxes	$	281,066		$	239,898	$	59,791	$	580,755

Income before income taxes decreased by $46.2 million, or 18.5%, and $152.7 million, or 26.3%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decrease in income before income taxes for the third quarter was primarily due to claims experience in the group disability and healthcare excess lines of business as well as lower variable investment income. The decrease in income before income taxes for the first nine months was primarily due to claims experience in group and individual life lines of business, partially related to a severe influenza season in 2018. Also contributing to the year over year decline in income were lower investment related gains and changes in the value of the embedded derivatives associated with reinsurance treaties structured on a modco or funds withheld basis.

Traditional Reinsurance

Income before income taxes for the U.S. and Latin America Traditional segment decreased by $44.2 million, or 27.5%, and $89.9 million, or 32.0%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decrease in the third quarter was primarily due to claims experience in the group disability and healthcare excess lines of business, as well as lower variable investment income. The decrease for the first nine months also reflects unfavorable claims experience across all lines of business, in part relating to the severe influenza season.

Net premiums increased $32.9 million, or 2.5%, and $66.2 million, or 1.7%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increases in net premiums in the third quarter and first nine months were reduced by $24.7 million and $76.5 million, respectively, due to the restructure of a health treaty. After adjusting for the treaty restructure, net premiums increased 4.4% and 3.7% in the third quarter and first nine months of 2018, respectively, compared to the same periods in 2017, due to new business and expected organic growth mainly in the group and mortality lines of business. The segment added new individual life business production, measured by face amount of insurance in force of $27.6 billion and $24.8 billion for the third quarter and $80.2 billion and $75.1 billion for the first nine months of 2018 and 2017, respectively.

Net investment income decreased $10.5 million, or 5.5%, and $9.7 million, or 1.7%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decreases in the third quarter and first nine months were primarily due to lower variable investment income. Investment related gains (losses), net increased $1.5 million and $5.6 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

51

Claims and other policy benefits as a percentage of net premiums (“loss ratios”) were 87.6% and 84.3% for the third quarter and 91.8% and 89.2%, for the nine months ended September 30, 2018 and 2017, respectively. The increases in the loss ratios for the third quarter and first nine months of 2018, as compared to the same periods in 2017 were primarily due to unfavorable claims experience in the group line of business. The individual mortality line of business also contributed to the increase in the loss ratio for the first nine months of 2018. Management believes a portion of the unfavorable variance is the normal volatility associated with influenza season.

Interest credited expense decreased $0.4 million, or 1.7%, and $0.2 million, or 0.3%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. Interest credited in this segment relates to amounts credited on cash value products which also have a significant mortality component. Income before income taxes is affected by the spread between the investment income and the interest credited on the underlying products.

Policy acquisition costs and other insurance expenses as a percentage of net premiums were 13.5% and 14.3% for the third quarter and 13.5% and 14.0% for the nine months ended September 30, 2018 and 2017, respectively. While these ratios are expected to remain in a predictable range, they may fluctuate from period to period due to varying allowance levels within coinsurance-type arrangements. In addition, the amortization pattern of previously capitalized amounts, which are subject to the form of the reinsurance agreement and the underlying insurance policies, may vary. Also, the mix of first year coinsurance business versus yearly renewable term business can cause the percentage to fluctuate from period to period

Other operating expenses increased $3.7 million, or 11.4%, and $10.0 million, or 10.6%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increase in operating expenses, for both periods, is primarily related to expense growth associated with key business line initiatives focused on enhancing the services and reinsurance options for clients. Other operating expenses, as a percentage of net premiums were 2.7% and 2.4% for the third quarter and 2.6% and 2.4% first nine months of 2018 and 2017, respectively. The expense ratio tends to fluctuate only slightly from period to period due to the maturity and scale of this segment.

Financial Solutions - Asset-Intensive Reinsurance

Asset-Intensive reinsurance within the U.S. and Latin America Financial Solutions segment primarily involves assuming investment risk within underlying annuities and corporate-owned life insurance policies. Most of these agreements are coinsurance, coinsurance with funds withheld or modco. The Company recognizes profits or losses primarily from the spread between the investment income earned and the interest credited on the underlying deposit liabilities, income associated with longevity risk, and fees associated with variable annuity account values and guaranteed investment contracts.

Impact of certain derivatives:

Income from the asset-intensive business tends to be volatile due to changes in the fair value of certain derivatives, including embedded derivatives associated with reinsurance treaties structured on a modco or funds withheld basis, as well as embedded derivatives associated with the Company’s reinsurance of equity-indexed annuities and variable annuities with guaranteed minimum benefit riders. Fluctuations occur period to period primarily due to changing investment conditions including, but not limited to, interest rate movements (including risk-free rates and credit spreads), implied volatility, the Company’s own credit risk and equity market performance, all of which are factors in the calculations of fair value. Therefore, management believes it is helpful to distinguish between the effects of changes in these derivatives, net of related hedging activity, and the primary factors that drive profitability of the underlying treaties, namely investment income, fee income (included in other revenues), and interest credited. These fluctuations are considered unrealized by management and do not affect current cash flows, crediting rates or spread performance on the underlying treaties.

The following table summarizes the asset-intensive results and quantifies the impact of these embedded derivatives for the periods presented. Revenues before certain derivatives, benefits and expenses before certain derivatives, and income before income taxes and certain derivatives, should not be viewed as substitutes for GAAP revenues, GAAP benefits and expenses, and GAAP income before income taxes.

52

(dollars in thousands)	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Revenues:
Total revenues	$	261,598		$	234,330		$	651,687		$	751,025
Less:
Embedded derivatives – modco/funds withheld treaties	(2,138		)	24,539			14,819			107,039
Guaranteed minimum benefit riders and related free standing derivatives	8,067			(17,058		)	5,556			(20,935		)
Revenues before certain derivatives	255,669			226,849			631,312			664,921
Benefits and expenses:
Total benefits and expenses	196,108			167,204			478,095			511,127
Less:
Embedded derivatives – modco/funds withheld treaties	(51		)	11,481			2,617			51,008
Guaranteed minimum benefit riders and related free standing derivatives	2,902			(5,379		)	5,390			(6,565		)
Equity-indexed annuities	(317		)	481			(12,603		)	(13,603		)
Benefits and expenses before certain derivatives	193,574			160,621			482,691			480,287
Income before income taxes:
Income before income taxes	65,490			67,126			173,592			239,898
Less:
Embedded derivatives – modco/funds withheld treaties	(2,087		)	13,058			12,202			56,031
Guaranteed minimum benefit riders and related free standing derivatives	5,165			(11,679		)	166			(14,370		)
Equity-indexed annuities	317			(481		)	12,603			13,603
Income before income taxes and certain derivatives	$	62,095		$	66,228		$	148,621		$	184,634

Embedded Derivatives - Modco/Funds Withheld Treaties - Represents the change in the fair value of embedded derivatives on funds withheld at interest associated with treaties written on a modco or funds withheld basis. The fair value changes of embedded derivatives on funds withheld at interest associated with treaties written on a modco or funds withheld basis are reflected in revenues, while the related impact on deferred acquisition expenses is reflected in benefits and expenses. The Company’s utilization of a credit valuation adjustment did not have a material effect on the change in fair value of these embedded derivatives for the nine months ended September 30, 2018 and 2017.

The change in fair value of the embedded derivatives - modco/funds withheld treaties increased (decreased) income before income taxes by $(2.1) million and $13.1 million for the third quarter and $12.2 million and $56.0 million for the nine months ended September 30, 2018 and 2017, respectively. The decrease in income for the third quarter of 2018 was primarily the result of interest rate movements. The increases in income for the first nine months of 2018 and 2017, and for the third quarter of 2017 were primarily due to tightening credit spreads.

Guaranteed Minimum Benefit Riders - Represents the impact related to guaranteed minimum benefits associated with the Company’s reinsurance of variable annuities. The fair value changes of the guaranteed minimum benefits along with the changes in fair value of the free standing derivatives (interest rate swaps, financial futures and equity options), purchased by the Company to substantially hedge the liability are reflected in revenues, while the related impact on deferred acquisition expenses is reflected in benefits and expenses. The Company’s utilization of a credit valuation adjustment did not have a material effect on the change in fair value of these embedded derivatives for the nine months ended September 30, 2018 and 2017.

The change in fair value of the guaranteed minimum benefits, after allowing for changes in the associated free standing derivatives, increased income before income taxes by $5.2 million and decreased by $11.7 million for the third quarter and increased (decreased) by $0.2 million and $(14.4) million for the nine months ended September 30, 2018 and 2017, respectively. The increase in income for the third quarter was primarily due to the annual update of best estimate actuarial policyholder assumptions associated with the continuation of benefits payable to spouses after the death of the policyholder. The increase in income for the first nine months of September 30, 2018 was primarily due to the annual update of best estimate actuarial policyholder assumptions, offset by interest rate movements. The decreases in income for the third quarter and first nine months of 2017 were primarily due to the annual update of best estimate actuarial assumptions to account for lower policyholder lapse experience.

53

Equity-Indexed Annuities - Represents changes in the liability for equity-indexed annuities in excess of changes in account value, after adjustments for related deferred acquisition expenses. The change in fair value of embedded derivative liabilities associated with equity-indexed annuities increased (decreased) income before income taxes by $0.3 million and $(0.5) million for the third quarter and $12.6 million and $13.6 million for the nine months ended September 30, 2018 and 2017, respectively.  The increases in income for the third quarter and first nine months of 2018 were primarily due to lower policyholder lapses and withdrawals. The decrease in income for the third quarter of 2017 was primarily due to shifts in the yield curve. The increase in income for the first nine months of 2017 was primarily due to declining long-term interest rates.

The changes in derivatives discussed above are considered unrealized by management and do not affect current cash flows, crediting rates or spread performance on the underlying treaties. Fluctuations occur period to period primarily due to changing investment conditions including, but not limited to, interest rate movements (including benchmark rates and credit spreads), credit valuation adjustments, implied volatility and equity market performance, all of which are factors in the calculations of fair value. Therefore, management believes it is helpful to distinguish between the effects of changes in these derivatives and the primary factors that drive profitability of the underlying treaties, namely investment income, fee income (included in other revenues) and interest credited.

Discussion and analysis before certain derivatives:

Income before income taxes and certain derivatives decreased by $4.1 million and $36.0 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decreases in the third quarter and first nine months were primarily due to lower investment related gains (losses), net of the corresponding impact to deferred acquisition costs, associated with coinsurance portfolios.

Revenue before certain derivatives increased by $28.8 million and decreased by $33.6 million for the three and nine months ended September 30, 2018, respectively, as compared to the same periods in 2017. The increase in the third quarter was primarily due to revenues from new transactions. The decrease in the first nine months was primarily due to the change in fair value of equity options associated with the reinsurance of EIAs and lower investment related gains (losses) associated with coinsurance portfolios, partially offset by revenues from new transactions. The effect on investment income related to equity options is substantially offset by a corresponding change in interest credited.

Benefits and expenses before certain derivatives increased by $33.0 million and $2.4 million for the three and nine months ended September 30, 2018, as compared to the same period in 2017. The increase in the third quarter was primarily due to new transactions. The increase for the first nine months was primarily due to new transactions, offset by lower interest credited associated with the reinsurance of EIAs. The effect on interest credited related to equity options is substantially offset by a corresponding change in investment income.

The invested asset base supporting this segment increased to $19.0 billion as of September 30, 2018 from $15.5 billion as of September 30, 2017 of which $2.9 billion was due to a new annuity transaction in the third quarter of 2018. As of September 30, 2018, $4.0 billion of the invested assets were funds withheld at interest, of which greater than 90% is associated with one client.

Financial Solutions - Financial Reinsurance

Financial Reinsurance within the U.S. and Latin America Financial Solutions segment income before income taxes consists primarily of net fees earned on financial reinsurance transactions. Additionally, a portion of the business is brokered business in which the Company does not participate in the assumption of risk. The fees earned from financial reinsurance contracts and brokered business are reflected in other revenues, and the fees paid to retrocessionaires are reflected in policy acquisition costs and other insurance expenses.

Income before income taxes decreased $0.4 million, or 1.9%, and increased $3.5 million, or 5.9%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increase in the first nine months was primarily due to growth in new transactions.

At September 30, 2018 and 2017, the amount of reinsurance assumed from client companies, as measured by pre-tax statutory surplus, risk based capital and other financial structures was $13.7 billion and $12.6 billion, respectively. The increase was primarily due to new transactions, as well as organic growth on existing transactions. Fees earned from this business can vary significantly depending on the size of the transactions and the timing of their completion and therefore can fluctuate from period to period.

54

Canada Operations

The Company conducts reinsurance business in Canada primarily through RGA Canada, which assists clients with capital management activity and mortality and morbidity risk management. The Canada operations are primarily engaged in Traditional reinsurance, which consists mainly of traditional individual life reinsurance, as well as creditor, group life and health, critical illness and disability reinsurance. Creditor insurance covers the outstanding balance on personal, mortgage or commercial loans in the event of death, disability or critical illness and is generally shorter in duration than traditional individual life insurance. The Canada Financial Solutions segment consists of longevity and financial reinsurance.

(dollars in thousands)	Three months ended September 30,
	2018						2017
Revenues:	Traditional		Financial Solutions		Total Canada		Traditional		Financial Solutions		Total Canada
Net premiums	$	243,105	$	10,681	$	253,786	$	225,841	$	9,874	$	235,715
Investment income, net of related expenses	50,145		415		50,560		51,593		1,120		52,713
Investment related gains (losses), net	2,484		—		2,484		2,380		—		2,380
Other revenues	228		1,072		1,300		1,281		1,436		2,717
Total revenues	295,962		12,168		308,130		281,095		12,430		293,525
Benefits and expenses:
Claims and other policy benefits	210,292		10,003		220,295		193,978		7,170		201,148
Interest credited	6		—		6		6		—		6
Policy acquisition costs and other insurance expenses	56,224		190		56,414		50,023		221		50,244
Other operating expenses	8,291		329		8,620		8,299		567		8,866
Total benefits and expenses	274,813		10,522		285,335		252,306		7,958		260,264
Income before income taxes	$	21,149	$	1,646	$	22,795	$	28,789	$	4,472	$	33,261

(dollars in thousands)	Nine months ended September 30,
	2018						2017
Revenues:	Traditional		Financial Solutions		Total Canada		Traditional		Financial Solutions		Total Canada
Net premiums	$	756,578	$	32,941	$	789,519	$	662,983	$	28,598	$	691,581
Investment income, net of related expenses	150,264		860		151,124		140,929		3,515		144,444
Investment related gains (losses), net	2,199		—		2,199		8,821		—		8,821
Other revenues	1,439		3,233		4,672		1,910		4,127		6,037
Total revenues	910,480		37,034		947,514		814,643		36,240		850,883
Benefits and expenses:
Claims and other policy benefits	647,052		27,033		674,085		566,227		21,888		588,115
Interest credited	32		—		32		15		—		15
Policy acquisition costs and other insurance expenses	171,797		578		172,375		143,302		571		143,873
Other operating expenses	24,938		1,042		25,980		24,146		1,292		25,438
Total benefits and expenses	843,819		28,653		872,472		733,690		23,751		757,441
Income before income taxes	$	66,661	$	8,381	$	75,042	$	80,953	$	12,489	$	93,442

Income before income taxes decreased by $10.5 million, or 31.5%, and $18.4 million, or 19.7%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decreases in income for the third quarter and first nine months are primarily due to unfavorable traditional individual life mortality experience as compared to the same periods in 2017. Foreign currency exchange fluctuations in the Canadian dollar resulted in a decrease in income before income taxes of $1.1 million and an increase of $1.2 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Traditional Reinsurance

Income before income taxes for the Canada Traditional segment decreased by $7.6 million, or 26.5%, and $14.3 million, or 17.7%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decreases in income before income taxes for the third quarter and first nine months were primarily due to unfavorable traditional individual life mortality experience. Foreign currency exchange fluctuations in the Canadian dollar resulted in a decrease in income before income taxes of $1.1 million and an increase of $0.9 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

55

Net premiums increased $17.3 million, or 7.6%, and $93.6 million, or 14.1%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increases in net premiums were primarily due to a new in force block transaction during the first quarter of 2018. Foreign currency exchange fluctuations in the Canadian dollar resulted in a decrease in net premiums of $10.5 million and an increase of $10.6 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Net investment income decreased $1.4 million, or 2.8%, and increased $9.3 million, or 6.6%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. Foreign currency exchange fluctuation in the Canadian dollar resulted in a decrease in net investment income of $2.2 million and an increase of $2.0 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. Also contributing to the increase in the first nine months of 2018 was an increase in the invested asset base due to growth in the underlying business volume and an increase in investment yields.

Other revenues decreased by $1.1 million and $0.5 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. These variances are primarily due to gains and losses related to foreign currency transactions.

Loss ratios for this segment were 86.5% and 85.9% for the third quarter and 85.5% and 85.4% for the nine months ended September 30, 2018 and 2017, respectively. The increase in the loss ratios for the three and nine months ended September 30, 2018, as compared to the same periods in 2017, is due to unfavorable traditional individual life mortality experience. Loss ratios for the traditional individual life mortality business were 96.7% and 99.5% for the third quarter and 95.3% and 98.7% for the first nine months ended September 30, 2018 and 2017, respectively. The aforementioned new in force block reduced the traditional individual life mortality business loss ratios in the third quarter and first nine months of 2018 by 5.6% and 5.9%, respectively. Historically, the loss ratio increased primarily as the result of several large permanent level premium in force blocks assumed in 1997 and 1998. These blocks are mature blocks of long-term permanent level premium business in which mortality as a percentage of net premiums is expected to be higher than historical ratios. The nature of permanent level premium policies requires the Company to set up actuarial liabilities and invest the amounts received in excess of early-year claims costs to fund claims in later years when premiums, by design, continue to be level as compared to expected increasing mortality or claim costs. As such, investment income becomes a more significant component of profitability of these in force blocks. Excluding creditor business, claims and other policy benefits, as a percentage of net premiums and investment income were 77.2% and 77.7% for the third quarter and 76.8% and 77.7% for the nine months ended September 30, 2018 and 2017, respectively.

Policy acquisition costs and other insurance expenses as a percentage of net premiums were 23.1% and 22.1% for the third quarter and 22.7% and 21.6% for the nine months ended September 30, 2018 and 2017, respectively. Overall, while these ratios are expected to remain in a predictable range, they may fluctuate from period to period due to varying allowance levels and product mix. In addition, the amortization patterns of previously capitalized amounts, which are subject to the form of the reinsurance agreement and the underlying insurance policies, may vary.

Other operating expenses were unchanged and increased $0.8 million, or 3.3%, for the three and nine months ended September 30, 2018, respectively, as compared to the same periods in 2017. Other operating expenses as a percentage of net premiums were 3.4% and 3.7% for the third quarter and 3.3% and 3.6% for the nine month periods ended September 30, 2018 and 2017, respectively.

Financial Solutions Reinsurance

Income before income taxes decreased by $2.8 million, or 63.2%, and $4.1 million, or 32.9%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decreases in income were primarily a result of normal aging of the longevity block of business and a decrease in net investment income as a result of a decrease in the invested asset base. Foreign currency exchange fluctuations in the Canadian dollar resulted in a decrease in income before income taxes of $0.1 million and an increase of $0.3 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Net premiums increased $0.8 million, or 8.2%, and $4.3 million, or 15.2%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increases were primarily due to longevity business, where the premium structure generally increases over time. Foreign currency exchange fluctuations in the Canadian dollar resulted in a decrease in net premiums of $0.5 million and an increase of $0.5 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Net investment income decreased $0.7 million, or 62.9%, and $2.7 million, or 75.5%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017 primarily due to a decrease in the invested asset base.

Claims and other policy benefits increased $2.8 million, or 39.5%, and $5.1 million, or 23.5%, for the three and nine months ended September 30, 2018 as compared to the same periods in 2017. The increases for the third quarter and first nine months were primarily a result of normal aging of the longevity block of business.

56

Europe, Middle East and Africa Operations

The Europe, Middle East and Africa (“EMEA”) operations include business generated by its offices principally in the United Kingdom (“UK”), South Africa, France, Germany, Ireland, Italy, the Netherlands, Poland, Spain and the Middle East region. EMEA consists of two major segments: Traditional and Financial Solutions. The Traditional segment primarily provides reinsurance through yearly renewable term and coinsurance agreements on a variety of life, health and critical illness products. Reinsurance agreements may be facultative or automatic agreements covering primarily individual risks and, in some markets, group risks. The Financial Solutions segment consists of reinsurance and other transactions associated with longevity closed blocks, payout annuities, capital management solutions and financial reinsurance.

(dollars in thousands)	Three months ended September 30,
	2018								2017
Revenues:	Traditional		Financial Solutions			Total EMEA			Traditional		Financial Solutions		Total EMEA
Net premiums	$	340,414	$	49,104		$	389,518		$	344,211	$	39,294	$	383,505
Investment income, net of related expenses	16,190		37,548			53,738			14,727		30,892		45,619
Investment related gains (losses), net	—		(87		)	(87		)	—		1,192		1,192
Other revenues	455		5,099			5,554			2,034		5,663		7,697
Total revenues	357,059		91,664			448,723			360,972		77,041		438,013
Benefits and expenses:
Claims and other policy benefits	291,442		24,211			315,653			285,071		35,648		320,719
Interest credited	—		2,402			2,402			—		2,475		2,475
Policy acquisition costs and other insurance expenses	21,817		814			22,631			35,751		327		36,078
Other operating expenses	25,430		8,032			33,462			24,729		7,638		32,367
Total benefits and expenses	338,689		35,459			374,148			345,551		46,088		391,639
Income before income taxes	$	18,370	$	56,205		$	74,575		$	15,421	$	30,953	$	46,374

(dollars in thousands)	Nine months ended September 30,
	2018						2017
Revenues:	Traditional		Financial Solutions		Total EMEA		Traditional		Financial Solutions		Total EMEA
Net premiums	$	1,070,677	$	146,218	$	1,216,895	$	979,733	$	119,809	$	1,099,542
Investment income, net of related expenses	49,041		109,810		158,851		41,032		88,602		129,634
Investment related gains (losses), net	9		9,123		9,132		7		8,225		8,232
Other revenues	3,652		15,331		18,983		4,206		13,799		18,005
Total revenues	1,123,379		280,482		1,403,861		1,024,978		230,435		1,255,413
Benefits and expenses:
Claims and other policy benefits	928,431		88,536		1,016,967		846,476		108,381		954,857
Interest credited	—		3,877		3,877		—		6,297		6,297
Policy acquisition costs and other insurance expenses	77,330		2,948		80,278		66,263		1,070		67,333
Other operating expenses	77,359		24,383		101,742		71,488		22,911		94,399
Total benefits and expenses	1,083,120		119,744		1,202,864		984,227		138,659		1,122,886
Income before income taxes	$	40,259	$	160,738	$	200,997	$	40,751	$	91,776	$	132,527

Income before income taxes increased by $28.2 million, or 60.8%, and $68.5 million, or 51.7%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increase in income before income taxes for the third quarter was primarily due to favorable performance in the closed block longevity, payout annuity and individual life businesses partly offset by unfavorable group mortality experience. The increases in income before income taxes for the first nine months were primarily due to favorable performance in the closed block longevity, payout annuity and critical illness business partially offset by unfavorable individual life experience. Foreign currency exchange fluctuations resulted in a decrease in income before income taxes of $1.0 million and an increase of $9.4 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

57

Traditional Reinsurance

Income before income taxes increased by $2.9 million, or 19.1%, and decreased by $0.5 million, or 1.2%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increase in income for the third quarter was primarily due to more favorable individual life and critical illness experience coupled with lower policy acquisition costs, partially offset by less favorable group mortality experience. The decrease in income for the first nine months was primarily due to unfavorable individual life mortality experience, partially offset by favorable critical illness experience. Foreign currency exchange fluctuations resulted in a decrease in income before income taxes of $0.4 million and an increase of $2.4 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Net premiums decreased $3.8 million, or 1.1%, and increased $90.9 million, or 9.3%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decrease in net premiums for the three months was primarily due to a large transaction completed in the third quarter of 2017. The increase in net premiums for the first nine months were primarily due to increased volumes of mostly individual life business as well as increased health business. Foreign currency exchange fluctuations decreased net premiums by $6.4 million and increased them by $52.6 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

A portion of the net premiums for the segment, in each period presented, relates to reinsurance of critical illness coverage, primarily in the UK. This coverage provides a benefit in the event of the diagnosis of a pre-defined critical illness. Net premiums earned from this coverage totaled $45.6 million and $49.0 million for the third quarter and $142.4 million and $144.2 million for the first nine months of 2018 and 2017, respectively.

Net investment income increased $1.5 million, or 9.9%, and $8.0 million, or 19.5%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increase in net investment income for the third quarter was primarily due to an increase in the invested asset base resulting from business growth. The increase in net investment income for the first nine months was due to an increase in the invested asset base and increased invested asset yield. Foreign currency exchange fluctuations resulted in a decrease in net investment income of $0.3 million and an increase of $2.4 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Loss ratios for this segment were 85.6% and 82.8% for the third quarter and 86.7% and 86.4% for the first nine months ended September 30, 2018 and 2017, respectively. The increases in loss ratios were due in part to normal claims variability and differences in business mix, with the third quarter of 2018 having both higher benefits and lower policy acquisition costs as a percentage of premium.

Policy acquisition costs and other insurance expenses as a percentage of net premiums were 6.4% and 10.4% for the third quarter and 7.2% and 6.8% for the first nine months ended September 30, 2018 and 2017, respectively. The decrease in policy acquisition cost ratio for the third quarter was primarily due to the aforementioned large transaction completed in 2017, which included ceding allowances. The increase in the percentage for the first nine months is due primarily to variations in the mixture of business. A small number of recent larger new treaties have included higher than average ceding allowances.

Other operating expenses increased $0.7 million, or 2.8%, and $5.9 million, or 8.2%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. Foreign currency fluctuations resulted in a decrease in operating expenses of $0.5 million and an increase of $3.8 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. Other operating expenses as a percentage of net premiums totaled 7.5% and 7.2% for the third quarter and 7.2% and 7.3% for the first nine months ended September 30, 2018 and 2017, respectively.

Financial Solutions Reinsurance

Income before income taxes increased by $25.3 million, or 81.6%, and $69.0 million, or 75.1%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increases in income before income taxes were primarily due to favorable performance in the closed block longevity and payout annuity businesses. Foreign currency exchange fluctuations resulted in a decrease in income before income taxes of $0.7 million and an increase of $7.0 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Net premiums increased by $9.8 million, or 25.0%, and $26.4 million, or 22.0%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increases in net premiums were due to increased volumes of closed block longevity business. Foreign currency exchange fluctuations decreased net premiums by $0.2 million and increased them by $8.1 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

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Net investment income increased $6.7 million, or 21.5%, and $21.2 million, or 23.9%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increases in investment income were due to an increased invested asset base resulting from business growth. Foreign currency exchange fluctuations resulted in a decrease in net investment income of $0.2 million and an increase of $5.5 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Other revenues decreased by $0.6 million, or 10.0%, and increased by $1.5 million, or 11.1%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decrease in other revenues for the third quarter was primarily due to the fair value change on longevity derivative contracts in the third quarter of 2017. The increase in other revenues for the first nine months of 2018 was primarily due to increased volumes of fee income business. Foreign currency exchange fluctuations resulted in a decrease in other revenues of $0.1 million and an increase of $0.8 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Claims and other policy benefits decreased $11.4 million, or 32.1%, and $19.8 million, or 18.3%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decrease in the third quarter was due to higher terminations in closed block longevity and payout annuity businesses. The decrease in the first nine months was primarily due to higher terminations in closed block longevity business. Foreign currency exchange fluctuations resulted in an increase in claims and other policy benefits of $0.3 million and $6.8 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Interest credited expense decreased by $0.1 million and $2.4 million or the three and nine months ended September 30, 2018, as compared to the same periods in 2017. Interest credited in this segment relates to amounts credited to the contractholders of unit-linked products. The effect on interest credited related to unit-linked products is substantially offset by a corresponding change in investment income.

Other operating expenses increased $0.4 million, or 5.2%, and $1.5 million, or 6.4%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017 due to normal growth in operations. Foreign currency exchange fluctuations resulted in a decrease in operating expenses of $0.1 million and an increase of $1.5 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Asia Pacific Operations

The Asia Pacific operations include business generated by its offices principally in Australia, China, Hong Kong, India, Japan, Malaysia, New Zealand, Singapore, South Korea and Taiwan. The Traditional segment’s principal types of reinsurance include individual and group life and health, critical illness, disability and superannuation. Superannuation is the Australian government mandated compulsory retirement savings program. Superannuation funds accumulate retirement funds for employees, and, in addition, typically offer life and disability insurance coverage. The Financial Solutions segment includes financial reinsurance, asset-intensive and certain disability and life blocks. Reinsurance agreements may be facultative or automatic agreements covering primarily individual risks and in some markets, group risks.

(dollars in thousands)	Three months ended September 30,
	2018								2017
Revenues:	Traditional		Financial Solutions			Total Asia Pacific			Traditional		Financial Solutions			Total Asia Pacific
Net premiums	$	551,695	$	75		$	551,770		$	536,931	$	19		$	536,950
Investment income, net of related expenses	23,169		10,145			33,314			23,858		10,556			34,414
Investment related gains (losses), net	—		(438		)	(438		)	—		758			758
Other revenues	3,171		6,385			9,556			871		5,599			6,470
Total revenues	578,035		16,167			594,202			561,660		16,932			578,592
Benefits and expenses:
Claims and other policy benefits	431,570		3,894			435,464			442,358		6,110			448,468
Interest credited	—		6,875			6,875			—		7,026			7,026
Policy acquisition costs and other insurance expenses	42,063		786			42,849			55,891		653			56,544
Other operating expenses	42,395		4,406			46,801			36,847		3,372			40,219
Total benefits and expenses	516,028		15,961			531,989			535,096		17,161			552,257
Income (loss) before income taxes	$	62,007	$	206		$	62,213		$	26,564	$	(229	)	$	26,335

59

(dollars in thousands)	Nine months ended September 30,
	2018						2017
Revenues:	Traditional		Financial Solutions		Total Asia Pacific		Traditional		Financial Solutions		Total Asia Pacific
Net premiums	$	1,680,007	$	783	$	1,680,790	$	1,557,590	$	2,094	$	1,559,684
Investment income, net of related expenses	71,845		30,723		102,568		68,105		24,662		92,767
Investment related gains (losses), net	8		4,933		4,941		—		11,525		11,525
Other revenues	11,234		17,566		28,800		2,724		17,087		19,811
Total revenues	1,763,094		54,005		1,817,099		1,628,419		55,368		1,683,787
Benefits and expenses:
Claims and other policy benefits	1,362,356		10,767		1,373,123		1,221,091		14,170		1,235,261
Interest credited	—		19,929		19,929		—		15,595		15,595
Policy acquisition costs and other insurance expenses	138,429		2,711		141,140		180,007		4,111		184,118
Other operating expenses	118,553		12,233		130,786		105,747		10,472		116,219
Total benefits and expenses	1,619,338		45,640		1,664,978		1,506,845		44,348		1,551,193
Income before income taxes	$	143,756	$	8,365	$	152,121	$	121,574	$	11,020	$	132,594

Income before income taxes increased by $35.9 million, or 136.2%, and $19.5 million, or 14.7%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increases in income before income taxes for the third quarter and first nine months were due to business growth across the region and net favorable claims experience in Asia. Foreign currency exchange fluctuations resulted in an increase in income before income taxes of $1.1 million and $2.2 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Traditional Reinsurance

Income before income taxes increased by $35.4 million, or 133.4%, and $22.2 million, or 18.2%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increase in income before income taxes for the three and nine months ended September 30, 2018 was primarily due to business growth across the region and favorable claims experience in Asia partially offset by adverse claims experience in Australia. Foreign currency exchange fluctuations resulted in an increase in income before income taxes of $1.2 million and $2.1 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Net premiums increased by $14.8 million, or 2.7%, and $122.4 million, or 7.9%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increases were driven by new business written in Asian markets partially offset by the effect of three treaties recaptured in Australia in the fourth quarter of 2017. Foreign currency exchange fluctuations resulted in a decrease in net premiums of $14.9 million and an increase of $15.6 million for the three and nine months of 2018, as compared to the same periods in 2017.

A portion of the net premiums for the segment, in each period presented, relates to reinsurance of critical illness coverage. This coverage provides a benefit in the event of the diagnosis of a pre-defined critical illness. Reinsurance of critical illness in the segment is offered primarily in South Korea, Australia and Hong Kong. Net premiums earned from this coverage totaled $191.1 million and $158.6 million for the third quarter and $607.7 million and $474.8 million for the first nine months ended September 30, 2018 and 2017, respectively.

Net investment income decreased $0.7 million, or 2.9%, and increased $3.7 million, or 5.5%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decrease in the third quarter was primarily due to foreign currency exchange fluctuations. The increase in the first nine months of 2018 was primarily due to an increase in investment yield, partially offset by a slightly lower asset base, for the nine months ended September 30, 2018, compared to the nine months ended September 30, 2017. Foreign currency exchange fluctuations resulted in a decrease in net investment income of $1.1 million and $0.1 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Other revenues increased by $2.3 million, or 264.1%, and $8.5 million, or 312.4%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. Foreign currency exchange fluctuations resulted in an increase in other revenues of $0.6 million and $0.8 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Loss ratios for this segment were 78.2% and 82.4% for the third quarter and 81.1% and 78.4% for the first nine months endedSeptember 30, 2018 and 2017, respectively. The decrease in the loss ratios for the third quarter was primarily due to favorable claims experience in Asia, partially offset by adverse claims experience in Australia. The increase in the first nine months of 2018 was primarily due to new business mix, partially offset by assumption updates reflecting net favorable claims experience.

60

Policy acquisition costs and other insurance expenses as a percentage of net premiums were 7.6% and 10.4% for the third quarter and 8.2% and 11.6% for the nine months endedSeptember 30, 2018 and 2017, respectively. These percentages fluctuate due to timing of client company reporting, premium refunds, variations in the mixture of business and the relative maturity of the business.In addition, as the segment grows, renewal premiums, which have lower allowances than first-year premiums, represent a greater percentage of the total net premiums.

Other operating expenses increased $5.5 million, or 15.1%, and $12.8 million, or 12.1%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017 mainly due to growth in operations in Asia and consultant expenditures. Other operating expenses as a percentage of net premiums totaled 7.7% and 6.9% for the third quarter and 7.1% and 6.8% for the first nine months endedSeptember 30, 2018 and 2017, respectively. The timing of premium flows and the level of costs associated with the entrance into and development of new markets within the segment may cause other operating expenses as a percentage of net premiums to fluctuate over periods of time.

Financial Solutions Reinsurance

Income before income taxes increased by $0.4 million, or 190.0%, and decreased by $2.7 million, or 24.1%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decrease in income before income taxes for the first nine months of 2018 was primarily due to a decline in investment related gains (losses) associated with a closed treaty in Japan. Foreign currency exchange fluctuations had a negligible effect on income before income taxes for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Net premiums increased $0.1 million or 294.7%, and decreased by $1.3 million, or 62.6%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decrease for the first nine months was due to policy lapses on a closed treaty in Japan. Foreign currency exchange fluctuations had a negligible effect on net premiums for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Net investment income decreased $0.4 million, or 3.9%, and increased by $6.1 million, or 24.6%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017 mainly due to an increase in investment yield, partially offset by a slightly lower asset base. Foreign currency exchange fluctuations resulted in a decrease on net investment income of $0.4 million and $0.1 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017.

Other revenues increased by $0.8 million, or 14.0%, and $0.5 million, or 2.8%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. At September 30, 2018 and 2017, the amount of reinsurance assumed from client companies, as measured by pre-tax statutory surplus, risk based capital and other financial reinsurance structures was $2.9 billion and $2.4 billion, respectively. Fees earned from this business can vary significantly depending on the size of the transactions and the timing of their completion and, therefore, can fluctuate from period to period.

Claims and other policy benefits decreased by $2.2 million, or 36.3%, and $3.4 million, or 24.0%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decreases in the third quarter and first nine months were attributable to lower lapses on the aforementioned closed treaty in Japan, partially offset by higher claims and policy benefits from new business.

Other operating expenses increased by $1.0 million, or 30.7%, and $1.8 million, or 16.8%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017, respectively. The timing of transactions and the level of costs associated with the entrance into and development of new markets within the segment may cause other operating expenses to fluctuate over periods of time.

Corporate and Other

Corporate and Other revenues primarily include investment income from unallocated invested assets and investment related gains and losses. Corporate and Other expenses consist of the offset to capital charges allocated to the operating segments within the policy acquisition costs and other insurance income line item, unallocated overhead and executive costs, interest expense related to debt, and the investment income and expense associated with the Company’s collateral finance and securitization transactions. Additionally, Corporate and Other includes results from certain wholly-owned subsidiaries, such as RGAx, and joint ventures that, among other activities, develop and market technology, and provide consulting and outsourcing solutions for the insurance and reinsurance industries.

61

(dollars in thousands)	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Revenues:
Net premiums	$	7		$	23		$	27		$	109
Investment income, net of related expenses	51,846			41,108			124,719			108,576
Investment related gains (losses), net	(22,524		)	6,994			(54,739		)	7,856
Other revenues	8,509			1,502			22,886			9,126
Total revenues	37,838			49,627			92,893			125,667
Benefits and expenses:
Claims and other policy benefits	24			(15		)	452			(1		)
Interest credited	3,015			1,799			7,942			4,420
Policy acquisition costs and other insurance income	(30,531		)	(26,848		)	(91,539		)	(80,694		)
Other operating expenses	64,896			45,601			194,126			124,114
Interest expense	33,290			36,836			107,769			108,590
Collateral finance and securitization expense	7,467			7,692			22,509			21,235
Total benefits and expenses	78,161			65,065			241,259			177,664
Income (loss) before income taxes	$	(40,323	)	$	(15,438	)	$	(148,366	)	$	(51,997	)

Loss before income taxes increased by $24.9 million and $96.4 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increases in loss before income taxes for the third quarter and the first nine months are primarily due to decreased net investment related gains and higher other operating expenses partially offset by increased other revenue.

Net investment income increased by $10.7 million, or 26.1%, and $16.1 million, or 14.9%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increases in the third quarter and the first nine months were related to an increase in unallocated invested assets and higher variable investment income.

Net investment related gains (losses) decreased by $29.5 million and $62.6 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The unfavorable change in the third quarter was largely caused by an increase in net losses on the sale of securities of $17.4 million and a $12.4 million increase in impairments on fixed maturity securities and other investments, which was offset by a $3.3 million increase in fair value of equity securities. The decrease in the first nine months was primarily due to net losses on the sale of securities and a $7.7 million decrease in the fair value of equity securities, which was partially offset by an $8.6 million reduction in other-than-temporary impairments on fixed maturity securities and other investments.

Other revenues increased by $7.0 million and $13.8 million for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increase in the third quarter was mainly due to the Company’s January 2018 acquisition of LOGiQ3 Inc., a group of companies providing technology, consulting and outsourcing solutions primarily to the North American life insurance and reinsurance industry, which contributed $5.7 million to other revenues in the current quarter. The acquisition of LOGiQ3 Inc. contributed $15.7 million of other revenues in the first nine months.

Policy acquisition costs and other insurance income increased by $3.7 million, or 13.7%, and $10.8 million, or 13.4%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. Fluctuations period over period were attributable to the offset to capital charges allocated to the operating segments.

Other operating expenses increased by $19.3 million, or 42.3%, and $70.0 million, or 56.4%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The increase in operating expenses, for both periods presented, was primarily related to increased consulting and compensation expenses. The increase in these expenses was due to increased compliance costs, strategic initiatives, acquisitions and increased incentive-based compensation. The aforementioned acquisition of LOGiQ3 Inc. contributed $7.4 million and $21.4 million of other operating expenses in the current quarter and first nine months, respectively.

Interest expense decreased by $3.5 million, or 9.6%, and $0.8 million, or 0.8%, for the three and nine months ended September 30, 2018, as compared to the same periods in 2017. The decrease in interest expense in the third quarter was mainly due to a reduction in tax-related interest expense, and the decrease in the first nine months was mainly the result of the repayment of $300.0 million of long-term debt in 2017.

62

Liquidity and Capital Resources

Overview

The Company believes that cash flows from the source of funds available to it will provide sufficient cash flows for the next twelve months to satisfy the current liquidity requirements of RGA, Inc. and its subsidiaries under various scenarios that include the potential risk of early recapture of reinsurance treaties, market events and higher than expected claims. The Company performs periodic liquidity stress testing to ensure its asset portfolio includes sufficient high quality liquid assets that could be utilized to bolster its liquidity position under stress scenarios. These assets could be utilized as collateral for secured borrowing transactions with various third parties or by selling the securities in the open market if needed. The Company’s liquidity requirements have been and will continue to be funded through net cash flows from operations. However, in the event of significant unanticipated cash requirements beyond normal liquidity needs, the Company has multiple liquidity alternatives available based on market conditions and the amount and timing of the liquidity need. These alternatives include borrowings under committed credit facilities, secured borrowings, the ability to issue long-term debt, preferred securities or common equity and, if necessary, the sale of invested assets subject to market conditions.

Current Market Environment

The current low interest rate environment in select markets, primarily the U.S. and Canada, continues to put downward pressure on the Company’s investment yield. The Company’s average investment yield, excluding spread business, for the nine months ended September 30, 2018 was 4.45%, 16 basis points below the same period in 2017. The Company’s insurance liabilities, in particular its annuity products, are sensitive to changing market factors. Due to increases in risk free interest rates, gross unrealized gains on fixed maturity securities available-for-sale decreased from $2,982.8 million at December 31, 2017 to $1,907.2 million at September 30, 2018. Gross unrealized losses increased from $113.3 million at December 31, 2017 to $653.1 million at September 30, 2018.

The Company continues to be in a position to hold any investment security showing an unrealized loss until recovery, provided it remains comfortable with the credit of the issuer. As indicated above, gross unrealized gains on fixed maturity securities of $1,907.2 million remain well in excess of gross unrealized losses of $653.1 million as of September 30, 2018. The Company does not rely on short-term funding or commercial paper and to date it has experienced no liquidity pressure, nor does it anticipate such pressure in the foreseeable future.

The Company projects its future policy benefits and other insurance liabilities to be sufficient, and it would not expect to write down deferred acquisition costs or be required to take any actions to augment capital, even if interest rates remain at current levels for the next five years, assuming all other factors remain constant. While the Company has felt the pressures of sustained low interest rates and volatile equity markets and may continue to do so, its business operations are not overly sensitive to these risks. Although management believes the Company’s current capital base is adequate to support its business at current operating levels, it continues to monitor new business opportunities and any associated new capital needs that could arise from the changing financial landscape.

The Holding Company

RGA is an insurance holding company whose primary uses of liquidity include, but are not limited to, the immediate capital needs of its operating companies, dividends paid to its shareholders, repurchase of common stock and interest payments on its indebtedness. The primary sources of RGA’s liquidity include proceeds from its capital-raising efforts, interest income on undeployed corporate investments, interest income received on surplus notes with RGA Reinsurance, RCM and Rockwood Re and dividends from operating subsidiaries. As the Company continues its expansion efforts, RGA will continue to be dependent upon these sources of liquidity. The following tables provide comparative information for RGA (dollars in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Interest expense	$	40,924	$	44,697	$	133,618	$	132,018
Capital contributions to subsidiaries	17,850		10,000		40,850		28,500
Dividends to shareholders	38,071		32,271		102,441		85,086
Interest and dividend income	132,035		23,635		396,055		75,916

	September 30, 2018		December 31, 2017
Cash and invested assets	$	498,708	$	779,996

See Item 15, Schedule II - “Condensed Financial Information of the Registrant” in the 2017 Annual Report for additional financial information related to RGA.

63

The undistributed earnings of substantially all of the Company’s foreign subsidiaries have been reinvested indefinitely in those non-U.S. operations, as described in Note 9 - “Income Tax” of the Notes to Consolidated Financial Statements in the 2017 Annual Report. As U.S. Tax Reform generally eliminates U.S. federal income taxes on dividends from foreign subsidiaries, the Company does not expect to incur material income taxes if these funds are repatriated.

RGA endeavors to maintain a capital structure that provides financial and operational flexibility to its subsidiaries, credit ratings that support its competitive position in the financial services marketplace, and shareholder returns. As part of the Company’s capital deployment strategy, it has in recent years repurchased shares of RGA common stock and paid dividends to RGA shareholders, as authorized by the board of directors. RGA’s current share repurchase program, which was approved by the board of directors in January 2017, authorizes the repurchase of up to $400.0 million of common stock. The pace of repurchase activity depends on various factors such as the level of available cash, an evaluation of the costs and benefits associated with alternative uses of excess capital, such as acquisitions and in force reinsurance transactions, and RGA’s stock price.

Details underlying dividend and share repurchase program activity were as follows (in thousands, except share data):

	Nine months ended September 30,
	2018		2017
Dividends to shareholders	$	102,441	$	85,086
Repurchases of treasury stock	258,524		26,897
Total amount paid to shareholders	$	360,965	$	111,983
Number of shares repurchased	1,750,295		208,680
Average price per share	$	147.70	$	128.89

In October 2018, RGA’s board of directors declared a quarterly dividend of $0.60 per share. All future payments of dividends are at the discretion of RGA’s board of directors and will depend on the Company’s earnings, capital requirements, insurance regulatory conditions, operating conditions, and other such factors as the board of directors may deem relevant. The amount of dividends that RGA can pay will depend in part on the operations of its reinsurance subsidiaries. See Note 3 - “Equity” in the Notes to Condensed Consolidated Financial Statements for information on the Company’s share repurchase program.

Debt

Certain of the Company’s debt agreements contain financial covenant restrictions related to, among others, liens, the issuance and disposition of stock of restricted subsidiaries, minimum requirements of consolidated net worth, maximum ratios of debt to capitalization and change of control provisions. The Company’s most restrictive debt agreement requires it to maintain a minimum consolidated net worth, as defined in the debt agreement, of $5.3 billion, calculated as of the last day of each fiscal quarter. Also, consolidated indebtedness, calculated as of the last day of each fiscal quarter, cannot exceed 35% of the sum of the Company’s consolidated indebtedness plus adjusted consolidated stockholders’ equity. A material ongoing covenant default could require immediate payment of the amount due, including principal, under the various agreements. Additionally, the Company’s debt agreements contain cross-default covenants, which would make outstanding borrowings immediately payable in the event of a material uncured covenant default under any of the agreements, including, but not limited to, non-payment of indebtedness when due for an amount in excess of the amounts set forth in those agreements, bankruptcy proceedings, or any other event which results in the acceleration of the maturity of indebtedness.

As of September 30, 2018 and December 31, 2017, the Company had $2.8 billion in outstanding borrowings under its debt agreements and was in compliance with all covenants under those agreements. As of September 30, 2018 and December 31, 2017, the average net interest rate on long-term debt outstanding was 5.24%. The ability of the Company to make debt principal and interest payments depends on the earnings and surplus of subsidiaries, investment earnings on undeployed capital proceeds, available liquidity at the holding company, and the Company’s ability to raise additional funds.

The Company enters into derivative agreements with counterparties that reference either the Company’s debt rating or its financial strength rating. If either rating is downgraded in the future, it could trigger certain terms in the Company’s derivative agreements, which could negatively affect overall liquidity. For the majority of the Company’s derivative agreements, there is a termination event, at the Company’s option, should the long-term senior debt ratings drop below either BBB+ (S&P) or Baa1 (Moody’s) or the financial strength ratings drop below either A- (S&P) or A3 (Moody’s).

The Company may borrow up to $850.0 million in cash and obtain letters of credit in multiple currencies on its revolving credit facility that matures in August 2023. As of September 30, 2018, the Company had no cash borrowings outstanding and $18.3 million in issued, but undrawn, letters of credit under this facility.

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Based on the historic cash flows and the current financial results of the Company, management believes RGA’s cash flows will be sufficient to enable RGA to meet its obligations for at least the next 12 months.

Credit and Committed Facilities

At September 30, 2018, the Company maintained an $850.0 million syndicated revolving credit facility and certain committed letter of credit facilities aggregating $1,256.1 million. See Note 12 - "Financing Activities" in the Notes to Condensed Consolidated Financial Statements and Note 13 - “Debt” in the Notes to Consolidated Financial Statements in the 2017 Annual Report for further information about these facilities.

The Company has obtained bank letters of credit in favor of various affiliated and unaffiliated insurance companies from which the Company assumes business. These letters of credit represent guarantees of performance under the reinsurance agreements and allow ceding companies to take statutory reserve credits. Certain of these letters of credit contain financial covenant restrictions similar to those described in the “Debt” discussion above. At September 30, 2018, there were approximately $94.8 million of outstanding bank letters of credit in favor of third parties. Additionally, in accordance with applicable regulations, the Company utilizes letters of credit to secure statutory reserve credits when it retrocedes business to its affiliated subsidiaries. The Company cedes business to its affiliates to help reduce the amount of regulatory capital required in certain jurisdictions, such as the U.S. and the UK. The Company believes the capital required to support the business in the affiliates reflects more realistic expectations than the original jurisdiction of the business, where capital requirements are often considered to be quite conservative. As of September 30, 2018, $1.4 billion in letters of credit from various banks were outstanding, but undrawn, backing reinsurance between the various subsidiaries of the Company.

Cash Flows

The Company’s principal cash inflows from its reinsurance operations include premiums and deposit funds received from ceding companies. The primary liquidity concerns with respect to these cash flows are early recapture of the reinsurance contract by the ceding company and lapses of annuity products reinsured by the Company. The Company’s principal cash inflows from its invested assets result from investment income and the maturity and sales of invested assets. The primary liquidity concerns with respect to these cash inflows relates to the risk of default by debtors and interest rate volatility. The Company manages these risks very closely. See “Investments” and “Interest Rate Risk” below.

Additional sources of liquidity to meet unexpected cash outflows in excess of operating cash inflows and current cash and equivalents on hand include selling short-term investments or fixed maturity securities and drawing funds under a revolving credit facility, under which the Company had availability of $831.7 million as of September 30, 2018. The Company also has $1.1 billion of funds available through collateralized borrowings from the FHLB as of September 30, 2018. As of September 30, 2018, the Company could have borrowed these additional amounts without violating any of its existing debt covenants.

The Company’s principal cash outflows relate to the payment of claims liabilities, interest credited, operating expenses, income taxes, dividends to shareholders, purchases of treasury stock and principal and interest under debt and other financing obligations. The Company seeks to limit its exposure to loss on any single insured and to recover a portion of benefits paid by ceding reinsurance to other insurance enterprises or reinsurers under excess coverage and coinsurance contracts (See Note 2, “Summary of Significant Accounting Policies” in Notes to Consolidated Financial Statements in the 2017 Annual Report). The Company performs annual financial reviews of its retrocessionaires to evaluate financial stability and performance. The Company has never experienced a material default in connection with retrocession arrangements, nor has it experienced any difficulty in collecting claims recoverable from retrocessionaires; however, no assurance can be given as to the future performance of such retrocessionaires nor to the recoverability of future claims. The Company’s management believes its current sources of liquidity are adequate to meet its cash requirements for the next 12 months.

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Summary of Primary Sources and Uses of Liquidity and Capital

The Company’s primary sources and uses of liquidity and capital are summarized as follows:

		For the nine months ended September 30,
		2018		2017
		(Dollars in thousands)
Sources:
	Net cash provided by operating activities	$	1,100,163	$	1,104,499
	Net cash provided by investing activities	31,012		—
	Exercise of stock options, net	2,336		4,450
	Cash provided by changes in universal life and other
	investment type policies and contracts	—		438,774
	Effect of exchange rate changes on cash	—		43,699
	Total sources	1,133,511		1,591,422
Uses:
	Net cash used in investing activities	—		1,056,334
	Dividends to stockholders	102,441		85,086
	Repayment of collateral finance and securitization notes	75,146		56,637
	Principal payments of long-term debt	2,007		301,927
	Purchases of treasury stock	273,873		41,360
	Change in cash collateral for derivatives and other arrangements	21,288		46,206
	Cash used for changes in universal life and other
	investment type policies and contracts	199,778		—
	Effect of exchange rate changes on cash	32,013		—
	Total uses	706,546		1,587,550
Net change in cash and cash equivalents		$	426,965	$	3,872

Cash Flows from Operations - The principal cash inflows from the Company’s reinsurance activities come from premiums, investment and fee income, annuity considerations and deposit funds. The principal cash outflows relate to the liabilities associated with various life and health insurance, annuity and disability products, operating expenses, income tax payments and interest on outstanding debt obligations. The primary liquidity concern with respect to these cash flows is the risk of shortfalls in premiums and investment income, particularly in periods with abnormally high claims levels.

Cash Flows from Investments - The principal cash inflows from the Company’s investment activities come from repayments of principal on invested assets, proceeds from maturities of invested assets, sales of invested assets and settlements of freestanding derivatives. The principal cash outflows relate to purchases of investments, issuances of policy loans and settlements of freestanding derivatives. The Company typically has a net cash outflow from investing activities because cash inflows from insurance operations are reinvested in accordance with its asset/liability management discipline to fund insurance liabilities. The Company closely monitors and manages these risks through its credit risk management process. The primary liquidity concerns with respect to these cash flows are the risk of default by debtors and market disruption, which could make it difficult for the Company to sell investments.

Financing Cash Flows - The principal cash inflows from the Company’s financing activities come from issuances of RGA debt and equity securities, and deposit funds associated with universal life and other investment type policies and contracts. The principal cash outflows come from repayments of debt, payments of dividends to stockholders, purchases of treasury stock, and withdrawals associated with universal life and other investment type policies and contracts. A primary liquidity concern with respect to these cash flows is the risk of early contractholder and policyholder withdrawal.

Contractual Obligations

There were no material changes in the Company’s contractual obligations from those previously reported in the 2017 Annual Report.

Asset / Liability Management

The Company actively manages its cash and invested assets using an approach that is intended to balance quality, diversification, asset/liability matching, liquidity and investment return. The goals of the investment process are to optimize after-tax, risk-adjusted investment income and after-tax, risk-adjusted total return while managing the assets and liabilities on a cash flow and duration basis.

The Company has established target asset portfolios for its operating segments, which represent the investment strategies intended to profitably fund its liabilities within acceptable risk parameters. These strategies include objectives and limits for effective duration, yield curve sensitivity and convexity, liquidity, asset sector concentration and credit quality.

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The Company’s asset-intensive products are primarily supported by investments in fixed maturity securities reflected on the Company’s balance sheet and under funds withheld arrangements with the ceding company. Investment guidelines are established to structure the investment portfolio based upon the type, duration and behavior of products in the liability portfolio so as to achieve targeted levels of profitability. The Company manages the asset-intensive business to provide a targeted spread between the interest rate earned on investments and the interest rate credited to the underlying interest-sensitive contract liabilities. The Company periodically reviews models projecting different interest rate scenarios and their effect on profitability. Certain of these asset-intensive agreements, primarily in the U.S. and Latin America Financial Solutions operating segment, are generally funded by fixed maturity securities that are withheld by the ceding company.

The Company’s liquidity position (cash and cash equivalents and short-term investments) was $1,960.4 million and $1,396.8 million at September 30, 2018 and December 31, 2017, respectively. Cash and cash equivalents includes cash collateral received from derivative counterparties of $159.2 million and $185.9 million as of September 30, 2018 and December 31, 2017, respectively. This unrestricted cash collateral is included in cash and cash equivalents and the obligation to return it is included in other liabilities in the Company’s condensed consolidated balance sheets. Liquidity needs are determined from valuation analyses conducted by operational units and are driven by product portfolios. Periodic evaluations of demand liabilities and short-term liquid assets are designed to adjust specific portfolios, as well as their durations and maturities, in response to anticipated liquidity needs.

See “Securities Borrowing, Lending and Other” in Note 4 - “Investments” in the Notes to Condensed Consolidated Financial Statements for information related to the Company’s securities borrowing, lending and repurchase/reverse repurchase programs. In addition to its security agreements with third parties, certain RGA’s subsidiaries have entered into intercompany securities lending agreements to more efficiently source securities for lending to third parties and to provide for more efficient regulatory capital management.

The Company is a member of the FHLB and holds $71.4 million of FHLB common stock, which is included in other invested assets on the Company’s condensed consolidated balance sheets. Membership provides the Company access to borrowing arrangements (“advances”) and funding agreements, discussed below, with the FHLB. The Company did not have any advances from the FHLB at September 30, 2018 and December 31, 2017. The Company had no advances during the third quarter and the first nine months of 2018 and had average outstanding balances for advances of $8.2 million and $17.0 million during the third quarter and the first nine months of 2017, respectively. Interest on advances is reflected in interest expense on the Company’s condensed consolidated statements of income.

In addition, the Company has also entered into funding agreements with the FHLB under guaranteed investment contracts whereby the Company has issued the funding agreements in exchange for cash and for which the FHLB has been granted a blanket lien on the Company’s commercial and residential mortgage-backed securities and commercial mortgage loans used to collateralize the Company’s obligations under the funding agreements. The Company maintains control over these pledged assets, and may use, commingle, encumber or dispose of any portion of the collateral as long as there is no event of default and the remaining qualified collateral is sufficient to satisfy the collateral maintenance level. The funding agreements and the related security agreements represented by this blanket lien provide that upon any event of default by the Company, the FHLB’s recovery is limited to the amount of the Company’s liability under the outstanding funding agreements. The amount of the Company’s liability for the funding agreements with the FHLB under guaranteed investment contracts was $1.4 billion at September 30, 2018 and December 31, 2017, respectively, which is included in interest sensitive contract liabilities on the Company’s condensed consolidated balance sheets. The advances on these agreements are collateralized primarily by commercial and residential mortgage-backed securities, commercial mortgage loans, and U.S. Treasury and government agency securities. The amount of collateral exceeds the liability and is dependent on the type of assets collateralizing the guaranteed investment contracts.

Investments

Management of Investments

The Company’s investment and derivative strategies involve matching the characteristics of its reinsurance products and other obligations and to seek to closely approximate the interest rate sensitivity of the assets with estimated interest rate sensitivity of the reinsurance liabilities. The Company achieves its income objectives through strategic and tactical asset allocations, security and derivative strategies within an asset/liability management and disciplined risk management framework. Derivative strategies are employed within the Company’s risk management framework to help manage duration, currency, and other risks in assets and/or liabilities and to replicate the credit characteristics of certain assets. For a discussion of the Company’s risk management process see “Market and Credit Risk” in the “Enterprise Risk Management” section below.

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The Company’s portfolio management groups work with the Enterprise Risk Management function to develop the investment policies for the assets of the Company’s domestic and international investment portfolios. All investments held by the Company, directly or in a funds withheld at interest reinsurance arrangement, are monitored for conformance with the Company’s stated investment policy limits as well as any limits prescribed by the applicable jurisdiction’s insurance laws and regulations. See Note 4 – “Investments” in the Notes to Condensed Consolidated Financial Statements for additional information regarding the Company’s investments.

Portfolio Composition

The Company had total cash and invested assets of $54.8 billion and $53.0 billion at September 30, 2018 and December 31, 2017, respectively, as illustrated below (dollars in thousands):

	September 30, 2018		% of Total		December 31, 2017		% of Total
Fixed maturity securities, available-for-sale	$	39,005,212	71.1	%	$	38,150,820	71.9	%
Equity securities	101,069		0.2		100,152		0.2
Mortgage loans on real estate	4,779,074		8.7		4,400,533		8.3
Policy loans	1,320,050		2.4		1,357,624		2.6
Funds withheld at interest	5,976,301		10.9		6,083,388		11.5
Short-term investments	229,928		0.4		93,304		0.2
Other invested assets	1,706,979		3.1		1,505,332		2.8
Cash and cash equivalents	1,730,489		3.2		1,303,524		2.5
Total cash and invested assets	$	54,849,102	100.0	%	$	52,994,677	100.0	%

Investment Yield

The following table presents consolidated average invested assets at amortized cost, net investment income and investment yield, excluding spread related business. Spread related business is primarily associated with contracts on which the Company earns an interest rate spread between assets and liabilities. To varying degrees, fluctuations in the yield on other spread related business is generally subject to corresponding adjustments to the interest credited on the liabilities (dollars in thousands).

	Three months ended September 30,								Nine months ended September 30,
	2018			2017			Increase/     (Decrease)		2018			2017			Increase/     (Decrease)
Average invested assets at amortized cost	$	27,029,073		$	25,887,338		4.4	%	$	26,689,086		$	25,136,119		6.2	%
Net investment income	303,860			305,632			(0.6	)%	886,165			863,724			2.6	%
Investment yield (ratio of net investment income to average invested assets)	4.57		%	4.81		%	(24 bps)		4.45		%	4.61		%	(16 bps)

Investment yield decreased for the three months and nine months ended September 30, 2018 in comparison to the same periods in the prior year primarily due to decreased income from joint venture investments, which is included in other invested assets on the condensed consolidated balance sheets, and the effect of the low interest rate environment.

Fixed Maturity and Equity Securities Available-for-Sale

See “Fixed Maturity and Equity Securities Available-for-Sale” in Note 4 – “Investments” in the Notes to Condensed Consolidated Financial Statements for tables that provide the amortized cost, unrealized gains and losses, estimated fair value of these securities, and the other-than-temporary impairments in AOCI by sector as of September 30, 2018 and December 31, 2017.

The Company holds various types of fixed maturity securities available-for-sale and classifies them as corporate securities (“Corporate”), Canadian and Canadian provincial government securities (“Canadian government”), residential mortgage-backed securities (“RMBS”), asset-backed securities (“ABS”), commercial mortgage-backed securities (“CMBS”), U.S. government and agencies (“U.S. government”), state and political subdivisions, and other foreign government, supranational and foreign government-sponsored enterprises (“Other foreign government”). As of September 30, 2018 and December 31, 2017, approximately 95.8% and 95.6%, respectively, of the Company’s consolidated investment portfolio of fixed maturity securities were investment grade.

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Important factors in the selection of investments include diversification, quality, yield, call protection and total rate of return potential. The relative importance of these factors is determined by market conditions and the underlying reinsurance liability and existing portfolio characteristics. The largest asset class in which fixed maturity securities were invested was corporate securities, which represented approximately 62.7% and 60.9% of total fixed maturity securities as of September 30, 2018 and December 31, 2017, respectively. See “Corporate Fixed Maturity Securities” in Note 4 – “Investments” in the Notes to Condensed Consolidated Financial Statements for tables showing the major industry types, which comprise the corporate fixed maturity holdings at September 30, 2018 and December 31, 2017.

As of September 30, 2018, the Company’s investments in Canadian and Canadian provincial government securities represented 10.3% of the fair value of total fixed maturity securities compared to 11.1% of the fair value of total fixed maturity securities at December 31, 2017. These assets are primarily high quality, long duration provincial strips, the valuation of which is closely linked to the interest rate curve. These assets are longer in duration and held primarily for asset/liability management to meet Canadian regulatory requirements. See “Fixed Maturity and Equity Securities Available-for-Sale” in Note 4 – “Investments” in the Notes to Condensed Consolidated Financial Statements for tables showing the various sectors as of September 30, 2018 and December 31, 2017.

The Company references rating agency designations in some of its investments disclosures. These designations are based on the ratings from nationally recognized statistical rating organizations, primarily Moody’s, S&P and Fitch. Structured securities (mortgage-backed and asset-backed securities) held by the Company’s insurance subsidiaries that maintain the NAIC statutory basis of accounting utilize the NAIC rating methodology. The NAIC assigns designations to publicly traded as well as privately placed securities. The designations assigned by the NAIC range from class 1 to class 6, with designations in classes 1 and 2 generally considered investment grade (BBB or higher rating agency designation). NAIC designations in classes 3 through 6 are generally considered below investment grade (BB or lower rating agency designation).

The quality of the Company’s available-for-sale fixed maturity securities portfolio, as measured at fair value and by the percentage of fixed maturity securities invested in various ratings categories, relative to the entire available-for-sale fixed maturity security portfolio, at September 30, 2018 and December 31, 2017 was as follows (dollars in thousands):

		September 30, 2018						December 31, 2017
NAIC   Designation	Rating Agency Designation	Amortized Cost		Estimated Fair Value		% of Total		Amortized Cost		Estimated      Fair  Value		% of Total
1	AAA/AA/A	$	24,627,894	$	25,837,847	66.2	%	$	23,534,574	$	25,762,103	67.5	%
2	BBB	11,466,201		11,526,902		29.6		10,115,008		10,709,170		28.1
3	BB	1,187,035		1,168,627		3.0		1,139,200		1,173,639		3.1
4	B	425,572		424,040		1.1		408,990		420,284		1.1
5	CCC and lower	27,341		30,106		0.1		78,143		79,747		0.2
6	In or near default	17,089		17,690		—		5,497		5,877		—
	Total	$	37,751,132	$	39,005,212	100.0	%	$	35,281,412	$	38,150,820	100.0	%

The Company’s fixed maturity portfolio includes structured securities. The following table shows the types of structured securities the Company held at September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018				December 31, 2017
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
RMBS:
Agency	$	813,762	$	795,873	$	878,559	$	896,977
Non-agency	1,003,187		984,889		816,567		822,903
Total RMBS	1,816,949		1,780,762		1,695,126		1,719,880
CMBS	1,282,015		1,273,534		1,285,594		1,303,387
ABS	1,867,650		1,863,017		1,634,758		1,648,362
Total	$	4,966,614	$	4,917,313	$	4,615,478	$	4,671,629

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The Company’s RMBS include agency-issued pass-through securities and collateralized mortgage obligations. A majority of the agency-issued pass-through securities are guaranteed or otherwise supported by the Federal Home Loan Mortgage Corporation, Federal National Mortgage Association, or the Government National Mortgage Association. The principal risks inherent in holding mortgage-backed securities are prepayment and extension risks, which will affect the timing of when cash will be received and are dependent on the level of mortgage interest rates. Prepayment risk is the unexpected increase in principal payments from the expected, primarily as a result of owner refinancing. Extension risk relates to the unexpected slowdown in principal payments from the expected. In addition, non-agency mortgage-backed securities face credit risk should the borrower be unable to pay the contractual interest or principal on their obligation. The Company monitors its mortgage-backed securities to mitigate exposure to the cash flow uncertainties associated with these risks.

The Company’s ABS include credit card receivables, railcar leasing, student loans, single-family rentals, home equity loans and collateralized debt obligations (primarily collateralized loan obligations). The Company owns floating rate securities that represent approximately 15.2% and 13.8% of the total fixed maturity securities at September 30, 2018 and December 31, 2017, respectively. These investments have a higher degree of income variability than the other fixed income holdings in the portfolio due to the floating rate nature of the interest payments. The Company holds these investments to match specific floating rate liabilities primarily reflected in the condensed consolidated balance sheets as collateral finance notes, as well as to enhance asset management strategies. In addition to the risks associated with floating rate securities, principal risks in holding asset-backed securities are structural, credit and capital market risks. Structural risks include the securities’ cash flow priority in the capital structure and the inherent prepayment sensitivity of the underlying collateral. Credit risks include the adequacy and ability to realize proceeds from the collateral. Credit risks are mitigated by credit enhancements which include excess spread, over-collateralization and subordination. Capital market risks include general level of interest rates and the liquidity for these securities in the marketplace.

The Company monitors its fixed maturity securities to determine impairments in value and evaluates factors such as financial condition of the issuer, payment performance, the length of time and the extent to which the market value has been below amortized cost, compliance with covenants, general market and industry sector conditions, current intent and ability to hold securities, and various other subjective factors. Based on management’s judgment, securities determined to have an other-than-temporary impairment in value are written down to fair value. See “Investments – Other-than-Temporary Impairment” in Note 2 – “Summary of Significant Accounting Policies” in the Notes to Consolidated Financial Statements in the 2017 Annual Report for additional information. The table below summarizes other-than-temporary impairments and changes in the mortgage loan provision for the three and nine months ended September 30, 2018 and 2017 (dollars in thousands).

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Impairment losses on available-for-sale securities
Fixed maturity securities	$	10,705	$	390	$	14,055	$	20,980
Equity securities	—		889		—		889
Other impairment losses	5,910		1,469		7,249		7,776
Change in mortgage loan provision	656		977		986		1,444
Total	$	17,271	$	3,725	$	22,290	$	31,089

The fixed maturity impairments for the three and nine months ended September 30, 2018 and 2017 were largely related to high-yield corporate securities. The equity impairments for the three and nine months ended September 30, 2017 were related to an equity position received as part of a debt restructuring. In addition, other impairment losses for the three and nine months ended September 30, 2018 were primarily due to impairments on real estate joint ventures and limited partnerships. Other impairment losses for the three and nine months ended September 30, 2017 were primarily due to impairments on limited partnerships.

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At September 30, 2018 and December 31, 2017, the Company had $653.1 million and $113.3 million, respectively, of gross unrealized losses related to its fixed maturity securities. The distribution of the gross unrealized losses related to these securities is shown below.

	September 30, 2018		December 31, 2017
Sector:
Corporate	63.8	%	48.8	%
Canadian government	0.6		1.5
RMBS	7.7		10.5
ABS	2.3		4.6
CMBS	2.6		4.3
U.S. government	14.5		19.4
State and political subdivisions	2.1		3.8
Other foreign government	6.4		7.1
Total	100.0	%	100.0	%
Industry:
Finance	24.0	%	15.8	%
Asset-backed	2.3		4.6
Industrial	32.6		30.0
Mortgage-backed	10.3		14.8
Government	23.6		31.8
Utility	7.2		3.0
Total	100.0	%	100.0	%

See “Unrealized Losses for Fixed Maturity and Equity Securities Available-for-Sale” in Note 4 – “Investments” in the Notes to Condensed Consolidated Financial Statements for a table that presents the total gross unrealized losses for these securities at September 30, 2018 and December 31, 2017, respectively, where the estimated fair value had declined and remained below amortized cost by less than 20% or more than 20%.

The Company’s determination of whether a decline in value is other-than-temporary includes analysis of the underlying credit and the extent and duration of a decline in value. The Company’s credit analysis of an investment includes determining whether the issuer is current on its contractual payments, evaluating whether it is probable that the Company will be able to collect all amounts due according to the contractual terms of the security and analyzing the overall ability of the Company to recover the amortized cost of the investment. In the Company’s impairment review process, the duration and severity of an unrealized loss position for equity securities are given greater weight and consideration given the lack of contractual cash flows and the deferability features of these securities.

See “Unrealized Losses for Fixed Maturity and Equity Securities Available-for-Sale” in Note 4 – “Investments” in the Notes to Condensed Consolidated Financial Statements for tables that present the estimated fair values and gross unrealized losses, including other-than-temporary impairment losses reported in AOCI, for these securities that have estimated fair values below amortized cost, by class and grade security, as well as the length of time the related market value has remained below amortized cost as of September 30, 2018 and December 31, 2017.

As of September 30, 2018 and December 31, 2017, the Company classified approximately 4.9% and 5.9%, respectively, of its fixed maturity securities in the Level 3 category (refer to Note 6 – “Fair Value of Assets and Liabilities” in the Notes to Condensed Consolidated Financial Statements for additional information). These securities primarily consist of private placement corporate securities, bank loans, and Canadian provincial strips with inactive trading markets.

See “Securities Borrowing, Lending and Other” in Note 4 - “Investments” in the Notes to Condensed Consolidated Financial Statements for information related to the Company’s securities borrowing, repurchase and repurchase/reverse repurchase programs.

Mortgage Loans on Real Estate

Mortgage loans represented approximately 8.7% and 8.3% of the Company’s cash and invested assets as of September 30, 2018 and December 31, 2017, respectively. The Company’s mortgage loan portfolio consists of U.S. and Canadian based investments primarily in commercial offices, light industrial properties and retail locations. The mortgage loan portfolio is diversified by geographic region and property type. Additional information on geographic concentration and property type can be found under “Mortgage Loans on Real Estate” in Note 4 – “Investments” in the Notes to Condensed Consolidated Financial Statements.

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As of September 30, 2018 and December 31, 2017, the Company’s mortgage loans, gross of unamortized deferred loan origination fees and expenses and valuation allowances, were distributed geographically as follows (dollars in thousands):

	September 30, 2018				December 31, 2017
	Recorded Investment		% of Total		Recorded Investment		% of Total
U.S. Region:
Pacific	$	1,342,410	27.9	%	$	1,258,753	28.6	%
South Atlantic	962,752		20.1		896,117		20.3
Mountain	678,604		14.2		694,324		15.7
East North Central	579,162		12.1		527,316		11.9
West North Central	302,538		6.3		309,326		7.0
West South Central	502,670		10.5		387,151		8.8
Middle Atlantic	170,974		3.6		137,600		3.1
East South Central	124,447		2.6		96,887		2.2
New England	5,637		0.1		5,700		0.1
Subtotal - U.S.	4,669,194		97.4		4,313,174		97.7
Canada	125,032		2.6		99,997		2.3
Total	$	4,794,226	100.0	%	$	4,413,171	100.0	%

Valuation allowances on mortgage loans are established based upon inherent losses expected by management to be realized in connection with future dispositions or settlement of mortgage loans, including foreclosures. The valuation allowances are established after management considers, among other things, the value of underlying collateral and payment capabilities of debtors. Any subsequent adjustments to the valuation allowances will be treated as investment gains or losses. See “Mortgage Loans on Real Estate” in Note 4 – “Investments” in the Notes to Condensed Consolidated Financial Statements for information regarding valuation allowances and impairments.

Policy Loans

Policy loans comprised approximately 2.4% and 2.6% of the Company’s cash and invested assets as of September 30, 2018 and December 31, 2017, respectively, the majority of which are associated with one client. These policy loans present no credit risk because the amount of the loan cannot exceed the obligation due the ceding company upon the death of the insured or surrender of the underlying policy. The provisions of the treaties in force and the underlying policies determine the policy loan interest rates. The Company earns a spread between the interest rate earned on policy loans and the interest rate credited to corresponding liabilities.

Funds Withheld at Interest

Funds withheld at interest comprised approximately 10.9% and 11.5% of the Company’s cash and invested assets as of September 30, 2018 and December 31, 2017, respectively. For reinsurance agreements written on a modified coinsurance basis and certain agreements written on a coinsurance basis, assets equal to the net statutory reserves are withheld and legally owned and managed by the ceding company, and are reflected as funds withheld at interest on the Company’s condensed consolidated balance sheets. In the event of a ceding company’s insolvency, the Company would need to assert a claim on the assets supporting its reserve liabilities. However, the risk of loss to the Company is mitigated by its ability to offset amounts it owes the ceding company for claims or allowances against amounts owed by the ceding company. Interest accrues to the total funds withheld at interest assets at rates defined by the treaty terms. The Company is subject to the investment performance on the withheld assets, although it does not directly control them. These assets are primarily fixed maturity investment securities and pose risks similar to the fixed maturity securities the Company owns. To mitigate this risk, the Company helps set the investment guidelines followed by the ceding company and monitors compliance. Ceding companies with funds withheld at interest had an average financial strength rating of “A” at September 30, 2018 and December 31, 2017. Certain ceding companies maintain segregated portfolios for the benefit of the Company.

Other Invested Assets

Other invested assets include limited partnership interests, joint ventures (other than operating joint ventures), equity release mortgages, derivative contracts, FVO contractholder-directed unit-linked investments and FHLB common stock. Other invested assets represented approximately 3.1% and 2.8% of the Company’s cash and invested assets as of September 30, 2018 and December 31, 2017, respectively. See “Other Invested Assets” in Note 4 – “Investments” in the Notes to Condensed Consolidated Financial Statements for a table that presents the carrying value of the Company’s other invested assets by type as of September 30, 2018 and December 31, 2017.

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The Company utilizes derivative financial instruments to protect the Company against possible changes in the fair value of its investment portfolio as a result of interest rate changes, to hedge against risk of changes in the purchase price of securities, to hedge liabilities associated with the reinsurance of variable annuities with guaranteed living benefits and to manage the portfolio’s effective yield, maturity and duration. In addition, the Company utilizes derivative financial instruments to reduce the risk associated with fluctuations in foreign currency exchange rates. The Company uses both exchange-traded, centrally cleared, and customized over-the-counter derivative financial instruments.

See Note 5 - “Derivative Instruments” in the Notes to Condensed Consolidated Financial Statements for a table that presents the notional amounts and fair value of investment related derivative instruments held at September 30, 2018 and December 31, 2017.

The Company may be exposed to credit-related losses in the event of non-performance by counterparties to derivative financial instruments. Generally, the credit exposure of the Company’s derivative contracts is limited to the fair value at the reporting date plus or minus any collateral posted or held by the Company. The Company had no net credit exposure related to its derivative contracts, excluding futures and mortality swaps, at September 30, 2018 and December 31, 2017, as the net amount of collateral pledged to the Company from counterparties exceeded the fair value of the derivative contracts.

The Company manages its credit risk related to over-the-counter derivatives by entering into transactions with creditworthy counterparties, maintaining collateral arrangements and through the use of master agreements that provide for a single net payment to be made by one counterparty to another at each due date and upon termination. As exchange-traded futures are affected through regulated exchanges, and positions are marked to market on a daily basis, the Company has minimal exposure to credit-related losses in the event of nonperformance by counterparties. See Note 5 - “Derivative Instruments” in the Notes to Condensed Consolidated Financial Statements for more information regarding the Company’s derivative instruments.

Enterprise Risk Management

RGA maintains a dedicated Enterprise Risk Management (“ERM”) function that is responsible for analyzing and reporting the Company’s risks on an aggregated basis; facilitating monitoring to ensure the Company’s risks remain within its appetites and limits; and ensuring, on an ongoing basis, that RGA’s ERM objectives are met. This includes ensuring proper risk controls are in place; risks are effectively identified, assessed, and managed; and key risks to which the Company is exposed are disclosed to appropriate stakeholders. The ERM function plays an important role in fostering the Company’s risk management culture and practices.

Enterprise Risk Management Structure and Governance

The Board of Directors (“the Board”) oversees enterprise risk through its standing committees. The Finance, Investments, and Risk Management (“FIRM”) Committee of the Board oversees the management of the Company’s ERM program and policies. The FIRM receives regular reports and assessments which describe the Company’s key risk exposures and include quantitative and qualitative assessments and information about breaches, exceptions, and waivers.

The Company’s Global Chief Risk Officer (“CRO”) leads the dedicated ERM function. The CRO reports to the Chief Executive Officer (“CEO”) and has direct access to the Board through the FIRM Committee with formal reporting occurring quarterly. The CRO is supported by a network of Business Unit Chief Risk Officers and Risk Management Officers throughout the business who are responsible for the analysis and management of risks within their scope. A Lead Risk Management Officer is assigned to each risk to take overall responsibility to monitor and assess the risk consistently across all markets.

In addition to leading the ERM function, the CRO also chairs the Company’s Risk Management Steering Committee (“RMSC”), which is made up of senior management executives, including the CEO, the Chief Financial Officer (“CFO”), and the Chief Operating Officer, among others. The RMSC provides oversight for the Insurance, Market and Credit, Capital, and Operational risk committees and retains direct risk oversight responsibilities for the following:

• Company’s global ERM framework, activities, and issues.

• Identification, assessments, and management of all known, new and emerging strategic risk exposures.

• Risk appetite statement, including the ongoing alignment of the risk appetite statement with the Company’s strategy and capital plans.

• Review, revise and approve RGA group-level strategic risk limits consistent with the risk appetite statement

The Insurance, Market and Credit, Capital, and Operational risk committees have direct oversight accountability for their respective risks areas including the identification, assessments, and management of known, new and emerging risk exposures and the review and approval of RGA group-level risk limits

To ensure appropriate oversight of enterprise-wide risk management issues without unnecessary duplication, as well as to foster cross-committee communication and coordination regarding risk issues, risk committee chairs attend RMSC meetings. In addition

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to the risk committees, their sub-committees and working groups, some RGA operating entities have risk management committees that oversee relevant risks related to segment-level risk limits.

Enterprise Risk Management Framework

RGA’s ERM framework provides a platform to assess the risk / return profiles of risks throughout the organization to enable enhanced decision making by business leaders. The ERM framework also guides the development and implementation of mitigation strategies to reduce exposures to these risks to acceptable levels.

RGA’s ERM framework includes the following elements:

1. Risk Culture: Risk management is an integral part of the Company’s culture and is embedded in RGA’s business processes in accordance with RGA’s risk philosophy. As the cornerstone of the ERM framework, a culture of prudent risk management reinforced by senior management plays a preeminent role in the effective management of risks assumed by RGA.

2. Risk Appetite Statement: A general and high level overview of the risk profile RGA aims to achieve to meet its strategic objectives. This statement is then supported by more granular risk limits guiding the businesses to achieve this Risk Appetite Statement.

3. Risk Limits: Risk Limits establish the maximum amount of defined risk that the Company is willing to assume to remain within the Company’s overall risk appetite. These risks have been identified by the management of the Company as relevant to manage the overall risk profile of the Company while allowing achievement of strategic objectives.

4. Risk Assessment Process: RGA uses qualitative and quantitative methods to assess key risks through a portfolio approach, which analyzes established and emerging risks in conjunction with other risks.

5. Business Specific Limits/Controls: These limits/controls provide additional safeguards against undesired risk exposures and are embedded in business processes. Examples include maximum retention limits, pricing and underwriting reviews, per issuer limits, concentration limits, and standard treaty language.

Proactive risk monitoring and reporting enable early detection and mitigation of emerging risks. The RMSC and its subcommittees monitor adherence to risk limits through the ERM function, which reports regularly to the RMSC and FIRM Committee. The frequency of monitoring is tailored to the volatility assessment and relative priority of each risk. Risk escalation channels coupled with open communication lines enhance the mitigants explained above. The Company has devoted significant resources to developing its ERM program and expects to continue to do so in the future. Nonetheless, the Company’s policies and procedures to identify, manage, and monitor risks may not be fully effective. Many of the Company’s methods for managing risk are based on historical information, which may not be a good predictor of future risk exposures, such as the risk of a pandemic causing a large number of deaths. Management of operational, legal, and regulatory risk relies on policies and procedures which may not be fully effective under all scenarios.

Risk Categories

The Company groups its risks into the following categories: Insurance risk, Market and Credit risk, Capital risk, Operational risk and Strategic risk. Specific risk assessments and descriptions can be found below and in Item 1A – “Risk Factors” of the 2017 Annual Report.

Insurance Risk

Insurance risk is the risk of lower or negative earnings and potentially a reduction in enterprise value due to a greater amount of benefits and related expenses paid than expected, or from non-market related adverse policyholder or client behavior. The Company uses multiple approaches to managing insurance risk: active insurance risk assessment and pricing appropriately for the risks assumed, transferring undesired risks, and managing the retained exposure prudently. These strategies are explained below.

Insurance Risk Assessment and Pricing

The Company has developed extensive expertise in assessing insurance risks which ultimately forms an integral part of ensuring that it is compensated commensurately for the risks it assumes and that it does not overpay for the risks it transfers to third parties. This expertise includes a vast array of market and product knowledge supported by a large information database of historical experience which is closely monitored. Analysis and experience studies derived from this database help form the basis for the Company’s pricing assumptions which are used in developing rates for new risks. If actual mortality or morbidity experience is materially adverse, some reinsurance treaties allow for increases to future premium rates.

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Misestimation of any key risk can threaten the long term viability of the enterprise. Further, the pricing process is a key operational risk and significant effort is applied to ensuring the appropriateness of pricing assumptions. Some of the safeguards the Company uses to ensure proper pricing are: experience studies, strict underwriting, sensitivity and scenario testing, pricing guidelines and controls, authority limits and internal and external pricing reviews. In addition, the ERM function provides pricing oversight which includes periodic pricing audits.

Risk Transfer

To minimize volatility in financial results and reduce the impact of large losses, the Company transfers some of its insurance risk to third parties using vehicles such as retrocession and catastrophe coverage.

Individual Exposure Retrocession

In the normal course of business, the Company seeks to limit its exposure to loss on any single insured and to recover a portion of claims paid by ceding reinsurance to other insurance enterprises (or retrocessionaires) under excess coverage and coinsurance contracts. In individual life markets, the Company retains a maximum of $8.0 million of coverage per individual life. In certain limited situations the Company has retained more than $8.0 million per individual life. The Company enters into agreements with other reinsurers to mitigate the residual risk related to the over-retained policies. Additionally, due to some lower face amount reinsurance coverages provided by the Company in addition to individual life, such as group life, disability and health, under certain circumstances, the Company could potentially incur claims totaling more than $8.0 million per individual life.

Catastrophic Excess Loss Retrocession

The Company seeks to limit its exposure to loss on its assumed catastrophic excess of loss reinsurance agreements by ceding a portion of its exposure to multiple retrocessionaires through retrocession line slips or directly to retrocession markets. The Company’s policy is to retain a maximum of $20.0 million of catastrophic loss exposure per agreement and to retrocede up to $30.0 million additional loss exposures to the retrocession markets. The Company limits its exposure on a country-by-country (and state-by-state in the U.S.) basis by managing its total exposure to all catastrophic excess of loss agreements bound within a given country to established maximum aggregate exposures. The maximum exposures are established and managed both on gross amounts issued prior to including retrocession and for amounts net of exposures retroceded.

Catastrophe Coverage

The Company accesses the markets each year for annual catastrophic coverages and reviews current coverage and pricing of current and alternate designs. The coverage may vary from year to year based on the Company’s perceived value of such protection. The current policy covers events involving 8 or more insured deaths from a single occurrence and covers $100.0 million of claims in excess of the Company’s $25.0 million deductible.

Managing Retained Exposure

The Company retains most of the inbound insurance risk. The Company manages the retained exposure proactively using various mitigating factors such as diversification and limits. Diversification is the primary mitigating factor of short term volatility risk, but it also mitigates adverse impacts of changes in long term trends and catastrophic events. The Company’s insured populations are dispersed globally, diversifying the insurance exposure because factors that cause actual experience to deviate materially from expectations do not affect all areas uniformly and synchronously or in close sequence. A variety of limits mitigate retained insurance risk. Examples of these limits include geographic exposure limits, which set the maximum amount of business that can be written in a given country, and jumbo limits, which prevent excessive coverage on a given individual.

In the event that mortality or morbidity experience develops in excess of expectations, some reinsurance treaties allow for increases to future premium rates. Other treaties include experience refund provisions, which may also help reduce RGA’s mortality risk.

RGA has various methods to manage its insurance risks, including access to the capital and reinsurance markets.

Market and Credit Risk

Market and Credit risk is the risk of lower or negative earnings and potentially a reduction in enterprise value due to changes in the market prices of asset and liabilities.

Interest Rate Risk

Interest Rate risk is risk that changes in the level and volatility of nominal interest rates affect the profitability, value or solvency position of the Company. This includes credit spread changes and inflation but excludes credit quality deterioration. This risk arises from many of the Company’s primary activities, as the Company invests substantial funds in interest-sensitive assets, primarily fixed maturity securities, and also has certain interest-sensitive contract liabilities. A prolonged period where market yields are significantly below the book yields of the Company’s asset portfolio puts downward pressure on portfolio book yields.

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The Company has been proactive in its investment strategies, reinsurance structures and overall asset-liability management practices to reduce the risk of unfavorable consequences in this type of environment.

The Company manages interest rate risk to optimize the return on the Company’s capital and to preserve the value created by its business operations within certain constraints. For example, certain management and monitoring processes are designed to minimize the effect of sudden and/or sustained changes in interest rates on fair value, cash flows, and net interest income. The Company manages its exposure to interest rates principally by managing the relative matching of the cash flows of its liabilities and assets.

The Company’s exposure to interest rate price risk and interest rate cash flow risk is reviewed on a quarterly basis. Interest rate price risk exposure is measured using interest rate sensitivity analysis to determine the change in fair value of the Company’s financial instruments in the event of a hypothetical change in interest rates. Interest rate cash flow risk exposure is measured using interest rate sensitivity analysis to determine the Company’s variability in cash flows in the event of a hypothetical change in interest rates.

In order to reduce the exposure to changes in fair values from interest rate fluctuations, the Company has developed strategies to manage the net interest rate sensitivity of its assets and liabilities. In addition, from time to time, the Company has utilized the swap market to manage the sensitivity of fair values to interest rate fluctuations.

Inflation can also have direct effects on the Company’s assets and liabilities. The primary direct effect of inflation is the increase in operating expenses. A large portion of the Company’s operating expenses consists of salaries, which are subject to wage increases at least partly affected by the rate of inflation.

The Company reinsures annuities with benefits indexed to the cost of living. Some of these benefits are hedged with a combination of CPI swaps and indexed bonds when material.

Long Term Care products have an inflation component linked to the future cost of such services. If health care costs increase at a much larger rate than what is prevalent in the nominal interest rates available in the markets, the Company may not earn enough investment yield to pay future claims on such products.

Foreign Currency Risk

Foreign currency risk is the risk of changes in level and volatility of currency exchange rates affect the profitability, value or solvency position of the Company. The Company manages its exposure to currency principally by currency matching invested assets with the underlying liabilities to the extent possible. The Company has in place net investment hedges for a portion of its investments in its Canadian operations to reduce excess exposure to these currencies. Translation differences resulting from translating foreign subsidiary balances to U.S. dollars are reflected in stockholders’ equity on the condensed consolidated balance sheets.

The Company generally does not hedge the foreign currency exposure of its subsidiaries transacting business in currencies other than their functional currency (transaction exposure). However, the Company has entered into cross currency swaps to manage exposure to specific currencies. The majority of the Company’s foreign currency transactions are denominated in Australian dollars, British pounds, Canadian dollars, Euros, Japanese yen, Korean won, and the South African rand. The maximum amount of assets held in a specific currency (with the exception of the U.S. dollar) is measured relative to risk targets and is monitored regularly.

Real Estate Risk

Real Estate risk is the risk that changes in the level and volatility of real estate market valuations may impact the profitability, value or solvency position of the Company. The Company has investments in direct real estate equity and debt instruments collateralized by real estate (“real estate loans”). Real estate equity risks include significant reduction in valuations, which could be caused by downturns in the broad economy or in specific geographic regions or sectors. In addition, real estate loan risks include defaults, borrower or tenant bankruptcy and reduced liquidity. Real estate loan risks are partially mitigated by the excess of the value of the property over the loan principle, which provides a buffer should the value of the real estate decrease. The Company manages its real estate loan risk by diversifying by property type and geography and through exposure limits.

Equity Risk

Equity risk is the risk that changes in the level and volatility of equity market valuations affect the profitability, value or solvency position of the Company. This risk includes Variable Annuity and other equity linked exposures and asset related equity exposure. The Company assumes equity risk from alternative investments, fixed indexed annuities and variable annuities. The Company uses derivatives to hedge its exposure to movements in equity markets that have a direct correlation with certain of its reinsurance products.

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Alternative Investments

Alternative investments are investments in non-traditional asset classes that primarily back the Company’s capital and surplus. The Company generally restricts the alternative investments portfolio to non-liability supporting assets: that is, free surplus. Alternative investments generally encompass: hedge funds, emerging markets debt, distressed debt, commodities, infrastructure, tax credits, and equities, both public and private. The Company mitigates its exposure to alternative investments by limiting the size of the alternative investments holding and using per-issuer investment limits.

Fixed Indexed Annuities

The Company reinsures fixed indexed annuities (“FIAs”). Credits for FIAs are affected by changes in equity markets. Thus the fair value of the benefit is primarily a function of index returns and volatility. The Company hedges most of the underlying FIA equity exposure with derivatives.

Variable Annuities

The Company reinsures variable annuities including those with guaranteed minimum death benefits (“GMDB”), guaranteed minimum income benefits (“GMIB”), guaranteed minimum accumulation benefits (“GMAB”) and guaranteed minimum withdrawal benefits (“GMWB”). Strong equity markets, increases in interest rates and decreases in equity market volatility will generally decrease the fair value of the liabilities underlying the benefits. Conversely, a decrease in the equity markets along with a decrease in interest rates and an increase in equity market volatility will generally result in an increase in the fair value of the liabilities underlying the benefits, which has the effect of increasing reserves and lowering earnings. The Company maintains a customized dynamic hedging program that is designed to substantially mitigate the risks associated with income volatility around the change in reserves on guaranteed benefits, ignoring the Company’s own credit risk assessment. However, the hedge positions may not fully offset the changes in the carrying value of the guarantees due to, among other things, time lags, high levels of volatility in the equity and derivative markets, extreme swings in interest rates, unexpected contract holder behavior, and divergence between the performance of the underlying funds and hedging indices. These factors, individually or collectively, may have a material adverse effect on the Company’s net income, financial condition or liquidity. The table below provides a summary of variable annuity account values and the fair value of the guaranteed benefits as of September 30, 2018 and December 31, 2017.

(dollars in millions)	September 30, 2018		December 31, 2017
No guaranteed minimum benefits	$	870	$	950
GMDB only	179		182
GMIB only	24		24
GMAB only	10		22
GMWB only	1,244		1,366
GMDB / WB	309		343
Other	23		31
Total variable annuity account values	$	2,659	$	2,918
Fair value of liabilities associated with living benefit riders	$	90	$	152

Credit Risk

Credit risk, which includes default risk, is risk of loss due to credit quality deterioration of an individual financial asset, derivative or non-derivative contract or instrument. Credit quality deterioration may or may not be accompanied by a ratings downgrade. Generally, the credit exposure for an asset is limited to the fair value, net of any collateral received, at the reporting date.

Investment Credit Risk

Investment credit risk is credit risk related to invested assets. The Company manages investment credit risk using per-issuer investment limits. In addition to per-issuer limits, the Company also limits the total amounts of investments per rating category. An automated compliance system checks for compliance for all investment positions and sends warning messages when there is a breach. The Company manages its credit risk related to over-the-counter derivatives by entering into transactions with creditworthy counterparties, maintaining collateral arrangements and through the use of master agreements that provide for a single net payment to be made by one counterparty to another at each due date and upon termination. Because futures are transacted through regulated exchanges, and positions are marked to market on a daily basis, the Company has minimal exposure to credit-related losses in the event of nonperformance by counterparties to such derivative instruments.

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The Company enters into various collateral arrangements, which require both the posting and accepting of collateral in connection with its derivative instruments. Collateral agreements contain attachment thresholds that vary depending on the posting party’s financial strength ratings. Additionally, a decrease in the Company’s financial strength rating to a specified level results in potential settlement of the derivative positions under the Company’s agreements with its counterparties. A committee is responsible for setting rules and approving and overseeing all transactions requiring collateral. See “Credit Risk” in Note 5 – “Derivative Instruments” in the Notes to Condensed Consolidated Financial Statements for additional information on credit risk related to derivatives.

Counterparty Risk

Counterparty risk is the potential for the Company to incur losses due to a client, retrocessionaire, or partner becoming distressed or insolvent. This includes run-on-the-bank risk and collection risk.

Run-on-the-Bank

The risk that a client’s in force block incurs substantial surrenders and/or lapses due to credit impairment, reputation damage or other market changes affecting the counterparty. Substantially higher than expected surrenders and/or lapses could result in inadequate in force business to recover cash paid out for acquisition costs.

Collection Risk

For clients and retrocessionaires, this includes their inability to satisfy a reinsurance agreement because the right of offset is disallowed by the receivership court; the reinsurance contract is rejected by the receiver, resulting in a premature termination of the contract; and/or the security supporting the transaction becomes unavailable to RGA.

The Company manages counterparty risk by limiting the total exposure to a single counterparty and by only initiating contracts with creditworthy counterparties. In addition, some of the counterparties have set up trusts and letters of credit, reducing the Company’s exposure to these counterparties.

Generally, RGA’s insurance subsidiaries retrocede amounts in excess of their retention to certain other RGA insurance subsidiaries. External retrocessions are arranged through the Company’s retrocession pools for amounts in excess of its retention. As of September 30, 2018, all retrocession pool members in this excess retention pool rated by the A.M. Best Company were rated “A-” or better, except for one pool member that was rated “B++”. A rating of “A-” is the fourth highest rating out of sixteen possible ratings. For a majority of the retrocessionaires that were not rated, letters of credit or trust assets have been given as additional security. In addition, the Company performs annual financial and in force reviews of its retrocessionaires to evaluate financial stability and performance.

The Company has never experienced a material default in connection with retrocession arrangements, nor has it experienced any material difficulty in collecting claims recoverable from retrocessionaires; however, no assurance can be given as to the future performance of such retrocessionaires or as to the recoverability of any such claims.

Aggregate Counterparty Limits

In addition to investment credit limits and counterparty limits, there are aggregate counterparty risk limits which include counterparty exposures from reinsurance, financing and investment activities at an aggregated level to control total exposure to a single counterparty. Counterparty risk aggregation is important because it enables the Company to capture risk exposures at a comprehensive level and under more extreme circumstances compared to analyzing the components individually.

All counterparty exposures are calculated on a quarterly basis, reviewed by management and monitored by the ERM function.

Capital Risk

Capital risk is the risk of lower/negative earnings, potential reduction in enterprise value, and/or the loss of ability to conduct business due to insufficient financial capacity, including not having the appropriate amount of group or entity-level capital to conduct business today or in the future. The Company monitors capital risk exposure using relevant bases of measurement including but not limited to economic, rating agency, and local regulatory methodologies. Additionally, the Company regularly assesses risk related to collateral, financing, liquidity and tax.

Collateral Risk

Collateral risk is the risk that collateral will not be available at expected costs or in the capacity required to meet current and future needs. The Company monitors risks related to interest rate movement, collateral requirements and position and capital markets environment. Collateral demands and resources continue to be actively managed with available collateral sources being more than sufficient to cover stress level collateral demands.

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Financing Risk

Financing risk is the risk that capital will not be available at expected costs or in the capacity required. The Company continues to monitor financing risks related to regulatory financing, contingency financing, and debt capital and sees no immediate issues with its current structures, capacity and plans.

Liquidity Risk

Liquidity risk is the risk that the Company is unable to meet payment obligations at expected costs or in the capacity required. The Company’s traditional liquidity demands include items such as claims, expenses, debt financing and investment purchases which are largely known or can be reasonably forecasted. The Company regularly performs liquidity risk modeling, including both market and Company specific stresses, to assess the sufficiency of available resources.

Tax Risk

Tax risk is the risk that current and future tax positions are different than expected. The Company monitors tax risks related to the evolving tax and regulatory environment, business transactions, legal entity reorganizations, tax compliance obligations, and financial reporting.

Operational Risk

Operational risk is the risk of lower/negative earnings and a potential reduction in enterprise value caused by unexpected losses associated with inadequacy or failure on the part of internal processes, people and systems, or from external events.  The Company regularly monitors and assesses the risks related to business conduct and governance, fraud, privacy and security, business disruption, and business operations. Various insurance, market and credit, capital, and strategy risk obligations and concerns often intersect with the Company’s core operational process risk areas.  Given the scope of the Company’s business and the number of countries in which it operates, this set of risks has the potential to affect the business locally, regionally, or globally. Operational risks are core to managing the Company’s brand and market confidence as well as maintaining its ability to acquire and retain the appropriate expertise to execute and operate the business.

Business Conduct and Governance

Business conduct and governance is the risk related to management oversight, compliance, market conduct, and legal matters. The Company’s Compliance Risk Management Program facilitates a proactive evaluation of present and potential compliance risks associated with both local and enterprise-wide regulatory requirements as well as compliance with Company policies and procedures.

Fraud Risk

Fraud risk is the risk related to the deliberate abuse of and/or taking of Company assets in order to secure gain for the perpetrator or inflict harm on the Company or other victim. Ongoing monitoring and an annual fraud risk assessment enables the Company to continually evaluate potential fraud risks within the organization. 

Privacy and Security Risk

Privacy and security risk is the risk of theft, loss, or unauthorized disclosure of physical or electronic assets resulting in a loss of asset value, confidentiality, or intellectual property. The Company’s privacy and security programs, processes, and procedures are designed to prevent unauthorized physical and electronic theft and the disclosure of confidential and personal data related to its customers, insured individuals or its employees. The Company employs technology, administrative related processes and procedural controls, security measures and other preventative actions to reduce the risk of such incidents.

Business Disruption Risk

Business disruption risk is the risk of impairment to operational capabilities due to the unavailability of people, systems, and/or facilities. The Company’s global business continuity process enables associates to identify potential impacts that threaten operations by providing the framework, policies and procedures and required recurring training for how the Company will recover and restore interrupted critical functions, within a predetermined time, after a disaster or extended disruption, until its normal facilities are restored.

Business Operations Risk

Business operations risk is the risk related to business processes and procedures. Business operations risk includes risk associated with the processing of transactions, data use and management, monitoring and reporting, the integrity and accuracy of models and the use of third party and advisory services.

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Human Capital Risk

Human capital risk is related to workforce management, including talent acquisition, development, retention, and employment relations/regulations. The Company actively monitors human capital risks using multiple practices which include but are not limited to human resource and compliance policies and procedures, regularly reviewing key risk indicators, performance evaluations, compensation and benefits benchmarking, succession planning, employee engagement surveys and associate exit interviews.

Strategic Risk

Strategic risk relates to the planning, implementation, and management of the Company’s business plans and strategies, including the risks associated with: the global environment in which it operates; future law and regulation changes; political risks; and relationships with key external parties.

Strategy Risk

Strategy risk is the risk related to the design and execution of the Company’s strategic plan, including risks associated with merger and acquisition activity. Strategy risks are addressed by a multi-year planning process, regular business unit level assessments of strategy execution and active benchmarking of key performance and risk indicators across the Company’s portfolios of businesses. The Company’s risk appetites and limits are set consistently with strategic objectives.

External Environment Risk

External environment risk relates to external competition, macro trends, and client needs. Macro characteristics that drive market opportunities, risk and growth potential, the competitive landscape and client feedback are closely monitored.

Key Relationships Risk

Key relationships risk relates to areas of important interactions with parties external to the Company. The Company’s reputation is a critical asset in successfully conducting business and therefore relationships with its primary stakeholders (including but not limited to business partners, shareholders, clients, rating agencies, and regulators) are all carefully monitored.

Political and Regulatory Risk

Political and regulatory risk relates to future law and regulation changes and the impact of political changes or instability on the Company’s ability to achieve its objectives. Regulatory and political developments and related risks that may affect the Company are identified, assessed and monitored as part of regular oversight activities.

New Accounting Standards

See Note 13 — “New Accounting Standards” in the Notes to Condensed Consolidated Financial Statements.

ITEM 3.  Quantitative and Qualitative Disclosures About Market Risk

There has been no significant change in the Company’s quantitative or qualitative aspects of market risk during the quarter ended September 30, 2018 from that disclosed in the 2017 Annual Report. See “Item 2 – Management’s Discussion and Analysis of Financial Condition and Results of Operations – Market and Credit Risk”, which is included herein, for additional information.

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ITEM 4.  Controls and Procedures

The Chief Executive Officer and the Chief Financial Officer have evaluated the effectiveness of the design and operation of the Company’s disclosure controls and procedures as defined in Exchange Act Rule 13a-15(e) as of the end of the period covered by this report. Based on that evaluation, the Chief Executive Officer and the Chief Financial Officer concluded that these disclosure controls and procedures were effective.

There was no change in the Company’s internal control over financial reporting as defined in Exchange Act Rule 13a-15(f) during the quarter ended September 30, 2018, that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

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PART II - OTHER INFORMATION

ITEM 1.  Legal Proceedings

The Company is subject to litigation in the normal course of its business. The Company currently has no material litigation. A legal reserve is established when the Company is notified of an arbitration demand or litigation or is notified that an arbitration demand or litigation is imminent, it is probable that the Company will incur a loss as a result and the amount of the probable loss is reasonably capable of being estimated.

ITEM 1A.  Risk Factors

There were no material changes from the risk factors disclosed in the 2017 Annual Report.

ITEM 2.  Unregistered Sales of Equity Securities and Use of Proceeds

Issuer Purchases of Equity Securities

The following table summarizes RGA’s repurchase activity of its common stock during the quarter ended September 30, 2018:

	Total Number of Shares Purchased (1)	Average Price Paid per    Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (1)	Maximum Number (or Approximate Dollar Value) of Shares that May Yet Be Purchased Under the Plan or Program
July 1, 2018 - July 31, 2018	16,406	$	139.95	16,406	$	220,807,197
August 1, 2018 - August 31, 2018	683,388	$	143.21	682,222	$	123,103,321
September 1, 2018 - September 30, 2018	60,977	$	141.67	60,190	$	114,579,309

(1) RGA repurchased 16,406, 682,222 and 60,190 shares of common stock under its share repurchase program for $2.3 million, $97.7 million and $8.5 million during July, August and September 2018, respectively. The Company net settled - issuing 364, 3,353 and 2,081 shares from treasury in July, August and September 2018 and repurchasing from recipients 1,166 and 787 shares in August and September 2018, respectively, in settlement of income tax withholding requirements incurred by the recipients of an equity incentive award.

In January 2017, RGA’s board of directors authorized a share repurchase program, with no expiration date, for up to $400.0 million of RGA’s outstanding common stock.

ITEM 6.  Exhibits

See index to exhibits.

82

INDEX TO EXHIBITS

Exhibit Number	Description
3.1	Amended and Restated Articles of Incorporation, as amended by Amendment of Articles of Incorporation, effective as of May 23, 2018, incorporated by reference to Exhibit 3.1 to Quarterly Report on Form 10-Q for the period ended June 30, 2018, filed on August 3, 2018.
3.2	Amended and Restated Bylaws, effective as of May 23, 2018, incorporated by reference to Exhibit 3.2 to Current Report on Form 8-K filed on May 24, 2018.
10.1	Credit Agreement, dated as of August 21, 2018, by and among RGA, the lenders named therein, U.S. Bank National Association, as Administrative Agent, Swing Line Lender and L/C Issuer, Bank of America, N.A.; JPMorgan Chase Bank, N.A.; and Wells Fargo Bank, National Association as Joint Syndication Agents and Barclays Bank PLC; HSBC Bank USA, National Association; KeyBank National Association; Mizuho Bank, Ltd.; MUFG Bank, Ltd.; Royal Bank of Canada; and Sumitomo Mitsui Banking Corporation as Co-Documentation Agents, incorporated by reference to Exhibit 10.1 to Current Report on Form 8-K filed on August 22, 2018.
31.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document

83

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Reinsurance Group of America, Incorporated
Date: November 2, 2018	By:	/s/ Anna Manning
		Anna Manning
		President & Chief Executive Officer
		(Principal Executive Officer)
Date: November 2, 2018	By:	/s/ Todd C. Larson
		Todd C. Larson
		Senior Executive Vice President & Chief Financial Officer
		(Principal Financial and Accounting Officer)

84

EX-31.1

Exhibit 31.1

CEO CERTIFICATION

I, Anna Manning, certify that:

1.      I have reviewed this quarterly report on Form 10-Q of Reinsurance Group of America, Incorporated;

2.      Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.      Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.  The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)      Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)      Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)      Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)      Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.      The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)      All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)      Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 2, 2018	/s/ Anna Manning
	Anna Manning
	President & Chief Executive Officer

EX-31.2

Exhibit 31.2

CFO CERTIFICATION

I, Todd C. Larson, certify that:

1.      I have reviewed this quarterly report on Form 10-Q of Reinsurance Group of America, Incorporated;

2.      Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.      Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.  The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)      Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)      Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)      Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)      Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.      The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)      All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)      Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 2, 2018	/s/ Todd C. Larson
	Todd C. Larson
	Senior Executive Vice President & Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Reinsurance Group of America, Incorporated and subsidiaries, (the “Company”), for the quarterly period ended September 30, 2018, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Anna Manning, Chief Executive Officer of the Company, certifies, to her best knowledge and belief, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1.  The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.   The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 2, 2018	/s/ Anna Manning
	Anna Manning
	President & Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Reinsurance Group of America, Incorporated and subsidiaries, (the “Company”), for the quarterly period ended September 30, 2018, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Todd C. Larson, Chief Financial Officer of the Company, certifies, to his best knowledge and belief, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1.  The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.   The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: November 2, 2018	/s/ Todd C. Larson
	Todd C. Larson
	Chief Financial Officer
	& Senior Executive Vice President

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 31, 2018
Document And Entitiy Information [Abstract]
Document Type	10-Q
Document period end date	Sep. 30, 2018
Amendment flag	false
Entity registrant name	REINSURANCE GROUP OF AMERICA INC
Entity central index key	0000898174
Entity current reporting status	Yes
Current fiscal year end date	--12-31
Entity filer category	Large Accelerated Filer
Common Shares Outstanding		62,774,675
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Entity Emerging Growth Company	false
Entity Small Business	false

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Fixed maturity securities available-for-sale, at fair value (amortized cost $37,751,132 and $35,281,412)	$ 39,005,212	$ 38,150,820
Equity Securities, FV-NI	101,069	100,152
Mortgage loans on real estate (net of allowances of $10,366 and $9,384)	4,779,074	4,400,533
Policy loans	1,320,050	1,357,624
Funds withheld at interest	5,976,301	6,083,388
Short-term investments	229,928	93,304
Other invested assets	1,706,979	1,505,332
Total investments	53,118,613	51,691,153
Cash and cash equivalents	1,730,489	1,303,524
Accrued investment income	455,296	392,721
Premiums receivable and other reinsurance balances	2,779,556	2,338,481
Reinsurance ceded receivables	769,324	782,027
Deferred policy acquisition costs	3,211,145	3,239,824
Other assets	908,219	767,088
Total assets	62,972,642	60,514,818
Liabilities and Stockholders’ Equity
Future policy benefits	25,139,148	22,363,241
Interest-sensitive contract liabilities	16,751,379	16,227,642
Other policy claims and benefits	5,424,347	4,992,074
Other reinsurance balances	482,235	488,739
Deferred income taxes	1,883,848	2,198,309
Other liabilities	1,213,595	1,102,975
Long-term debt	2,787,975	2,788,365
Collateral finance and securitization notes	710,792	783,938
Total liabilities	54,393,319	50,945,283
Commitments and contingent liabilities (See Note 8)
Stockholders’ Equity:
Preferred stock - par value $.01 per share, 10,000,000 shares authorized, no shares issued or outstanding	0	0
Common stock - par value $.01 per share, 140,000,000 shares authorized, 79,137,758 shares issued at September 30, 2018 and December 31, 2017	791	791
Additional paid-in capital	1,899,144	1,870,906
Retained earnings	7,215,526	6,736,265
Treasury stock, at cost - 16,186,890 and 14,685,663 shares	(1,348,943)	(1,102,058)
Accumulated other comprehensive income	812,805	2,063,631
Total stockholders’ equity	8,579,323	9,569,535
Total liabilities and stockholders’ equity	$ 62,972,642	$ 60,514,818

XML

CONDENSED CONSOLIDATED BALANCE SHEETS PARENTHETICAL - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Available for Sale at Fair value - Amortized cost	$ 37,751,132	$ 35,281,412
Available-for-sale Equity Securities, Amortized Cost Basis	$ 111,248	$ 102,841
Preferred stock par value (per share)	$ 0.01	$ 0.01
Preferred stock shares authorized	10,000,000	10,000,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Common stock par value (per share)	$ 0.01	$ 0.01
Common stock shares authorized	140,000,000	140,000,000
Common Stock, Shares, Issued	79,137,758	79,137,758
Common stock shares outstanding	77,450,868	64,452,095
Treasury stock, shares	1,686,890	14,685,663
Allowances for Loan and Lease Losses, Real Estate	$ 10,366	$ 9,384

XML

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Net premiums	$ 2,562,042	$ 2,489,797	$ 7,739,053	$ 7,335,944
Investment income, net of related expenses	572,742	556,918	1,617,132	1,589,820
Investment related gains (losses), net:
Other-than-temporary impairments on fixed maturity securities	(10,705)	(390)	(14,055)	(20,980)
Other investment related gains (losses), net	(9,312)	23,043	(17,004)	160,451
Total investment related gains (losses), net	(20,017)	22,653	(31,059)	139,471
Other revenues	112,764	75,942	272,020	218,091
Total revenues	3,227,531	3,145,310	9,597,146	9,283,326
Benefits and Expenses:
Claims and other policy benefits	2,209,920	2,100,680	6,851,614	6,371,188
Interest credited	143,292	126,099	333,068	349,068
Policy acquisition costs and other insurance expenses	310,639	365,424	987,817	1,064,645
Other operating expenses	200,262	168,417	586,495	481,279
Interest expense	33,290	36,836	107,769	108,590
Collateral finance and securitization expense	7,467	7,692	22,509	21,235
Total benefits and expenses	2,904,870	2,805,148	8,889,272	8,396,005
Income before income taxes	322,661	340,162	707,874	887,321
Provision for income taxes	21,462	112,571	102,071	282,028
Net income	$ 301,199	$ 227,591	$ 605,803	$ 605,293
Earnings per share:
Basic earnings per share	$ 4.76	$ 3.53	$ 9.47	$ 9.39
Diluted earnings per share	4.68	3.47	9.30	9.23
Dividends declared per share	$ 0.60	$ 0.50	$ 1.60	$ 1.32

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Comprehensive income (loss)
Net income	$ 301,199	$ 227,591	$ 605,803	$ 605,293
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	25,462	46,733	(30,375)	68,085
Net unrealized investment gains (losses)	(215,986)	(93,574)	(1,218,309)	415,870
Defined benefit pension and postretirement plan adjustments	931	700	431	2,473
Total other comprehensive income (loss), net of tax	(189,593)	(46,141)	(1,248,253)	486,428
Total comprehensive income (loss)	$ 111,606	$ 181,450	$ (642,450)	$ 1,091,721

XML

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash Flows from Operating Activities:
Net income	$ 605,803	$ 605,293
Change in operating assets and liabilities:
Accrued investment income	23,473	(63,321)
Premiums receivable and other reinsurance balances	(519,107)	(421,027)
Deferred policy acquisition costs	23,682	67,471
Reinsurance ceded receivable balances	37,468	(120,013)
Future policy benefits, other policy claims and benefits, and other reinsurance balances	920,492	982,164
Deferred income taxes	(8,136)	236,185
Other assets and other liabilities, net	(47,978)	78,848
Amortization of net investment premiums, discounts and other	(55,154)	(95,227)
Depreciation, Depletion and Amortization	32,153	21,384
Investment related (gains) losses, net	31,059	(139,471)
Other, net	56,408	(47,787)
Net cash provided by operating activities	1,100,163	1,104,499
Cash Flows from Investing Activities:
Sales of fixed maturity securities available-for-sale	6,314,968	6,364,236
Maturities of fixed maturity securities available-for-sale	461,764	385,993
Proceeds from Sale of Available-for-sale Securities, Equity	44,952	192,821
Payments to Acquire Debt Securities, Available-for-sale	6,041,665	7,450,749
Payments to Acquire Available-for-sale Securities, Equity	(12,578)	(60,790)
Payments to Acquire Mortgage Notes Receivable	(671,956)	(751,702)
Proceeds from Sale and Collection of Mortgage Notes Receivable	290,450	208,052
Proceeds from Collection of Policy Loans	43,995	93,286
Payments for (Proceeds from) Policy Loans	6,422	5,830
Increase (Decrease) in Funds Held under Reinsurance Agreements	61,969	12,597
Payments to Acquire Businesses, Net of Cash Acquired	31,441	0
Payments to Acquire Property, Plant, and Equipment	(20,478)	(33,242)
Change in short-term investments	34,856	65,664
Change in other invested assets	(313,464)	(51,476)
Net cash provided by (used in) investing activities	31,012	(1,056,334)
Cash Flows from Financing Activities:
Dividends to stockholders	(102,441)	(85,086)
Proceeds from (Repayments of) Secured Debt	(75,146)	(56,637)
Repayments of Long-term Debt	(2,007)	(301,927)
Purchases of treasury stock	(273,873)	(41,360)
Exercise of stock options, net	2,336	4,450
Change in cash collateral for derivative positions and other arrangements	(21,288)	(46,206)
Deposits on universal life and other investment type policies and contracts	320,871	1,007,563
Withdrawals on universal life and other investment type policies and contracts	(520,649)	(568,789)
Net cash used in financing activities	(672,197)	(87,992)
Effect of exchange rate changes on cash	(32,013)	43,699
Change in cash and cash equivalents	426,965	3,872
Cash and cash equivalents, beginning of period	1,303,524	1,200,718
Cash and cash equivalents, end of period	1,730,489	1,204,590
Supplemental disclosures of cash flow information:
Interest Paid, Excluding Capitalized Interest, Operating Activities	124,575	129,136
Income Taxes Paid, Net	99,554	27,385
Transfer to Investments	3,763,195	2,247,136
Noncash or Part Noncash Acquisition, Value of Assets Acquired	69,853	0
Noncash or Part Noncash Acquisition, Value of Liabilities Assumed	$ (38,412)	$ 0

XML

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (PARENTHETICAL) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
Statement of Cash Flows [Abstract]
Cash Acquired from Acquisition	$ 4,938

XML

Business and Basis of Presentation

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Basis of Presentation

Business and Basis of Presentation

Reinsurance Group of America, Incorporated (“RGA”) is an insurance holding company that was formed on December 31, 1992. The accompanying unaudited condensed consolidated financial statements of RGA and its subsidiaries (collectively, the “Company”) have been prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, these condensed consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments, including normal recurring adjustments necessary for a fair presentation have been included. Results for the nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. These unaudited condensed consolidated financial statements include the accounts of RGA and its subsidiaries, and all intercompany accounts and transactions have been eliminated. These condensed consolidated statements should be read in conjunction with the Company’s 2017 Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on February 27, 2018 (the “2017 Annual Report”).

XML

Earnings Per Share

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share on net income (in thousands, except per share information):

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Earnings:
Net income (numerator for basic and diluted calculations)	$	301,199	$	227,591	$	605,803	$	605,293
Shares:
Weighted average outstanding shares (denominator for basic calculation)	63,279		64,488		63,941		64,430
Equivalent shares from outstanding stock options	1,017		1,165		1,189		1,174
Denominator for diluted calculation	64,296		65,653		65,130		65,604
Earnings per share:
Basic	$	4.76	$	3.53	$	9.47	$	9.39
Diluted	$	4.68	$	3.47	$	9.30	$	9.23

The calculation of common equivalent shares does not include the impact of options having a strike or conversion price that exceeds the average stock price for the earnings period, as the result would be antidilutive. The calculation of common equivalent shares also excludes the impact of outstanding performance contingent shares, as the conditions necessary for their issuance have not been satisfied as of the end of the reporting period. The following table presents approximate amounts of stock options and performance contingent shares excluded from the calculation of common equivalent shares (in thousands):

	Three months ended September 30,		Nine months ended September 30,
	2018	2017	2018	2017
Excluded from common equivalent shares:
Stock options	227	87	349	296
Performance contingent shares	276	307	256	293

XML

Equity

9 Months Ended

Sep. 30, 2018

Stockholders' Equity Note [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

Equity

Common Stock

The changes in number of common stock shares, issued, held in treasury and outstanding are as follows for the periods indicated:

	Issued	Held In Treasury		Outstanding
Balance, December 31, 2017	79,137,758	14,685,663		64,452,095
Common stock acquired	—	1,750,295		(1,750,295	)
Stock-based compensation (1)	—	(249,068	)	249,068
Balance, September 30, 2018	79,137,758	16,186,890		62,950,868

	Issued	Held In Treasury		Outstanding
Balance, December 31, 2016	79,137,758	14,835,256		64,302,502
Common stock acquired	—	208,680		(208,680	)
Stock-based compensation (1)	—	(274,449	)	274,449
Balance, September 30, 2017	79,137,758	14,769,487		64,368,271

(1) Represents net shares issued from treasury pursuant to the Company’s equity-based compensation programs.

Common Stock Held in Treasury

Common stock held in treasury is accounted for at average cost. Gains resulting from the reissuance of common stock held in treasury are credited to additional paid-in capital. Losses resulting from the reissuance of common stock held in treasury are charged first to additional paid-in capital to the extent the Company has previously recorded gains on treasury share transactions, then to retained earnings.

In January 2017, RGA’s board of directors authorized a share repurchase program for up to $400.0 million of RGA’s outstanding common stock. The authorization was effective immediately and does not have an expiration date. During the first nine months of 2018, RGA repurchased 1.8 million shares of common stock under this program for $258.5 million. During the first nine months of 2017, RGA repurchased 0.2 million shares of common stock under this program for $26.9 million.

Accumulated Other Comprehensive Income (Loss)

The balance of and changes in each component of accumulated other comprehensive income (loss) (“AOCI”) for the nine months ended September 30, 2018 and 2017 are as follows (dollars in thousands):

	Accumulated Currency Translation Adjustments			Unrealized Appreciation (Depreciation) of Investments(1)			Pension and Postretirement Benefits			Total
Balance, December 31, 2017	$	(86,350	)	$	2,200,661		$	(50,680	)	$	2,063,631
Other comprehensive income (loss) before reclassifications	(24,977		)	(1,638,146		)	(3,391		)	(1,666,514		)
Amounts reclassified to (from) AOCI	—			79,505			3,986			83,491
Deferred income tax benefit (expense)	(5,398		)	340,332			(164		)	334,770
Adoption of new accounting standard	(2,573		)	—			—			(2,573		)
Balance, September 30, 2018	$	(119,298	)	$	982,352		$	(50,249	)	$	812,805

	Accumulated Currency Translation Adjustments			Unrealized Appreciation (Depreciation) of Investments(1)			Pension and Postretirement Benefits			Total
Balance, December 31, 2016	$	(172,541	)	$	1,355,033		$	(43,163	)	$	1,139,329
Other comprehensive income (loss) before reclassifications	23,117			671,564			(191		)	694,490
Amounts reclassified to (from) AOCI	—			(51,407		)	4,006			(47,401		)
Deferred income tax benefit (expense)	44,968			(204,287		)	(1,342		)	(160,661		)
Balance, September 30, 2017	$	(104,456	)	$	1,770,903		$	(40,690	)	$	1,625,757

(1) Includes cash flow hedges of $29,043 and $2,619 as of September 30, 2018 and December 31, 2017, respectively, and $347 and $(2,496) as of September 30, 2017 and December 31, 2016, respectively. See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.

The following table presents the amounts of AOCI reclassifications for the three and nine months ended September 30, 2018 and 2017 (dollars in thousands):

	Amount Reclassified from AOCI
	Three months ended September 30,						Nine months ended September 30,
Details about AOCI Components	2018			2017			2018			2017			Affected Line Item in  Statements of Income
Net unrealized investment gains (losses):
Net unrealized gains (losses) on available-for-sale securities	$	(21,249	)	$	10,515		$	(60,347	)	$	39,032		Investment related gains (losses), net
Cash flow hedges - Interest rate	234			—			(108		)	—			(1)
Cash flow hedges - Currency/Interest rate	50			230			270			560			(1)
Cash flow hedges - Forward bond purchase commitments	—			224			—			286			(1)
Deferred policy acquisition costs attributed to unrealized gains and losses	(4,893		)	1,116			(19,320		)	11,529			(2)
Total	(25,858		)	12,085			(79,505		)	51,407
Provision for income taxes	5,355			(3,991		)	16,978			(16,015		)
Net unrealized gains (losses), net of tax	$	(20,503	)	$	8,094		$	(62,527	)	$	35,392
Amortization of defined benefit plan items:
Prior service cost (credit)	$	246		$	590		$	739		$	732		(3)
Actuarial gains/(losses)	(1,866		)	(1,661		)	(4,725		)	(4,738		)	(3)
Total	(1,620		)	(1,071		)	(3,986		)	(4,006		)
Provision for income taxes	340			375			837			1,402
Amortization of defined benefit plans, net of tax	$	(1,280	)	$	(696	)	$	(3,149	)	$	(2,604	)
Total reclassifications for the period	$	(21,783	)	$	7,398		$	(65,676	)	$	32,788

(1) See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.

(2) This AOCI component is included in the computation of the deferred policy acquisition cost. See Note 8 – “Deferred Policy Acquisition Costs” of the 2017 Annual Report for additional details.

(3) This AOCI component is included in the computation of the net periodic pension cost. See Note 10 – “Employee Benefit Plans” for additional deta

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Equity Based Compensation

9 Months Ended

Sep. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Equity Based Compensation

Equity Based Compensation

Equity compensation expense was $28.4 million and $17.1 million in the first nine months of 2018 and 2017, respectively. In the first quarter of 2018, the Company granted 0.2 million stock appreciation rights at $150.87 weighted average exercise price per share and 0.1 million performance contingent units to employees. Additionally, non-employee directors were granted a total of 7,623 shares of common stock. As of September 30, 2018, 1.5 million share options at a weighted average strike price per share of $66.48 were vested and exercisable, with a remaining weighted average exercise period of 4.3 years. As of September 30, 2018, the total compensation cost of non-vested awards not yet recognized in the condensed consolidated financial statements was $35.1 million. It is estimated that these costs will vest over a weighted average period of 1.3 years.

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Investments

9 Months Ended

Sep. 30, 2018

Investments [Abstract]

Investments

Investments

Fixed Maturity and Equity Securities Available-for-Sale

The Company holds various types of fixed maturity securities available-for-sale and classifies them as corporate securities (“Corporate”), Canadian and Canadian provincial government securities (“Canadian government”), residential mortgage-backed securities (“RMBS”), asset-backed securities (“ABS”), commercial mortgage-backed securities (“CMBS”), U.S. government and agencies (“U.S. government”), state and political subdivisions, and other foreign government, supranational and foreign government-sponsored enterprises (“Other foreign government”).

The following table provides information relating to investments in fixed maturity securities by sector as of September 30, 2018 (dollars in thousands):

September 30, 2018:	Amortized Cost		Unrealized Gains		Unrealized Losses		Estimated Fair Value		% of Total		Other-than- temporary impairments in AOCI
Available-for-sale:
Corporate	$	24,271,467	$	594,444	$	416,413	$	24,449,498	62.7	%	$	—
Canadian government	2,902,433		1,138,426		4,109		4,036,750		10.3		—
RMBS	1,816,949		14,235		50,422		1,780,762		4.6		—
ABS	1,867,650		10,312		14,945		1,863,017		4.8		275
CMBS	1,282,015		8,403		16,884		1,273,534		3.3		—
U.S. government	1,500,703		6,359		94,653		1,412,409		3.6		—
State and political subdivisions	889,218		36,410		13,637		911,991		2.3		—
Other foreign government	3,220,697		98,574		42,020		3,277,251		8.4		—
Total fixed maturity securities	$	37,751,132	$	1,907,163	$	653,083	$	39,005,212	100.0	%	$	275

 The following table provides information relating to investments in fixed maturity and equity securities by sector as of December 31, 2017 (dollars in thousands):

December 31, 2017:	Amortized Cost		Unrealized Gains		Unrealized Losses		Estimated Fair Value		% of Total		Other-than- temporary impairments in AOCI
Available-for-sale:
Corporate	$	21,966,803	$	1,299,594	$	55,429	$	23,210,968	60.9	%	$	—
Canadian government	2,843,273		1,378,510		1,707		4,220,076		11.1		—
RMBS	1,695,126		36,632		11,878		1,719,880		4.5		—
ABS	1,634,758		18,798		5,194		1,648,362		4.3		275
CMBS	1,285,594		22,627		4,834		1,303,387		3.4		—
U.S. government	1,953,436		12,089		21,933		1,943,592		5.1		—
State and political subdivisions	647,727		59,997		4,296		703,428		1.8		—
Other foreign government	3,254,695		154,507		8,075		3,401,127		8.9		—
Total fixed maturity securities	$	35,281,412	$	2,982,754	$	113,346	$	38,150,820	100.0	%	$	275
Non-redeemable preferred stock	$	41,553	$	479	$	2,226	$	39,806	39.7	%
Other equity securities	61,288		479		1,421		60,346		60.3
Total equity securities	$	102,841	$	958	$	3,647	$	100,152	100.0	%

The Company enters into various collateral arrangements with counterparties that require both the pledging and acceptance of fixed maturity securities as collateral. Pledged fixed maturity securities are included in fixed maturity securities, available-for-sale in the condensed consolidated balance sheets. Fixed maturity securities received as collateral are held in separate custodial accounts and are not recorded on the Company’s condensed consolidated balance sheets. Subject to certain constraints, the Company is permitted by contract to sell or repledge collateral it receives; however, as of September 30, 2018 and December 31, 2017, none of the collateral received had been sold or repledged. The Company also holds assets in trust to satisfy collateral requirements under derivative transactions and certain third-party reinsurance treaties. The following table includes fixed maturity securities pledged and received as collateral and assets in trust held to satisfy collateral requirements under derivative transactions and certain third-party reinsurance treaties as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018				December 31, 2017
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Fixed maturity securities pledged as collateral	$	67,899	$	69,792	$	72,542	$	75,622
Fixed maturity securities received as collateral	n/a		592,146		n/a		590,417
Assets in trust held to satisfy collateral requirements	19,263,724		19,670,559		15,584,296		16,715,281

The Company monitors its concentrations of financial instruments on an ongoing basis and mitigates credit risk by maintaining a diversified investment portfolio which limits exposure to any one issuer. The Company’s exposure to concentrations of credit risk from single issuers greater than 10% of the Company’s stockholders’ equity included securities of the U.S. government and its agencies as well as the securities disclosed below as of September 30, 2018 and December 31, 2017 (dollars in thousands).

	September 30, 2018				December 31, 2017
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Fixed maturity securities guaranteed or issued by:
Canadian province of Quebec	$	1,158,326	$	1,833,972	$	1,119,337	$	1,917,996
Canadian province of Ontario	951,186		1,225,712		939,837		1,282,944

The amortized cost and estimated fair value of fixed maturity securities classified as available-for-sale at September 30, 2018 are shown by contractual maturity in the table below (dollars in thousands). Actual maturities can differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Asset and mortgage-backed securities are shown separately in the table below, as they are not due at a single maturity date.

	Amortized Cost		Estimated Fair Value
Available-for-sale:
Due in one year or less	$	986,289	$	993,352
Due after one year through five years	7,797,732		7,888,116
Due after five years through ten years	9,311,737		9,407,186
Due after ten years	14,688,760		15,799,245
Asset and mortgage-backed securities	4,966,614		4,917,313
Total	$	37,751,132	$	39,005,212

Corporate Fixed Maturity Securities

The tables below show the major industry types of the Company’s corporate fixed maturity holdings as of September 30, 2018 and December 31, 2017 (dollars in thousands):

September 30, 2018:			Estimated
	Amortized Cost		Fair Value		% of Total
Finance	$	8,561,885	$	8,564,254	35.1	%
Industrial	12,632,502		12,753,024		52.1
Utility	3,077,080		3,132,220		12.8
Total	$	24,271,467	$	24,449,498	100.0	%
December 31, 2017:			Estimated
	Amortized Cost		Fair Value		% of Total
Finance	$	7,977,885	$	8,362,774	36.1	%
Industrial	11,535,166		12,199,333		52.5
Utility	2,453,752		2,648,861		11.4
Total	$	21,966,803	$	23,210,968	100.0	%

Other-Than-Temporary Impairments - Fixed Maturity Securities

As discussed in Note 2 – “Summary of Significant Accounting Policies” of the 2017 Annual Report, a portion of certain other-than-temporary impairment (“OTTI”) losses on fixed maturity securities is recognized in AOCI. For these securities, the net amount recognized in the condensed consolidated statements of income (“credit loss impairments”) represents the difference between the amortized cost of the security and the net present value of its projected future cash flows discounted at the effective interest rate implicit in the debt security prior to impairment. Any remaining difference between the fair value and amortized cost is recognized in AOCI. The following table sets forth the amount of pre-tax credit loss impairments on fixed maturity securities held by the Company as of the dates indicated, for which a portion of the OTTI loss was recognized in AOCI, and the corresponding changes in such amounts (dollars in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Balance, beginning of period	$	3,677	$	3,677	$	3,677	$	6,013
Credit loss OTTI previously recognized on securities impaired to fair value during the period	—		—		—		(2,336		)
Balance, end of period	$	3,677	$	3,677	$	3,677	$	3,677

Unrealized Losses for Fixed Maturity and Equity Securities Available-for-Sale

The following table presents the total gross unrealized losses for the 2,866 fixed maturity securities as of September 30, 2018, where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in thousands):

	September 30, 2018
	Gross Unrealized Losses		% of Total
Less than 20%	$	640,481	98.1	%
20% or more for less than six months	309		—
20% or more for six months or greater	12,293		1.9
Total	$	653,083	100.0	%

The following table presents the total gross unrealized losses for the 1,116 fixed maturity and equity securities at December 31, 2017 where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in thousands):

	December 31, 2017
	Gross Unrealized Losses		% of Total
Less than 20%	$	113,466	97.0	%
20% or more for less than six months	689		0.6
20% or more for six months or greater	2,838		2.4
Total	$	116,993	100.0	%

The Company’s determination of whether a decline in value is other-than-temporary includes an analysis of the underlying credit and the extent and duration of a decline in value. The Company’s credit analysis of an investment includes determining whether the issuer is current on its contractual payments, evaluating whether it is probable that the Company will be able to collect all amounts due according to the contractual terms of the security and analyzing the overall ability of the Company to recover the amortized cost of the investment.

The following table presents the estimated fair values and gross unrealized losses, including other-than-temporary impairment losses reported in AOCI, for 2,866 fixed maturity securities that have estimated fair values below amortized cost as of September 30, 2018 (dollars in thousands). These investments are presented by class and grade of security, as well as the length of time the related fair value has remained below amortized cost.

	Less than 12 months				12 months or greater				Total
			Gross				Gross				Gross
September 30, 2018:	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
Investment grade securities:
Corporate	$	10,117,970	$	303,926	$	1,290,804	$	81,236	$	11,408,774	$	385,162
Canadian government	58,816		1,211		107,167		2,736		165,983		3,947
RMBS	931,044		23,339		528,739		27,063		1,459,783		50,402
ABS	680,900		8,650		262,544		6,243		943,444		14,893
CMBS	555,716		8,304		207,943		8,580		763,659		16,884
U.S. government	197,114		3,913		1,002,661		90,740		1,199,775		94,653
State and political subdivisions	261,456		6,722		90,649		6,915		352,105		13,637
Other foreign government	1,034,417		24,666		297,566		11,062		1,331,983		35,728
Total investment grade securities	13,837,433		380,731		3,788,073		234,575		17,625,506		615,306
Below investment grade securities:
Corporate	539,521		23,955		77,675		7,296		617,196		31,251
Canadian government	2,328		162		—		—		2,328		162
RMBS	—		—		1,102		20		1,102		20
ABS	—		—		1,110		52		1,110		52
Other foreign government	140,692		5,931		6,410		361		147,102		6,292
Total below investment grade securities	682,541		30,048		86,297		7,729		768,838		37,777
Total fixed maturity securities	$	14,519,974	$	410,779	$	3,874,370	$	242,304	$	18,394,344	$	653,083

The following table presents the estimated fair values and gross unrealized losses, including other-than-temporary impairment losses reported in AOCI, for 1,116 fixed maturity and equity securities that have estimated fair values below amortized cost as of December 31, 2017 (dollars in thousands):

	Less than 12 months				12 months or greater				Total
			Gross				Gross				Gross
December 31, 2017:	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
Investment grade securities:
Corporate	$	1,886,212	$	17,099	$	1,009,750	$	28,080	$	2,895,962	$	45,179
Canadian government	18,688		91		111,560		1,596		130,248		1,687
RMBS	566,699		5,852		224,439		6,004		791,138		11,856
ABS	434,274		2,707		168,524		2,434		602,798		5,141
CMBS	220,401		1,914		103,269		2,920		323,670		4,834
U.S. government	800,298		6,177		767,197		15,756		1,567,495		21,933
State and political subdivisions	43,510		242		68,666		4,054		112,176		4,296
Other foreign government	369,717		2,707		191,265		4,704		560,982		7,411
Total investment grade securities	4,339,799		36,789		2,644,670		65,548		6,984,469		102,337
Below investment grade securities:
Corporate	194,879		3,317		75,731		6,933		270,610		10,250
Canadian government	1,995		20		—		—		1,995		20
RMBS	—		—		1,369		22		1,369		22
ABS	—		—		1,489		53		1,489		53
Other foreign government	28,600		113		15,134		551		43,734		664
Total below investment grade securities	225,474		3,450		93,723		7,559		319,197		11,009
Total fixed maturity securities	$	4,565,273	$	40,239	$	2,738,393	$	73,107	$	7,303,666	$	113,346
Non-redeemable preferred stock	$	82	$	1	$	26,471	$	2,225	$	26,553	$	2,226
Other equity securities	5,820		1,023		47,251		398		53,071		1,421
Total equity securities	$	5,902	$	1,024	$	73,722	$	2,623	$	79,624	$	3,647

The Company has no intention to sell, nor does it expect to be required to sell, the securities outlined in the table above, as of the dates indicated. However, unforeseen facts and circumstances may cause the Company to sell fixed maturity securities in the ordinary course of managing its portfolio to meet certain diversification, credit quality and liquidity guidelines. Changes in unrealized losses are primarily being driven by changes in interest rates.

Investment Income, Net of Related Expenses

Major categories of investment income, net of related expenses, consist of the following (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Fixed maturity securities available-for-sale	$	378,669		$	359,157		$	1,121,496		$	1,039,392
Equity securities	1,319			942			3,710			3,296
Mortgage loans on real estate	54,424			50,040			155,083			138,829
Policy loans	14,730			15,404			44,285			45,870
Funds withheld at interest	108,232			102,144			270,094			327,089
Short-term investments and cash and cash equivalents	3,067			1,977			9,276			5,266
Other invested assets	35,594			46,653			80,207			87,192
Investment income	596,035			576,317			1,684,151			1,646,934
Investment expense	(23,293		)	(19,399		)	(67,019		)	(57,114		)
Investment income, net of related expenses	$	572,742		$	556,918		$	1,617,132		$	1,589,820

Investment Related Gains (Losses), Net

Investment related gains (losses), net consist of the following (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Fixed maturity securities available for sale:
Other-than-temporary impairment losses	$	(10,705	)	$	(390	)	$	(14,055	)	$	(20,980	)
Gain on investment activity	20,040			19,512			52,146			91,611
Loss on investment activity	(37,880		)	(7,593		)	(94,194		)	(26,577		)
Equity securities:
Other-than-temporary impairment losses	—			(889		)	—			(889		)
Gain on investment activity	3,932			10			4,429			24
Loss on investment activity	(174		)	(85		)	(1,124		)	(4,135		)
Change in unrealized gains (losses) recognized in earnings	3,539			—			(7,564		)	—
Other impairment losses and change in mortgage loan provision	(6,566		)	(2,446		)	(8,235		)	(9,220		)
Derivatives and other, net	7,797			14,534			37,538			109,637
Total investment related gains (losses), net	$	(20,017	)	$	22,653		$	(31,059	)	$	139,471

The fixed maturity impairments for the three and nine months ended September 30, 2018 and 2017 were largely related to high-yield corporate securities. The equity impairments for the three and nine months ended September 30, 2017 were related to an equity position received as part of a debt restructuring. The other impairment losses and change in mortgage loan provision for the three and nine months ended September 30, 2018 includes impairments on real estate joint ventures and limited partnerships. The other impairment losses and change in mortgage loan provision for the three and nine months ended September 30, 2017 includes impairments on limited partnerships. The fluctuations in investment related gains (losses) for derivatives and other for the three and nine months ended September 30, 2018, compared to the same periods in 2017, are primarily due to changes in the fair value of embedded derivatives and interest rate swaps.

During the three months ended September 30, 2018 and 2017, the Company sold fixed maturity securities with fair values of $1,345.3 million and $479.7 million at losses of $37.9 million and $7.6 million, respectively. During the nine months ended September 30, 2018 and 2017, the Company sold fixed maturity securities with fair values of $3,783.3 million and $1,604.7 million at losses of $94.2 million and $26.6 million, respectively. During the three months ended September 30, 2018 and 2017, the Company sold equity securities with fair values of $3.1 million and $5.0 million at losses of $0.2 million and $0.1 million, respectively. During the nine months ended September 30, 2018 and 2017, the Company sold equity securities with fair values of $31.5 million and $166.7 million at losses of $1.1 million and $4.1 million, respectively. The Company generally does not buy and sell securities on a short-term basis.

Securities Borrowing, Lending and Other

The following table includes the amount of borrowed securities, securities lent and securities collateral received as part of the securities lending program and repurchased/reverse repurchased securities pledged and received as of September 30, 2018 and December 31, 2017 (dollars in thousands).

	September 30, 2018				December 31, 2017
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Borrowed securities	$	353,650	$	370,323	$	358,875	$	377,820
Securities lending:
Securities loaned	101,965		102,489		117,246		121,551
Securities received	n/a		112,000		n/a		128,000
Repurchase program/reverse repurchase program:
Securities pledged	408,679		404,905		413,819		428,344
Securities received	n/a		400,515		n/a		417,550

The Company also held cash collateral for securities lending and the repurchase program/reverse repurchase programs of $28.9 million and $31.2 million at September 30, 2018 and December 31, 2017, respectively. No cash or securities have been pledged by the Company for its securities borrowing program as of September 30, 2018 and December 31, 2017.

The following tables present information on the Company’s securities lending and repurchase transactions as of September 30, 2018 and December 31, 2017 (dollars in thousands). Collateral associated with certain borrowed securities is not included within the table, as the collateral pledged to each counterparty is the right to reinsurance treaty cash flows.

	September 30, 2018
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Securities lending transactions:
Corporate	$	—	$	—	$	—	$	102,489	$	102,489
Total	—		—		—		102,489		102,489
Repurchase transactions:
Corporate	—		—		—		132,228		132,228
U.S. government	—		—		—		219,906		219,906
Foreign government	—		—		—		52,771		52,771
Other	—		—		—		—		—
Total	—		—		—		404,905		404,905
Total transactions	$	—	$	—	$	—	$	507,394	$	507,394
Gross amount of recognized liabilities for securities lending and repurchase transactions in preceding table									$	541,411
Amounts related to agreements not included in offsetting disclosure									$	34,017

	December 31, 2017
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Securities lending transactions:
Corporate	$	—	$	—	$	—	$	121,551	$	121,551
Total	$	—	$	—	$	—	$	121,551	$	121,551
Repurchase transactions:
Corporate	$	—	$	—	$	312	$	184,334	$	184,646
U.S. government	—		—		—		220,765		220,765
Foreign government	—		—		—		21,802		21,802
Other	1,131		—		—		—		1,131
Total	1,131		—		312		426,901		428,344
Total borrowings	$	1,131	$	—	$	312	$	548,452	$	549,895
Gross amount of recognized liabilities for securities lending and repurchase transactions in preceding table									$	576,786
Amounts related to agreements not included in offsetting disclosure									$	26,891

The Company has elected to offset amounts recognized as receivables and payables resulting from the repurchase/reverse repurchase programs. After the effect of offsetting, the net amount presented on the condensed consolidated balance sheets was a liability of $0.4 million and $1.1 million of September 30, 2018 and December 31, 2017, respectively. As of September 30, 2018 and December 31, 2017, the Company recognized payables resulting from cash received as collateral associated with a repurchase agreement as discussed above. Amounts owed to and due from the counterparties may be settled in cash or offset, in accordance with the agreements.

Mortgage Loans on Real Estate

Mortgage loans represented approximately 9.0% and 8.5% of the Company’s total investments as of September 30, 2018 and December 31, 2017. As of September 30, 2018, mortgage loans were geographically dispersed throughout the U.S. with the largest concentrations in California (18.8%), Texas (10.0%) and Georgia (7.5%) and include loans secured by properties in Canada (2.6%). The recorded investment in mortgage loans on real estate presented below is gross of unamortized deferred loan origination fees and expenses, and valuation allowances.

The distribution of mortgage loans by property type is as follows as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018					December 31, 2017
Property type:	Carrying Value			% of Total		Carrying Value			% of Total
Office building	$	1,633,887		34.1	%	$	1,487,392		33.6	%
Retail	1,365,157			28.5		1,270,676			28.8
Industrial	983,553			20.5		938,612			21.3
Apartment	543,917			11.3		510,052			11.6
Other commercial	267,712			5.6		206,439			4.7
Recorded investment	4,794,226			100.0	%	4,413,171			100.0	%
Unamortized balance of loan origination fees and expenses	(4,786		)			(3,254		)
Valuation allowances	(10,366		)			(9,384		)
Total mortgage loans on real estate	$	4,779,074				$	4,400,533

The maturities of mortgage loans as of September 30, 2018 and December 31, 2017 are as follows (dollars in thousands):

	September 30, 2018				December 31, 2017
	Recorded Investment		% of Total		Recorded Investment		% of Total
Due within five years	$	1,216,241	25.4	%	$	1,091,066	24.8	%
Due after five years through ten years	2,738,400		57.1		2,516,872		57.0
Due after ten years	839,585		17.5		805,233		18.2
Total	$	4,794,226	100.0	%	$	4,413,171	100.0	%

The following tables set forth certain key credit quality indicators of the Company’s recorded investment in mortgage loans as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	Recorded Investment
	Debt Service Ratios						Construction loans
	>1.20x		1.00x - 1.20x		<1.00x				Total		% of Total
September 30, 2018:
Loan-to-Value Ratio
0% - 59.99%	$	2,146,401	$	63,794	$	43,486	$	25,724	$	2,279,405	47.6	%
60% - 69.99%	1,666,525		117,726		62,617		—		1,846,868		38.5
70% - 79.99%	386,137		70,884		76,054		—		533,075		11.1
Greater than 80%	108,233		22,429		4,216		—		134,878		2.8
Total	$	4,307,296	$	274,833	$	186,373	$	25,724	$	4,794,226	100.0	%

	Recorded Investment
	Debt Service Ratios						Construction loans
	>1.20x		1.00x - 1.20x		<1.00x				Total		% of Total
December 31, 2017:
Loan-to-Value Ratio
0% - 59.99%	$	2,148,428	$	53,979	$	3,801	$	—	$	2,206,208	50.0	%
60% - 69.99%	1,517,029		47,128		43,921		—		1,608,078		36.4
70% - 79.99%	396,446		19,461		15,367		—		431,274		9.8
Greater than 80%	120,850		30,713		6,362		9,686		167,611		3.8
Total	$	4,182,753	$	151,281	$	69,451	$	9,686	$	4,413,171	100.0	%

The age analysis of the Company’s past due recorded investments in mortgage loans as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018		December 31, 2017
31-60 days past due	$	—	$	17,100
61-90 days past due	—		2,056
Total past due	—		19,156
Current	4,794,226		4,394,015
Total	$	4,794,226	$	4,413,171

The following table presents the recorded investment in mortgage loans, by method of measuring impairment, and the related valuation allowances as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018		December 31, 2017
Mortgage loans:
Individually measured for impairment	$	30,629	$	5,858
Collectively measured for impairment	4,763,597		4,407,313
Recorded investment	$	4,794,226	$	4,413,171
Valuation allowances:
Individually measured for impairment	$	—	$	—
Collectively measured for impairment	10,366		9,384
Total valuation allowances	$	10,366	$	9,384

Information regarding the Company’s loan valuation allowances for mortgage loans for the three and nine months ended September 30, 2018 and 2017 is as follows (dollars in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018			2017
Balance, beginning of period	$	9,706	$	8,156	$	9,384		$	7,685
Provision (release)	656		977		986			1,444
Translation adjustment	4		4		(4		)	8
Balance, end of period	$	10,366	$	9,137	$	10,366		$	9,137

Information regarding the portion of the Company’s mortgage loans that were impaired as of September 30, 2018 and December 31, 2017 is as follows (dollars in thousands):

	Unpaid Principal Balance		Recorded Investment		Related Allowance		Carrying Value
September 30, 2018:
Impaired mortgage loans with no valuation allowance recorded	$	30,660	$	30,629	$	—	$	30,629
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	30,660	$	30,629	$	—	$	30,629
December 31, 2017:
Impaired mortgage loans with no valuation allowance recorded	$	6,427	$	5,858	$	—	$	5,858
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	6,427	$	5,858	$	—	$	5,858
The Company’s average investment in impaired mortgage loans and the related interest income are reflected in the table below for the periods indicated (dollars in thousands):
	Three months ended September 30,
	2018				2017
	Average Recorded Investment(1)		Interest Income		Average Recorded   Investment(1)		Interest Income
Impaired mortgage loans with no valuation allowance recorded	$	30,641	$	346	$	3,967	$	33
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	30,641	$	346	$	3,967	$	33
	Nine months ended September 30,
	2018				2017
	Average Recorded Investment(1)		Interest Income		Average Recorded Investment(1)		Interest Income
Impaired mortgage loans with no valuation allowance recorded	$	22,641	$	650	$	3,062	$	100
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	22,641	$	650	$	3,062	$	100

(1) Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balances.

The Company did not acquire any impaired mortgage loans during the nine months ended September 30, 2018 and 2017. The Company had no mortgage loans that were on a nonaccrual status at September 30, 2018 and December 31, 2017.

Policy Loans

Policy loans comprised approximately 2.5% and 2.6% of the Company’s total investments as of September 30, 2018 and December 31, 2017, respectively, the majority of which are associated with one client. These policy loans present no credit risk because the amount of the loan cannot exceed the obligation due to the ceding company upon the death of the insured or surrender of the underlying policy. The provisions of the treaties in force and the underlying policies determine the policy loan interest rates. The Company earns a spread between the interest rate earned on policy loans and the interest rate credited to corresponding liabilities.

Funds Withheld at Interest

Funds withheld at interest comprised approximately 11.3% and 11.8% of the Company’s total investments as of both September 30, 2018 and December 31, 2017. Of the $6.0 billion funds withheld at interest balance, net of embedded derivatives, as of September 30, 2018, $3.9 billion of the balance is associated with one client. For reinsurance agreements written on a modified coinsurance basis and certain agreements written on a coinsurance funds withheld basis, assets equal to the net statutory reserves are withheld and legally owned and managed by the ceding company and are reflected as funds withheld at interest on the Company’s condensed consolidated balance sheets. In the event of a ceding company’s insolvency, the Company would need to assert a claim on the assets supporting its reserve liabilities. However, the risk of loss to the Company is mitigated by its ability to offset amounts it owes the ceding company for claims or allowances against amounts owed to the Company from the ceding company.

Other Invested Assets

Other invested assets include limited partnership interests, joint ventures (other than operating joint ventures), equity release mortgages, derivative contracts and fair value option (“FVO”) contractholder-directed unit-linked investments. Other invested assets also include Federal Home Loan Bank of Des Moines (“FHLB”) common stock which is included in other in the table below. Other invested assets represented approximately 3.2% and 2.9% of the Company’s total investments as of September 30, 2018 and December 31, 2017, respectively. Carrying values of these assets as of September 30, 2018 and December 31, 2017 are as follows (dollars in thousands):

	September 30, 2018		December 31, 2017
Limited partnership interests and real estate joint ventures	$	924,006	$	781,124
Equity release mortgages	383,450		219,940
Derivatives	101,124		137,613
FVO contractholder-directed unit-linked investments	212,315		218,541
Other	86,084		148,114
Total other invested assets	$	1,706,979	$	1,505,332

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Derivative Instruments

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

Derivative Instruments

Derivatives, except for embedded derivatives and longevity and mortality swaps, are carried on the Company’s condensed consolidated balance sheets in other invested assets or other liabilities, at fair value. Longevity and mortality swaps are included on the condensed consolidated balance sheets in other assets or other liabilities, at fair value. Embedded derivative assets and liabilities on modified coinsurance or funds withheld arrangements are included on the condensed consolidated balance sheets with the host contract in funds withheld at interest, at fair value. Embedded derivative liabilities on indexed annuity and variable annuity products are included on the condensed consolidated balance sheets with the host contract in interest-sensitive contract liabilities, at fair value. The following table presents the notional amounts and gross fair value of derivative instruments prior to taking into account the netting effects of master netting agreements as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018						December 31, 2017
	Notional		Carrying Value/Fair Value				Notional		Carrying Value/Fair Value
	Amount		Assets		Liabilities		Amount		Assets		Liabilities
Derivatives not designated as hedging instruments:
Interest rate swaps	$	1,074,173	$	37,238	$	1,818	$	996,204	$	59,809	$	2,372
Financial futures	347,916		—		—		412,438		—		—
Foreign currency forwards	—		—		—		6,030		—		28
Consumer price index swaps	409,023		127		2,836		221,932		—		2,160
Credit default swaps	1,373,300		6,759		114		961,200		8,319		1,651
Equity options	571,845		19,372		—		632,251		23,271		—
Longevity swaps	928,320		46,090		—		960,400		40,659		—
Mortality swaps	25,000		—		308		—		—		1,683
Synthetic guaranteed investment contracts	10,844,558		—		—		10,052,576		—		—
Embedded derivatives in:
Modified coinsurance or funds withheld arrangements	—		142,529		—		—		122,194		—
Indexed annuity products	—		—		815,970		—		—		861,758
Variable annuity products	—		—		90,229		—		—		152,470
Total non-hedging derivatives	15,574,135		252,115		911,275		14,243,031		254,252		1,022,122
Derivatives designated as hedging instruments:
Interest rate swaps	435,000		99		20,579		435,000		—		20,389
Foreign currency swaps	537,249		46,141		3,770		672,921		65,207		8,496
Foreign currency forwards	834,238		8,948		2,067		553,175		1,265		7,720
Total hedging derivatives	1,806,487		55,188		26,416		1,661,096		66,472		36,605
Total derivatives	$	17,380,622	$	307,303	$	937,691	$	15,904,127	$	320,724	$	1,058,727

Netting Arrangements

Certain of the Company’s derivatives are subject to enforceable master netting arrangements and reported as a net asset or liability in the condensed consolidated balance sheets. The Company nets all derivatives that are subject to such arrangements.

The Company has elected to include all derivatives, except embedded derivatives, in the tables below, irrespective of whether they are subject to an enforceable master netting arrangement or a similar agreement. See Note 4 – “Investments” for information regarding the Company’s securities borrowing, lending, repurchase and repurchase/reverse repurchase programs. See “Embedded Derivatives” below for information regarding the Company’s bifurcated embedded derivatives.

The following table provides information relating to the Company’s derivative instruments as of September 30, 2018 and December 31, 2017 (dollars in thousands):

								Gross Amounts Not Offset in the Balance Sheet
	Gross Amounts    Recognized		Gross Amounts Offset in the Balance Sheet			Net Amounts Presented in the Balance Sheet		Financial Instruments (1)			Cash Collateral    Pledged/ Received			Net Amount
September 30, 2018:
Derivative assets	$	164,774	$	(17,560	)	$	147,214	$	—		$	(159,194	)	$	(11,980	)
Derivative liabilities	31,492		(17,560		)	13,932		(61,293		)	(13,400		)	(60,761		)
December 31, 2017:
Derivative assets	$	198,530	$	(20,258	)	$	178,272	$	(862	)	$	(185,900	)	$	(8,490	)
Derivative liabilities	44,499		(20,258		)	24,241		(58,156		)	(22,221		)	(56,136		)

(1) Includes initial margin posted to a central clearing partner.

Accounting for Derivative Instruments and Hedging Activities

The Company does not enter into derivative instruments for speculative purposes. As discussed below under “Non-qualifying Derivatives and Derivatives for Purposes Other Than Hedging,” the Company uses various derivative instruments for risk management purposes that either do not qualify or have not been qualified for hedge accounting treatment. As of September 30, 2018 and December 31, 2017, the Company held interest rate swaps that were designated and qualified as cash flow hedges of interest rate risk, for variable rate liabilities and foreign currency assets, foreign currency swaps and foreign currency forwards that were designated and qualified as hedges of a portion of its net investment in its foreign operations, foreign currency swaps that were designated and qualified as fair value hedges of foreign currency risk, and derivative instruments that were not designated as hedging instruments. See Note 2 – “Summary of Significant Accounting Policies” of the Company’s 2017 Annual Report for a detailed discussion of the accounting treatment for derivative instruments, including embedded derivatives. Derivative instruments are carried at fair value and generally require an insignificant amount of cash at inception of the contracts.

Fair Value Hedges

The Company designates and reports certain foreign currency swaps to hedge the foreign currency fair value exposure of foreign currency denominated assets as fair value hedges when they meet the requirements of the general accounting principles for Derivatives and Hedging. The gain or loss on the hedged item attributable to a change in foreign currency and the offsetting gain or loss on the related foreign currency swaps as of September 30, 2018 and 2017, were (dollars in thousands):

Type of Fair Value Hedge	Hedged Item	Gains (Losses) Recognized for Derivatives (1)			Gains (Losses) Recognized for Hedged Items (1)
For the three months ended September 30, 2018:
Foreign currency swaps	Foreign-denominated fixed maturity securities	$	(2,258	)	$	2,832
For the three months ended September 30, 2017:
Foreign currency swaps	Foreign-denominated fixed maturity securities	$	2,100		$	(2,100	)
For the nine months ended September 30, 2018:
Foreign currency swaps	Foreign-denominated fixed maturity securities	$	(5,284	)	$	9,666
For the nine months ended September 30, 2017:
Foreign currency swaps	Foreign-denominated fixed maturity securities	$	9,541		$	(9,541	)

(1) The net amount represents the ineffective portion of the fair value hedges

Cash Flow Hedges

Certain derivative instruments are designated as cash flow hedges when they meet the requirements of the general accounting principles for Derivatives and Hedging. The Company designates and accounts for the following as cash flows: (i) certain interest rate swaps, in which the cash flows of liabilities are variable based on a benchmark rate; (ii) certain interest rate swaps, in which the cash flows of assets are denominated in different currencies, commonly referred to as cross-currency swaps; and (iii) forward bond purchase commitments.

The following table presents the components of AOCI, before income tax, and the condensed consolidated income statement classification where the gain or loss is recognized related to cash flow hedges for the three and nine months ended September 30, 2018 and 2017 (dollars in thousands):

	Three months ended September 30,
	2018			2017
Balance beginning of period	$	22,656		$	7,690
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	6,671			(6,889		)
Amounts reclassified to investment related (gains) losses, net	—			(183		)
Amounts reclassified to investment income	(50		)	(271		)
Amounts reclassified to interest expense	(234		)	—
Balance end of period	$	29,043		$	347
	Nine months ended September 30,
	2018			2017
Balance beginning of period	$	2,619		$	(2,496	)
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	26,586			3,689
Amounts reclassified to investment related (gains) losses, net	—			(142		)
Amounts reclassified to investment income	(270		)	(704		)
Amounts reclassified to interest expense	108			—
Balance end of period	$	29,043		$	347

As of September 30, 2018, the before-tax deferred net gains (losses) on derivative instruments recorded in AOCI that are expected to be reclassified to earnings during the next twelve months are approximately $0.2 million and $1.9 million in investment income and interest expense, respectively.

The following table presents the effective portion of derivatives in cash flow hedging relationships on the condensed consolidated statements of income and the condensed consolidated statements of comprehensive income for the three and nine months ended September 30, 2018 and 2017 (dollars in thousands):

	Effective Portion
Derivative Type	Gain (Loss) Deferred in OCI			Gain (Loss) Reclassified into Income from OCI
				Investment Related Gains (Losses)		Investment Income		Interest Expense
For the three months ended September 30, 2018:
Interest rate	$	7,490		$	—	$	—	$	234
Currency/Interest rate	(819		)	—		50		—
Total	$	6,671		$	—	$	50	$	234
For the three months ended September 30, 2017:
Interest rate	$	(8,421	)	$	—	$	—	$	—
Currency/Interest rate	1,544			—		230		—
Forward bond purchase commitments	(12		)	183		41		—
Total	$	(6,889	)	$	183	$	271	$	—
For the nine months ended September 30, 2018:
Interest rate	$	27,217		$	—	$	—	$	(108	)
Currency/Interest rate	(631		)	—		270		—
Total	$	26,586		$	—	$	270	$	(108	)
For the nine months ended September 30, 2017:
Interest rate	$	(6,205	)	$	—	$	—	$	—
Currency/Interest rate	9,894			—		560		—
Forward bond purchase commitments	—			142		144		—
Total	$	3,689		$	142	$	704	$	—

For the three and nine months ended September 30, 2018 and 2017, the ineffective portion of derivatives reported as cash flow hedges was not material to the Company’s results of operations. Also, there were no material amounts reclassified into earnings relating to instances in which the Company discontinued cash flow hedge accounting because the forecasted transaction did not occur by the anticipated date or within the additional time period permitted by the authoritative guidance for the accounting for derivatives and hedging.

Hedges of Net Investments in Foreign Operations

The Company uses foreign currency swaps and foreign currency forwards to hedge a portion of its net investment in certain foreign operations against adverse movements in exchange rates. The following table illustrates the Company’s net investments in foreign operations (“NIFO”) hedges for the three and nine months ended September 30, 2018 and 2017 (dollars in thousands):

	Derivative Gains (Losses) Deferred in AOCI
	For the three months ended September 30,						For the nine months ended September 30,
Type of NIFO Hedge (1) (2)	2018			2017			2018		2017
Foreign currency swaps	$	(5,877	)	$	(35,198	)	$	11,125	$	(60,723	)
Foreign currency forwards	(11,562		)	4,627			11,737		8,785
Total	$	(17,439	)	$	(30,571	)	$	22,862	$	(51,938	)

(1) There were no sales or substantial liquidations of net investments in foreign operations that would have required the reclassification of gains or losses from accumulated other comprehensive income (loss) into investment income during the periods presented.

(2) There was no ineffectiveness recognized for the Company’s hedges of net investments in foreign operations.

The cumulative foreign currency translation gain recorded in AOCI related to these hedges was $136.5 million and $113.7 million at September 30, 2018 and December 31, 2017, respectively. If a hedged foreign operation was sold or substantially liquidated, the amounts in AOCI would be reclassified to the condensed consolidated statements of income. A pro rata portion would be reclassified upon partial sale of a hedged foreign operation.

Non-qualifying Derivatives and Derivatives for Purposes Other Than Hedging

The Company uses various other derivative instruments for risk management purposes that either do not qualify or have not been qualified for hedge accounting treatment. The gain or loss related to the change in fair value for these derivative instruments is recognized in investment related gains (losses), net in the condensed consolidated statements of income, except where otherwise noted.

A summary of the effect of non-hedging derivatives, including embedded derivatives, on the Company’s condensed consolidated statements of income for the three and nine months ended September 30, 2018 and 2017 is as follows (dollars in thousands):

		Gain (Loss) for the three months ended September 30,
Type of Non-hedging Derivative	Income Statement Location of Gain (Loss)	2018			2017
Interest rate swaps	Investment related gains (losses), net	$	(12,228	)	$	641
Financial futures	Investment related gains (losses), net	(6,544		)	(8,890		)
Foreign currency forwards	Investment related gains (losses), net	(58		)	24
CPI swaps	Investment related gains (losses), net	(4,223		)	220
Credit default swaps	Investment related gains (losses), net	4,689			4,137
Equity options	Investment related gains (losses), net	(9,793		)	(8,295		)
Longevity swaps	Other revenues	2,426			3,334
Mortality swaps	Other revenues	473			(132		)
Subtotal		(25,258		)	(8,961		)
Embedded derivatives in:
Modified coinsurance or funds withheld arrangements	Investment related gains (losses), net	(2,081		)	23,044
Indexed annuity products	Interest credited	(25,347		)	(13,133		)
Variable annuity products	Investment related gains (losses), net	32,133			(6,205		)
Total non-hedging derivatives		$	(20,553	)	$	(5,255	)
		Gain (Loss) for the nine months ended         September 30,
Type of Non-hedging Derivative	Income Statement Location of Gain (Loss)	2018			2017
Interest rate swaps	Investment related gains (losses), net	$	(47,399	)	$	12,318
Financial futures	Investment related gains (losses), net	(7,312		)	(28,107		)
Foreign currency forwards	Investment related gains (losses), net	3			577
CPI swaps	Investment related gains (losses), net	(996		)	211
Credit default swaps	Investment related gains (losses), net	5,371			15,374
Equity options	Investment related gains (losses), net	(15,207		)	(34,757		)
Longevity swaps	Other revenues	6,983			7,180
Mortality swaps	Other revenues	(326		)	(921		)
Subtotal		(58,883		)	(28,125		)
Embedded derivatives in:
Modified coinsurance or funds withheld arrangements	Investment related gains (losses), net	20,335			106,854
Indexed annuity products	Interest credited	6,523			(35,490		)
Variable annuity products	Investment related gains (losses), net	62,242			16,518
Total non-hedging derivatives		$	30,217		$	59,757

Types of Derivatives Used by the Company

Interest Rate Swaps

Interest rate swaps are used by the Company primarily to reduce market risks from changes in interest rates, to alter interest rate exposure arising from mismatches between assets and liabilities (duration mismatches) and to manage the risk of cash flows of liabilities that are variable based on a benchmark rate. With an interest rate swap, the Company agrees with another party to exchange, at specified intervals, the difference between two rates, which can be either fixed-rate or floating-rate interest amounts, tied to an agreed-upon notional principal amount. These transactions are executed pursuant to master agreements that provide for a single net payment or individual gross payments at each due date. The Company utilizes interest rate swaps in cash flow and non-qualifying hedging relationships.

Financial Futures

Exchange-traded futures are used primarily to economically hedge liabilities embedded in certain variable annuity products. With exchange-traded futures transactions, the Company agrees to purchase or sell a specified number of contracts, the value of which is determined by the relevant indices, and to post variation margin on a daily basis in an amount equal to the difference between the daily estimated fair values of those contracts. The Company enters into exchange-traded futures with regulated futures commission merchants that are members of the exchange.

Equity Options

Equity index options are used by the Company primarily to hedge minimum guarantees embedded in certain variable annuity products. To hedge against adverse changes in equity indices volatility, the Company buys put options. The contracts are net settled in cash based on differentials in the indices at the time of exercise and the strike price.

Consumer Price Index Swaps

Consumer price index (“CPI”) swaps are used by the Company primarily to economically hedge liabilities embedded in certain insurance products where value is directly affected by changes in a designated benchmark consumer price index. With a CPI swap transaction, the Company agrees with another party to exchange the actual amount of inflation realized over a specified period of time for a fixed amount of inflation determined at inception. These transactions are executed pursuant to master agreements that provide for a single net payment or individual gross payments to be made by the counterparty at each due date. Most of these swaps will require a single payment to be made by one counterparty at the maturity date of the swap.

Foreign Currency Swaps

Foreign currency swaps are used by the Company to reduce the risk from fluctuations in foreign currency exchange rates associated with its assets and liabilities denominated in foreign currencies. With a foreign currency swap transaction, the Company agrees with another party to exchange, at specified intervals, the difference between one currency and another at a forward exchange rate calculated by reference to an agreed upon principal amount. The principal amount of each currency is exchanged at the termination of the currency swap by each party. The Company uses foreign currency swaps in hedges of net investments in foreign operations and non-qualifying hedge relationships.

Foreign Currency Forwards

Foreign currency forwards are used by the Company to reduce the risk from fluctuations in foreign currency exchange rates associated with its assets and liabilities denominated in foreign currencies. With a foreign currency forward transaction, the Company agrees with another party to deliver a specified amount of an identified currency at a specified future date. The price is agreed upon at the time of the contract and payment for such a contract is made in a different currency at the specified future date. The Company uses foreign currency forwards in hedges of net investments in foreign operations and non-qualifying hedge relationships.

Forward Bond Purchase Commitments

Forward bond purchase commitments have been used by the Company to hedge against the variability in the anticipated cash flows required to purchase securities. With forward bond purchase commitments, the forward price is agreed upon at the time of the contract and payment for such contract is made at the future specified settlement date of the securities.

Credit Default Swaps

The Company sells protection under single name credit default swaps and credit default swap index tranches to diversify its credit risk exposure in certain portfolios and, in combination with purchasing securities, to replicate characteristics of similar investments based on the credit quality and term of the credit default swap. Credit default triggers for indexed reference entities and single name reference entities are defined in the contracts. The Company’s maximum exposure to credit loss equals the notional value for credit default swaps. In the event of default of a referencing entity, the Company is typically required to pay the protection holder the full notional value less a recovery amount determined at auction.

The following table presents the estimated fair value, maximum amount of future payments and weighted average years to maturity of credit default swaps sold by the Company at September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018						December 31, 2017
Rating Agency Designation of Referenced Credit Obligations(1)	Estimated Fair Value of Credit   Default Swaps			Maximum Amount of Future Payments under Credit Default Swaps(2)		Weighted Average Years to Maturity(3)	Estimated Fair Value of Credit   Default Swaps			Maximum Amount of Future Payments under Credit Default Swaps(2)		Weighted Average Years to Maturity(3)
AAA/AA+/AA/AA-/A+/A/A-
Single name credit default swaps	$	2,470		$	152,000	2.5	$	3,128		$	162,000	2.9
Subtotal	2,470			152,000		2.5	3,128			162,000		2.9
BBB+/BBB/BBB-
Single name credit default swaps	4,220			343,700		2.4	4,469			361,700		2.9
Credit default swaps referencing indices	(80		)	642,600		3.4	(55		)	422,600		4.0
Subtotal	4,140			986,300		3.1	4,414			784,300		3.5
BB+/BB/BB-
Single name credit default swaps	32			15,000		1.0	30			5,000		1.5
Subtotal	32			15,000		1.0	30			5,000		1.5
Total	$	6,642		$	1,153,300	3.0	$	7,572		$	951,300	3.4

(1) The rating agency designations are based on ratings from Standard and Poor’s (“S&P”).

(2) Assumes the value of the referenced credit obligations is zero.

(3) The weighted average years to maturity of the credit default swaps is calculated based on weighted average notional amounts.

The Company also purchases credit default swaps to reduce its risk against a drop in bond prices due to credit concerns of certain bond issuers. If a credit event, as defined by the contract, occurs, the Company is able to put the bond back to the counterparty at par.

Longevity Swaps

The Company enters into longevity swaps in the form of out-of-the-money options, which provide protection against changes in mortality improvement to retirement plans and insurers of such plans. With a longevity swap transaction, the Company agrees with another party to exchange a proportion of a notional value. The proportion is determined by the difference between a predefined benefit, and the realized benefit plus the future expected benefit, calculated by reference to a population index for a fixed premium.

Mortality Swaps

Mortality swaps are used by the Company to hedge risk from changes in mortality experience associated with its reinsurance of life insurance risk. The Company agrees with another party to exchange, at specified intervals, a proportion of a notional value determined by the difference between a predefined expected and realized claim amount on a designated index of reinsured lives, for a fixed percentage (premium) each term.

Synthetic Guaranteed Investment Contracts

The Company sells fee-based synthetic guaranteed investment contracts to retirement plans which include investment-only, stable value contracts. The assets are owned by the trustees of such plans, who invest the assets under the terms of investment guidelines to which the Company agrees. The contracts contain a guarantee of a minimum rate of return on participant balances supported by the underlying assets, and a guarantee of liquidity to meet certain participant-initiated plan cash flow requirements. These contracts are reported as derivatives and recorded at fair value.

Embedded Derivatives

The Company has certain embedded derivatives which are required to be separated from their host contracts and reported as derivatives. Host contracts include reinsurance treaties structured on a modified coinsurance (“modco”) or funds withheld basis. Additionally, the Company reinsures equity-indexed annuity and variable annuity contracts with benefits that are considered embedded derivatives, including guaranteed minimum withdrawal benefits, guaranteed minimum accumulation benefits, and guaranteed minimum income benefits. The changes in fair values of embedded derivatives on equity-indexed annuities described below relate to changes in the fair value associated with capital market and other related assumptions. The Company’s utilization of a credit valuation adjustment (“CVA”) did not have a material effect on the change in fair value of its embedded derivatives for the three and nine months ended September 30, 2018 and 2017.

The related gains (losses) and the effect on net income after amortization of deferred acquisition costs (“DAC”) and income taxes for the three and nine months ended September 30, 2018 and 2017 are reflected in the following table (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Embedded derivatives in modco or funds withheld arrangements included in investment related gains	$	(2,081	)	$	23,044		$	20,335		$	106,854
After the associated amortization of DAC and taxes, the related amounts included in net income	(1,320		)	7,515			11,517			36,300
Embedded derivatives in variable annuity contracts included in investment related gains	32,133			(6,205		)	62,242			16,518
After the associated amortization of DAC and taxes, the related amounts included in net income	9,463			(1,074		)	33,061			30,785
Amounts related to embedded derivatives in equity-indexed annuities included in benefits and expenses	(25,347		)	(13,133		)	6,523			(35,490		)
After the associated amortization of DAC and taxes, the related amounts included in net income	(17,311		)	(9,737		)	(6,808		)	(38,059		)

Credit Risk

The Company manages its credit risk related to over-the-counter (“OTC”) derivatives by entering into transactions with creditworthy counterparties, maintaining collateral arrangements and through the use of master netting agreements that provide for a single net payment to be made by one counterparty to another at each due date and upon termination.

The credit exposure of the Company’s OTC derivative transactions is represented by the contracts with a positive fair value (market value) at the reporting date. To reduce credit exposures, the Company seeks to (i) enter into OTC derivative transactions pursuant to master netting agreements that provide for a netting of payments and receipts with a single counterparty, and (ii) enter into agreements that allow the use of credit support annexes, which are bilateral rating-sensitive agreements that require collateral postings at established threshold levels. Certain of the Company’s OTC derivatives are cleared derivatives, which are bilateral transactions between the Company and a counterparty where the transactions are cleared through a clearinghouse, such that each derivative counterparty is only exposed to the default of the clearinghouse. These cleared transactions require initial and daily variation margin collateral postings and include certain interest rate swaps and credit default swaps entered into on or after June 10, 2013, related to guidelines implemented under the Dodd-Frank Wall Street Reform and Consumer Protection Act. In 2017, the Company followed the Chicago Mercantile Exchange amended rulebook to legally characterize variation margin payments as settlements of the derivative’s mark-to-market exposure and not collateral. Also, the Company enters into exchange-traded futures through regulated exchanges and these transactions are settled on a daily basis, thereby reducing credit risk exposure in the event of non-performance by counterparties to such financial instruments.

The Company enters into various collateral arrangements, which require both the posting and accepting of collateral in connection with its derivative instruments. Collateral agreements contain attachment thresholds that may vary depending on the posting party’s ratings. Additionally, a decline in the Company’s or the counterparty’s credit ratings to specified levels could result in potential settlement of the derivative positions under the Company’s agreements with its counterparties. The Company also has exchange-traded futures, which require the maintenance of a margin account. As exchange-traded futures are affected through regulated exchanges, and positions are marked to market on a daily basis, the Company has minimal exposure to credit-related losses in the event of nonperformance by counterparties.

The Company’s credit exposure related to derivative contracts is generally limited to the fair value at the reporting date plus or minus any collateral posted or held by the Company. The Company’s credit exposure to mortality swaps is minimal, as they are fully collateralized by a counterparty. Information regarding the Company’s credit exposure related to its over-the-counter derivative contracts, centrally cleared derivative contracts and margin account for exchange-traded futures, excluding mortality swaps, at September 30, 2018 and December 31, 2017 are reflected in the following table (dollars in thousands):

	September 30, 2018			December 31, 2017
Estimated fair value of derivatives in net asset position	$	133,590		$	155,714
Cash provided as collateral(1)	13,400			22,221
Securities pledged to counterparties as collateral(2)	61,293			58,156
Cash pledged from counterparties as collateral(3)	(159,194		)	(185,900		)
Securities pledged from counterparties as collateral(4)	—			(862		)
Initial margin for cleared derivatives(2)	(61,293		)	(58,156		)
Net amount after application of master netting agreements and collateral	$	(12,204	)	$	(8,827	)
Margin account related to exchange-traded futures(5)	$	8,348		$	6,538

(1) Consists of receivable from counterparty, included in other assets.

(2) Included in available-for-sale securities, primarily consists of U.S. Treasury and government agency securities.

(3) Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities.

(4) Consists of U.S. Treasury and government securities.

(5) Included in other assets.

XML

Fair Value of Assets and Liabilities

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Disclosures

Fair Value of Assets and Liabilities

Fair Value Measurement

General accounting principles for Fair Value Measurements and Disclosures define fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. These principles also establish a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value and describes three levels of inputs that may be used to measure fair value:

Level 1 - Unadjusted quoted prices in active markets for identical assets or liabilities. The Company’s Level 1 assets and liabilities are traded in active exchange markets.

Level 2 - Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or market standard valuation techniques and assumptions that use significant inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the related assets or liabilities. Prices are determined using valuation methodologies such as discounted cash flow models and other similar techniques that require management’s judgment or estimation in developing inputs that are consistent with those other market participants would use when pricing similar assets and liabilities. Additionally, the Company’s embedded derivatives, all of which are associated with reinsurance treaties and longevity and mortality swaps, are classified in Level 3 since their values include significant unobservable inputs.

For a discussion of the Company’s valuation methodologies for assets and liabilities measured at fair value and the fair value hierarchy, see Note 6 in the Notes to Consolidated Financial Statements included in the Company’s 2017 Annual Report.

Assets and Liabilities by Hierarchy Level

Assets and liabilities measured at fair value on a recurring basis as of September 30, 2018 and December 31, 2017 are summarized below (dollars in thousands):

September 30, 2018:				Fair Value Measurements Using:
	Total			Level 1		Level 2			Level 3
Assets:
Fixed maturity securities – available-for-sale:
Corporate	$	24,449,498		$	—	$	23,193,563		$	1,255,935
Canadian government	4,036,750			—		3,488,008			548,742
RMBS	1,780,762			—		1,780,762			—
ABS	1,863,017			—		1,780,250			82,767
CMBS	1,273,534			—		1,271,752			1,782
U.S. government	1,412,409			1,284,932		107,225			20,252
State and political subdivisions	911,991			—		898,346			13,645
Other foreign government	3,277,251			—		3,272,239			5,012
Total fixed maturity securities – available-for-sale	39,005,212			1,284,932		35,792,145			1,928,135
Equity securities	101,069			57,584		—			43,485
Funds withheld at interest – embedded derivatives	142,529			—		—			142,529
Cash equivalents	657,280			657,280		—			—
Short-term investments	186,051			5,957		177,891			2,203
Other invested assets:
Derivatives:
Interest rate swaps	29,106			—		29,106			—
Foreign currency forwards	6,881			—		6,881			—
CPI swaps	(13		)	—		(13		)	—
Credit default swaps	5,961			—		5,961			—
Equity options	16,818			—		16,818			—
Foreign currency swaps	42,371			—		42,371			—
FVO contractholder-directed unit-linked investments	212,315			211,253		1,062			—
Total other invested assets	313,439			211,253		102,186			—
Other assets - longevity swaps	46,090			—		—			46,090
Total	$	40,451,670		$	2,217,006	$	36,072,222		$	2,162,442
Liabilities:
Interest sensitive contract liabilities – embedded derivatives	$	906,199		$	—	$	—		$	906,199
Other liabilities:
Derivatives:
Interest rate swaps	14,166			—		14,166			—
CPI swaps	2,696			—		2,696			—
Credit default swaps	(684		)	—		(684		)	—
Equity options	(2,554		)	—		(2,554		)	—
Mortality swaps	308			—		—			308
Total	$	920,131		$	—	$	13,624		$	906,507

December 31, 2017:				Fair Value Measurements Using:
	Total			Level 1		Level 2			Level 3
Assets:
Fixed maturity securities – available-for-sale:
Corporate	$	23,210,968		$	—	$	21,873,696		$	1,337,272
Canadian government	4,220,076			—		3,626,134			593,942
RMBS	1,719,880			—		1,611,998			107,882
ABS	1,648,362			—		1,524,888			123,474
CMBS	1,303,387			—		1,300,153			3,234
U.S. government	1,943,592			1,818,006		103,075			22,511
State and political subdivisions	703,428			—		662,225			41,203
Other foreign government	3,401,127			—		3,396,035			5,092
Total fixed maturity securities – available-for-sale	38,150,820			1,818,006		34,098,204			2,234,610
Equity securities:
Non-redeemable preferred stock	39,806			39,806		—			—
Other equity securities	60,346			60,346		—			—
Funds withheld at interest – embedded derivatives	122,194			—		—			122,194
Cash equivalents	356,788			354,071		2,717			—
Short-term investments	50,746			—		47,650			3,096
Other invested assets:
Derivatives:
Interest rate swaps	51,359			—		51,359			—
Foreign currency forwards	730			—		730			—
CPI swaps	(221		)	—		(221		)	—
Credit default swaps	5,908			—		5,908			—
Equity options	16,932			—		16,932			—
Foreign currency swaps	62,905			—		62,905			—
FVO contractholder-directed unit-linked investments	218,541			217,618		923			—
Total other invested assets	356,154			217,618		138,536			—
Other assets - longevity swaps	40,659			—		—			40,659
Total	$	39,177,513		$	2,489,847	$	34,287,107		$	2,400,559
Liabilities:
Interest sensitive contract liabilities – embedded derivatives	$	1,014,228		$	—	$	—		$	1,014,228
Other liabilities:
Derivatives:
Interest rate swaps	14,311			—		14,311			—
Foreign currency forwards	7,213			—		7,213			—
CPI swaps	1,939			—		1,939			—
Credit default swaps	(760		)	—		(760		)	—
Equity options	(6,339		)	—		(6,339		)	—
Foreign currency swaps	6,194			—		6,194			—
Mortality swaps	1,683			—		—			1,683
Total	$	1,038,469		$	—	$	22,558		$	1,015,911

Transfers between Levels 1 and 2

Transfers between Levels 1 and 2 are made to reflect changes in observability of inputs and market activity. There were no transfers between Level 1 and Level 2 for the nine months ended September 30, 2018. The Company recognizes transfers of assets and liabilities into and out of levels within the fair value hierarchy at the beginning of the quarter in which the actual event or change in circumstances that caused the transfer occurs. The following tables present the transfers between Level 1 and Level 2 during the three and nine months ended September 30, 2017 (dollars in thousands):

	2017
	Transfers from     Level 1 to Level 2		Transfers from     Level 2 to Level 1
Three months ended September 30:
Fixed maturity securities - available-for-sale:
Corporate securities	$	—	$	—
Nine months ended September 30:
Fixed maturity securities - available-for-sale:
Corporate securities	$	—	$	88,674

Quantitative Information Regarding Internally - Priced Level 3 Assets and Liabilities

The following table presents quantitative information about significant unobservable inputs used in Level 3 fair value measurements that are developed internally by the Company as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	Estimated Fair Value				Valuation Technique	Unobservable Inputs	Range (Weighted Average)
	September 30, 2018		December 31, 2017				September 30, 2018		December 31, 2017
Assets:
Corporate	$	630,328	$	173,579	Market comparable securities	Liquidity premium	0-5% (1%)		0-2%  (1%)
						EBITDA Multiple	5.9x-7.5x (6.9x)		—
ABS	64,475		—		Market comparable securities	Liquidity premium	0-1% (1%)		—
U.S. government	20,252		22,511		Market comparable securities	Liquidity premium	0-1% (1%)		0-1%  (1%)
State and political subdivisions	—		4,616		Market comparable securities	Liquidity premium	—		1	%
Other foreign government	5,012		—		Market comparable securities	Liquidity premium	1	%	—
Equity securities	33,074		—		Market comparable securities	Liquidity premium	4	%	—
						EBITDA Multiple	6.9x-12.3x (7.9x)		—
					Discounted cash flow	Discount rate	20	%
Funds withheld at interest- embedded derivatives	142,529		122,194		Total return swap	Mortality	0-100%  (2%)		0-100%  (2%)
						Lapse	0-35%  (9%)		0-35%  (9%)
						Withdrawal	0-5%  (3%)		0-5%  (3%)
						CVA	0-5%  (1%)		0-5%  (1%)
						Crediting rate	2-4%  (2%)		2-4%  (2%)
Longevity swaps	46,090		40,659		Discounted cash flow	Mortality	0-100%  (2%)		0-100%  (2%)
						Mortality improvement	(10%)-10%  (3%)		(10%)-10%  (3%)
Liabilities:
Interest sensitive contract liabilities- embedded derivatives- indexed annuities	815,970		861,758		Discounted cash flow	Mortality	0-100% (2%)		0-100% (2%)
						Lapse	0-35% (9%)		0-35% (9%)
						Withdrawal	0-5% (3%)		0-5% (3%)
						Option budget projection	2-4% (2%)		2-4% (2%)
Interest sensitive contract liabilities- embedded derivatives- variable annuities	90,229		152,470		Discounted cash  flow	Mortality	0-100% (1%)		0-100% (1%)
						Lapse	0-25% (5%)		0-25% (5%)
						Withdrawal	0-7% (4%)		0-7% (3%)
						CVA	0-5% (1%)		0-5% (1%)
						Long-term volatility	0-27% (13%)		0-27% (8%)
Mortality swaps	308		1,683		Discounted cash flow	Mortality	0-100%  (1%)		0-100%  (1%)

Changes in Level 3 Assets and Liabilities

Assets and liabilities transferred into Level 3 are due to a lack of observable market transactions and price information. Assets and liabilities are transferred out of Level 3 when circumstances change such that significant inputs can be corroborated with market observable data. This may be due to a significant increase in market activity for the asset or liability, a specific event, one or more significant input(s) becoming observable. Transfers out of Level 3 were primarily the result of the Company obtaining observable pricing information or a third party pricing quotation that appropriately reflects the fair value of those assets and liabilities. The Company also transferred equity securities with a fair value of approximately $38.9 million into Level 3 as a result of the adoption of the new accounting guidance for the recognition and measurement of equity securities.

For further information on the Company’s valuation processes, see Note 6 in the Notes to Consolidated Financial Statements included in the Company’s 2017 Annual Report.

The reconciliations for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) are as follows (dollars in thousands):

For the three months ended September 30, 2018:	Fixed maturity securities - available-for-sale
	Corporate			Canadian government			RMBS			ABS
Fair value, beginning of period	$	1,367,154		$	572,698		$	54,839		$	70,686
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	(156		)	3,520			3			20
Investment related gains (losses), net	239			—			—			626
Included in other comprehensive income	(4,858		)	(27,476		)	(1		)	(130		)
Purchases(1)	123,808			—			—			11,099
Sales(1)	(62,047		)	—			—			(462		)
Settlements(1)	(101,868		)	—			(3		)	(24,166		)
Transfers into Level 3	2,782			—			—			64,009
Transfers out of Level 3	(69,119		)	—			(54,838		)	(38,915		)
Fair value, end of period	$	1,255,935		$	548,742		$	—		$	82,767
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	(180	)	$	3,520		$	—		$	13
Investment related gains (losses), net	(1,430		)	—			—			—

For the three months ended September 30, 2018 (continued):	Fixed maturity securities available-for-sale
	CMBS			U.S. government			State and political subdivisions			Other foreign government
Fair value, beginning of period	$	1,867		$	20,735		$	16,505		$	5,044
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	—			(107		)	6			—
Included in other comprehensive income	7			(122		)	(544		)	(32		)
Purchases(1)	—			120			—			—
Settlements(1)	(1		)	(374		)	(37		)	—
Transfers into Level 3	1,752			—			9,859			—
Transfers out of Level 3	(1,843		)	—			(12,144		)	—
Fair value, end of period	$	1,782		$	20,252		$	13,645		$	5,012
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	—		$	(107	)	$	6		$	—

For the three months ended September 30, 2018 (continued):	Equity securities			Funds withheld at interest- embedded derivatives			Short-term Investments			Other assets - longevity swaps			Interest sensitive contract liabilities embedded derivatives			Other liabilities - mortality swaps
Fair value, beginning of period	$	42,937		$	144,610		$	3,217		$	43,971		$	(928,797	)	$	(782	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment related gains (losses), net	5,532			(2,081		)	—			—			32,133			—
Interest credited	—			—			—			—			(25,348		)	—
Included in other comprehensive income	—			—			47			(307		)	—			1
Other revenues	—			—			—			2,426			—			473
Purchases(1)	863			—			1,721			—			(4,231		)	—
Sales(1)	(5,847		)	—			—			—			—			—
Settlements(1)	—			—			—			—			20,044			—
Transfers out of Level 3	—			—			(2,782		)	—			—			—
Fair value, end of period	$	43,485		$	142,529		$	2,203		$	46,090		$	(906,199	)	$	(308	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment related gains (losses), net	$	2,178		$	(2,081	)	$	—		$	—		$	30,433		$	—
Other revenues	—			—			—			2,426			—			473
Interest credited	—			—			—			—			(45,393		)	—

For the nine months ended September 30, 2018:	Fixed maturity securities - available-for-sale
	Corporate			Canadian government			RMBS			ABS
Fair value, beginning of period	$	1,337,272		$	593,942		$	107,882		$	123,474
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	(822		)	10,432			(132		)	202
Investment related gains (losses), net	(2,902		)	—			312			1,910
Included in other comprehensive income	(35,532		)	(55,632		)	(1,782		)	(821		)
Purchases(1)	379,476			—			45,328			22,099
Sales(1)	(79,316		)	—			(4,961		)	(462		)
Settlements(1)	(245,342		)	—			(4,538		)	(46,449		)
Transfers into Level 3	9,948			—			3,031			68,977
Transfers out of Level 3	(106,847		)	—			(145,140		)	(86,163		)
Fair value, end of period	$	1,255,935		$	548,742		$	—		$	82,767
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	(845	)	$	10,432		$	—		$	187
Investment related gains (losses), net	(4,571		)	—			—			—

For the nine months ended September 30, 2018 (continued):	Fixed maturity securities available-for-sale
	CMBS			U.S. government			State and political subdivisions			Other foreign government
Fair value, beginning of period	$	3,234		$	22,511		$	41,203		$	5,092
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	—			(324		)	4			—
Included in other comprehensive income	(56		)	(635		)	46			(80		)
Purchases(1)	—			334			—			—
Settlements(1)	(4		)	(1,634		)	(158		)	—
Transfers into Level 3	1,752			—			9,859			—
Transfers out of Level 3	(3,144		)	—			(37,309		)	—
Fair value, end of period	$	1,782		$	20,252		$	13,645		$	5,012
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	—		$	(325	)	$	3		$	—

For the nine months ended September 30, 2018 (continued):	Equity securities			Funds withheld at interest- embedded derivatives		Short-term Investments			Other assets - longevity swaps			Interest sensitive contract liabilities embedded derivatives			Other liabilities - mortality swaps
Fair value, beginning of period	$	—		$	122,194	$	3,096		$	40,659		$	(1,014,228	)	$	(1,683	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment related gains (losses), net	(2,067		)	20,335		—			—			62,242			—
Interest credited	—			—		—			—			6,523			—
Included in other comprehensive income	—			—		1			(1,552		)	—			1
Other revenues	—			—		—			6,983			—			(326		)
Purchases(1)	13,111			—		2,202			—			(16,946		)	—
Sales(1)	(6,416		)	—		—			—			—			—
Settlements(1)	(48		)	—		(314		)	—			56,210			1,700
Transfers into Level 3	38,905			—		—			—			—			—
Transfers out of Level 3	—			—		(2,782		)	—			—			—
Fair value, end of period	$	43,485		$	142,529	$	2,203		$	46,090		$	(906,199	)	$	(308	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment related gains (losses), net	$	(5,527	)	$	20,335	$	—		$	—		$	56,808		$	—
Other revenues	—			—		—			6,983			—			(326		)
Interest credited	—			—		—			—			(49,688		)	—

For the three months ended September 30, 2017:	Fixed maturity securities - available-for-sale
	Corporate			Canadian government			RMBS			ABS
Fair value, beginning of period	$	1,291,054		$	533,270		$	148,685		$	201,589
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	(383		)	3,460			(30		)	160
Investment related gains (losses), net	396			—			44			—
Included in other comprehensive income	(2,700		)	(11,365		)	104			(101		)
Purchases(1)	107,670			—			26,765			—
Sales(1)	(26,337		)	—			(3,553		)	—
Settlements(1)	(88,551		)	—			(3,645		)	(15,243		)
Transfers into Level 3	3,844			—			15			36,994
Transfers out of Level 3	(12,973		)	—			(50,390		)	(78,202		)
Fair value, end of period	$	1,272,020		$	525,365		$	117,995		$	145,197
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	(394	)	$	3,460		$	(27	)	$	156

For the three months ended September 30, 2017 (continued):	Fixed maturity securities available-for-sale
	CMBS			U.S. government			State and political subdivisions			Other foreign government
Fair value, beginning of period	$	1,943		$	23,567		$	34,434		$	11,994
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	—			(116		)	26			(1		)
Included in other comprehensive income	5			6			(208		)	(7		)
Purchases(1)	—			134			—			495
Settlements(1)	(1		)	(340		)	(35		)	—
Transfers into Level 3	—			—			7,295			—
Transfers out of Level 3	—			—			—			(6,853		)
Fair value, end of period	$	1,947		$	23,251		$	41,512		$	5,628
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	—		$	(116	)	$	26		$	(1	)

For the three months ended September 30, 2017 (continued):	Short-term Investments			Funds withheld at interest- embedded derivatives		Other assets - longevity swaps		Interest sensitive contract liabilities embedded derivatives			Other liabilities - mortality swaps
Fair value, beginning of period	$	3,548		$	61,281	$	33,349	$	(974,631	)	$	(1,552	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment related gains (losses), net	—			23,044		—		(10,047		)	—
Interest credited	—			—		—		(8,335		)	—
Included in other comprehensive income	(3		)	—		1,144		—			1
Other revenues	—			—		3,334		—			(132		)
Purchases(1)	3,164			—		—		(18,736		)	—
Settlements(1)	(114		)	—		—		21,809			—
Transfers out of Level 3	(3,236		)	—		—		—			—
Fair value, end of period	$	3,359		$	84,325	$	37,827	$	(989,940	)	$	(1,683	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment related gains (losses), net	$	—		$	23,044	$	—	$	(11,900	)	$	—
Other revenues	—			—		3,334		—			(132		)
Interest credited	—			—		—		(30,145		)	—

For the nine months ended September 30, 2017:	Fixed maturity securities - available-for-sale
	Corporate			Canadian government		RMBS			ABS
Fair value, beginning of period	$	1,272,253		$	475,965	$	160,291		$	219,280
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	(1,202		)	9,731		(304		)	1,689
Investment related gains (losses), net	7,592			—		524			—
Included in other comprehensive income	(2,300		)	39,669		2,716			6,802
Purchases(1)	257,671			—		72,582			45,215
Sales(1)	(49,511		)	—		(18,624		)	—
Settlements(1)	(234,552		)	—		(15,084		)	(60,966		)
Transfers into Level 3	35,042			—		5,515			75,752
Transfers out of Level 3	(12,973		)	—		(89,621		)	(142,575		)
Fair value, end of period	$	1,272,020		$	525,365	$	117,995		$	145,197
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	(1,213	)	$	9,731	$	(155	)	$	556
Investment related gains (losses), net	(2,788		)	—		(346		)	—

For the nine months ended September 30, 2017 (continued):	Fixed maturity securities available-for-sale
	CMBS			U.S. government			State and political subdivisions			Other foreign government
Fair value, beginning of period	$	21,145		$	24,488		$	41,666		$	12,869
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	709			(348		)	(68		)	(1		)
Investment related gains (losses), net	(595		)	—			—			—
Included in other comprehensive income	(57		)	269			(228		)	(210		)
Purchases(1)	—			370			—			495
Sales(1)	(3,720		)	—			—			—
Settlements(1)	(5,403		)	(1,528		)	(309		)	(672		)
Transfers into Level 3	—			—			7,295			—
Transfers out of Level 3	(10,132		)	—			(6,844		)	(6,853		)
Fair value, end of period	$	1,947		$	23,251		$	41,512		$	5,628
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	—		$	(348	)	$	(68	)	$	(1	)

For the nine months ended September 30, 2017 (continued):	Short-term Investments			Funds withheld at interest- embedded derivatives			Other assets - longevity swaps		Interest sensitive contract liabilities embedded derivatives			Other liabilities - mortality swaps
Fair value, beginning of period	$	3,346		$	(22,529	)	$	26,958	$	(990,308	)	$	(2,462	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment related gains (losses), net	—			106,854			—		9,005			—
Interest credited	—			—			—		(20,408		)	—
Included in other comprehensive income	1			—			3,689		—			1
Other revenues	—			—			7,180		—			(922		)
Purchases(1)	3,520			—			—		(51,276		)	—
Settlements(1)	(272		)	—			—		63,047			1,700
Transfers out of Level 3	(3,236		)	—			—		—			—
Fair value, end of period	$	3,359		$	84,325		$	37,827	$	(989,940	)	$	(1,683	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment related gains (losses), net	$	—		$	106,854		$	—	$	2,934		$	—
Other revenues	—			—			7,180		—			(922		)
Interest credited	—			—			—		(83,456		)	—

(1) The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.

Nonrecurring Fair Value Measurements

The following table presents information for assets measured at an estimated fair value on a nonrecurring basis during the periods presented and and still held at the reporting date (for example, when there is evidence of impairment). The estimated fair values for these assets were determined using significant unobservable inputs (Level 3).

	Carrying Value After Measurement				Net Investment Gains (Losses)
	At September 30,				Three months ended September 30,						Nine months ended September 30,
(dollars in thousands)	2018		2017		2018			2017			2018			2017
Limited partnership interests(1)	$	2,246	$	4,656	$	(1,860	)	$	(896	)	$	(1,860	)	$	(7,204	)
Private equities(2)	—		106		—			(531		)	—			(531		)

(1) The impaired limited partnership interests presented above were accounted for using the cost method. Impairments on these cost method investments were recognized at estimated fair value determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. The market for these investments has limited activity and price transparency.

(2) The fair value of the Company’s private equity investments is based on external valuation models.

Fair Value of Financial Instruments

The Company is required by general accounting principles for Fair Value Measurements and Disclosures to disclose the fair value of certain financial instruments including those that are not carried at fair value. The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments, which were not measured at fair value on a recurring basis, as of September 30, 2018 and December 31, 2017 (dollars in thousands). For additional information regarding the methods and significant assumptions used by the Company to estimate these fair values, see Note 6 in the Notes to Consolidated Financial Statements included in the Company’s 2017 Annual Report. This table excludes any payables or receivables for collateral under repurchase agreements and other transactions. The estimated fair value of the excluded amount approximates carrying value as they equal the amount of cash collateral received/paid.

September 30, 2018:	Carrying Value (1)		Estimated  Fair Value		Fair Value Measurement Using:
					Level 1		Level 2		Level 3		NAV
Assets:
Mortgage loans on real estate	$	4,779,074	$	4,652,481	$	—	$	—	$	4,652,481	$	—
Policy loans	1,320,050		1,320,050		—		1,320,050		—		—
Funds withheld at interest	5,833,925		6,040,671		—		—		6,040,671		—
Cash and cash equivalents	1,073,209		1,073,209		1,073,209		—		—		—
Short-term investments	43,877		43,877		43,877		—		—		—
Other invested assets	842,626		839,280		5,618		71,401		382,284		379,977
Accrued investment income	455,296		455,296		—		455,296		—		—
Liabilities:
Interest-sensitive contract liabilities	$	13,319,348	$	13,113,427	$	—	$	—	$	13,113,427	$	—
Long-term debt	2,787,975		2,850,344		—		—		2,850,344		—
Collateral finance and securitization notes	710,792		652,380		—		—		652,380		—
December 31, 2017:	Carrying Value (1)		Estimated Fair Value		Fair Value Measurement Using:
					Level 1		Level 2		Level 3		NAV
Assets:
Mortgage loans on real estate	$	4,400,533	$	4,477,654	$	—	$	—	$	4,477,654	$	—
Policy loans	1,357,624		1,357,624		—		1,357,624		—		—
Funds withheld at interest	5,955,092		6,275,623		—		—		6,275,623		—
Cash and cash equivalents	946,736		946,736		946,736		—		—		—
Short-term investments	42,558		42,558		42,558		—		—		—
Other invested assets	651,792		679,377		28,540		67,778		247,934		335,125
Accrued investment income	392,721		392,721		—		392,721		—		—
Liabilities:
Interest-sensitive contract liabilities	$	12,683,872	$	12,917,243	$	—	$	—	$	12,917,243	$	—
Long-term debt	2,788,365		2,959,912		—		—		2,959,912		—
Collateral finance and securitization notes	783,938		722,145		—		—		722,145		—

(1) Carrying values presented herein may differ from those in the Company’s condensed consolidated balance sheets because certain items within the respective financial statement captions may be measured at fair value on a recurring basis.

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Segment Information

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Segment Information

Segment Information

The accounting policies of the segments are the same as those described in the Summary of Significant Accounting Policies in Note 2 of the consolidated financial statements accompanying the 2017 Annual Report. The Company measures segment performance primarily based on profit or loss from operations before income taxes. There are no intersegment reinsurance transactions and the Company does not have any material long-lived assets.

The Company allocates capital to its segments based on an internally developed economic capital model, the purpose of which is to measure the risk in the business and to provide a basis upon which capital is deployed. The economic capital model considers the unique and specific nature of the risks inherent in the Company’s businesses. As a result of the economic capital allocation process, a portion of investment income is attributed to the segments based on the level of allocated capital. In addition, the segments are charged for excess capital utilized above the allocated economic capital basis. This charge is included in policy acquisition costs and other insurance expenses.

The Company has geographic-based and business-based operational segments. Geographic-based operations are further segmented into traditional and financial solutions businesses. Information related to revenues, income (loss) before income taxes and total assets of the Company for each reportable segment are summarized below (dollars in thousands).

	Three months ended September 30,				Nine months ended September 30,
Revenues:	2018		2017		2018		2017
U.S. and Latin America:
Traditional	$	1,547,790	$	1,521,383	$	4,601,631	$	4,532,584
Financial Solutions	290,848		264,170		734,148		834,992
Total	1,838,638		1,785,553		5,335,779		5,367,576
Canada:
Traditional	295,962		281,095		910,480		814,643
Financial Solutions	12,168		12,430		37,034		36,240
Total	308,130		293,525		947,514		850,883
Europe, Middle East and Africa:
Traditional	357,059		360,972		1,123,379		1,024,978
Financial Solutions	91,664		77,041		280,482		230,435
Total	448,723		438,013		1,403,861		1,255,413
Asia Pacific:
Traditional	578,035		561,660		1,763,094		1,628,419
Financial Solutions	16,167		16,932		54,005		55,368
Total	594,202		578,592		1,817,099		1,683,787
Corporate and Other	37,838		49,627		92,893		125,667
Total	$	3,227,531	$	3,145,310	$	9,597,146	$	9,283,326

	Three months ended September 30,						Nine months ended September 30,
Income (loss) before income taxes:	2018			2017			2018			2017
U.S. and Latin America:
Traditional	$	116,328		$	160,512		$	191,198		$	281,066
Financial Solutions	87,073			89,118			236,882			299,689
Total	203,401			249,630			428,080			580,755
Canada:
Traditional	21,149			28,789			66,661			80,953
Financial Solutions	1,646			4,472			8,381			12,489
Total	22,795			33,261			75,042			93,442
Europe, Middle East and Africa:
Traditional	18,370			15,421			40,259			40,751
Financial Solutions	56,205			30,953			160,738			91,776
Total	74,575			46,374			200,997			132,527
Asia Pacific:
Traditional	62,007			26,564			143,756			121,574
Financial Solutions	206			(229		)	8,365			11,020
Total	62,213			26,335			152,121			132,594
Corporate and Other	(40,323		)	(15,438		)	(148,366		)	(51,997		)
Total	$	322,661		$	340,162		$	707,874		$	887,321

Assets:	September 30, 2018		December 31, 2017
U.S. and Latin America:
Traditional	$	19,148,790	$	18,603,423
Financial Solutions	19,251,832		15,959,206
Total	38,400,622		34,562,629
Canada:
Traditional	4,210,051		4,161,452
Financial Solutions	146,374		126,372
Total	4,356,425		4,287,824
Europe, Middle East and Africa:
Traditional	3,573,449		3,099,495
Financial Solutions	4,585,297		5,274,993
Total	8,158,746		8,374,488
Asia Pacific:
Traditional	5,312,822		4,915,442
Financial Solutions	1,181,954		1,198,585
Total	6,494,776		6,114,027
Corporate and Other	5,562,073		7,175,850
Total	$	62,972,642	$	60,514,818

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Commitments, Contingencies and Guarantees

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingent Liabilities

Commitments, Contingencies and Guarantees

Commitments

Funding of Investments

The Company’s commitments to fund investments as of September 30, 2018 and December 31, 2017 are presented in the following table (dollars in thousands):

	September 30, 2018		December 31, 2017
Limited partnership interests and joint ventures	$	578,944	$	485,197
Commercial mortgage loans	120,571		40,815
Bank loans and private placements	101,992		60,472
Equity release mortgages	213,459		153,937

The Company anticipates that the majority of its current commitments will be invested over the next five years; however, these commitments could become due any time at the request of the counterparties. Bank loans and private placements are included in fixed maturity securities available-for-sale.

Contingencies

Litigation

The Company is subject to litigation in the normal course of its business. The Company currently has no material litigation. A legal reserve is established when the Company is notified of an arbitration demand or litigation or is notified that an arbitration demand or litigation is imminent, it is probable that the Company will incur a loss as a result and the amount of the probable loss is reasonably capable of being estimated.

Other Contingencies

The Company indemnifies its directors and officers as provided in its charters and by-laws. Since this indemnity generally is not subject to limitation with respect to duration or amount, the Company does not believe that it is possible to determine the maximum potential amount due under this indemnity in the future.

Guarantees

Statutory Reserve Support

RGA, through wholly-owned subsidiaries, has committed to provide statutory reserve support to third parties, in exchange for a fee, by funding loans if certain defined events occur. Such statutory reserves are required under the U.S. Valuation of Life Policies Model Regulation (commonly referred to as Regulation XXX for term life insurance policies and Regulation A-XXX for universal life secondary guarantees). The third parties have recourse to RGA should the subsidiary fail to provide the required funding, however, as of September 30, 2018, the Company does not believe that it will be required to provide any funding under these commitments as the occurrence of the defined events is considered remote. The following table presents the maximum potential obligation for these commitments as of September 30, 2018 (dollars in millions):

Commitment Period:	Maximum Potential Obligation
2023	$	500.0
2033	450.0
2034	2,000.0
2035	1,314.2
2036	1,932.0
2037	6,750.0
2038	800.0

Other Guarantees

RGA has issued guarantees to third parties on behalf of its subsidiaries for the payment of amounts due under certain securities borrowing and repurchase arrangements, financing arrangements and office lease obligations, whereby, if a subsidiary fails to meet an obligation, RGA or one of its other subsidiaries will make a payment to fulfill the obligation. Additionally, in limited circumstances, treaty guarantees are granted to ceding companies in order to provide them additional security, particularly in cases where RGA’s subsidiary is relatively new, unrated, or not of a significant size, relative to the ceding company. Liabilities supported by the treaty guarantees, before consideration for any legally offsetting amounts due from the guaranteed party are reflected on the Company’s condensed consolidated balance sheets in future policy benefits. Potential guaranteed amounts of future payments will vary depending on production levels and underwriting results. Guarantees related to securities borrowing and repurchase arrangements provide additional security to third parties should a subsidiary fail to provide securities when due. RGA’s guarantees issued as of September 30, 2018 and December 31, 2017 are reflected in the following table (dollars in thousands):

	September 30, 2018		December 31, 2017
Treaty guarantees	$	1,073,184	$	1,047,449
Treaty guarantees, net of assets in trust	966,099		926,393
Securities borrowing and repurchase arrangements	276,190		294,325
Financing arrangements	69,221		86,183
Lease obligations	881		1,662

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Income Tax

9 Months Ended

Sep. 30, 2018

Income Tax Disclosure [Abstract]

Income Tax Disclosure [Text Block]

Income Tax

The Company's effective tax rates differed from the applicable U.S. federal income tax statutory rates of 21% and 35% as a result of the following for the three and nine months ended September 30, 2018 and 2017, respectively (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Tax provision at U.S. statutory rate	$	67,759		$	119,057		$	148,654		$	310,562
Increase (decrease) in income taxes resulting from:
U.S. Tax Reform provisional adjustments	664			—			(2,685		)	—
U.S. Tax Reform valuation allowance adjustments	(58,949		)	—			(59,139		)	—
Foreign tax rate differing from U.S. tax rate	7,537			(3,635		)	8,795			(14,049		)
Differences in tax bases in foreign jurisdictions	(2,371		)	2,126			(9,264		)	(14,633		)
Deferred tax valuation allowance	(5,334		)	(2,501		)	5,357			11,627
Amounts related to tax audit contingencies	1,851			299			650			(873		)
Corporate rate changes	(166		)	(1,139		)	30			(2,332		)
Subpart F	(99		)	64			211			1,390
Foreign tax credits	(544		)	1,230			(1,003		)	(834		)
Global intangible low-taxed income, net of credit	7,624			—			11,916			—
Equity compensation excess benefit	(817		)	(2,762		)	(5,067		)	(7,226		)
Return to provision adjustments	4,213			452			4,108			133
Other, net	94			(620		)	(492		)	(1,737		)
Total provision for income taxes	$	21,462		$	112,571		$	102,071		$	282,028
Effective tax rate	6.7		%	33.1		%	14.4		%	31.8		%

On December 22, 2017, the Tax Cuts and Jobs Act of 2017 (“U.S. Tax Reform”) was signed into law. U.S. Tax Reform makes broad and complex changes to the U.S. tax code, including but not limited to, (1) reducing the U.S. federal corporate tax rate from 35% to 21%; (2) requiring companies to pay a one-time transition tax on certain unrepatriated earnings of foreign subsidiaries; (3) generally eliminating U.S. federal income taxes on dividends from foreign subsidiaries; (4) eliminating the corporate alternative minimum tax (“AMT”) and changing how existing AMT credits can be realized; (5) creating the base erosion anti-abuse tax (“BEAT”); (6) establishing a new provision designed to tax global intangible low-taxed income (“GILTI”), which allows for the possibility of using foreign tax credits and a deduction of up to 50 percent to offset the income tax liability (subject to some limitations); and (7) changing rules related to uses and limitations of net operating loss carryforwards created in tax years beginning after December 31, 2017.

The SEC issued Staff Accounting Bulletin 118 (“SAB 118”), which provides guidance on accounting for the tax effects of U.S. Tax Reform. SAB 118 provides a measurement period that should not extend beyond one year from U.S. Tax Reform enactment date for companies to complete the accounting under Accounting Standards Codification 740 (“ASC 740”). In accordance with SAB 118, a company must reflect the income tax effects of those aspects of U.S. Tax Reform for which the accounting under ASC 740 is complete. To the extent that a company’s accounting for certain income tax effects of U.S. Tax Reform is incomplete but it is able to determine a reasonable estimate, it must record a provisional estimate in the financial statements. If a company cannot determine a provisional estimate to be included in the financial statements, it should continue to apply ASC 740 on the basis of the provisions of the tax laws that were in effect immediately before the enactment of U.S. Tax Reform.

The Company calculated a provisional estimate of the impact of U.S. Tax Reform for its 2017 financial statements. As of September 30, 2018, the Company has finalized certain aspects of U.S. Tax Reform including computing the pretax deferred tax items upon which the change in tax rate was applied, the one-time transition tax on unrepatriated earnings of foreign subsidiaries and the adoption of Accounting Standards Update 2018-02 (“ASU 2018-02”). The Company has refined provisional estimates related to excessive employee remuneration, which may be further refined during the fourth quarter. The Company also continues to monitor the issuance of new guidance in the form of Treasury Regulations or Notices which could impact the provisional balances recorded as of December 31, 2017. In addition to the amounts in the table above, the Company recorded an additional adjustment in the third quarter of 2018 related to ASU 2018-02, decreasing accumulated other comprehensive income and increasing retained earnings by approximately $2.6 million.

The Company provisionally estimated there would be no one-time transition tax on unrepatriated earnings of foreign subsidiaries. Upon review of the Proposed Treasury Regulations issued during the quarter and completion of the accumulated and current earnings and profits calculations of the Company’s foreign subsidiaries, no adjustment to the provisional estimate of the transition tax on unrepatriated earnings is necessary.

Companies subject to GILTI have the option to account for the GILTI tax as a period cost if and when incurred, or to recognize deferred taxes for temporary differences including outside basis differences expected to reverse as GILTI. The Company has not yet made a policy election to account for GILTI but included an estimate of the current GILTI impact in the tax provision. The Company continues to gather information and monitor guidance that may change the Company’s interpretation of the law and hence may result in a refinement to the calculation and changes to this amount.

The Company continues to evaluate the effects of the BEAT and is currently restructuring existing business flows to reduce the risk that the Company will be subject to the BEAT for 2018. The Company has estimated that the annual deductible payments to foreign affiliates as a percentage of annual estimated total deductions to be below the base erosion percentage threshold for application of the BEAT; therefore, the Company has not established an additional BEAT liability as of September 30, 2018. The Company continues to gather information and monitor guidance that may change the Company’s interpretation of the law and hence may result in a refinement to the calculation and changes to this amount.

The effective tax rate for the third quarter and first nine months of 2018 were lower than the U.S. Statutory rate of 21.0% primarily as a result of the release of a valuation allowance on foreign tax credits, which was partially offset by income earned in jurisdictions with statutory rates higher than the U.S. tax rate and tax expense related to GILTI. During the third quarter the Company released an uncertain tax position due to the expiration of the statute of limitations and established a new position. The foreign tax credits were used to offset the new uncertain tax liability, resulting in a valuation allowance no longer being necessary. $58.9 million of the release of the valuation allowance was previously established as part of U.S. Tax Reform. The effective tax rates for the third quarter and first nine months of 2017 were lower than the U.S. Statutory rate of 35% primarily as a result of income generated in non-U.S. jurisdictions with lower tax rates than the U.S. The first nine months of 2017 also included a reduction related to differences in tax bases in foreign jurisdictions and a tax benefit from the filing of amended returns, which was partially offset with a valuation allowance established related to amended return filings.

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Employee Benefit Plans

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Employee Benefit Plans

Employee Benefit Plans

The components of net periodic benefit costs, included in other operating expenses on the condensed consolidated statements of income, for the three and nine months ended September 30, 2018 and 2017 were as follows (dollars in thousands):

	Pension Benefits						Other Benefits
	Three months ended September 30,						Three months ended September 30,
	2018			2017			2018			2017
Service cost	$	3,106		$	2,699		$	999		$	465
Interest cost	1,341			1,314			680			459
Expected return on plan assets	(1,884		)	(1,554		)	—			—
Amortization of prior service cost (credit)	82			85			(328		)	(675		)
Amortization of prior actuarial losses	929			1,081			937			580
Settlements	—			256			—			—
Net periodic benefit cost	$	3,574		$	3,881		$	2,288		$	829

	Pension Benefits						Other Benefits
	Nine months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Service cost	$	9,330		$	8,098		$	2,271		$	1,907
Interest cost	4,028			3,943			1,739			1,589
Expected return on plan assets	(5,651		)	(4,662		)	—			—
Amortization of prior service cost (credit)	247			254			(986		)	(986		)
Amortization of prior actuarial losses	2,792			3,244			1,933			1,494
Settlements	—			769			—			—
Net periodic benefit cost	$	10,746		$	11,646		$	4,957		$	4,004

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Reinsurance

9 Months Ended

Sep. 30, 2018

Retrocession Arrangements And Reinsurance Ceded Receivables [Abstract]

Retrocession Arrangements and Reinsurance Ceded Receivables

Reinsurance

Retrocession reinsurance treaties do not relieve the Company from its obligations to direct writing companies. Failure of retrocessionaires to honor their obligations could result in losses to the Company. Consequently, allowances would be established for amounts deemed uncollectible. At September 30, 2018 and December 31, 2017, no allowances were deemed necessary. The Company regularly evaluates the financial condition of the insurance companies from which it assumes and to which it cedes reinsurance.

Retrocessions are arranged through the Company’s retrocession pools for amounts in excess of the Company’s retention limit. As of September 30, 2018 and December 31, 2017, all rated retrocession pool participants followed by the A.M. Best Company were rated “A- (excellent)” or better, except for one pool member that was rated “B++”. The Company verifies retrocession pool participants’ ratings on a quarterly basis. For a majority of the retrocessionaires that were not rated, security in the form of letters of credit or trust assets has been posted. In addition, the Company performs annual financial reviews of its retrocessionaires to evaluate financial stability and performance. In addition to its third party retrocessionaires, various RGA reinsurance subsidiaries retrocede amounts in excess of their retention limits to affiliated subsidiaries.

The following table presents information for the Company’s reinsurance ceded receivable assets, including the respective amount and A.M. Best rating for each reinsurer representing in excess of five percent of the total as of September 30, 2018 or December 31, 2017 (dollars in thousands):

		September 30, 2018				December 31, 2017
Reinsurer	A.M. Best Rating	Amount		% of Total		Amount		% of Total
Reinsurer A	A+	$	303,942	39.5		$	301,478	38.6	%
Reinsurer B	A+	203,702		26.5		203,898		26.1
Reinsurer C	A	67,599		8.8		67,723		8.7
Reinsurer D	A+	41,049		5.3		40,528		5.2
Reinsurer E	A++	35,090		4.6		40,592		5.2
Other reinsurers		117,942		15.3		127,808		16.2
Total		$	769,324	100.0	%	$	782,027	100.0	%

Included in the total reinsurance ceded receivables balance were $269.1 million and $243.8 million of claims recoverable, of which $6.7 million and $1.9 million were in excess of 90 days past due, as of September 30, 2018 and December 31, 2017, respectively.

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Financing Activities

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Debt Disclosure [Text Block]

Financing Activities

On August 21, 2018 the Company entered into a new syndicated revolving credit facility with a five year term and an overall capacity of $850.0 million, replacing its existing $850.0 million syndicated revolving credit facility, which was scheduled to mature in September 2019.

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New Accounting Standards

9 Months Ended

Sep. 30, 2018

Accounting Changes and Error Corrections [Abstract]

New Accounting Standards

New Accounting Standards

Changes to the general accounting principles are established by the Financial Accounting Standards Board (“FASB”) in the form of accounting standards updates to the FASB Accounting Standards Codification™. Accounting standards updates not listed below were assessed and determined to be either not applicable or are expected to have minimal impact on the Company’s condensed consolidated financial statements.

Description	Date of Adoption	Effect on the financial statements or other significant matters
Standards adopted:
Reporting Comprehensive Income This updated guidance requires reclassification from accumulated other comprehensive income to retained earnings for the stranded tax effects resulting from the newly enacted U.S. federal corporate income tax rate. The amount of the reclassification would be the difference between the historical U.S. federal corporate income tax rate and the newly enacted 21 percent tax rate.	December 31, 2017	The Company adopted the new guidance by reclassifying certain income tax effects of items within accumulated other comprehensive income to retained earnings as a result of the Tax Cuts and Jobs Act of 2017. The impact of adopting this standard was an increase in accumulated other comprehensive income and a reduction in retained earnings of approximately $156.4 million. The adjustments to the Company’s deferred tax liabilities was a provisional amount as defined in the SEC’s SAB 118, issued in December 2017 to address complexities in completing the calculations resulting from the U.S. Tax Cuts and Jobs Act of 2017.  SAB 118 provides guidance on accounting for the effects of the U.S. Tax and Jobs Act of 2017 when the Company’s process is incomplete, and permits a final determination to be made within a measurement period not to exceed one year from the enactment date.   During 2018, the Company continued to evaluate and gather additional information to account for the effects of the Tax Cuts and Jobs Act of 2017, including the preparation of and filing of its U.S. tax returns to more precisely compute the pretax deferred tax items and the impact of adopting the new guidance. As part of this process the Company recorded an additional adjustment in 2018 decreasing accumulated other comprehensive income and increasing retained earnings of approximately $2.6 million.
Stock Compensation This updated guidance requires excess tax benefits and deficiencies from share-based payment awards be recorded in income tax expense in the income statement. Previously, excess tax benefits and deficiencies were recognized in shareholders’ equity or deferred taxes on the balance sheet depending on the tax situation of the Company. In addition, the updated guidance also changes the accounting for forfeitures and statutory tax withholding requirements, as well as the classification in the statement of cash flows.	January 1, 2017	Upon adoption, the Company recognized excess tax benefits of approximately $17.7 million in deferred tax assets that were previously not recognized in a cumulative-effect adjustment increasing retained earnings by $17.7 million. The Company also recorded excess tax benefits of approximately $10.5 million in the provision for income taxes for the year ended December 31, 2017. The number of weighted average diluted shares outstanding were also adjusted to exclude excess tax benefits from the assumed proceeds in the diluted shares calculation resulting in an immaterial increase in the number of dilutive shares outstanding. The Company also elected to continue estimating forfeitures for purposes of recognizing share-based compensation. Other aspects of the adoption of the updated guidance did not have a material impact to the Company’s consolidated financial statements.
Financial Instruments - Recognition and Measurement This guidance requires equity investments that are not accounted for under the equity method of accounting to be measured at fair value with changes recognized in net income and also updates certain presentation and disclosure requirements.	January 1, 2018	This guidance required a cumulative-effect adjustment for certain items upon adoption. The adoption of the new guidance was not material to the Company's consolidated financial statements.

Standards not yet adopted:
Leases This new standard, based on the principle that entities should recognize assets and liabilities arising from leases, does not significantly change the lessees’ recognition, measurement and presentation of expenses and cash flows from the previous accounting standard. Leases are classified as finance or operating. The new standard’s primary change is the requirement for entities to recognize a lease liability for payments and a right of use asset representing the right to use the leased asset during the term of operating lease arrangements. Lessees are permitted to make an accounting policy election to not recognize the asset and liability for leases with a term of twelve months or less. Lessors’ accounting is largely unchanged from the previous accounting standard. In addition, the new standard expands the disclosure requirements of lease arrangements. Early adoption is permitted.	January 1, 2019	This new standard will be adopted by applying a modified retrospective transition approach, which includes a number of practical expedients. The Company is currently evaluating the impact of this amendment on its consolidated financial statements; however, it does not expect the adoption of the new standard to have a material impact on its results of operations or balance sheet as a result of the recognition of right-to-use assets and lease liabilities related to operating leases. Contractual obligations related to operating leases totaled approximately $38.2 million as of December 31, 2017.
Derivatives and Hedging This updated guidance improves the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements and make certain targeted improvements to simplify the application of the hedge accounting in current GAAP related to the assessment of hedge effectiveness. Early adoption is permitted.	January 1, 2019	This new guidance will be adopted by applying a modified retrospective approach to existing hedging relationships as of the date of adoption. The Company is currently evaluating the impact of this updated guidance on its consolidated financial statements.
Financial Instruments - Credit Losses This guidance adds to U.S. GAAP an impairment model, known as current expected credit loss (“CECL”) model that is based on expected losses rather than incurred losses. For traditional and other receivables, held-to-maturity debt securities, loans and other instruments entities will be required to use the new forward-looking “expected loss” model that generally will result in earlier recognition of allowance for losses. For available-for-sale debt securities with unrealized losses, entities will measure credit losses similar to what they do today, except the losses will be recognized as allowances rather than reduction to the amortized cost of the securities. Early adoption is permitted.	January 1, 2020	This guidance will be adopted through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective (that is, a modified-retrospective approach). The Company is currently evaluating the impact of this amendment on its consolidated financial statements.
Fair Value Measurement This guidance is part of the FASB’s disclosure framework project and eliminates certain disclosure requirements for fair value measurement, requires entities to disclose new information and modifies existing disclosure requirements. Early adoption is permitted.	January 1, 2020	Certain disclosure changes in the new guidance will be applied prospectively in the year of adoption. The remaining changes in the new guidance will be applied retrospectively to all periods presented in the year of adoption. The Company is currently evaluating the impact of this amendment on its consolidated financial statements.
Financial Services - Insurance This guidance significantly changes how insurers account for long-duration insurance contracts. The new guidance will require insurers to review and update, if necessary, the assumptions used to measure insurance liabilities periodically, rather than retain assumptions used at contract inception. The updated guidance also changes the recognition and measurement of deferred acquisition costs (DAC) and created a new category of benefit features called market risk benefits (MRB) that will be measured at fair value. The guidance also significantly expands the disclosure requirements for long-duration contracts.	January 1, 2021	The guidance on measuring the liabilities for future policy benefits and DAC will be adopted on a modified retrospective basis as of the earliest period presented in the year of adoption. The guidance on MRB will be adopted on a retrospective basis as of the earliest period presented in the year of adoption. The Company is currently evaluating the impact of this amendment on its consolidated financial statements but anticipates the updated guidance will likely have a material impact on the measurement and recognition of its long-duration insurance contracts.
Compensation - Retirement Benefits - Defined Benefit Plans - General This guidance is part of the FASB’s disclosure framework project and eliminates certain disclosure requirements for defined benefit pension and other postretirement plans. Early adoption is permitted.	January 1, 2021	This new guidance will be applied retrospectively to all periods presented in the year of adoption. The Company is currently evaluating the impact of this amendment on its consolidated financial statements.

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Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table sets forth the computation of basic and diluted earnings per share on net income (in thousands, except per share information):

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Earnings:
Net income (numerator for basic and diluted calculations)	$	301,199	$	227,591	$	605,803	$	605,293
Shares:
Weighted average outstanding shares (denominator for basic calculation)	63,279		64,488		63,941		64,430
Equivalent shares from outstanding stock options	1,017		1,165		1,189		1,174
Denominator for diluted calculation	64,296		65,653		65,130		65,604
Earnings per share:
Basic	$	4.76	$	3.53	$	9.47	$	9.39
Diluted	$	4.68	$	3.47	$	9.30	$	9.23

Schedule Of Earnings Per Share Basic And Diluted By Common Class [Text Block]

The following table presents approximate amounts of stock options and performance contingent shares excluded from the calculation of common equivalent shares (in thousands):

	Three months ended September 30,		Nine months ended September 30,
	2018	2017	2018	2017
Excluded from common equivalent shares:
Stock options	227	87	349	296
Performance contingent shares	276	307	256	293

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Equity (Tables)

9 Months Ended

Sep. 30, 2018

Stockholders' Equity Note [Abstract]

Schedule of Stock by Class [Table Text Block]

The changes in number of common stock shares, issued, held in treasury and outstanding are as follows for the periods indicated:

	Issued	Held In Treasury		Outstanding
Balance, December 31, 2017	79,137,758	14,685,663		64,452,095
Common stock acquired	—	1,750,295		(1,750,295	)
Stock-based compensation (1)	—	(249,068	)	249,068
Balance, September 30, 2018	79,137,758	16,186,890		62,950,868

	Issued	Held In Treasury		Outstanding
Balance, December 31, 2016	79,137,758	14,835,256		64,302,502
Common stock acquired	—	208,680		(208,680	)
Stock-based compensation (1)	—	(274,449	)	274,449
Balance, September 30, 2017	79,137,758	14,769,487		64,368,271

(1) Represents net shares issued from treasury pursuant to the Company’s equity-based compensation programs.

Components of Accumulated Other Comprehensive Income

The balance of and changes in each component of accumulated other comprehensive income (loss) (“AOCI”) for the nine months ended September 30, 2018 and 2017 are as follows (dollars in thousands):

	Accumulated Currency Translation Adjustments			Unrealized Appreciation (Depreciation) of Investments(1)			Pension and Postretirement Benefits			Total
Balance, December 31, 2017	$	(86,350	)	$	2,200,661		$	(50,680	)	$	2,063,631
Other comprehensive income (loss) before reclassifications	(24,977		)	(1,638,146		)	(3,391		)	(1,666,514		)
Amounts reclassified to (from) AOCI	—			79,505			3,986			83,491
Deferred income tax benefit (expense)	(5,398		)	340,332			(164		)	334,770
Adoption of new accounting standard	(2,573		)	—			—			(2,573		)
Balance, September 30, 2018	$	(119,298	)	$	982,352		$	(50,249	)	$	812,805

	Accumulated Currency Translation Adjustments			Unrealized Appreciation (Depreciation) of Investments(1)			Pension and Postretirement Benefits			Total
Balance, December 31, 2016	$	(172,541	)	$	1,355,033		$	(43,163	)	$	1,139,329
Other comprehensive income (loss) before reclassifications	23,117			671,564			(191		)	694,490
Amounts reclassified to (from) AOCI	—			(51,407		)	4,006			(47,401		)
Deferred income tax benefit (expense)	44,968			(204,287		)	(1,342		)	(160,661		)
Balance, September 30, 2017	$	(104,456	)	$	1,770,903		$	(40,690	)	$	1,625,757

(1) Includes cash flow hedges of $29,043 and $2,619 as of September 30, 2018 and December 31, 2017, respectively, and $347 and $(2,496) as of September 30, 2017 and December 31, 2016, respectively. See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.

Reclassification Out Of Accumulated Other Comprehensive Income

The following table presents the amounts of AOCI reclassifications for the three and nine months ended September 30, 2018 and 2017 (dollars in thousands):

	Amount Reclassified from AOCI
	Three months ended September 30,						Nine months ended September 30,
Details about AOCI Components	2018			2017			2018			2017			Affected Line Item in  Statements of Income
Net unrealized investment gains (losses):
Net unrealized gains (losses) on available-for-sale securities	$	(21,249	)	$	10,515		$	(60,347	)	$	39,032		Investment related gains (losses), net
Cash flow hedges - Interest rate	234			—			(108		)	—			(1)
Cash flow hedges - Currency/Interest rate	50			230			270			560			(1)
Cash flow hedges - Forward bond purchase commitments	—			224			—			286			(1)
Deferred policy acquisition costs attributed to unrealized gains and losses	(4,893		)	1,116			(19,320		)	11,529			(2)
Total	(25,858		)	12,085			(79,505		)	51,407
Provision for income taxes	5,355			(3,991		)	16,978			(16,015		)
Net unrealized gains (losses), net of tax	$	(20,503	)	$	8,094		$	(62,527	)	$	35,392
Amortization of defined benefit plan items:
Prior service cost (credit)	$	246		$	590		$	739		$	732		(3)
Actuarial gains/(losses)	(1,866		)	(1,661		)	(4,725		)	(4,738		)	(3)
Total	(1,620		)	(1,071		)	(3,986		)	(4,006		)
Provision for income taxes	340			375			837			1,402
Amortization of defined benefit plans, net of tax	$	(1,280	)	$	(696	)	$	(3,149	)	$	(2,604	)
Total reclassifications for the period	$	(21,783	)	$	7,398		$	(65,676	)	$	32,788

(1) See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.

(2) This AOCI component is included in the computation of the deferred policy acquisition cost. See Note 8 – “Deferred Policy Acquisition Costs” of the 2017 Annual Report for additional details.

(3) This AOCI component is included in the computation of the net periodic pension cost. See Note 10 – “Employee Benefit Plans” for additional detai

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Investments (Tables)

9 Months Ended

Sep. 30, 2018

Investments [Abstract]

Available For Sale Securities

The following table provides information relating to investments in fixed maturity securities by sector as of September 30, 2018 (dollars in thousands):

September 30, 2018:	Amortized Cost		Unrealized Gains		Unrealized Losses		Estimated Fair Value		% of Total		Other-than- temporary impairments in AOCI
Available-for-sale:
Corporate	$	24,271,467	$	594,444	$	416,413	$	24,449,498	62.7	%	$	—
Canadian government	2,902,433		1,138,426		4,109		4,036,750		10.3		—
RMBS	1,816,949		14,235		50,422		1,780,762		4.6		—
ABS	1,867,650		10,312		14,945		1,863,017		4.8		275
CMBS	1,282,015		8,403		16,884		1,273,534		3.3		—
U.S. government	1,500,703		6,359		94,653		1,412,409		3.6		—
State and political subdivisions	889,218		36,410		13,637		911,991		2.3		—
Other foreign government	3,220,697		98,574		42,020		3,277,251		8.4		—
Total fixed maturity securities	$	37,751,132	$	1,907,163	$	653,083	$	39,005,212	100.0	%	$	275

 The following table provides information relating to investments in fixed maturity and equity securities by sector as of December 31, 2017 (dollars in thousands):

December 31, 2017:	Amortized Cost		Unrealized Gains		Unrealized Losses		Estimated Fair Value		% of Total		Other-than- temporary impairments in AOCI
Available-for-sale:
Corporate	$	21,966,803	$	1,299,594	$	55,429	$	23,210,968	60.9	%	$	—
Canadian government	2,843,273		1,378,510		1,707		4,220,076		11.1		—
RMBS	1,695,126		36,632		11,878		1,719,880		4.5		—
ABS	1,634,758		18,798		5,194		1,648,362		4.3		275
CMBS	1,285,594		22,627		4,834		1,303,387		3.4		—
U.S. government	1,953,436		12,089		21,933		1,943,592		5.1		—
State and political subdivisions	647,727		59,997		4,296		703,428		1.8		—
Other foreign government	3,254,695		154,507		8,075		3,401,127		8.9		—
Total fixed maturity securities	$	35,281,412	$	2,982,754	$	113,346	$	38,150,820	100.0	%	$	275
Non-redeemable preferred stock	$	41,553	$	479	$	2,226	$	39,806	39.7	%
Other equity securities	61,288		479		1,421		60,346		60.3
Total equity securities	$	102,841	$	958	$	3,647	$	100,152	100.0	%

Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]

The following table includes fixed maturity securities pledged and received as collateral and assets in trust held to satisfy collateral requirements under derivative transactions and certain third-party reinsurance treaties as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018				December 31, 2017
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Fixed maturity securities pledged as collateral	$	67,899	$	69,792	$	72,542	$	75,622
Fixed maturity securities received as collateral	n/a		592,146		n/a		590,417
Assets in trust held to satisfy collateral requirements	19,263,724		19,670,559		15,584,296		16,715,281

Concentration Risk Disclosure [Text Block]

The Company’s exposure to concentrations of credit risk from single issuers greater than 10% of the Company’s stockholders’ equity included securities of the U.S. government and its agencies as well as the securities disclosed below as of September 30, 2018 and December 31, 2017 (dollars in thousands).

	September 30, 2018				December 31, 2017
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Fixed maturity securities guaranteed or issued by:
Canadian province of Quebec	$	1,158,326	$	1,833,972	$	1,119,337	$	1,917,996
Canadian province of Ontario	951,186		1,225,712		939,837		1,282,944

Investments Classified By Contractual Maturity Date

The amortized cost and estimated fair value of fixed maturity securities classified as available-for-sale at September 30, 2018 are shown by contractual maturity in the table below (dollars in thousands). Actual maturities can differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Asset and mortgage-backed securities are shown separately in the table below, as they are not due at a single maturity date.

	Amortized Cost		Estimated Fair Value
Available-for-sale:
Due in one year or less	$	986,289	$	993,352
Due after one year through five years	7,797,732		7,888,116
Due after five years through ten years	9,311,737		9,407,186
Due after ten years	14,688,760		15,799,245
Asset and mortgage-backed securities	4,966,614		4,917,313
Total	$	37,751,132	$	39,005,212

Fixed Maturity Holdings Industry Types Weighted Average Credit Ratings [Table Text Block]

The tables below show the major industry types of the Company’s corporate fixed maturity holdings as of September 30, 2018 and December 31, 2017 (dollars in thousands):

September 30, 2018:			Estimated
	Amortized Cost		Fair Value		% of Total
Finance	$	8,561,885	$	8,564,254	35.1	%
Industrial	12,632,502		12,753,024		52.1
Utility	3,077,080		3,132,220		12.8
Total	$	24,271,467	$	24,449,498	100.0	%
December 31, 2017:			Estimated
	Amortized Cost		Fair Value		% of Total
Finance	$	7,977,885	$	8,362,774	36.1	%
Industrial	11,535,166		12,199,333		52.5
Utility	2,453,752		2,648,861		11.4
Total	$	21,966,803	$	23,210,968	100.0	%

Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block]

The following table sets forth the amount of pre-tax credit loss impairments on fixed maturity securities held by the Company as of the dates indicated, for which a portion of the OTTI loss was recognized in AOCI, and the corresponding changes in such amounts (dollars in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Balance, beginning of period	$	3,677	$	3,677	$	3,677	$	6,013
Credit loss OTTI previously recognized on securities impaired to fair value during the period	—		—		—		(2,336		)
Balance, end of period	$	3,677	$	3,677	$	3,677	$	3,677

Investments In Debt And Equity Securities Gross Unrealized Losses Disclosures

The following table presents the total gross unrealized losses for the 2,866 fixed maturity securities as of September 30, 2018, where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in thousands):

	September 30, 2018
	Gross Unrealized Losses		% of Total
Less than 20%	$	640,481	98.1	%
20% or more for less than six months	309		—
20% or more for six months or greater	12,293		1.9
Total	$	653,083	100.0	%

The following table presents the total gross unrealized losses for the 1,116 fixed maturity and equity securities at December 31, 2017 where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in thousands):

	December 31, 2017
	Gross Unrealized Losses		% of Total
Less than 20%	$	113,466	97.0	%
20% or more for less than six months	689		0.6
20% or more for six months or greater	2,838		2.4
Total	$	116,993	100.0	%

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]

The following table presents the estimated fair values and gross unrealized losses, including other-than-temporary impairment losses reported in AOCI, for 2,866 fixed maturity securities that have estimated fair values below amortized cost as of September 30, 2018 (dollars in thousands). These investments are presented by class and grade of security, as well as the length of time the related fair value has remained below amortized cost.

	Less than 12 months				12 months or greater				Total
			Gross				Gross				Gross
September 30, 2018:	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
Investment grade securities:
Corporate	$	10,117,970	$	303,926	$	1,290,804	$	81,236	$	11,408,774	$	385,162
Canadian government	58,816		1,211		107,167		2,736		165,983		3,947
RMBS	931,044		23,339		528,739		27,063		1,459,783		50,402
ABS	680,900		8,650		262,544		6,243		943,444		14,893
CMBS	555,716		8,304		207,943		8,580		763,659		16,884
U.S. government	197,114		3,913		1,002,661		90,740		1,199,775		94,653
State and political subdivisions	261,456		6,722		90,649		6,915		352,105		13,637
Other foreign government	1,034,417		24,666		297,566		11,062		1,331,983		35,728
Total investment grade securities	13,837,433		380,731		3,788,073		234,575		17,625,506		615,306
Below investment grade securities:
Corporate	539,521		23,955		77,675		7,296		617,196		31,251
Canadian government	2,328		162		—		—		2,328		162
RMBS	—		—		1,102		20		1,102		20
ABS	—		—		1,110		52		1,110		52
Other foreign government	140,692		5,931		6,410		361		147,102		6,292
Total below investment grade securities	682,541		30,048		86,297		7,729		768,838		37,777
Total fixed maturity securities	$	14,519,974	$	410,779	$	3,874,370	$	242,304	$	18,394,344	$	653,083

The following table presents the estimated fair values and gross unrealized losses, including other-than-temporary impairment losses reported in AOCI, for 1,116 fixed maturity and equity securities that have estimated fair values below amortized cost as of December 31, 2017 (dollars in thousands):

	Less than 12 months				12 months or greater				Total
			Gross				Gross				Gross
December 31, 2017:	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
Investment grade securities:
Corporate	$	1,886,212	$	17,099	$	1,009,750	$	28,080	$	2,895,962	$	45,179
Canadian government	18,688		91		111,560		1,596		130,248		1,687
RMBS	566,699		5,852		224,439		6,004		791,138		11,856
ABS	434,274		2,707		168,524		2,434		602,798		5,141
CMBS	220,401		1,914		103,269		2,920		323,670		4,834
U.S. government	800,298		6,177		767,197		15,756		1,567,495		21,933
State and political subdivisions	43,510		242		68,666		4,054		112,176		4,296
Other foreign government	369,717		2,707		191,265		4,704		560,982		7,411
Total investment grade securities	4,339,799		36,789		2,644,670		65,548		6,984,469		102,337
Below investment grade securities:
Corporate	194,879		3,317		75,731		6,933		270,610		10,250
Canadian government	1,995		20		—		—		1,995		20
RMBS	—		—		1,369		22		1,369		22
ABS	—		—		1,489		53		1,489		53
Other foreign government	28,600		113		15,134		551		43,734		664
Total below investment grade securities	225,474		3,450		93,723		7,559		319,197		11,009
Total fixed maturity securities	$	4,565,273	$	40,239	$	2,738,393	$	73,107	$	7,303,666	$	113,346
Non-redeemable preferred stock	$	82	$	1	$	26,471	$	2,225	$	26,553	$	2,226
Other equity securities	5,820		1,023		47,251		398		53,071		1,421
Total equity securities	$	5,902	$	1,024	$	73,722	$	2,623	$	79,624	$	3,647

Investment Income

Major categories of investment income, net of related expenses, consist of the following (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Fixed maturity securities available-for-sale	$	378,669		$	359,157		$	1,121,496		$	1,039,392
Equity securities	1,319			942			3,710			3,296
Mortgage loans on real estate	54,424			50,040			155,083			138,829
Policy loans	14,730			15,404			44,285			45,870
Funds withheld at interest	108,232			102,144			270,094			327,089
Short-term investments and cash and cash equivalents	3,067			1,977			9,276			5,266
Other invested assets	35,594			46,653			80,207			87,192
Investment income	596,035			576,317			1,684,151			1,646,934
Investment expense	(23,293		)	(19,399		)	(67,019		)	(57,114		)
Investment income, net of related expenses	$	572,742		$	556,918		$	1,617,132		$	1,589,820

Gain Loss On Investments

Investment related gains (losses), net consist of the following (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Fixed maturity securities available for sale:
Other-than-temporary impairment losses	$	(10,705	)	$	(390	)	$	(14,055	)	$	(20,980	)
Gain on investment activity	20,040			19,512			52,146			91,611
Loss on investment activity	(37,880		)	(7,593		)	(94,194		)	(26,577		)
Equity securities:
Other-than-temporary impairment losses	—			(889		)	—			(889		)
Gain on investment activity	3,932			10			4,429			24
Loss on investment activity	(174		)	(85		)	(1,124		)	(4,135		)
Change in unrealized gains (losses) recognized in earnings	3,539			—			(7,564		)	—
Other impairment losses and change in mortgage loan provision	(6,566		)	(2,446		)	(8,235		)	(9,220		)
Derivatives and other, net	7,797			14,534			37,538			109,637
Total investment related gains (losses), net	$	(20,017	)	$	22,653		$	(31,059	)	$	139,471

Schedule of Repurchase Agreements [Table Text Block]

The following table includes the amount of borrowed securities, securities lent and securities collateral received as part of the securities lending program and repurchased/reverse repurchased securities pledged and received as of September 30, 2018 and December 31, 2017 (dollars in thousands).

	September 30, 2018				December 31, 2017
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Borrowed securities	$	353,650	$	370,323	$	358,875	$	377,820
Securities lending:
Securities loaned	101,965		102,489		117,246		121,551
Securities received	n/a		112,000		n/a		128,000
Repurchase program/reverse repurchase program:
Securities pledged	408,679		404,905		413,819		428,344
Securities received	n/a		400,515		n/a		417,550

Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block]

The following tables present information on the Company’s securities lending and repurchase transactions as of September 30, 2018 and December 31, 2017 (dollars in thousands). Collateral associated with certain borrowed securities is not included within the table, as the collateral pledged to each counterparty is the right to reinsurance treaty cash flows.

	September 30, 2018
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Securities lending transactions:
Corporate	$	—	$	—	$	—	$	102,489	$	102,489
Total	—		—		—		102,489		102,489
Repurchase transactions:
Corporate	—		—		—		132,228		132,228
U.S. government	—		—		—		219,906		219,906
Foreign government	—		—		—		52,771		52,771
Other	—		—		—		—		—
Total	—		—		—		404,905		404,905
Total transactions	$	—	$	—	$	—	$	507,394	$	507,394
Gross amount of recognized liabilities for securities lending and repurchase transactions in preceding table									$	541,411
Amounts related to agreements not included in offsetting disclosure									$	34,017

	December 31, 2017
	Remaining Contractual Maturity of the Agreements
	Overnight and Continuous		Up to 30 Days		30-90 Days		Greater than 90 Days		Total
Securities lending transactions:
Corporate	$	—	$	—	$	—	$	121,551	$	121,551
Total	$	—	$	—	$	—	$	121,551	$	121,551
Repurchase transactions:
Corporate	$	—	$	—	$	312	$	184,334	$	184,646
U.S. government	—		—		—		220,765		220,765
Foreign government	—		—		—		21,802		21,802
Other	1,131		—		—		—		1,131
Total	1,131		—		312		426,901		428,344
Total borrowings	$	1,131	$	—	$	312	$	548,452	$	549,895
Gross amount of recognized liabilities for securities lending and repurchase transactions in preceding table									$	576,786
Amounts related to agreements not included in offsetting disclosure									$	26,891

Disclosure Of Real Estate Holdings By Property Type [Table Text Block]

The distribution of mortgage loans by property type is as follows as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018					December 31, 2017
Property type:	Carrying Value			% of Total		Carrying Value			% of Total
Office building	$	1,633,887		34.1	%	$	1,487,392		33.6	%
Retail	1,365,157			28.5		1,270,676			28.8
Industrial	983,553			20.5		938,612			21.3
Apartment	543,917			11.3		510,052			11.6
Other commercial	267,712			5.6		206,439			4.7
Recorded investment	4,794,226			100.0	%	4,413,171			100.0	%
Unamortized balance of loan origination fees and expenses	(4,786		)			(3,254		)
Valuation allowances	(10,366		)			(9,384		)
Total mortgage loans on real estate	$	4,779,074				$	4,400,533

Mortgage Loans Classified By Contractual Maturity Date [Table Text Block]

The maturities of mortgage loans as of September 30, 2018 and December 31, 2017 are as follows (dollars in thousands):

	September 30, 2018				December 31, 2017
	Recorded Investment		% of Total		Recorded Investment		% of Total
Due within five years	$	1,216,241	25.4	%	$	1,091,066	24.8	%
Due after five years through ten years	2,738,400		57.1		2,516,872		57.0
Due after ten years	839,585		17.5		805,233		18.2
Total	$	4,794,226	100.0	%	$	4,413,171	100.0	%

Financing Receivable Credit Quality Indicators [Table Text Block]

The following tables set forth certain key credit quality indicators of the Company’s recorded investment in mortgage loans as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	Recorded Investment
	Debt Service Ratios						Construction loans
	>1.20x		1.00x - 1.20x		<1.00x				Total		% of Total
September 30, 2018:
Loan-to-Value Ratio
0% - 59.99%	$	2,146,401	$	63,794	$	43,486	$	25,724	$	2,279,405	47.6	%
60% - 69.99%	1,666,525		117,726		62,617		—		1,846,868		38.5
70% - 79.99%	386,137		70,884		76,054		—		533,075		11.1
Greater than 80%	108,233		22,429		4,216		—		134,878		2.8
Total	$	4,307,296	$	274,833	$	186,373	$	25,724	$	4,794,226	100.0	%

	Recorded Investment
	Debt Service Ratios						Construction loans
	>1.20x		1.00x - 1.20x		<1.00x				Total		% of Total
December 31, 2017:
Loan-to-Value Ratio
0% - 59.99%	$	2,148,428	$	53,979	$	3,801	$	—	$	2,206,208	50.0	%
60% - 69.99%	1,517,029		47,128		43,921		—		1,608,078		36.4
70% - 79.99%	396,446		19,461		15,367		—		431,274		9.8
Greater than 80%	120,850		30,713		6,362		9,686		167,611		3.8
Total	$	4,182,753	$	151,281	$	69,451	$	9,686	$	4,413,171	100.0	%

Past Due Financing Receivables [Table Text Block]

The age analysis of the Company’s past due recorded investments in mortgage loans as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018		December 31, 2017
31-60 days past due	$	—	$	17,100
61-90 days past due	—		2,056
Total past due	—		19,156
Current	4,794,226		4,394,015
Total	$	4,794,226	$	4,413,171

Recorded Investment And Allowance For Credit Losses

The following table presents the recorded investment in mortgage loans, by method of measuring impairment, and the related valuation allowances as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018		December 31, 2017
Mortgage loans:
Individually measured for impairment	$	30,629	$	5,858
Collectively measured for impairment	4,763,597		4,407,313
Recorded investment	$	4,794,226	$	4,413,171
Valuation allowances:
Individually measured for impairment	$	—	$	—
Collectively measured for impairment	10,366		9,384
Total valuation allowances	$	10,366	$	9,384

Allowance For Mortgage Loan And Lease Losses Provision For Loss Net

Information regarding the Company’s loan valuation allowances for mortgage loans for the three and nine months ended September 30, 2018 and 2017 is as follows (dollars in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018			2017
Balance, beginning of period	$	9,706	$	8,156	$	9,384		$	7,685
Provision (release)	656		977		986			1,444
Translation adjustment	4		4		(4		)	8
Balance, end of period	$	10,366	$	9,137	$	10,366		$	9,137

Impaired Financing Receivables Table

Information regarding the portion of the Company’s mortgage loans that were impaired as of September 30, 2018 and December 31, 2017 is as follows (dollars in thousands):

	Unpaid Principal Balance		Recorded Investment		Related Allowance		Carrying Value
September 30, 2018:
Impaired mortgage loans with no valuation allowance recorded	$	30,660	$	30,629	$	—	$	30,629
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	30,660	$	30,629	$	—	$	30,629
December 31, 2017:
Impaired mortgage loans with no valuation allowance recorded	$	6,427	$	5,858	$	—	$	5,858
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	6,427	$	5,858	$	—	$	5,858
The Company’s average investment in impaired mortgage loans and the related interest income are reflected in the table below for the periods indicated (dollars in thousands):
	Three months ended September 30,
	2018				2017
	Average Recorded Investment(1)		Interest Income		Average Recorded   Investment(1)		Interest Income
Impaired mortgage loans with no valuation allowance recorded	$	30,641	$	346	$	3,967	$	33
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	30,641	$	346	$	3,967	$	33
	Nine months ended September 30,
	2018				2017
	Average Recorded Investment(1)		Interest Income		Average Recorded Investment(1)		Interest Income
Impaired mortgage loans with no valuation allowance recorded	$	22,641	$	650	$	3,062	$	100
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	22,641	$	650	$	3,062	$	100

(1) Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balances.

Schedule Of Other Invested Assets [Table Text Block]

Carrying values of these assets as of September 30, 2018 and December 31, 2017 are as follows (dollars in thousands):

	September 30, 2018		December 31, 2017
Limited partnership interests and real estate joint ventures	$	924,006	$	781,124
Equity release mortgages	383,450		219,940
Derivatives	101,124		137,613
FVO contractholder-directed unit-linked investments	212,315		218,541
Other	86,084		148,114
Total other invested assets	$	1,706,979	$	1,505,332

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Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value

The following table presents the notional amounts and gross fair value of derivative instruments prior to taking into account the netting effects of master netting agreements as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018						December 31, 2017
	Notional		Carrying Value/Fair Value				Notional		Carrying Value/Fair Value
	Amount		Assets		Liabilities		Amount		Assets		Liabilities
Derivatives not designated as hedging instruments:
Interest rate swaps	$	1,074,173	$	37,238	$	1,818	$	996,204	$	59,809	$	2,372
Financial futures	347,916		—		—		412,438		—		—
Foreign currency forwards	—		—		—		6,030		—		28
Consumer price index swaps	409,023		127		2,836		221,932		—		2,160
Credit default swaps	1,373,300		6,759		114		961,200		8,319		1,651
Equity options	571,845		19,372		—		632,251		23,271		—
Longevity swaps	928,320		46,090		—		960,400		40,659		—
Mortality swaps	25,000		—		308		—		—		1,683
Synthetic guaranteed investment contracts	10,844,558		—		—		10,052,576		—		—
Embedded derivatives in:
Modified coinsurance or funds withheld arrangements	—		142,529		—		—		122,194		—
Indexed annuity products	—		—		815,970		—		—		861,758
Variable annuity products	—		—		90,229		—		—		152,470
Total non-hedging derivatives	15,574,135		252,115		911,275		14,243,031		254,252		1,022,122
Derivatives designated as hedging instruments:
Interest rate swaps	435,000		99		20,579		435,000		—		20,389
Foreign currency swaps	537,249		46,141		3,770		672,921		65,207		8,496
Foreign currency forwards	834,238		8,948		2,067		553,175		1,265		7,720
Total hedging derivatives	1,806,487		55,188		26,416		1,661,096		66,472		36,605
Total derivatives	$	17,380,622	$	307,303	$	937,691	$	15,904,127	$	320,724	$	1,058,727

Offsetting Assets [Table Text Block]

The following table provides information relating to the Company’s derivative instruments as of September 30, 2018 and December 31, 2017 (dollars in thousands):

								Gross Amounts Not Offset in the Balance Sheet
	Gross Amounts    Recognized		Gross Amounts Offset in the Balance Sheet			Net Amounts Presented in the Balance Sheet		Financial Instruments (1)			Cash Collateral    Pledged/ Received			Net Amount
September 30, 2018:
Derivative assets	$	164,774	$	(17,560	)	$	147,214	$	—		$	(159,194	)	$	(11,980	)
Derivative liabilities	31,492		(17,560		)	13,932		(61,293		)	(13,400		)	(60,761		)
December 31, 2017:
Derivative assets	$	198,530	$	(20,258	)	$	178,272	$	(862	)	$	(185,900	)	$	(8,490	)
Derivative liabilities	44,499		(20,258		)	24,241		(58,156		)	(22,221		)	(56,136		)

(1) Includes initial margin posted to a central clearing partner.

Offsetting Liabilities [Table Text Block]

The following table provides information relating to the Company’s derivative instruments as of September 30, 2018 and December 31, 2017 (dollars in thousands):

								Gross Amounts Not Offset in the Balance Sheet
	Gross Amounts    Recognized		Gross Amounts Offset in the Balance Sheet			Net Amounts Presented in the Balance Sheet		Financial Instruments (1)			Cash Collateral    Pledged/ Received			Net Amount
September 30, 2018:
Derivative assets	$	164,774	$	(17,560	)	$	147,214	$	—		$	(159,194	)	$	(11,980	)
Derivative liabilities	31,492		(17,560		)	13,932		(61,293		)	(13,400		)	(60,761		)
December 31, 2017:
Derivative assets	$	198,530	$	(20,258	)	$	178,272	$	(862	)	$	(185,900	)	$	(8,490	)
Derivative liabilities	44,499		(20,258		)	24,241		(58,156		)	(22,221		)	(56,136		)

(1) Includes initial margin posted to a central clearing partner.

Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

The gain or loss on the hedged item attributable to a change in foreign currency and the offsetting gain or loss on the related foreign currency swaps as of September 30, 2018 and 2017, were (dollars in thousands):

Type of Fair Value Hedge	Hedged Item	Gains (Losses) Recognized for Derivatives (1)			Gains (Losses) Recognized for Hedged Items (1)
For the three months ended September 30, 2018:
Foreign currency swaps	Foreign-denominated fixed maturity securities	$	(2,258	)	$	2,832
For the three months ended September 30, 2017:
Foreign currency swaps	Foreign-denominated fixed maturity securities	$	2,100		$	(2,100	)
For the nine months ended September 30, 2018:
Foreign currency swaps	Foreign-denominated fixed maturity securities	$	(5,284	)	$	9,666
For the nine months ended September 30, 2017:
Foreign currency swaps	Foreign-denominated fixed maturity securities	$	9,541		$	(9,541	)

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following table presents the components of AOCI, before income tax, and the condensed consolidated income statement classification where the gain or loss is recognized related to cash flow hedges for the three and nine months ended September 30, 2018 and 2017 (dollars in thousands):

	Three months ended September 30,
	2018			2017
Balance beginning of period	$	22,656		$	7,690
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	6,671			(6,889		)
Amounts reclassified to investment related (gains) losses, net	—			(183		)
Amounts reclassified to investment income	(50		)	(271		)
Amounts reclassified to interest expense	(234		)	—
Balance end of period	$	29,043		$	347
	Nine months ended September 30,
	2018			2017
Balance beginning of period	$	2,619		$	(2,496	)
Gains (losses) deferred in other comprehensive income (loss) on the effective portion of cash flow hedges	26,586			3,689
Amounts reclassified to investment related (gains) losses, net	—			(142		)
Amounts reclassified to investment income	(270		)	(704		)
Amounts reclassified to interest expense	108			—
Balance end of period	$	29,043		$	347

Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

The following table presents the effective portion of derivatives in cash flow hedging relationships on the condensed consolidated statements of income and the condensed consolidated statements of comprehensive income for the three and nine months ended September 30, 2018 and 2017 (dollars in thousands):

	Effective Portion
Derivative Type	Gain (Loss) Deferred in OCI			Gain (Loss) Reclassified into Income from OCI
				Investment Related Gains (Losses)		Investment Income		Interest Expense
For the three months ended September 30, 2018:
Interest rate	$	7,490		$	—	$	—	$	234
Currency/Interest rate	(819		)	—		50		—
Total	$	6,671		$	—	$	50	$	234
For the three months ended September 30, 2017:
Interest rate	$	(8,421	)	$	—	$	—	$	—
Currency/Interest rate	1,544			—		230		—
Forward bond purchase commitments	(12		)	183		41		—
Total	$	(6,889	)	$	183	$	271	$	—
For the nine months ended September 30, 2018:
Interest rate	$	27,217		$	—	$	—	$	(108	)
Currency/Interest rate	(631		)	—		270		—
Total	$	26,586		$	—	$	270	$	(108	)
For the nine months ended September 30, 2017:
Interest rate	$	(6,205	)	$	—	$	—	$	—
Currency/Interest rate	9,894			—		560		—
Forward bond purchase commitments	—			142		144		—
Total	$	3,689		$	142	$	704	$	—

Schedule of Net Investment Hedges, Statements of Financial Performance and Financial Position, Location [Table Text Block]

The following table illustrates the Company’s net investments in foreign operations (“NIFO”) hedges for the three and nine months ended September 30, 2018 and 2017 (dollars in thousands):

	Derivative Gains (Losses) Deferred in AOCI
	For the three months ended September 30,						For the nine months ended September 30,
Type of NIFO Hedge (1) (2)	2018			2017			2018		2017
Foreign currency swaps	$	(5,877	)	$	(35,198	)	$	11,125	$	(60,723	)
Foreign currency forwards	(11,562		)	4,627			11,737		8,785
Total	$	(17,439	)	$	(30,571	)	$	22,862	$	(51,938	)

(1) There were no sales or substantial liquidations of net investments in foreign operations that would have required the reclassification of gains or losses from accumulated other comprehensive income (loss) into investment income during the periods presented.

(2) There was no ineffectiveness recognized for the Company’s hedges of net investments in foreign operations.

Derivatives Not Designated as Hedging Instruments [Table Text Block]

A summary of the effect of non-hedging derivatives, including embedded derivatives, on the Company’s condensed consolidated statements of income for the three and nine months ended September 30, 2018 and 2017 is as follows (dollars in thousands):

		Gain (Loss) for the three months ended September 30,
Type of Non-hedging Derivative	Income Statement Location of Gain (Loss)	2018			2017
Interest rate swaps	Investment related gains (losses), net	$	(12,228	)	$	641
Financial futures	Investment related gains (losses), net	(6,544		)	(8,890		)
Foreign currency forwards	Investment related gains (losses), net	(58		)	24
CPI swaps	Investment related gains (losses), net	(4,223		)	220
Credit default swaps	Investment related gains (losses), net	4,689			4,137
Equity options	Investment related gains (losses), net	(9,793		)	(8,295		)
Longevity swaps	Other revenues	2,426			3,334
Mortality swaps	Other revenues	473			(132		)
Subtotal		(25,258		)	(8,961		)
Embedded derivatives in:
Modified coinsurance or funds withheld arrangements	Investment related gains (losses), net	(2,081		)	23,044
Indexed annuity products	Interest credited	(25,347		)	(13,133		)
Variable annuity products	Investment related gains (losses), net	32,133			(6,205		)
Total non-hedging derivatives		$	(20,553	)	$	(5,255	)
		Gain (Loss) for the nine months ended         September 30,
Type of Non-hedging Derivative	Income Statement Location of Gain (Loss)	2018			2017
Interest rate swaps	Investment related gains (losses), net	$	(47,399	)	$	12,318
Financial futures	Investment related gains (losses), net	(7,312		)	(28,107		)
Foreign currency forwards	Investment related gains (losses), net	3			577
CPI swaps	Investment related gains (losses), net	(996		)	211
Credit default swaps	Investment related gains (losses), net	5,371			15,374
Equity options	Investment related gains (losses), net	(15,207		)	(34,757		)
Longevity swaps	Other revenues	6,983			7,180
Mortality swaps	Other revenues	(326		)	(921		)
Subtotal		(58,883		)	(28,125		)
Embedded derivatives in:
Modified coinsurance or funds withheld arrangements	Investment related gains (losses), net	20,335			106,854
Indexed annuity products	Interest credited	6,523			(35,490		)
Variable annuity products	Investment related gains (losses), net	62,242			16,518
Total non-hedging derivatives		$	30,217		$	59,757

Disclosure Of Credit Derivatives

The following table presents the estimated fair value, maximum amount of future payments and weighted average years to maturity of credit default swaps sold by the Company at September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30, 2018						December 31, 2017
Rating Agency Designation of Referenced Credit Obligations(1)	Estimated Fair Value of Credit   Default Swaps			Maximum Amount of Future Payments under Credit Default Swaps(2)		Weighted Average Years to Maturity(3)	Estimated Fair Value of Credit   Default Swaps			Maximum Amount of Future Payments under Credit Default Swaps(2)		Weighted Average Years to Maturity(3)
AAA/AA+/AA/AA-/A+/A/A-
Single name credit default swaps	$	2,470		$	152,000	2.5	$	3,128		$	162,000	2.9
Subtotal	2,470			152,000		2.5	3,128			162,000		2.9
BBB+/BBB/BBB-
Single name credit default swaps	4,220			343,700		2.4	4,469			361,700		2.9
Credit default swaps referencing indices	(80		)	642,600		3.4	(55		)	422,600		4.0
Subtotal	4,140			986,300		3.1	4,414			784,300		3.5
BB+/BB/BB-
Single name credit default swaps	32			15,000		1.0	30			5,000		1.5
Subtotal	32			15,000		1.0	30			5,000		1.5
Total	$	6,642		$	1,153,300	3.0	$	7,572		$	951,300	3.4

(1) The rating agency designations are based on ratings from Standard and Poor’s (“S&P”).

(2) Assumes the value of the referenced credit obligations is zero.

(3) The weighted average years to maturity of the credit default swaps is calculated based on weighted average notional amounts.

Changes In Estimated Fair Value Related To Embedded Derivatives

The related gains (losses) and the effect on net income after amortization of deferred acquisition costs (“DAC”) and income taxes for the three and nine months ended September 30, 2018 and 2017 are reflected in the following table (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Embedded derivatives in modco or funds withheld arrangements included in investment related gains	$	(2,081	)	$	23,044		$	20,335		$	106,854
After the associated amortization of DAC and taxes, the related amounts included in net income	(1,320		)	7,515			11,517			36,300
Embedded derivatives in variable annuity contracts included in investment related gains	32,133			(6,205		)	62,242			16,518
After the associated amortization of DAC and taxes, the related amounts included in net income	9,463			(1,074		)	33,061			30,785
Amounts related to embedded derivatives in equity-indexed annuities included in benefits and expenses	(25,347		)	(13,133		)	6,523			(35,490		)
After the associated amortization of DAC and taxes, the related amounts included in net income	(17,311		)	(9,737		)	(6,808		)	(38,059		)

Credit Risk

Information regarding the Company’s credit exposure related to its over-the-counter derivative contracts, centrally cleared derivative contracts and margin account for exchange-traded futures, excluding mortality swaps, at September 30, 2018 and December 31, 2017 are reflected in the following table (dollars in thousands):

	September 30, 2018			December 31, 2017
Estimated fair value of derivatives in net asset position	$	133,590		$	155,714
Cash provided as collateral(1)	13,400			22,221
Securities pledged to counterparties as collateral(2)	61,293			58,156
Cash pledged from counterparties as collateral(3)	(159,194		)	(185,900		)
Securities pledged from counterparties as collateral(4)	—			(862		)
Initial margin for cleared derivatives(2)	(61,293		)	(58,156		)
Net amount after application of master netting agreements and collateral	$	(12,204	)	$	(8,827	)
Margin account related to exchange-traded futures(5)	$	8,348		$	6,538

(1) Consists of receivable from counterparty, included in other assets.

(2) Included in available-for-sale securities, primarily consists of U.S. Treasury and government agency securities.

(3) Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities.

(4) Consists of U.S. Treasury and government securities.

(5) Included in other assets.

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Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Schedule Of Fair Value Assets and Liabilities Measured on Recurring Basis Table Text Block

Assets and liabilities measured at fair value on a recurring basis as of September 30, 2018 and December 31, 2017 are summarized below (dollars in thousands):

September 30, 2018:				Fair Value Measurements Using:
	Total			Level 1		Level 2			Level 3
Assets:
Fixed maturity securities – available-for-sale:
Corporate	$	24,449,498		$	—	$	23,193,563		$	1,255,935
Canadian government	4,036,750			—		3,488,008			548,742
RMBS	1,780,762			—		1,780,762			—
ABS	1,863,017			—		1,780,250			82,767
CMBS	1,273,534			—		1,271,752			1,782
U.S. government	1,412,409			1,284,932		107,225			20,252
State and political subdivisions	911,991			—		898,346			13,645
Other foreign government	3,277,251			—		3,272,239			5,012
Total fixed maturity securities – available-for-sale	39,005,212			1,284,932		35,792,145			1,928,135
Equity securities	101,069			57,584		—			43,485
Funds withheld at interest – embedded derivatives	142,529			—		—			142,529
Cash equivalents	657,280			657,280		—			—
Short-term investments	186,051			5,957		177,891			2,203
Other invested assets:
Derivatives:
Interest rate swaps	29,106			—		29,106			—
Foreign currency forwards	6,881			—		6,881			—
CPI swaps	(13		)	—		(13		)	—
Credit default swaps	5,961			—		5,961			—
Equity options	16,818			—		16,818			—
Foreign currency swaps	42,371			—		42,371			—
FVO contractholder-directed unit-linked investments	212,315			211,253		1,062			—
Total other invested assets	313,439			211,253		102,186			—
Other assets - longevity swaps	46,090			—		—			46,090
Total	$	40,451,670		$	2,217,006	$	36,072,222		$	2,162,442
Liabilities:
Interest sensitive contract liabilities – embedded derivatives	$	906,199		$	—	$	—		$	906,199
Other liabilities:
Derivatives:
Interest rate swaps	14,166			—		14,166			—
CPI swaps	2,696			—		2,696			—
Credit default swaps	(684		)	—		(684		)	—
Equity options	(2,554		)	—		(2,554		)	—
Mortality swaps	308			—		—			308
Total	$	920,131		$	—	$	13,624		$	906,507

December 31, 2017:				Fair Value Measurements Using:
	Total			Level 1		Level 2			Level 3
Assets:
Fixed maturity securities – available-for-sale:
Corporate	$	23,210,968		$	—	$	21,873,696		$	1,337,272
Canadian government	4,220,076			—		3,626,134			593,942
RMBS	1,719,880			—		1,611,998			107,882
ABS	1,648,362			—		1,524,888			123,474
CMBS	1,303,387			—		1,300,153			3,234
U.S. government	1,943,592			1,818,006		103,075			22,511
State and political subdivisions	703,428			—		662,225			41,203
Other foreign government	3,401,127			—		3,396,035			5,092
Total fixed maturity securities – available-for-sale	38,150,820			1,818,006		34,098,204			2,234,610
Equity securities:
Non-redeemable preferred stock	39,806			39,806		—			—
Other equity securities	60,346			60,346		—			—
Funds withheld at interest – embedded derivatives	122,194			—		—			122,194
Cash equivalents	356,788			354,071		2,717			—
Short-term investments	50,746			—		47,650			3,096
Other invested assets:
Derivatives:
Interest rate swaps	51,359			—		51,359			—
Foreign currency forwards	730			—		730			—
CPI swaps	(221		)	—		(221		)	—
Credit default swaps	5,908			—		5,908			—
Equity options	16,932			—		16,932			—
Foreign currency swaps	62,905			—		62,905			—
FVO contractholder-directed unit-linked investments	218,541			217,618		923			—
Total other invested assets	356,154			217,618		138,536			—
Other assets - longevity swaps	40,659			—		—			40,659
Total	$	39,177,513		$	2,489,847	$	34,287,107		$	2,400,559
Liabilities:
Interest sensitive contract liabilities – embedded derivatives	$	1,014,228		$	—	$	—		$	1,014,228
Other liabilities:
Derivatives:
Interest rate swaps	14,311			—		14,311			—
Foreign currency forwards	7,213			—		7,213			—
CPI swaps	1,939			—		1,939			—
Credit default swaps	(760		)	—		(760		)	—
Equity options	(6,339		)	—		(6,339		)	—
Foreign currency swaps	6,194			—		6,194			—
Mortality swaps	1,683			—		—			1,683
Total	$	1,038,469		$	—	$	22,558		$	1,015,911

Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Level Transfers [Table Text Block]

The following tables present the transfers between Level 1 and Level 2 during the three and nine months ended September 30, 2017 (dollars in thousands):

	2017
	Transfers from     Level 1 to Level 2		Transfers from     Level 2 to Level 1
Three months ended September 30:
Fixed maturity securities - available-for-sale:
Corporate securities	$	—	$	—
Nine months ended September 30:
Fixed maturity securities - available-for-sale:
Corporate securities	$	—	$	88,674

Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]

The following table presents quantitative information about significant unobservable inputs used in Level 3 fair value measurements that are developed internally by the Company as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	Estimated Fair Value				Valuation Technique	Unobservable Inputs	Range (Weighted Average)
	September 30, 2018		December 31, 2017				September 30, 2018		December 31, 2017
Assets:
Corporate	$	630,328	$	173,579	Market comparable securities	Liquidity premium	0-5% (1%)		0-2%  (1%)
						EBITDA Multiple	5.9x-7.5x (6.9x)		—
ABS	64,475		—		Market comparable securities	Liquidity premium	0-1% (1%)		—
U.S. government	20,252		22,511		Market comparable securities	Liquidity premium	0-1% (1%)		0-1%  (1%)
State and political subdivisions	—		4,616		Market comparable securities	Liquidity premium	—		1	%
Other foreign government	5,012		—		Market comparable securities	Liquidity premium	1	%	—
Equity securities	33,074		—		Market comparable securities	Liquidity premium	4	%	—
						EBITDA Multiple	6.9x-12.3x (7.9x)		—
					Discounted cash flow	Discount rate	20	%
Funds withheld at interest- embedded derivatives	142,529		122,194		Total return swap	Mortality	0-100%  (2%)		0-100%  (2%)
						Lapse	0-35%  (9%)		0-35%  (9%)
						Withdrawal	0-5%  (3%)		0-5%  (3%)
						CVA	0-5%  (1%)		0-5%  (1%)
						Crediting rate	2-4%  (2%)		2-4%  (2%)
Longevity swaps	46,090		40,659		Discounted cash flow	Mortality	0-100%  (2%)		0-100%  (2%)
						Mortality improvement	(10%)-10%  (3%)		(10%)-10%  (3%)
Liabilities:
Interest sensitive contract liabilities- embedded derivatives- indexed annuities	815,970		861,758		Discounted cash flow	Mortality	0-100% (2%)		0-100% (2%)
						Lapse	0-35% (9%)		0-35% (9%)
						Withdrawal	0-5% (3%)		0-5% (3%)
						Option budget projection	2-4% (2%)		2-4% (2%)
Interest sensitive contract liabilities- embedded derivatives- variable annuities	90,229		152,470		Discounted cash  flow	Mortality	0-100% (1%)		0-100% (1%)
						Lapse	0-25% (5%)		0-25% (5%)
						Withdrawal	0-7% (4%)		0-7% (3%)
						CVA	0-5% (1%)		0-5% (1%)
						Long-term volatility	0-27% (13%)		0-27% (8%)
Mortality swaps	308		1,683		Discounted cash flow	Mortality	0-100%  (1%)		0-100%  (1%)

The following table presents quantitative information about significant unobservable inputs used in Level 3 fair value measurements that are developed internally by the Company as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	Estimated Fair Value				Valuation Technique	Unobservable Inputs	Range (Weighted Average)
	September 30, 2018		December 31, 2017				September 30, 2018		December 31, 2017
Assets:
Corporate	$	630,328	$	173,579	Market comparable securities	Liquidity premium	0-5% (1%)		0-2%  (1%)
						EBITDA Multiple	5.9x-7.5x (6.9x)		—
ABS	64,475		—		Market comparable securities	Liquidity premium	0-1% (1%)		—
U.S. government	20,252		22,511		Market comparable securities	Liquidity premium	0-1% (1%)		0-1%  (1%)
State and political subdivisions	—		4,616		Market comparable securities	Liquidity premium	—		1	%
Other foreign government	5,012		—		Market comparable securities	Liquidity premium	1	%	—
Equity securities	33,074		—		Market comparable securities	Liquidity premium	4	%	—
						EBITDA Multiple	6.9x-12.3x (7.9x)		—
					Discounted cash flow	Discount rate	20	%
Funds withheld at interest- embedded derivatives	142,529		122,194		Total return swap	Mortality	0-100%  (2%)		0-100%  (2%)
						Lapse	0-35%  (9%)		0-35%  (9%)
						Withdrawal	0-5%  (3%)		0-5%  (3%)
						CVA	0-5%  (1%)		0-5%  (1%)
						Crediting rate	2-4%  (2%)		2-4%  (2%)
Longevity swaps	46,090		40,659		Discounted cash flow	Mortality	0-100%  (2%)		0-100%  (2%)
						Mortality improvement	(10%)-10%  (3%)		(10%)-10%  (3%)
Liabilities:
Interest sensitive contract liabilities- embedded derivatives- indexed annuities	815,970		861,758		Discounted cash flow	Mortality	0-100% (2%)		0-100% (2%)
						Lapse	0-35% (9%)		0-35% (9%)
						Withdrawal	0-5% (3%)		0-5% (3%)
						Option budget projection	2-4% (2%)		2-4% (2%)
Interest sensitive contract liabilities- embedded derivatives- variable annuities	90,229		152,470		Discounted cash  flow	Mortality	0-100% (1%)		0-100% (1%)
						Lapse	0-25% (5%)		0-25% (5%)
						Withdrawal	0-7% (4%)		0-7% (3%)
						CVA	0-5% (1%)		0-5% (1%)
						Long-term volatility	0-27% (13%)		0-27% (8%)
Mortality swaps	308		1,683		Discounted cash flow	Mortality	0-100%  (1%)		0-100%  (1%)

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The reconciliations for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) are as follows (dollars in thousands):

For the three months ended September 30, 2018:	Fixed maturity securities - available-for-sale
	Corporate			Canadian government			RMBS			ABS
Fair value, beginning of period	$	1,367,154		$	572,698		$	54,839		$	70,686
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	(156		)	3,520			3			20
Investment related gains (losses), net	239			—			—			626
Included in other comprehensive income	(4,858		)	(27,476		)	(1		)	(130		)
Purchases(1)	123,808			—			—			11,099
Sales(1)	(62,047		)	—			—			(462		)
Settlements(1)	(101,868		)	—			(3		)	(24,166		)
Transfers into Level 3	2,782			—			—			64,009
Transfers out of Level 3	(69,119		)	—			(54,838		)	(38,915		)
Fair value, end of period	$	1,255,935		$	548,742		$	—		$	82,767
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	(180	)	$	3,520		$	—		$	13
Investment related gains (losses), net	(1,430		)	—			—			—

For the three months ended September 30, 2018 (continued):	Fixed maturity securities available-for-sale
	CMBS			U.S. government			State and political subdivisions			Other foreign government
Fair value, beginning of period	$	1,867		$	20,735		$	16,505		$	5,044
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	—			(107		)	6			—
Included in other comprehensive income	7			(122		)	(544		)	(32		)
Purchases(1)	—			120			—			—
Settlements(1)	(1		)	(374		)	(37		)	—
Transfers into Level 3	1,752			—			9,859			—
Transfers out of Level 3	(1,843		)	—			(12,144		)	—
Fair value, end of period	$	1,782		$	20,252		$	13,645		$	5,012
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	—		$	(107	)	$	6		$	—

For the three months ended September 30, 2018 (continued):	Equity securities			Funds withheld at interest- embedded derivatives			Short-term Investments			Other assets - longevity swaps			Interest sensitive contract liabilities embedded derivatives			Other liabilities - mortality swaps
Fair value, beginning of period	$	42,937		$	144,610		$	3,217		$	43,971		$	(928,797	)	$	(782	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment related gains (losses), net	5,532			(2,081		)	—			—			32,133			—
Interest credited	—			—			—			—			(25,348		)	—
Included in other comprehensive income	—			—			47			(307		)	—			1
Other revenues	—			—			—			2,426			—			473
Purchases(1)	863			—			1,721			—			(4,231		)	—
Sales(1)	(5,847		)	—			—			—			—			—
Settlements(1)	—			—			—			—			20,044			—
Transfers out of Level 3	—			—			(2,782		)	—			—			—
Fair value, end of period	$	43,485		$	142,529		$	2,203		$	46,090		$	(906,199	)	$	(308	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment related gains (losses), net	$	2,178		$	(2,081	)	$	—		$	—		$	30,433		$	—
Other revenues	—			—			—			2,426			—			473
Interest credited	—			—			—			—			(45,393		)	—

For the nine months ended September 30, 2018:	Fixed maturity securities - available-for-sale
	Corporate			Canadian government			RMBS			ABS
Fair value, beginning of period	$	1,337,272		$	593,942		$	107,882		$	123,474
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	(822		)	10,432			(132		)	202
Investment related gains (losses), net	(2,902		)	—			312			1,910
Included in other comprehensive income	(35,532		)	(55,632		)	(1,782		)	(821		)
Purchases(1)	379,476			—			45,328			22,099
Sales(1)	(79,316		)	—			(4,961		)	(462		)
Settlements(1)	(245,342		)	—			(4,538		)	(46,449		)
Transfers into Level 3	9,948			—			3,031			68,977
Transfers out of Level 3	(106,847		)	—			(145,140		)	(86,163		)
Fair value, end of period	$	1,255,935		$	548,742		$	—		$	82,767
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	(845	)	$	10,432		$	—		$	187
Investment related gains (losses), net	(4,571		)	—			—			—

For the nine months ended September 30, 2018 (continued):	Fixed maturity securities available-for-sale
	CMBS			U.S. government			State and political subdivisions			Other foreign government
Fair value, beginning of period	$	3,234		$	22,511		$	41,203		$	5,092
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	—			(324		)	4			—
Included in other comprehensive income	(56		)	(635		)	46			(80		)
Purchases(1)	—			334			—			—
Settlements(1)	(4		)	(1,634		)	(158		)	—
Transfers into Level 3	1,752			—			9,859			—
Transfers out of Level 3	(3,144		)	—			(37,309		)	—
Fair value, end of period	$	1,782		$	20,252		$	13,645		$	5,012
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	—		$	(325	)	$	3		$	—

For the nine months ended September 30, 2018 (continued):	Equity securities			Funds withheld at interest- embedded derivatives		Short-term Investments			Other assets - longevity swaps			Interest sensitive contract liabilities embedded derivatives			Other liabilities - mortality swaps
Fair value, beginning of period	$	—		$	122,194	$	3,096		$	40,659		$	(1,014,228	)	$	(1,683	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment related gains (losses), net	(2,067		)	20,335		—			—			62,242			—
Interest credited	—			—		—			—			6,523			—
Included in other comprehensive income	—			—		1			(1,552		)	—			1
Other revenues	—			—		—			6,983			—			(326		)
Purchases(1)	13,111			—		2,202			—			(16,946		)	—
Sales(1)	(6,416		)	—		—			—			—			—
Settlements(1)	(48		)	—		(314		)	—			56,210			1,700
Transfers into Level 3	38,905			—		—			—			—			—
Transfers out of Level 3	—			—		(2,782		)	—			—			—
Fair value, end of period	$	43,485		$	142,529	$	2,203		$	46,090		$	(906,199	)	$	(308	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment related gains (losses), net	$	(5,527	)	$	20,335	$	—		$	—		$	56,808		$	—
Other revenues	—			—		—			6,983			—			(326		)
Interest credited	—			—		—			—			(49,688		)	—

For the three months ended September 30, 2017:	Fixed maturity securities - available-for-sale
	Corporate			Canadian government			RMBS			ABS
Fair value, beginning of period	$	1,291,054		$	533,270		$	148,685		$	201,589
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	(383		)	3,460			(30		)	160
Investment related gains (losses), net	396			—			44			—
Included in other comprehensive income	(2,700		)	(11,365		)	104			(101		)
Purchases(1)	107,670			—			26,765			—
Sales(1)	(26,337		)	—			(3,553		)	—
Settlements(1)	(88,551		)	—			(3,645		)	(15,243		)
Transfers into Level 3	3,844			—			15			36,994
Transfers out of Level 3	(12,973		)	—			(50,390		)	(78,202		)
Fair value, end of period	$	1,272,020		$	525,365		$	117,995		$	145,197
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	(394	)	$	3,460		$	(27	)	$	156

For the three months ended September 30, 2017 (continued):	Fixed maturity securities available-for-sale
	CMBS			U.S. government			State and political subdivisions			Other foreign government
Fair value, beginning of period	$	1,943		$	23,567		$	34,434		$	11,994
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	—			(116		)	26			(1		)
Included in other comprehensive income	5			6			(208		)	(7		)
Purchases(1)	—			134			—			495
Settlements(1)	(1		)	(340		)	(35		)	—
Transfers into Level 3	—			—			7,295			—
Transfers out of Level 3	—			—			—			(6,853		)
Fair value, end of period	$	1,947		$	23,251		$	41,512		$	5,628
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	—		$	(116	)	$	26		$	(1	)

For the three months ended September 30, 2017 (continued):	Short-term Investments			Funds withheld at interest- embedded derivatives		Other assets - longevity swaps		Interest sensitive contract liabilities embedded derivatives			Other liabilities - mortality swaps
Fair value, beginning of period	$	3,548		$	61,281	$	33,349	$	(974,631	)	$	(1,552	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment related gains (losses), net	—			23,044		—		(10,047		)	—
Interest credited	—			—		—		(8,335		)	—
Included in other comprehensive income	(3		)	—		1,144		—			1
Other revenues	—			—		3,334		—			(132		)
Purchases(1)	3,164			—		—		(18,736		)	—
Settlements(1)	(114		)	—		—		21,809			—
Transfers out of Level 3	(3,236		)	—		—		—			—
Fair value, end of period	$	3,359		$	84,325	$	37,827	$	(989,940	)	$	(1,683	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment related gains (losses), net	$	—		$	23,044	$	—	$	(11,900	)	$	—
Other revenues	—			—		3,334		—			(132		)
Interest credited	—			—		—		(30,145		)	—

For the nine months ended September 30, 2017:	Fixed maturity securities - available-for-sale
	Corporate			Canadian government		RMBS			ABS
Fair value, beginning of period	$	1,272,253		$	475,965	$	160,291		$	219,280
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	(1,202		)	9,731		(304		)	1,689
Investment related gains (losses), net	7,592			—		524			—
Included in other comprehensive income	(2,300		)	39,669		2,716			6,802
Purchases(1)	257,671			—		72,582			45,215
Sales(1)	(49,511		)	—		(18,624		)	—
Settlements(1)	(234,552		)	—		(15,084		)	(60,966		)
Transfers into Level 3	35,042			—		5,515			75,752
Transfers out of Level 3	(12,973		)	—		(89,621		)	(142,575		)
Fair value, end of period	$	1,272,020		$	525,365	$	117,995		$	145,197
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	(1,213	)	$	9,731	$	(155	)	$	556
Investment related gains (losses), net	(2,788		)	—		(346		)	—

For the nine months ended September 30, 2017 (continued):	Fixed maturity securities available-for-sale
	CMBS			U.S. government			State and political subdivisions			Other foreign government
Fair value, beginning of period	$	21,145		$	24,488		$	41,666		$	12,869
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment income, net of related expenses	709			(348		)	(68		)	(1		)
Investment related gains (losses), net	(595		)	—			—			—
Included in other comprehensive income	(57		)	269			(228		)	(210		)
Purchases(1)	—			370			—			495
Sales(1)	(3,720		)	—			—			—
Settlements(1)	(5,403		)	(1,528		)	(309		)	(672		)
Transfers into Level 3	—			—			7,295			—
Transfers out of Level 3	(10,132		)	—			(6,844		)	(6,853		)
Fair value, end of period	$	1,947		$	23,251		$	41,512		$	5,628
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment income, net of related expenses	$	—		$	(348	)	$	(68	)	$	(1	)

For the nine months ended September 30, 2017 (continued):	Short-term Investments			Funds withheld at interest- embedded derivatives			Other assets - longevity swaps		Interest sensitive contract liabilities embedded derivatives			Other liabilities - mortality swaps
Fair value, beginning of period	$	3,346		$	(22,529	)	$	26,958	$	(990,308	)	$	(2,462	)
Total gains/losses (realized/unrealized)
Included in earnings, net:
Investment related gains (losses), net	—			106,854			—		9,005			—
Interest credited	—			—			—		(20,408		)	—
Included in other comprehensive income	1			—			3,689		—			1
Other revenues	—			—			7,180		—			(922		)
Purchases(1)	3,520			—			—		(51,276		)	—
Settlements(1)	(272		)	—			—		63,047			1,700
Transfers out of Level 3	(3,236		)	—			—		—			—
Fair value, end of period	$	3,359		$	84,325		$	37,827	$	(989,940	)	$	(1,683	)
Unrealized gains and losses recorded in earnings for the period relating to those Level 3 assets and liabilities that were still held at the end of the period
Included in earnings, net:
Investment related gains (losses), net	$	—		$	106,854		$	—	$	2,934		$	—
Other revenues	—			—			7,180		—			(922		)
Interest credited	—			—			—		(83,456		)	—

(1) The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Table Text Block]

	Carrying Value After Measurement				Net Investment Gains (Losses)
	At September 30,				Three months ended September 30,						Nine months ended September 30,
(dollars in thousands)	2018		2017		2018			2017			2018			2017
Limited partnership interests(1)	$	2,246	$	4,656	$	(1,860	)	$	(896	)	$	(1,860	)	$	(7,204	)
Private equities(2)	—		106		—			(531		)	—			(531		)

(1) The impaired limited partnership interests presented above were accounted for using the cost method. Impairments on these cost method investments were recognized at estimated fair value determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. The market for these investments has limited activity and price transparency.

Financial Instruments Carrying Amounts And Estimated Fair Value [Table Text Block]

The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments, which were not measured at fair value on a recurring basis, as of September 30, 2018 and December 31, 2017 (dollars in thousands). For additional information regarding the methods and significant assumptions used by the Company to estimate these fair values, see Note 6 in the Notes to Consolidated Financial Statements included in the Company’s 2017 Annual Report. This table excludes any payables or receivables for collateral under repurchase agreements and other transactions. The estimated fair value of the excluded amount approximates carrying value as they equal the amount of cash collateral received/paid.

September 30, 2018:	Carrying Value (1)		Estimated  Fair Value		Fair Value Measurement Using:
					Level 1		Level 2		Level 3		NAV
Assets:
Mortgage loans on real estate	$	4,779,074	$	4,652,481	$	—	$	—	$	4,652,481	$	—
Policy loans	1,320,050		1,320,050		—		1,320,050		—		—
Funds withheld at interest	5,833,925		6,040,671		—		—		6,040,671		—
Cash and cash equivalents	1,073,209		1,073,209		1,073,209		—		—		—
Short-term investments	43,877		43,877		43,877		—		—		—
Other invested assets	842,626		839,280		5,618		71,401		382,284		379,977
Accrued investment income	455,296		455,296		—		455,296		—		—
Liabilities:
Interest-sensitive contract liabilities	$	13,319,348	$	13,113,427	$	—	$	—	$	13,113,427	$	—
Long-term debt	2,787,975		2,850,344		—		—		2,850,344		—
Collateral finance and securitization notes	710,792		652,380		—		—		652,380		—
December 31, 2017:	Carrying Value (1)		Estimated Fair Value		Fair Value Measurement Using:
					Level 1		Level 2		Level 3		NAV
Assets:
Mortgage loans on real estate	$	4,400,533	$	4,477,654	$	—	$	—	$	4,477,654	$	—
Policy loans	1,357,624		1,357,624		—		1,357,624		—		—
Funds withheld at interest	5,955,092		6,275,623		—		—		6,275,623		—
Cash and cash equivalents	946,736		946,736		946,736		—		—		—
Short-term investments	42,558		42,558		42,558		—		—		—
Other invested assets	651,792		679,377		28,540		67,778		247,934		335,125
Accrued investment income	392,721		392,721		—		392,721		—		—
Liabilities:
Interest-sensitive contract liabilities	$	12,683,872	$	12,917,243	$	—	$	—	$	12,917,243	$	—
Long-term debt	2,788,365		2,959,912		—		—		2,959,912		—
Collateral finance and securitization notes	783,938		722,145		—		—		722,145		—

(1) Carrying values presented herein may differ from those in the Company’s condensed consolidated balance sheets because certain items within the respective financial statement captions may be measured at fair value on a recurring basis.

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Segment Information (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Reconciliation Of Revenue From Segments To Consolidated Text Block

Information related to revenues, income (loss) before income taxes and total assets of the Company for each reportable segment are summarized below (dollars in thousands).

	Three months ended September 30,				Nine months ended September 30,
Revenues:	2018		2017		2018		2017
U.S. and Latin America:
Traditional	$	1,547,790	$	1,521,383	$	4,601,631	$	4,532,584
Financial Solutions	290,848		264,170		734,148		834,992
Total	1,838,638		1,785,553		5,335,779		5,367,576
Canada:
Traditional	295,962		281,095		910,480		814,643
Financial Solutions	12,168		12,430		37,034		36,240
Total	308,130		293,525		947,514		850,883
Europe, Middle East and Africa:
Traditional	357,059		360,972		1,123,379		1,024,978
Financial Solutions	91,664		77,041		280,482		230,435
Total	448,723		438,013		1,403,861		1,255,413
Asia Pacific:
Traditional	578,035		561,660		1,763,094		1,628,419
Financial Solutions	16,167		16,932		54,005		55,368
Total	594,202		578,592		1,817,099		1,683,787
Corporate and Other	37,838		49,627		92,893		125,667
Total	$	3,227,531	$	3,145,310	$	9,597,146	$	9,283,326

Reconciliation Of Operating Profit Loss From Segments To Consolidated Text Block

	Three months ended September 30,						Nine months ended September 30,
Income (loss) before income taxes:	2018			2017			2018			2017
U.S. and Latin America:
Traditional	$	116,328		$	160,512		$	191,198		$	281,066
Financial Solutions	87,073			89,118			236,882			299,689
Total	203,401			249,630			428,080			580,755
Canada:
Traditional	21,149			28,789			66,661			80,953
Financial Solutions	1,646			4,472			8,381			12,489
Total	22,795			33,261			75,042			93,442
Europe, Middle East and Africa:
Traditional	18,370			15,421			40,259			40,751
Financial Solutions	56,205			30,953			160,738			91,776
Total	74,575			46,374			200,997			132,527
Asia Pacific:
Traditional	62,007			26,564			143,756			121,574
Financial Solutions	206			(229		)	8,365			11,020
Total	62,213			26,335			152,121			132,594
Corporate and Other	(40,323		)	(15,438		)	(148,366		)	(51,997		)
Total	$	322,661		$	340,162		$	707,874		$	887,321

Reconciliation Of Assets From Segment To Consolidated Text Block

Assets:	September 30, 2018		December 31, 2017
U.S. and Latin America:
Traditional	$	19,148,790	$	18,603,423
Financial Solutions	19,251,832		15,959,206
Total	38,400,622		34,562,629
Canada:
Traditional	4,210,051		4,161,452
Financial Solutions	146,374		126,372
Total	4,356,425		4,287,824
Europe, Middle East and Africa:
Traditional	3,573,449		3,099,495
Financial Solutions	4,585,297		5,274,993
Total	8,158,746		8,374,488
Asia Pacific:
Traditional	5,312,822		4,915,442
Financial Solutions	1,181,954		1,198,585
Total	6,494,776		6,114,027
Corporate and Other	5,562,073		7,175,850
Total	$	62,972,642	$	60,514,818

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Commitments, Contingencies and Guarantees (Tables)

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]

The Company’s commitments to fund investments as of September 30, 2018 and December 31, 2017 are presented in the following table (dollars in thousands):

	September 30, 2018		December 31, 2017
Limited partnership interests and joint ventures	$	578,944	$	485,197
Commercial mortgage loans	120,571		40,815
Bank loans and private placements	101,992		60,472
Equity release mortgages	213,459		153,937

Other Commitments [Table Text Block]

The following table presents the maximum potential obligation for these commitments as of September 30, 2018 (dollars in millions):

Commitment Period:	Maximum Potential Obligation
2023	$	500.0
2033	450.0
2034	2,000.0
2035	1,314.2
2036	1,932.0
2037	6,750.0
2038	800.0

Schedule of Guarantor Obligations [Table Text Block]

RGA’s guarantees issued as of September 30, 2018 and December 31, 2017 are reflected in the following table (dollars in thousands):

	September 30, 2018		December 31, 2017
Treaty guarantees	$	1,073,184	$	1,047,449
Treaty guarantees, net of assets in trust	966,099		926,393
Securities borrowing and repurchase arrangements	276,190		294,325
Financing arrangements	69,221		86,183
Lease obligations	881		1,662

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Income Tax (Tables)

9 Months Ended

Sep. 30, 2018

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

three and nine months ended September 30, 2018 and 2017, respectively (dollars in thousands):

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Tax provision at U.S. statutory rate	$	67,759		$	119,057		$	148,654		$	310,562
Increase (decrease) in income taxes resulting from:
U.S. Tax Reform provisional adjustments	664			—			(2,685		)	—
U.S. Tax Reform valuation allowance adjustments	(58,949		)	—			(59,139		)	—
Foreign tax rate differing from U.S. tax rate	7,537			(3,635		)	8,795			(14,049		)
Differences in tax bases in foreign jurisdictions	(2,371		)	2,126			(9,264		)	(14,633		)
Deferred tax valuation allowance	(5,334		)	(2,501		)	5,357			11,627
Amounts related to tax audit contingencies	1,851			299			650			(873		)
Corporate rate changes	(166		)	(1,139		)	30			(2,332		)
Subpart F	(99		)	64			211			1,390
Foreign tax credits	(544		)	1,230			(1,003		)	(834		)
Global intangible low-taxed income, net of credit	7,624			—			11,916			—
Equity compensation excess benefit	(817		)	(2,762		)	(5,067		)	(7,226		)
Return to provision adjustments	4,213			452			4,108			133
Other, net	94			(620		)	(492		)	(1,737		)
Total provision for income taxes	$	21,462		$	112,571		$	102,071		$	282,028
Effective tax rate	6.7		%	33.1		%	14.4		%	31.8		%

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Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Schedule Of Defined Benefit Plans Disclosures Text Block

The components of net periodic benefit costs, included in other operating expenses on the condensed consolidated statements of income, for the three and nine months ended September 30, 2018 and 2017 were as follows (dollars in thousands):

	Pension Benefits						Other Benefits
	Three months ended September 30,						Three months ended September 30,
	2018			2017			2018			2017
Service cost	$	3,106		$	2,699		$	999		$	465
Interest cost	1,341			1,314			680			459
Expected return on plan assets	(1,884		)	(1,554		)	—			—
Amortization of prior service cost (credit)	82			85			(328		)	(675		)
Amortization of prior actuarial losses	929			1,081			937			580
Settlements	—			256			—			—
Net periodic benefit cost	$	3,574		$	3,881		$	2,288		$	829

	Pension Benefits						Other Benefits
	Nine months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Service cost	$	9,330		$	8,098		$	2,271		$	1,907
Interest cost	4,028			3,943			1,739			1,589
Expected return on plan assets	(5,651		)	(4,662		)	—			—
Amortization of prior service cost (credit)	247			254			(986		)	(986		)
Amortization of prior actuarial losses	2,792			3,244			1,933			1,494
Settlements	—			769			—			—
Net periodic benefit cost	$	10,746		$	11,646		$	4,957		$	4,004

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Reinsurance (Tables)

9 Months Ended

Sep. 30, 2018

Retrocession Arrangements And Reinsurance Ceded Receivables [Abstract]

Ceded Credit Risk [Table Text Block]

The following table presents information for the Company’s reinsurance ceded receivable assets, including the respective amount and A.M. Best rating for each reinsurer representing in excess of five percent of the total as of September 30, 2018 or December 31, 2017 (dollars in thousands):

		September 30, 2018				December 31, 2017
Reinsurer	A.M. Best Rating	Amount		% of Total		Amount		% of Total
Reinsurer A	A+	$	303,942	39.5		$	301,478	38.6	%
Reinsurer B	A+	203,702		26.5		203,898		26.1
Reinsurer C	A	67,599		8.8		67,723		8.7
Reinsurer D	A+	41,049		5.3		40,528		5.2
Reinsurer E	A++	35,090		4.6		40,592		5.2
Other reinsurers		117,942		15.3		127,808		16.2
Total		$	769,324	100.0	%	$	782,027	100.0	%

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Earnings Per Share (Reconciliation of the Numerators and Denominators of the Basic and Diluted Per Shares) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Net income (numerator for basic and diluted calculations)	$ 301,199	$ 227,591	$ 605,803	$ 605,293
Shares:
Weighted average outstanding shares (denominator for basic calculation)	63,279	64,488	63,941	64,430
Equivalent shares from outstanding stock options	1,017	1,165	1,189	1,174
Denominator for diluted calculation	64,296	65,653	65,130	65,604
Earnings Per Share:
Basic earnings per share	$ 4.76	$ 3.53	$ 9.47	$ 9.39
Diluted earnings per share	$ 4.68	$ 3.47	$ 9.30	$ 9.23

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Earnings Per Share (Stock Options and Performance Shares Excluded From Common Equivalent Shares) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	227	87	349	296
Stock Compensation Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	276	307	256	293

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Equity (Common Stock Changes In Number of Shares Issued, Held In Treasury and Outstanding) (Details) - shares		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Common Stock, Shares, Issued		79,137,758		79,137,758		79,137,758
Treasury Stock, Shares, Acquired				1,800,000	200,000
Common Stock Issuable [Member]
Class of Stock [Line Items]
Common Stock, Shares, Issued		79,137,758	79,137,758	79,137,758	79,137,758	79,137,758	79,137,758
Treasury Stock, Shares, Acquired		0	0
Stock Based Compensation Shares	[1]	0	0
Common Stock Held In Treasury [Member]
Class of Stock [Line Items]
Common Stock, Shares, Issued		16,186,890	14,769,487	16,186,890	14,769,487	14,685,663	14,835,256
Treasury Stock, Shares, Acquired		1,750,295	208,680
Stock Based Compensation Shares	[1]	(249,068)	(274,449)
Common Stock Outstanding [Member]
Class of Stock [Line Items]
Common Stock, Shares, Issued		62,950,868	64,368,271	62,950,868	64,368,271	64,452,095	64,302,502
Treasury Stock, Shares, Acquired		(1,750,295)	(208,680)
Stock Based Compensation Shares	[1]	(249,068)	(274,449)

[1] Represents net shares issued from treasury pursuant to the Company’s equity-based compensation programs.

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Equity (Balance of and Changes in Each Component of AOCI) (Details) - USD ($) $ in Thousands		9 Months Ended		12 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Accumulated other comprehensive income		$ 812,805	$ 1,625,757	$ 2,063,631	$ 1,139,329
Other Comprehensive Income (Loss), before Reclassifications, before Tax		(1,666,514)	694,490
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		83,491	(47,401)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		2,573		156,400
Other Comprehensive Income (Loss), Tax		334,770	(160,661)
Accumulated Translation Adjustment [Member]
Accumulated other comprehensive income		(119,298)	(104,456)	(86,350)	(172,541)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		(24,977)	23,117
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0	0
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		(2,573)
Other Comprehensive Income (Loss), Tax		5,398	(44,968)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated other comprehensive income	[1]	982,352	1,770,903	2,200,661	1,355,033
Other Comprehensive Income (Loss), before Reclassifications, before Tax	[1]	(1,638,146)	671,564
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	79,505	(51,407)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	[1]	0
Other Comprehensive Income (Loss), Tax	[1]	340,332	(204,287)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated other comprehensive income		(50,249)	(40,690)	$ (50,680)	$ (43,163)
Other Comprehensive Income (Loss), before Reclassifications, before Tax		(3,391)	(191)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		3,986	4,006
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		0
Other Comprehensive Income (Loss), Tax		$ (164)	$ (1,342)

[1] Includes cash flow hedges of $29,043 and $2,619 as of September 30, 2018 and December 31, 2017, respectively, and $347 and $(2,496) as of September 30, 2017 and December 31, 2016, respectively. See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.

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Equity (Balance of and Changes in Each Component of AOCI) (Footnote) (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 29,043	$ 347	$ 22,656	$ 7,690	$ 29,043	$ 347	$ 2,619	$ (2,496)

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Equity (Schedule of Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2018		Sep. 30, 2017		Sep. 30, 2018		Sep. 30, 2017
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Investment related gains (losses), net		$ (9,312)		$ 23,043		$ (17,004)		$ 160,451
Investment income		572,742		556,918		1,617,132		1,589,820
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		322,661		340,162		707,874		887,321
Income Tax Expense (Benefit)		(21,462)		(112,571)		(102,071)		(282,028)
Net income		301,199		227,591		605,803		605,293
Unrealized Appreciation Depreciation Of Investments [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		(25,858)		12,085		(79,505)		51,407
Income Tax Expense (Benefit)		5,355		(3,991)		16,978		(16,015)
Net income		(20,503)		8,094		(62,527)		35,392
Unrealized Appreciation Depreciation Of Investments [Member] | Unrealized Gains Losses On Available For Sale Securities [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Investment related gains (losses), net		(21,249)		10,515		(60,347)		39,032
Unrealized Appreciation Depreciation Of Investments [Member] | Interest Rate Swap [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	[1]	234		0		(108)		0
Unrealized Appreciation Depreciation Of Investments [Member] | Currency Swap [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	[1]	50		230		270		560
Unrealized Appreciation Depreciation Of Investments [Member] | Forward Contracts [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	[1]	0		224		0		286
Unrealized Appreciation Depreciation Of Investments [Member] | DAC Attributed To Unrealized Gains Losses [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Deferred policy acquisition costs attributed to unrealized gains and losses		(4,893)	[1]	1,116	[1]	19,320	[2]	11,529	[2]
Amortization Of Unrealized Pension And Postretirement Benefits [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		(1,620)		(1,071)		(3,986)		(4,006)
Income Tax Expense (Benefit)		340		375		837		1,402
Net income		(1,280)		(696)		(3,149)		(2,604)
Amounts Reclassified From AOCI [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net income		(21,783)		7,398		(65,676)		32,788
Prior Service Cost [Member] | Amortization Of Unrealized Pension And Postretirement Benefits [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Prior service cost		246	[2]	590	[2]	739	[3]	732	[3]
Actuarial Gains Losses [Member] | Amortization Of Unrealized Pension And Postretirement Benefits [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Actuarial gains/(losses)		$ (1,866)	[2]	$ (1,661)	[2]	$ 4,725	[3]	$ (4,738)	[3]

[1] See Note 5 - “Derivative Instruments” for additional information on cash flow hedges.

[2] This AOCI component is included in the computation of the deferred policy acquisition cost. See Note 8 – “Deferred Policy Acquisition Costs” of the 2017 Annual Report for additional details.

[3] This AOCI component is included in the computation of the net periodic pension cost. See Note 10 – “Employee Benefit Plans” for additional details.

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Equity (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Equity [Abstract]
Stock Repurchase Program, Authorized Amount	$ 400.0
Treasury Stock, Shares, Acquired	1.8	0.2
Treasury Stock, Value, Acquired, Cost Method	$ 258.5	$ 26.9

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Equity Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity compensation expense	$ 28.4	$ 17.1
Stock appreciation rights granted	200,000
Stock appreciation rights granted, weighted average exercise price (per share)	$ 150.87
Performance contingent units	100,000
Shares Granted To Non Employee Directors	7,623
Options exercisable (shares)	1,500,000
Options exercisable, weighted average price (per share)	$ 66.48
Options, remaining term	4 years 3 months
Compensation cost not yet recognized	$ 35.1
Period for recognition	1 year 3 months

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Investments (Investments in Fixed Maturity and Equity Securities Available-for-Sale by Sector) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 24,271,467	$ 21,966,803
Estimated Fair Value	$ 24,449,498	$ 23,210,968
% of Total	100.00%	100.00%
Fixed maturity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 37,751,132	$ 35,281,412
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	1,907,163	2,982,754
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	653,083	113,346
Estimated Fair Value	$ 39,005,212	$ 38,150,820
% of Total	100.00%	100.00%
Other-than-temporary impairments in AOCI	$ 275	$ 275
Equity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		102,841
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax		958
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		3,647
Estimated Fair Value		$ 100,152
% of Total		100.00%
Corporate Debt Securities [Member] | Fixed maturity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	24,271,467	$ 21,966,803
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	594,444	1,299,594
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	416,413	55,429
Estimated Fair Value	$ 24,449,498	$ 23,210,968
% of Total	62.70%	60.90%
Other-than-temporary impairments in AOCI	$ 0	$ 0
Canadian and Canadian provincial governments | Fixed maturity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,902,433	2,843,273
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	1,138,426	1,378,510
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	4,109	1,707
Estimated Fair Value	$ 4,036,750	$ 4,220,076
% of Total	10.30%	11.10%
Other-than-temporary impairments in AOCI	$ 0	$ 0
Residential mortgage-backed securities | Fixed maturity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,816,949	1,695,126
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	14,235	36,632
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	50,422	11,878
Estimated Fair Value	$ 1,780,762	$ 1,719,880
% of Total	4.60%	4.50%
Other-than-temporary impairments in AOCI	$ 0	$ 0
Asset-backed securities | Fixed maturity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,867,650	1,634,758
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	10,312	18,798
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	14,945	5,194
Estimated Fair Value	$ 1,863,017	$ 1,648,362
% of Total	4.80%	4.30%
Other-than-temporary impairments in AOCI	$ 275	$ 275
Commercial Mortgage Backed Securities [Member] | Fixed maturity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,282,015	1,285,594
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	8,403	22,627
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	16,884	4,834
Estimated Fair Value	$ 1,273,534	$ 1,303,387
% of Total	3.30%	3.40%
Other-than-temporary impairments in AOCI	$ 0	$ 0
US Treasury and Government [Member] | Fixed maturity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,500,703	1,953,436
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	6,359	12,089
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	94,653	21,933
Estimated Fair Value	$ 1,412,409	$ 1,943,592
% of Total	3.60%	5.10%
Other-than-temporary impairments in AOCI	$ 0	$ 0
US States and Political Subdivisions Debt Securities [Member] | Fixed maturity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	889,218	647,727
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	36,410	59,997
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	13,637	4,296
Estimated Fair Value	$ 911,991	$ 703,428
% of Total	2.30%	1.80%
Other-than-temporary impairments in AOCI	$ 0	$ 0
Debt Security, Government, Non-US [Member] | Fixed maturity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,220,697	3,254,695
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	98,574	154,507
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	42,020	8,075
Estimated Fair Value	$ 3,277,251	$ 3,401,127
% of Total	8.40%	8.90%
Other-than-temporary impairments in AOCI	$ 0	$ 0
Nonredeemable Preferred Stock [Member] | Equity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		41,553
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax		479
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		2,226
Estimated Fair Value		$ 39,806
% of Total		39.70%
Other equity securities | Equity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		$ 61,288
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax		479
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		1,421
Estimated Fair Value		$ 60,346
% of Total		60.30%

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Investments (Fixed Maturity Securities Pledged And Received As Collateral) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 24,271,467	$ 21,966,803
Available-for-sale Securities	24,449,498	23,210,968
Collateral Fixed Maturity Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	67,899	72,542
Available-for-sale Securities	69,792	75,622
Collateral Received Fixed Maturity Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities	592,146	590,417
Reported Value Measurement [Member]
Debt Securities, Available-for-sale [Line Items]
Assets Held-in-trust	19,263,724	15,584,296
Estimate of Fair Value Measurement [Member]
Debt Securities, Available-for-sale [Line Items]
Assets Held-in-trust	$ 19,670,559	$ 16,715,281

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Investments (Exposure To Concentrations Of Credit Risk) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 24,271,467	$ 21,966,803
Available-for-sale Securities	24,449,498	23,210,968
Canadian Province Of Quebec Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	951,186	939,837
Available-for-sale Securities	1,225,712	1,282,944
Canadian Province Of Ontario Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Amortized Cost Basis	1,158,326	1,119,337
Available-for-sale Securities	$ 1,833,972	$ 1,917,996

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Investments (Amortized Cost and Fair Value of Fixed Maturities by Contractual Maturities) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Available For Sale Securities Debt Maturities Amortized Cost
Due in one year or less	$ 986,289
Due after one year through five years	7,797,732
Due after five year through ten years	9,311,737
Due after ten years	14,688,760
Asset and mortgage-backed securities	4,966,614
Total	37,751,132	$ 35,281,412
Available For Sale Securities Debt Maturities Fair Value
Due in one year or less	993,352
Due after one year through five years	7,888,116
Due after five year through ten years	9,407,186
Due after ten years	15,799,245
Asset and mortgage-backed securities	4,917,313
Total	$ 39,005,212	$ 38,150,820

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Investments (Amortized Cost and Fair Value of Fixed Maturity Holdings by Industry Type) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Corporate Securities by Investment Sector And Credit Rating [Line Items]
Amortized Cost	$ 24,271,467	$ 21,966,803
Estimated Fair Value	$ 24,449,498	$ 23,210,968
% of Total	100.00%	100.00%
Financial Services Sector [Member]
Corporate Securities by Investment Sector And Credit Rating [Line Items]
Amortized Cost	$ 8,561,885	$ 7,977,885
Estimated Fair Value	$ 8,564,254	$ 8,362,774
% of Total	35.10%	36.10%
Commercial and Industrial Sector [Member]
Corporate Securities by Investment Sector And Credit Rating [Line Items]
Amortized Cost	$ 12,632,502	$ 11,535,166
Estimated Fair Value	$ 12,753,024	$ 12,199,333
% of Total	52.10%	52.50%
Utility Sector [Member]
Corporate Securities by Investment Sector And Credit Rating [Line Items]
Amortized Cost	$ 3,077,080	$ 2,453,752
Estimated Fair Value	$ 3,132,220	$ 2,648,861
% of Total	12.80%	11.40%

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Investments (Credit Losses Recognized in Earnings on Fixed Maturity Securities Held by the Company) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of period	$ 3,677	$ 3,677	$ 3,677	$ 6,013
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status	0	0	0	(2,336)
Balance, end of period	$ 3,677	$ 3,677	$ 3,677	$ 3,677

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Investments (Fair Value Below Amortized Cost of Gross Unrealized Losses for Fixed Maturity and Equity Securities) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Gross unrealized losses with number of securities [Line Items]
Gross Unrealized Losses	$ 653,083	$ 116,993
% of Total	100.00%	100.00%
Less than 20%
Gross unrealized losses with number of securities [Line Items]
Gross Unrealized Losses	$ 640,481	$ 113,466
% of Total	98.10%	97.00%
20% or more for less than six months
Gross unrealized losses with number of securities [Line Items]
Gross Unrealized Losses	$ 309	$ 689
% of Total	0.00%	0.60%
20% or more for six months or greater
Gross unrealized losses with number of securities [Line Items]
Gross Unrealized Losses	$ 12,293	$ 2,838
% of Total	1.90%	2.40%

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Investments (Fair Value and Losses by Investment Category and Length of Time in a Loss Position) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	$ 14,519,974	$ 4,565,273
Gross Unrealized Losses - Less than 12 months	410,779	40,239
Estimated Fair Value - 12 months or greater	3,874,370	2,738,393
Gross Unrealized Losses - 12 months or greater	242,304	73,107
Estimated Fair Value	18,394,344	7,303,666
Gross Unrealized Losses	653,083	113,346
Equity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months		5,902
Gross Unrealized Losses - Less than 12 months		1,024
Estimated Fair Value - 12 months or greater		73,722
Gross Unrealized Losses - 12 months or greater		2,623
Estimated Fair Value		79,624
Gross Unrealized Losses		3,647
Non-investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	682,541	225,474
Gross Unrealized Losses - Less than 12 months	30,048	3,450
Estimated Fair Value - 12 months or greater	86,297	93,723
Gross Unrealized Losses - 12 months or greater	7,729	7,559
Estimated Fair Value	768,838	319,197
Gross Unrealized Losses	37,777	11,009
Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	13,837,433	4,339,799
Gross Unrealized Losses - Less than 12 months	380,731	36,789
Estimated Fair Value - 12 months or greater	3,788,073	2,644,670
Gross Unrealized Losses - 12 months or greater	234,575	65,548
Estimated Fair Value	17,625,506	6,984,469
Gross Unrealized Losses	615,306	102,337
Corporate Debt Securities [Member] | Non-investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	539,521	194,879
Gross Unrealized Losses - Less than 12 months	23,955	3,317
Estimated Fair Value - 12 months or greater	77,675	75,731
Gross Unrealized Losses - 12 months or greater	7,296	6,933
Estimated Fair Value	617,196	270,610
Gross Unrealized Losses	31,251	10,250
Corporate Debt Securities [Member] | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	10,117,970	1,886,212
Gross Unrealized Losses - Less than 12 months	303,926	17,099
Estimated Fair Value - 12 months or greater	1,290,804	1,009,750
Gross Unrealized Losses - 12 months or greater	81,236	28,080
Estimated Fair Value	11,408,774	2,895,962
Gross Unrealized Losses	385,162	45,179
Canadian and Canadian provincial governments | Non-investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	2,328	1,995
Gross Unrealized Losses - Less than 12 months	162	20
Estimated Fair Value - 12 months or greater	0	0
Gross Unrealized Losses - 12 months or greater	0	0
Estimated Fair Value	2,328	1,995
Gross Unrealized Losses	162	20
Canadian and Canadian provincial governments | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	58,816	18,688
Gross Unrealized Losses - Less than 12 months	1,211	91
Estimated Fair Value - 12 months or greater	107,167	111,560
Gross Unrealized Losses - 12 months or greater	2,736	1,596
Estimated Fair Value	165,983	130,248
Gross Unrealized Losses	3,947	1,687
Residential mortgage-backed securities | Non-investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	0	0
Gross Unrealized Losses - Less than 12 months	0	0
Estimated Fair Value - 12 months or greater	1,102	1,369
Gross Unrealized Losses - 12 months or greater	20	22
Estimated Fair Value	1,102	1,369
Gross Unrealized Losses	20	22
Residential mortgage-backed securities | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	931,044	566,699
Gross Unrealized Losses - Less than 12 months	23,339	5,852
Estimated Fair Value - 12 months or greater	528,739	224,439
Gross Unrealized Losses - 12 months or greater	27,063	6,004
Estimated Fair Value	1,459,783	791,138
Gross Unrealized Losses	50,402	11,856
Asset-backed securities | Non-investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	0	0
Gross Unrealized Losses - Less than 12 months	0	0
Estimated Fair Value - 12 months or greater	1,110	1,489
Gross Unrealized Losses - 12 months or greater	52	53
Estimated Fair Value	1,110	1,489
Gross Unrealized Losses	52	53
Asset-backed securities | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	680,900	434,274
Gross Unrealized Losses - Less than 12 months	8,650	2,707
Estimated Fair Value - 12 months or greater	262,544	168,524
Gross Unrealized Losses - 12 months or greater	6,243	2,434
Estimated Fair Value	943,444	602,798
Gross Unrealized Losses	14,893	5,141
Commercial mortgage-backed securities | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	555,716	220,401
Gross Unrealized Losses - Less than 12 months	8,304	1,914
Estimated Fair Value - 12 months or greater	207,943	103,269
Gross Unrealized Losses - 12 months or greater	8,580	2,920
Estimated Fair Value	763,659	323,670
Gross Unrealized Losses	16,884	4,834
US Government Agencies Debt Securities [Member] | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	197,114	800,298
Gross Unrealized Losses - Less than 12 months	3,913	6,177
Estimated Fair Value - 12 months or greater	1,002,661	767,197
Gross Unrealized Losses - 12 months or greater	90,740	15,756
Estimated Fair Value	1,199,775	1,567,495
Gross Unrealized Losses	94,653	21,933
US States and Political Subdivisions Debt Securities [Member] | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	261,456	43,510
Gross Unrealized Losses - Less than 12 months	6,722	242
Estimated Fair Value - 12 months or greater	90,649	68,666
Gross Unrealized Losses - 12 months or greater	6,915	4,054
Estimated Fair Value	352,105	112,176
Gross Unrealized Losses	13,637	4,296
Debt Security, Government, Non-US [Member] | Non-investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	140,692	28,600
Gross Unrealized Losses - Less than 12 months	5,931	113
Estimated Fair Value - 12 months or greater	6,410	15,134
Gross Unrealized Losses - 12 months or greater	361	551
Estimated Fair Value	147,102	43,734
Gross Unrealized Losses	6,292	664
Debt Security, Government, Non-US [Member] | Investment grade securities | Fixed maturity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months	1,034,417	369,717
Gross Unrealized Losses - Less than 12 months	24,666	2,707
Estimated Fair Value - 12 months or greater	297,566	191,265
Gross Unrealized Losses - 12 months or greater	11,062	4,704
Estimated Fair Value	1,331,983	560,982
Gross Unrealized Losses	$ 35,728	7,411
Nonredeemable Preferred Stock [Member] | Equity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months		82
Gross Unrealized Losses - Less than 12 months		1
Estimated Fair Value - 12 months or greater		26,471
Gross Unrealized Losses - 12 months or greater		2,225
Estimated Fair Value		26,553
Gross Unrealized Losses		2,226
Other equity securities | Equity securities
Estimated Fair Values And Gross Unrealized Losses, OTTI Impairment Losses Reported In AOCI [Line Items]
Estimated Fair Value - Less than 12 months		5,820
Gross Unrealized Losses - Less than 12 months		1,023
Estimated Fair Value - 12 months or greater		47,251
Gross Unrealized Losses - 12 months or greater		398
Estimated Fair Value		53,071
Gross Unrealized Losses		$ 1,421

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Investments (Investment Income Net of Related Expenses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	$ 596,035	$ 576,317	$ 1,684,151	$ 1,646,934
Investment expense	(23,293)	(19,399)	(67,019)	(57,114)
Investment income, net of related expenses	572,742	556,918	1,617,132	1,589,820
Available-for-sale Securities [Member]
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	378,669	359,157	1,121,496	1,039,392
Equity securities
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	1,319	942	3,710	3,296
Mortgage Loans on Real Estate [Member]
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	54,424	50,040	155,083	138,829
Policy loans
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	14,730	15,404	44,285	45,870
Funds withheld at interest
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	108,232	102,144	270,094	327,089
Short-term Investments [Member]
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	3,067	1,977	9,276	5,266
Other invested assets
Major Categories Of Investment Income Net of Expenses [Line Items]
Investment revenue	$ 35,594	$ 46,653	$ 80,207	$ 87,192

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Investments (Investment Related Gains (Losses) Net) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Investments [Abstract]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	$ 10,705	$ 390	$ 14,055	$ 20,980
Investment Gains And Losses [Abstract]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	0	889	0	889
Gain on investment activity	(20,040)	(19,512)	(52,146)	(91,611)
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments	(37,880)	(7,593)	(94,194)	(26,577)
Available-for-sale Equity Securities, Gross Unrealized Gain	3,932	10	4,429	24
Available-for-sale Equity Securities, Gross Unrealized Loss	(174)	(85)	(1,124)	(4,135)
Gain (Loss) on Sale of Equity Investments	3,539	0	(7,564)	0
Other impairment losses and change in mortgage loan provision	(6,566)	(2,446)	(8,235)	(9,220)
Derivatives and other, net	7,797	14,534	37,538	109,637
Total investment related gains (losses), net	$ (20,017)	$ 22,653	$ (31,059)	$ 139,471

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Investments (Borrowed Securities Repurchased Securities And Repurchased Reversed Repurchased Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Securities Loaned, Fair Value of Collateral	$ 102,489	$ 121,551
Securities Received as Collateral	112,000	128,000
Securities for Reverse Repurchase Agreements	408,679	413,819
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	400,515	417,550
Reported Value Measurement [Member]
Debt Securities, Available-for-sale [Line Items]
Securities Borrowed	353,650	358,875
Securities Loaned, Fair Value of Collateral	101,965	117,246
Estimate of Fair Value Measurement [Member]
Debt Securities, Available-for-sale [Line Items]
Securities Borrowed	370,323	377,820
Securities for Reverse Repurchase Agreements	$ 404,905	$ 428,344

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Investments (Securities Pledged as Collateral Related to Repurchase Reverse Repurchase Program) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Fair Value of Collateral	$ 102,489	$ 121,551
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	404,905	428,344
Obligation to Return Securities Received as Collateral	507,394	549,895
Securities Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	541,411	576,786
SecuredBorrowingsGrossDifferenceAmount	34,017	26,891
Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0	1,131
Obligation to Return Securities Received as Collateral	0	1,131
Maturity up to 30 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0	0
Obligation to Return Securities Received as Collateral	0	0
Maturity 30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0	312
Obligation to Return Securities Received as Collateral	0	312
Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	404,905	426,901
Obligation to Return Securities Received as Collateral	507,394	548,452
Corporate Debt Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Fair Value of Collateral	102,489	121,551
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	132,228	184,646
Corporate Debt Securities [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Fair Value of Collateral	0	0
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0	0
Corporate Debt Securities [Member] | Maturity up to 30 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Fair Value of Collateral	0	0
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0	0
Corporate Debt Securities [Member] | Maturity 30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Fair Value of Collateral	0	0
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0	312
Corporate Debt Securities [Member] | Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities Loaned, Fair Value of Collateral	102,489	121,551
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	132,228	184,334
US Government Agencies Debt Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement		220,765
US Government Agencies Debt Securities [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement		0
US Government Agencies Debt Securities [Member] | Maturity up to 30 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement		0
US Government Agencies Debt Securities [Member] | Maturity 30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement		0
US Government Agencies Debt Securities [Member] | Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement		220,765
US Treasury and Government [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	219,906
US Treasury and Government [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0
US Treasury and Government [Member] | Maturity up to 30 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0
US Treasury and Government [Member] | Maturity 30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0
US Treasury and Government [Member] | Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	219,906
Debt Security, Government, Non-US [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	52,771	21,802
Debt Security, Government, Non-US [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0	0
Debt Security, Government, Non-US [Member] | Maturity up to 30 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0	0
Debt Security, Government, Non-US [Member] | Maturity 30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0	0
Debt Security, Government, Non-US [Member] | Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	52,771	21,802
Other Debt Obligations [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0	1,131
Other Debt Obligations [Member] | Maturity Overnight [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0	1,131
Other Debt Obligations [Member] | Maturity up to 30 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0	0
Other Debt Obligations [Member] | Maturity 30 to 90 Days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	0	0
Other Debt Obligations [Member] | Maturity over 90 days [Member]
Assets Sold under Agreements to Repurchase [Line Items]
FinancialAssetsSoldUnderAgreementsToRepurchaseGrossIncludingNotSubjectToMasterNettingArrangement	$ 0	$ 0

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Investments (Mortgage Loans by Property Type) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Recorded investment	$ 4,794,226		$ 4,413,171
Percentage of total	100.00%		100.00%
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	$ (4,786)		$ (3,254)
Allowance for Loan and Lease Losses, Real Estate	(10,366)	$ (9,706)	(9,384)	$ (9,137)	$ (8,156)	$ (7,685)
Mortgage loans on real estate (net of allowances of $10,366 and $9,384)	4,779,074		4,400,533
Apartment
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Recorded investment	$ 543,917		$ 510,052
Percentage of total	11.30%		11.60%
Retail
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Recorded investment	$ 1,365,157		$ 1,270,676
Percentage of total	28.50%		28.80%
Office building
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Recorded investment	$ 1,633,887		$ 1,487,392
Percentage of total	34.10%		33.60%
Industrial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Recorded investment	$ 983,553		$ 938,612
Percentage of total	20.50%		21.30%
Other commercial
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Recorded investment	$ 267,712		$ 206,439
Percentage of total	5.60%		4.70%

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Investments (Mortgage Loans by Maturity Date) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 4,794,226	$ 4,413,171
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	100.00%	100.00%
Due within five years
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 1,216,241	$ 1,091,066
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	25.40%	24.80%
Due after five years through ten years
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 2,738,400	$ 2,516,872
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	57.10%	57.00%
Due after ten years
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 839,585	$ 805,233
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	17.50%	18.20%

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Investments (Mortgage Loans by Credit Quality Indicator) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 4,794,226	$ 4,413,171
Loans Receivable, Gross, Commercial, Construction	$ 25,724	$ 9,686
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	100.00%	100.00%
LTV 0 to 59 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 2,279,405	$ 2,206,208
Loans Receivable, Gross, Commercial, Construction	$ 25,724	$ 0
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	47.60%	50.00%
LTV 60 To 69 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 1,846,868	$ 1,608,078
Loans Receivable, Gross, Commercial, Construction	$ 0	$ 0
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	38.50%	36.40%
LTV 70 To 79 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 533,075	$ 431,274
Loans Receivable, Gross, Commercial, Construction	$ 0	$ 0
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	11.10%	9.80%
LTV 80 to 100 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 134,878	$ 167,611
Loans Receivable, Gross, Commercial, Construction	$ 0	$ 9,686
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	2.80%	3.80%
Debt Service Coverage Ratio Range One [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 4,307,296	$ 4,182,753
Debt Service Coverage Ratio Range One [Member] | LTV 0 to 59 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	2,146,401	2,148,428
Debt Service Coverage Ratio Range One [Member] | LTV 60 To 69 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	1,666,525	1,517,029
Debt Service Coverage Ratio Range One [Member] | LTV 70 To 79 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	386,137	396,446
Debt Service Coverage Ratio Range One [Member] | LTV 80 to 100 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	108,233	120,850
Debt Service Coverage Ratio Range Two [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	274,833	151,281
Debt Service Coverage Ratio Range Two [Member] | LTV 0 to 59 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	63,794	53,979
Debt Service Coverage Ratio Range Two [Member] | LTV 60 To 69 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	117,726	47,128
Debt Service Coverage Ratio Range Two [Member] | LTV 70 To 79 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	70,884	19,461
Debt Service Coverage Ratio Range Two [Member] | LTV 80 to 100 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	22,429	30,713
Debt Service Coverage Ratio Range Three [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	186,373	69,451
Debt Service Coverage Ratio Range Three [Member] | LTV 0 to 59 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	43,486	3,801
Debt Service Coverage Ratio Range Three [Member] | LTV 60 To 69 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	62,617	43,921
Debt Service Coverage Ratio Range Three [Member] | LTV 70 To 79 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	76,054	15,367
Debt Service Coverage Ratio Range Three [Member] | LTV 80 to 100 Percent [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 4,216	$ 6,362

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Investments (Age Analysis of Past Due Recorded Investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 0	$ 19,156
Financing Receivable, Recorded Investment, Current	4,794,226	4,394,015
Loans Receivable, Gross, Commercial, Real Estate	4,794,226	4,413,171
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	17,100
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 0	$ 2,056

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Investments (Mortgage Loans by Method of Evaluation and Related Valuation Allowances) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Mortgage Loans:
Total mortgage loans	$ 4,794,226	$ 4,413,171
Mortgage Loans on Real Estate, Commercial and Consumer, Net, (Investment Based Operations Presentation) [Abstract]
Mortgage loans on real estate (net of valuation allowances)	4,779,074	4,400,533
Commercial Real Estate Portfolio Segment [Member]
Mortgage Loans:
Evaluated individually for credit losses	30,629	5,858
Evaluated collectively for credit losses	4,763,597	4,407,313
Total mortgage loans	4,794,226	4,413,171
Valuation Allowances:
Specific for credit losses	0	0
Non-specifically identified credit losses	10,366	9,384
Total valuation allowances	$ 10,366	$ 9,384

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Investments (Loan Valuation Allowance for Mortgage Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Allowance For Loan And Lease Losses Roll Forward
Balance, Beginning of Period	$ 9,706	$ 8,156	$ 9,384	$ 7,685
Provision (release)	656	977	986	1,444
Allowance for Loan and Lease Losses, Foreign Currency Translation	4	4	(4)	8
Balance, End of Period	$ 10,366	$ 9,137	$ 10,366	$ 9,137

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Investments (Impaired Mortgage Loans) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance		$ 30,660		$ 30,660		$ 6,427
Recorded Investment		30,629		30,629		5,858
Related Allowance		0		0		0
Carrying Value		30,629		30,629		5,858
Average Investment	[1]	30,641	$ 3,967	22,641	$ 3,062
Interest Income		346	33	650	100
Impaired mortgage loans with valuation allowance recorded
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance		0		0		0
Recorded Investment		0		0		0
Related Allowance		0		0		0
Carrying Value		0		0		0
Average Investment	[1]	0	0	0	0
Interest Income		0	0	0	0
Impaired mortgage loans with no valuation allowance recorded
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance		30,660		30,660		6,427
Recorded Investment		30,629		30,629		5,858
Related Allowance		0		0		0
Carrying Value		30,629		30,629		$ 5,858
Average Investment	[1]	30,641	3,967	22,641	3,062
Interest Income		$ 346	$ 33	$ 650	$ 100

[1] Average recorded investment represents the average loan balances as of the beginning of period and all subsequent quarterly end of period balances.

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Investments (Other Invested Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Other invested assets	$ 1,706,979	$ 1,505,332
Equity Release Mortgages [Member]
Other invested assets	383,450	219,940
Limited Partner [Member]
Other invested assets	924,006	781,124
Derivatives
Other invested assets	101,124	137,613
Fair Value Option Contractholder Directed Unit Linked Investments [Member]
Other invested assets	212,315	218,541
Other
Other invested assets	$ 86,084	$ 148,114

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Investments (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) securities	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) securities	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) securities
Investment Narrative [Line Items]
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash	$ 28,900		$ 28,900		$ 31,200
Net Amount Assets Liabilities From Repurchase Reverse Repurchase Agreements	400		400		$ 1,100
Proceeds From Sale Of Available For Sale Securities Sold At Loss	1,345,300	$ 479,700	3,783,300	$ 1,604,700
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments	$ 37,880	7,593	$ 94,194	26,577
Policy Loans Percent Of Total Investments	2.50%		2.50%		2.60%
Mortgage Loan Percent Of Cash And Invested Assets	9.00%		9.00%		8.50%
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities	2,866		2,866		1,116
Securities As Percentage Of Consolidated Stockholder Equity	10.00%		10.00%
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	100.00%		100.00%		100.00%
Funds Withheld At Interest Percent Of Total Investments	11.30%		11.30%		11.80%
Funds withheld at interest	$ 5,976,301		$ 5,976,301		$ 6,083,388
Funds Held Under Reinsurance Agreements Asset Specific Client	$ 3,900,000		$ 3,900,000
Other Invested Assets Percent Of Cash And Invested Assets	3.20%		3.20%		2.90%
ProceedsFromSaleOfAvailableForSaleEquitySecuritiesSoldAtLoss	$ 3,100	5,000	$ 31,500	166,700
Available-for-sale Equity Securities, Gross Unrealized Loss	$ 174	$ 85	$ 1,124	$ 4,135
CALIFORNIA
Investment Narrative [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	18.80%		18.80%
TEXAS
Investment Narrative [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	10.00%		10.00%
GEORGIA
Investment Narrative [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	7.50%		7.50%
CANADA
Investment Narrative [Line Items]
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total	2.60%		2.60%

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Derivative Instruments (Gross Notional Amount and Fair Value of Derivatives Contracts) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional Amount	$ 17,380,622	$ 15,904,127
Carrying Value / Fair Value of Assets	307,303	320,724
Derivative Liability, Fair Value, Gross Liability	937,691	1,058,727
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional Amount	15,574,135	14,243,031
Carrying Value / Fair Value of Assets	252,115	254,252
Derivative Liability, Fair Value, Gross Liability	911,275	1,022,122
Not Designated as Hedging Instrument | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount	1,074,173	996,204
Carrying Value / Fair Value of Assets	37,238	59,809
Derivative Liability, Fair Value, Gross Liability	1,818	2,372
Not Designated as Hedging Instrument | Financial Futures
Derivative [Line Items]
Notional Amount	347,916	412,438
Carrying Value / Fair Value of Assets	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Not Designated as Hedging Instrument | Foreign Currency Forwards
Derivative [Line Items]
Notional Amount	0	6,030
Carrying Value / Fair Value of Assets	0	0
Derivative Liability, Fair Value, Gross Liability	0	28
Not Designated as Hedging Instrument | Consumer Price Index Swap [Member]
Derivative [Line Items]
Notional Amount	409,023	221,932
Carrying Value / Fair Value of Assets	127	0
Derivative Liability, Fair Value, Gross Liability	2,836	2,160
Not Designated as Hedging Instrument | Credit Default Swaps
Derivative [Line Items]
Notional Amount	1,373,300	961,200
Carrying Value / Fair Value of Assets	6,759	8,319
Derivative Liability, Fair Value, Gross Liability	114	1,651
Not Designated as Hedging Instrument | Equity Options
Derivative [Line Items]
Notional Amount	571,845	632,251
Carrying Value / Fair Value of Assets	19,372	23,271
Derivative Liability, Fair Value, Gross Liability	0	0
Not Designated as Hedging Instrument | Longevity Swap [Member]
Derivative [Line Items]
Notional Amount	928,320	960,400
Carrying Value / Fair Value of Assets	46,090	40,659
Derivative Liability, Fair Value, Gross Liability	0	0
Not Designated as Hedging Instrument | Mortality Swap [Member]
Derivative [Line Items]
Notional Amount	25,000	0
Carrying Value / Fair Value of Assets	0	0
Derivative Liability, Fair Value, Gross Liability	308	1,683
Not Designated as Hedging Instrument | Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements
Derivative [Line Items]
Notional Amount	0	0
Carrying Value / Fair Value of Assets	142,529	122,194
Derivative Liability, Fair Value, Gross Liability	0	0
Not Designated as Hedging Instrument | Embedded Derivatives In Indexed Annuity [Member]
Derivative [Line Items]
Notional Amount	0	0
Carrying Value / Fair Value of Assets	0	0
Derivative Liability, Fair Value, Gross Liability	815,970	861,758
Not Designated as Hedging Instrument | Embedded Derivatives In Variable Annuity [Member]
Derivative [Line Items]
Notional Amount	0	0
Carrying Value / Fair Value of Assets	0	0
Derivative Liability, Fair Value, Gross Liability	90,229	152,470
Not Designated as Hedging Instrument | Synthetic Guaranteed Investment Contracts
Derivative [Line Items]
Notional Amount	10,844,558	10,052,576
Carrying Value / Fair Value of Assets	0	0
Derivative Liability, Fair Value, Gross Liability	0	0
Designated As Hedging Instrument
Derivative [Line Items]
Notional Amount	1,806,487	1,661,096
Carrying Value / Fair Value of Assets	55,188	66,472
Derivative Liability, Fair Value, Gross Liability	26,416	36,605
Designated As Hedging Instrument | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount	435,000	435,000
Carrying Value / Fair Value of Assets	99	0
Derivative Liability, Fair Value, Gross Liability	20,579	20,389
Designated As Hedging Instrument | Foreign Currency Forwards
Derivative [Line Items]
Notional Amount	834,238	553,175
Carrying Value / Fair Value of Assets	8,948	1,265
Derivative Liability, Fair Value, Gross Liability	2,067	7,720
Designated As Hedging Instrument | Currency Swap [Member]
Derivative [Line Items]
Notional Amount	537,249	672,921
Carrying Value / Fair Value of Assets	46,141	65,207
Derivative Liability, Fair Value, Gross Liability	$ 3,770	$ 8,496

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Derivative Instruments (Derivative Instruments Offsetting Balance Sheet) (Details) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Derivative Assets [Abstract]
Derivative Fair Value Of Free Standing Derivative Asset		$ 164,774	$ 198,530
Gross Amounts Offset in the Balance Sheet		(17,560)	(20,258)
Net Amounts Presented in the Balance Sheet		147,214	178,272
Derivative Asset, Fair Value of Collateral	[1]	0	(862)
Gross Amounts Not Offset in the Balance Sheet - Cash Collateral Pledged/Received	[2]	(159,194)	(185,900)
Net Amount		(11,980)	(8,490)
Derivative Liabilities [Abstract]
Derivative Fair Value Of Free Standing Derivative Liability		31,492	44,499
Gross Amounts Offset in the Balance Sheet		(17,560)	(20,258)
Net Amounts Presented in the Balance Sheet		13,932	24,241
Gross Amounts Not Offset in the Balance Sheet - Financial Instruments	[3]	(61,293)	(58,156)
Gross Amounts Not Offset in the Balance Sheet - Cash Collateral Pledged/Received	[4]	(13,400)	(22,221)
Net Amount		$ (60,761)	$ (56,136)

[1] Consists of U.S. Treasury and government securities.

[2] Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities.

[3] Included in available-for-sale securities, primarily consists of U.S. Treasury and government agency securities.

[4] Consists of receivable from counterparty, included in other assets.

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Derivative Instruments Derivative Instruments (Fair Value Hedge Attributable to Foreign Currency) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	$ (2,258)	$ 2,100	$ (5,284)	$ 9,541
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	$ 2,832	$ (2,100)	$ 9,666	$ (9,541)

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Derivative Instruments (Current Period Cash Flow Hedges in AOCI (loss) before Taxes) (Details) - Cash Flow Hedging [Member] - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ (29,043)	$ (347)	$ (22,656)	$ (7,690)	$ (29,043)	$ (347)	$ (2,619)	$ 2,496
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	6,671	(6,889)			26,586	3,689
Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(50)	(271)			(270)	(704)
Gain (Loss) on Investments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	(183)			0	(142)
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ (234)	$ 0			$ 108	$ 0

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Derivative Instruments (Cash Flow Hedges) (Details) - Cash Flow Hedging [Member] - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ 6,671	$ (6,889)			$ 26,586	$ 3,689
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	29,043	347	$ 22,656	$ 7,690	29,043	347	$ 2,619	$ (2,496)
Gain (Loss) on Investments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	183			0	142
Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	50	271			270	704
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	234	0			(108)	0
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	7,490	(8,421)			27,217	(6,205)
Interest Rate Swap [Member] | Gain (Loss) on Investments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0			0	0
Interest Rate Swap [Member] | Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0			0	0
Interest Rate Swap [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	234	0			(108)	0
Currency Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(819)	1,544			(631)	9,894
Currency Swap [Member] | Gain (Loss) on Investments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0			0	0
Currency Swap [Member] | Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	50	230			270	560
Currency Swap [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 0	0			$ 0	0
Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		(12)				0
Forward Contracts [Member] | Gain (Loss) on Investments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		183				142
Forward Contracts [Member] | Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		41				144
Forward Contracts [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		$ 0				$ 0

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Derivative Instruments (Hedges of Net Investments in Foreign Operations) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivatives, Fair Value [Line Items]
Net Derivatives Gains (Losses) Deferred in AOCI	[1],[2]	$ (17,439)	$ (30,571)	$ 22,862	$ (51,938)
Currency Swap [Member]
Derivatives, Fair Value [Line Items]
Net Derivatives Gains (Losses) Deferred in AOCI	[1],[2]	(5,877)	(35,198)	11,125	(60,723)
Foreign Exchange Forward [Member]
Derivatives, Fair Value [Line Items]
Net Derivatives Gains (Losses) Deferred in AOCI	[1],[2]	$ (11,562)	$ 4,627	$ 11,737	$ 8,785

[1] There was no ineffectiveness recognized for the Company’s hedges of net investments in foreign operations.

[2] There were no sales or substantial liquidations of net investments in foreign operations that would have required the reclassification of gains or losses from accumulated other comprehensive income (loss) into investment income during the periods presented.

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Derivative Instruments (Non Hedging Derivatives and Embedded Derivatives Effect on Income Statement) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	$ (20,017)	$ 22,653	$ (31,059)	$ 139,471
Policy acquisition costs and other insurance expenses	(310,639)	(365,424)	(987,817)	(1,064,645)
Interest credited	143,292	126,099	333,068	349,068
Other revenues	112,764	75,942	272,020	218,091
Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives	(25,258)	(8,961)	(58,883)	(28,125)
Not Designated as Hedging Instrument
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(20,553)	(5,255)	30,217	59,757
Not Designated as Hedging Instrument | Interest Rate Swap [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(12,228)	641	(47,399)	12,318
Not Designated as Hedging Instrument | Financial Futures
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(6,544)	(8,890)	(7,312)	(28,107)
Not Designated as Hedging Instrument | Foreign Currency Forwards
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(58)	24	3	577
Not Designated as Hedging Instrument | Consumer Price Index Swap [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(4,223)	220	(996)	211
Not Designated as Hedging Instrument | Credit Default Swaps
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	4,689	4,137	5,371	15,374
Not Designated as Hedging Instrument | Equity Options
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(9,793)	(8,295)	(15,207)	(34,757)
Not Designated as Hedging Instrument | Longevity Swap [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Other revenues	2,426	3,334	6,983	7,180
Not Designated as Hedging Instrument | Mortality Swap [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Other revenues	473	(132)	(326)	(921)
Not Designated as Hedging Instrument | Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	(2,081)	23,044	20,335	106,854
Not Designated as Hedging Instrument | Embedded Derivatives In Indexed Annuity [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Interest credited	(25,347)	13,133	6,523	35,490
Not Designated as Hedging Instrument | Embedded Derivatives In Variable Annuity [Member]
Income Affect Of Non Hedging Derivatives [Line Items]
Total investment related gains (losses), net	$ 32,133	$ (6,205)	$ 62,242	$ 16,518

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Derivative Instruments (Exposure from Credit Derivatives by Rating of the Underlying Credits) (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2018	Dec. 31, 2017
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ 6,642	$ 7,572
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 1,153,300	$ 951,300
Derivative Average Remaining Maturity	[1],[3]	3 years	3 years 5 months
Standard Poors AAA To A Minus Ratings [Member] | Single Name Credit Default Swaps [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ 2,470	$ 3,128
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 152,000	$ 162,000
Derivative Average Remaining Maturity	[1],[3]	2 years 6 months	2 years 11 months
Standard Poors AAA To A Minus Ratings [Member] | Credit Default Subtotal [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ 2,470	$ 3,128
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 152,000	$ 162,000
Derivative Average Remaining Maturity	[1],[3]	2 years 6 months	2 years 11 months
Standard Poors BBB Rating [Member] | Single Name Credit Default Swaps [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ 4,220	$ 4,469
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 343,700	$ 361,700
Derivative Average Remaining Maturity	[1],[3]	2 years 5 months	2 years 11 months
Standard Poors BBB Rating [Member] | Credit Default Swaps Referencing Indices [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ (80)	$ (55)
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 642,600	$ 422,600
Derivative Average Remaining Maturity	[1],[3]	3 years 5 months	4 years
Standard Poors BBB Rating [Member] | Credit Default Subtotal [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ 4,140	$ 4,414
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 986,300	$ 784,300
Derivative Average Remaining Maturity	[1],[3]	3 years 1 month	3 years 6 months
Standard & Poor's, BB Rating [Member]
Credit Derivatives [Line Items]
Derivative Average Remaining Maturity	[1],[2]	1 year	1 year 6 months
Standard & Poor's, BB Rating [Member] | Single Name Credit Default Swaps [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	$ 32	$ 30
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	15,000	5,000
Standard & Poor's, BB Rating [Member] | Credit Default Subtotal [Member]
Credit Derivatives [Line Items]
Credit Derivative Current Fair Value	[1]	32	30
Maximum Potential Future Exposure on Credit Risk Derivatives	[1],[2]	$ 15,000	$ 5,000

[1] The rating agency designations are based on ratings from Standard and Poor’s (“S&P”).

[2] Assumes the value of the referenced credit obligations is zero.

[3] The weighted average years to maturity of the credit default swaps is calculated based on weighted average notional amounts.

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Derivative Instruments (Changes in Estimated Fair Value Related to Embedded Derivatives) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Changes In Estimated Fair Value Related To Embedded Derivatives [Line Items]
Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives	$ (25,258)	$ (8,961)	$ (58,883)	$ (28,125)
Embedded Derivatives In Modified Coinsurance Or Funds Withheld Arrangements
Changes In Estimated Fair Value Related To Embedded Derivatives [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(2,081)	23,044	20,335	106,854
Derivative, Gain (Loss) on Derivative, Net	(1,320)	7,515	11,517	36,300
Embedded Derivatives In Equity Indexed Annuities [Member]
Changes In Estimated Fair Value Related To Embedded Derivatives [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	(25,347)	(13,133)	6,523	(35,490)
Derivative, Gain (Loss) on Derivative, Net	(17,311)	(9,737)	(6,808)	(38,059)
Embedded Derivatives In Variable Annuity Contracts [Member]
Changes In Estimated Fair Value Related To Embedded Derivatives [Line Items]
Gain (Loss) on Derivative Instruments, Net, Pretax	32,133	(6,205)	62,242	16,518
Derivative, Gain (Loss) on Derivative, Net	$ 9,463	$ (1,074)	$ 33,061	$ 30,785

XML

Derivative Instruments (Credit Exposure of Derivative Contracts) (Details) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Credit Exposure of Derivative Contracts
Estimated fair value of derivatives in net asset (liability) position		$ 133,590	$ 155,714
Derivative, Collateral, Right to Reclaim Cash	[1]	13,400	22,221
Derivative Liability, Fair Value of Collateral	[2]	61,293	58,156
Derivative, Collateral, Obligation to Return Cash	[3]	(159,194)	(185,900)
Derivative Asset, Fair Value of Collateral	[4]	0	(862)
Deposits with Clearing Organizations and Others, Securities	[2]	(61,293)	(58,156)
Net credit exposure		(12,204)	(8,827)
Margin account related to exchange-traded futures	[5]	$ 8,348	$ 6,538

[1] Consists of receivable from counterparty, included in other assets.

[2] Included in available-for-sale securities, primarily consists of U.S. Treasury and government agency securities.

[3] Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities.

[4] Consists of U.S. Treasury and government securities.

[5] Included in other assets.

XML

Derivative Instruments (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Cumulative Foreign Currency Translation Gain Loss Recorded In Accumulated Other Comprehensive Income Loss For Terminated Net Investment In Foreign Operations Hedges	$ 136.5	$ 113.7
Investment Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	0.2
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ 1.9

XML

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Balances of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	$ 39,005,212	$ 38,150,820
Non Redeemable Preferred Stock Equity Method Investments Fair Value Disclosure		39,806
Equity Method Investments, Fair Value Disclosure	101,069	60,346
Funds withheld at interest embedded derivatives	142,529	122,194
Cash and cash equivalents	657,280	356,788
Short-term investments	186,051	50,746
Investments, Fair Value Disclosure	313,439	356,154
Other Assets, Fair Value Disclosure	46,090	40,659
Assets, Fair Value Disclosure	40,451,670	39,177,513
Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives	906,199	1,014,228
Liabilities Fair Value Disclosure
Financial Liabilities Fair Value Disclosure	920,131	1,038,469
Interest Rate Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	29,106	51,359
Liabilities Fair Value Disclosure
Other liabilities	(14,166)	(14,311)
Foreign Currency Forwards
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	6,881	730
Liabilities Fair Value Disclosure
Other liabilities		(7,213)
Consumer Price Index Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	(13)	(221)
Liabilities Fair Value Disclosure
Other liabilities	(2,696)	(1,939)
Fair Value Option Contractholder Directed Unit Linked Investments [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	212,315	218,541
Credit Default Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	5,961	5,908
Liabilities Fair Value Disclosure
Other liabilities	(684)	(760)
Equity Option [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	16,818	16,932
Liabilities Fair Value Disclosure
Other liabilities	(2,554)	(6,339)
Currency Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	42,371	62,905
Liabilities Fair Value Disclosure
Other liabilities		(6,194)
Mortality Swap [Member]
Liabilities Fair Value Disclosure
Other liabilities	(308)	(1,683)
Corporate Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	24,449,498	23,210,968
Canadian and Canadian provincial governments
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	4,036,750	4,220,076
Residential mortgage-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,780,762	1,719,880
Asset-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,863,017	1,648,362
Assets, Fair Value Disclosure	64,475	0
Commercial Mortgage Backed Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,273,534	1,303,387
US Treasury and Government [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,412,409	1,943,592
US States and Political Subdivisions Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	911,991	703,428
Debt Security, Government, Non-US [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	3,277,251	3,401,127
Fair Value Inputs Level 1 Member
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,284,932	1,818,006
Non Redeemable Preferred Stock Equity Method Investments Fair Value Disclosure		39,806
Equity Method Investments, Fair Value Disclosure	57,584	60,346
Funds withheld at interest embedded derivatives	0	0
Cash and cash equivalents	657,280	354,071
Short-term investments	5,957	0
Investments, Fair Value Disclosure	211,253	217,618
Other Assets, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	2,217,006	2,489,847
Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives	0	0
Liabilities Fair Value Disclosure
Financial Liabilities Fair Value Disclosure	0	0
Fair Value Inputs Level 1 Member | Interest Rate Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 1 Member | Foreign Currency Forwards
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities		0
Fair Value Inputs Level 1 Member | Consumer Price Index Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 1 Member | Fair Value Option Contractholder Directed Unit Linked Investments [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	211,253	217,618
Fair Value Inputs Level 1 Member | Credit Default Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 1 Member | Equity Option [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 1 Member | Currency Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities		0
Fair Value Inputs Level 1 Member | Mortality Swap [Member]
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 1 Member | Corporate Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | Canadian and Canadian provincial governments
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | Residential mortgage-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | Asset-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | Commercial Mortgage Backed Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | US Treasury and Government [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,284,932	1,818,006
Fair Value Inputs Level 1 Member | US States and Political Subdivisions Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 1 Member | Debt Security, Government, Non-US [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	0
Fair Value Inputs Level 2 Member
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	35,792,145	34,098,204
Non Redeemable Preferred Stock Equity Method Investments Fair Value Disclosure		0
Equity Method Investments, Fair Value Disclosure	0	0
Funds withheld at interest embedded derivatives	0	0
Cash and cash equivalents	0	2,717
Short-term investments	177,891	47,650
Investments, Fair Value Disclosure	102,186	138,536
Other Assets, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	36,072,222	34,287,107
Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives	0	0
Liabilities Fair Value Disclosure
Financial Liabilities Fair Value Disclosure	13,624	22,558
Fair Value Inputs Level 2 Member | Interest Rate Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	29,106	51,359
Liabilities Fair Value Disclosure
Other liabilities	(14,166)	(14,311)
Fair Value Inputs Level 2 Member | Foreign Currency Forwards
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	6,881	730
Liabilities Fair Value Disclosure
Other liabilities		(7,213)
Fair Value Inputs Level 2 Member | Consumer Price Index Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	(13)	(221)
Liabilities Fair Value Disclosure
Other liabilities	(2,696)	(1,939)
Fair Value Inputs Level 2 Member | Fair Value Option Contractholder Directed Unit Linked Investments [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	1,062	923
Fair Value Inputs Level 2 Member | Credit Default Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	5,961	5,908
Liabilities Fair Value Disclosure
Other liabilities	(684)	(760)
Fair Value Inputs Level 2 Member | Equity Option [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	16,818	16,932
Liabilities Fair Value Disclosure
Other liabilities	(2,554)	(6,339)
Fair Value Inputs Level 2 Member | Currency Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	42,371	62,905
Liabilities Fair Value Disclosure
Other liabilities		(6,194)
Fair Value Inputs Level 2 Member | Mortality Swap [Member]
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 2 Member | Corporate Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	23,193,563	21,873,696
Fair Value Inputs Level 2 Member | Canadian and Canadian provincial governments
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	3,488,008	3,626,134
Fair Value Inputs Level 2 Member | Residential mortgage-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,780,762	1,611,998
Fair Value Inputs Level 2 Member | Asset-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,780,250	1,524,888
Fair Value Inputs Level 2 Member | Commercial Mortgage Backed Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,271,752	1,300,153
Fair Value Inputs Level 2 Member | US Treasury and Government [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	107,225	103,075
Fair Value Inputs Level 2 Member | US States and Political Subdivisions Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	898,346	662,225
Fair Value Inputs Level 2 Member | Debt Security, Government, Non-US [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	3,272,239	3,396,035
Fair Value Inputs Level 3 Member
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,928,135	2,234,610
Non Redeemable Preferred Stock Equity Method Investments Fair Value Disclosure		0
Equity Method Investments, Fair Value Disclosure	43,485	0
Funds withheld at interest embedded derivatives	142,529	122,194
Cash and cash equivalents	0	0
Short-term investments	2,203	3,096
Investments, Fair Value Disclosure	0	0
Other Assets, Fair Value Disclosure	46,090	40,659
Assets, Fair Value Disclosure	2,162,442	2,400,559
Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives	906,199	1,014,228
Liabilities Fair Value Disclosure
Financial Liabilities Fair Value Disclosure	906,507	1,015,911
Fair Value Inputs Level 3 Member | Interest Rate Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 3 Member | Foreign Currency Forwards
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities		0
Fair Value Inputs Level 3 Member | Consumer Price Index Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 3 Member | Fair Value Option Contractholder Directed Unit Linked Investments [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Fair Value Inputs Level 3 Member | Credit Default Swaps
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 3 Member | Equity Option [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities	0	0
Fair Value Inputs Level 3 Member | Currency Swap [Member]
Assets Fair Value Disclosure
Investments, Fair Value Disclosure	0	0
Liabilities Fair Value Disclosure
Other liabilities		0
Fair Value Inputs Level 3 Member | Mortality Swap [Member]
Liabilities Fair Value Disclosure
Other liabilities	(308)	(1,683)
Fair Value Inputs Level 3 Member | Corporate Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,255,935	1,337,272
Fair Value Inputs Level 3 Member | Canadian and Canadian provincial governments
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	548,742	593,942
Fair Value Inputs Level 3 Member | Residential mortgage-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	0	107,882
Fair Value Inputs Level 3 Member | Asset-backed securities
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	82,767	123,474
Fair Value Inputs Level 3 Member | Commercial Mortgage Backed Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	1,782	3,234
Fair Value Inputs Level 3 Member | US Treasury and Government [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	20,252	22,511
Fair Value Inputs Level 3 Member | US States and Political Subdivisions Debt Securities [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	13,645	41,203
Fair Value Inputs Level 3 Member | Debt Security, Government, Non-US [Member]
Assets Fair Value Disclosure
Fixed maturity securities, available-for-sale	$ 5,012	$ 5,092

XML

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Fair Value Assets Transfers between Level 1 and Level 2) (Details) - Corporate Debt Securities [Member] $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	$ 0	$ 0
Fair Value, Assets, Level 2 to Level 1 Transfers, Description	0	88674

XML

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Quantitative Information for Level 3 Inputs) (Details) $ in Thousands	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 40,451,670	$ 39,177,513
Corporate Debt Securities [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 630,328	$ 173,579
Corporate Debt Securities [Member] | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.01
Corporate Debt Securities [Member] | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.05	0.02
Corporate Debt Securities [Member] | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.00	0.00
Asset-backed securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 64,475	$ 0
Asset-backed securities | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.00
Asset-backed securities | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.00
Asset-backed securities | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.00	0.00
Longevity Swap [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 46,090	$ 40,659
US Government Agencies Debt Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 20,252	$ 22,511
US Government Agencies Debt Securities [Member] | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.01
US Government Agencies Debt Securities [Member] | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.01
US Government Agencies Debt Securities [Member] | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.00	0.00
US States and Political Subdivisions Debt Securities [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 0	$ 4,616
US States and Political Subdivisions Debt Securities [Member] | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.00	0.01
US States and Political Subdivisions Debt Securities [Member] | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.00	0.01
US States and Political Subdivisions Debt Securities [Member] | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.00	0.01
Debt Security, Corporate, Non-US [Member] | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.00
Debt Security, Corporate, Non-US [Member] | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.00
Debt Security, Corporate, Non-US [Member] | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.00
Foreign Government Debt [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 5,012	$ 0
Equity securities | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 33,074	$ 0
Equity securities | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Securities, FV-NI, Measurement Input	0.04	0.00
Equity securities | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Securities, FV-NI, Measurement Input	0.04	0.00
Equity securities | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Securities, FV-NI, Measurement Input	0.04	0.00
Funds Withheld At Interest Embedded Derivatives [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, Fair Value Disclosure	$ 142,529	$ 122,194
Embedded Derivatives In Indexed Annuity [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 815,970	$ 861,758
Embedded Derivatives In Indexed Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.02	0.02
Embedded Derivatives In Indexed Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.04	0.04
Embedded Derivatives In Indexed Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.02	0.02
Embedded Derivatives In Variable Annuity [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 90,229	$ 152,470
Mortality Swap [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 308	$ 1,683
Measurement Input, Mortality Rate [Member] | Longevity Swap [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.02	0.02
Measurement Input, Mortality Rate [Member] | Longevity Swap [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	1.00	1.00
Measurement Input, Mortality Rate [Member] | Longevity Swap [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.00	0.00
Measurement Input, Mortality Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Weighted Average [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.02	0.02
Measurement Input, Mortality Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Maximum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	1.00	1.00
Measurement Input, Mortality Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Minimum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.00	0.00
Measurement Input, Mortality Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.02	0.02
Measurement Input, Mortality Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	1.00	1.00
Measurement Input, Mortality Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.00	0.00
Measurement Input, Mortality Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.01	0.01
Measurement Input, Mortality Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	1.00	1.00
Measurement Input, Mortality Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.00	0.00
Measurement Input, Mortality Rate [Member] | Mortality Swap [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.01	0.01
Measurement Input, Mortality Rate [Member] | Mortality Swap [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	1.00	1.00
Measurement Input, Mortality Rate [Member] | Mortality Swap [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.00	0.00
Measurement Input, Lapse Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Weighted Average [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.09	0.09
Measurement Input, Lapse Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Maximum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.35	0.35
Measurement Input, Lapse Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Minimum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.00	0.00
Measurement Input, Lapse Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.09	0.09
Measurement Input, Lapse Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.35	0.35
Measurement Input, Lapse Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.00	0.00
Measurement Input, Lapse Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.05	0.05
Measurement Input, Lapse Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.25	0.25
Measurement Input, Lapse Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.00	0.00
Measurement Input, Withdrawal Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Weighted Average [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.03	0.03
Measurement Input, Withdrawal Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Maximum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.05	0.05
Measurement Input, Withdrawal Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Minimum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.00	0.00
Measurement Input, Withdrawal Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.03	0.03
Measurement Input, Withdrawal Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.05	0.05
Measurement Input, Withdrawal Rate [Member] | Embedded Derivatives In Indexed Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.00	0.00
Measurement Input, Withdrawal Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.04	0.03
Measurement Input, Withdrawal Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.07	0.07
Measurement Input, Withdrawal Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.00	0.00
Measurement Input, Counterparty Credit Risk [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Weighted Average [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.01	0.01
Measurement Input, Counterparty Credit Risk [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Maximum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.05	0.05
Measurement Input, Counterparty Credit Risk [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Minimum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.00	0.00
Measurement Input, Counterparty Credit Risk [Member] | Embedded Derivatives In Variable Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.01	0.01
Measurement Input, Counterparty Credit Risk [Member] | Embedded Derivatives In Variable Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.05	0.05
Measurement Input, Counterparty Credit Risk [Member] | Embedded Derivatives In Variable Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.00	0.00
Measurement Input, Long-term Revenue Growth Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.13	0.08
Measurement Input, Long-term Revenue Growth Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.27	0.27
Measurement Input, Long-term Revenue Growth Rate [Member] | Embedded Derivatives In Variable Annuity [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input	0.00	0.00
Measurement Input Crediting Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Weighted Average [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.02	0.02
Measurement Input Crediting Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Maximum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.04	0.04
Measurement Input Crediting Rate [Member] | Funds Withheld At Interest Embedded Derivatives [Member] | Minimum [Member] | Valuation, Income Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Asset, Measurement Input	0.02	0.02
Measurement Input, EBITDA Multiple [Member] | Corporate Debt Securities [Member] | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	6.9	0
Measurement Input, EBITDA Multiple [Member] | Corporate Debt Securities [Member] | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	7.5	0
Measurement Input, EBITDA Multiple [Member] | Corporate Debt Securities [Member] | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	5.9	0
Measurement Input, EBITDA Multiple [Member] | Equity securities | Weighted Average [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Securities, FV-NI, Measurement Input	7.9	0
Measurement Input, EBITDA Multiple [Member] | Equity securities | Maximum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Securities, FV-NI, Measurement Input	12.3	0
Measurement Input, EBITDA Multiple [Member] | Equity securities | Minimum [Member] | Valuation, Market Approach [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Securities, FV-NI, Measurement Input	6.9	0
Measurement Input Mortality Improvement [Member] | Longevity Swap [Member] | Weighted Average [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.03	0.03
Measurement Input Mortality Improvement [Member] | Longevity Swap [Member] | Maximum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	0.10	0.10
Measurement Input Mortality Improvement [Member] | Longevity Swap [Member] | Minimum [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Instrument, Measurement Input	(0.10)	(0.10)

XML

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Changes in Level 3 Assets and Liabilities) (Details) - USD ($) $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2018		Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Corporate Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		$ 1,367,154		$ 1,291,054		$ 1,337,272	$ 1,272,253
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(4,858)		(2,700)		(35,532)	(2,300)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		123,808	[1]	107,670	[1]	379,476	257,671	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		(62,047)	[1]	(26,337)	[1]	79,316	49,511	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(101,868)	[1]	(88,551)	[1]	245,342	234,552	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		2,782		3,844		9,948	35,042
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		(69,119)		(12,973)		106,847	12,973
Fair Value, end of period		1,255,935		1,272,020		1,255,935	1,272,020
Corporate Debt Securities [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(156)		(383)		(822)	(1,202)
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		(180)		(394)		(845)	(1,213)
Corporate Debt Securities [Member] | Gain (Loss) on Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		239		396		(2,902)	7,592
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		(1,430)				(4,571)	(2,788)
Canadian Provincial Governments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		572,698		533,270		593,942	475,965
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(27,476)		(11,365)		(55,632)	39,669
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		0	[1]	0	[1]	0	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		0	[1]	0	[1]	0	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		0	[1]	0	[1]	0	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0		0		0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0		0		0	0
Fair Value, end of period		548,742		525,365		548,742	525,365
Canadian Provincial Governments [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		3,520		3,460		10,432	9,731
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		3,520		3,460		10,432	9,731
Canadian Provincial Governments [Member] | Gain (Loss) on Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0		0	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0				0	0
Residential mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		54,839		148,685		107,882	160,291
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(1)		104		(1,782)	2,716
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		0	[1]	26,765	[1]	45,328	72,582	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		0	[1]	(3,553)	[1]	4,961	18,624	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(3)	[1]	(3,645)	[1]	4,538	15,084	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0		15		3,031	5,515
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		(54,838)		(50,390)		145,140	89,621
Fair Value, end of period		0		117,995		0	117,995
Residential mortgage-backed securities | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		3		(30)		(132)	(304)
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		(27)		0	(155)
Residential mortgage-backed securities | Gain (Loss) on Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		44		312	524
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0				0	(346)
Asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		70,686		201,589		123,474	219,280
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(130)		(101)		(821)	6,802
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		11,099	[1]	0	[1]	22,099	45,215	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		(462)	[1]	0	[1]	462	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(24,166)	[1]	(15,243)	[1]	46,449	60,966	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		64,009		36,994		68,977	75,752
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		(38,915)		(78,202)		86,163	142,575
Fair Value, end of period		82,767		145,197		82,767	145,197
Asset-backed securities | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		20		160		202	1,689
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		13		156		187	556
Asset-backed securities | Gain (Loss) on Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		626		0		1,910	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0				0	0
US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		16,505		34,434		41,203	41,666
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(544)		(208)		46	(228)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		0	[1]	0	[1]	0	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]						0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(37)	[1]	35	[1]	158	309	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		9,859		7,295		9,859	7,295
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		(12,144)		0		37,309	6,844
Fair Value, end of period		13,645		41,512		13,645	41,512
US States and Political Subdivisions Debt Securities [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		6		26		4	(68)
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		6		26		3	(68)
US States and Political Subdivisions Debt Securities [Member] | Gain (Loss) on Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings							0
Debt Security, Government, Non-US [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		5,044				5,092
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(32)				(80)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		0	[1]			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		0	[1]			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0				0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0				0
Fair Value, end of period		5,012				5,012
Debt Security, Government, Non-US [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0				0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0				0
Foreign Government Debt [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period				11,994			12,869
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)				(7)			(210)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	[1]			495			495
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]						0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	[1]			0			672
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3				0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3				6,853			6,853
Fair Value, end of period				5,628			5,628
Foreign Government Debt [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings				(1)			(1)
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)				(1)			(1)
Foreign Government Debt [Member] | Gain (Loss) on Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings							0
US Government Agencies Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		20,735		23,567		22,511	24,488
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(122)		6		(635)	269
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		120	[1]	134	[1]	334	370	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]						0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(374)	[1]	340	[1]	1,634	1,528	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3				0		0	0
Fair Value, end of period		20,252		23,251		20,252	23,251
US Government Agencies Debt Securities [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(107)		(116)		(324)	(348)
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		(107)		(116)		(325)	(348)
US Government Agencies Debt Securities [Member] | Gain (Loss) on Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings							0
Commercial Mortgage Backed Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		1,867		1,943		3,234	21,145
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		7		5		(56)	(57)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		0	[1]	0	[1]	0	0	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]						3,720
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(1)	[1]	1	[1]	4	5,403	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		1,752		0		1,752	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		(1,843)		0		3,144	10,132
Fair Value, end of period		1,782		1,947		1,782	1,947
Commercial Mortgage Backed Securities [Member] | Investment Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0		0	709
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0		0	0
Commercial Mortgage Backed Securities [Member] | Gain (Loss) on Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings							(595)
ERROR in label resolution.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3		0		0		0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0
Funds Withheld At Interest Embedded Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		144,610		61,281		122,194	(22,529)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		0		0		0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	[1]	0		0		0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]	0				0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	[1]	0		0		0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3						0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0		0		0	0
Fair Value, end of period		142,529		84,325		142,529	84,325
Funds Withheld At Interest Embedded Derivatives [Member] | Gain (Loss) on Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(2,081)		23,044		20,335	106,854
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		(2,081)		23,044		20,335	106,854
Funds Withheld At Interest Embedded Derivatives [Member] | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0		0	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0		0	0
Funds Withheld At Interest Embedded Derivatives [Member] | Other Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0		0	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0		0	0
Longevity Swap [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		43,971		33,349		40,659	26,958
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		(307)		1,144		(1,552)	3,689
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases	[1]	0		0		0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]	0				0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements	[1]	0		0		0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3						0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0		0		0	0
Fair Value, end of period		46,090		37,827		46,090	37,827
Longevity Swap [Member] | Gain (Loss) on Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0		0	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0		0	0
Longevity Swap [Member] | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0		0	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0		0	0
Longevity Swap [Member] | Other Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		2,426		3,334		6,983	7,180
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		2,426		3,334		6,983	7,180
Interest Sensitive Contract Liabilities Embedded Derivatives [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales	[1]	0				0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3						0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		(928,797)		(974,631)		(1,014,228)	(990,308)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)		0		0		0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	[1]	(4,231)		(18,736)		(16,946)	(51,276)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	[1]	20,044		21,809		56,210	63,047
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3		0		0		0	0
Fair Value, end of period		(906,199)		(989,940)		(906,199)	(989,940)
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Gain (Loss) on Investments [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		(32,133)		10,047		(62,242)	(9,005)
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		(30,433)		11,900		(56,808)	(2,934)
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Interest Income [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		(25,348)		(8,335)		6,523	(20,408)
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		45,393		30,145		49,688	83,456
Interest Sensitive Contract Liabilities Embedded Derivatives [Member] | Other Income [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0		0		0	0
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0		0	0
Mortality Swap [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales	[1]	0				0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3						0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		782		1,552		1,683	2,462
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)		1		1		1	1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	[1]	0		0		0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	[1]	0		0		1,700	1,700
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3		0		0		0	0
Fair Value, end of period		(308)		(1,683)		(308)	(1,683)
Mortality Swap [Member] | Gain (Loss) on Investments [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0		0		0	0
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0		0	0
Mortality Swap [Member] | Interest Income [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		0		0		0	0
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0		0	0
Mortality Swap [Member] | Other Income [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings		(473)		132		326	922
Fair Value, Liabilities Measured on Recurring Basis, Change in Unrealized Gain (Loss)		(473)		132		(326)	922
Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		42,937				0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		0				0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		863				13,111
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		5,847				6,416
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		0				48
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3						38,905
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0				0
Fair Value, end of period		43,485				43,485
Equity securities | Gain (Loss) on Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		5,532				(2,067)
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		2,178				(5,527)
Equity securities | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0				0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0				0
Equity securities | Other Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0				0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0				0
ERROR in label resolution.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, beginning of period		3,217		3,548		3,096	3,346
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)		47		(3)		1	1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		1,721	[1]	3,164	[1]	2,202	3,520	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		0	[1]			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		0	[1]	(114)	[1]	314	(272)	[1]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3						0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		2,782		3,236		2,782	3,236
Fair Value, end of period		2,203		3,359		2,203	3,359
ERROR in label resolution. | Gain (Loss) on Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0		0	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0		0	0
ERROR in label resolution. | Interest Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0		0	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		0		0		0	0
ERROR in label resolution. | Other Income [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		0		0		0	0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss)		$ 0		$ 0		$ 0	$ 0

[1] The amount reported within purchases, sales and settlements is the purchase price (for purchases) and the sales/settlement proceeds (for sales and settlements) based upon the actual date purchased or sold/settled. Items purchased and sold/settled in the same period are excluded from the rollforward. The Company had no issuances during the period.

XML

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Fair Value Assets Measured on Non-Recurring Basis) (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2018		Sep. 30, 2017	Sep. 30, 2018		Sep. 30, 2017
Partnership Interest [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Assets Carrying Value Prior To Impairment	[1]				$ 2,246		$ 4,656
Fair Value Assets Gains Losses		$ (1,860)	[1]	$ (896)	(1,860)	[1]	(7,204)	[1]
Private Equity Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Assets Carrying Value Prior To Impairment	[2]				0		106
Fair Value Assets Gains Losses	[2]	$ 0		$ (531)	$ 0		$ (531)

[1] The impaired limited partnership interests presented above were accounted for using the cost method. Impairments on these cost method investments were recognized at estimated fair value determined using the net asset values of the Company’s ownership interest as provided in the financial statements of the investees. The market for these investments has limited activity and price transparency.

[2] The fair value of the Company’s private equity investments is based on external valuation models.

XML

Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Financial Instruments where Carrying Amounts and Fair Values May Differ) (Details) - USD ($) $ in Thousands		Sep. 30, 2018		Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Assets
Mortgage loans on real estate (net of valuation allowances)		$ 4,779,074		$ 4,400,533
Policy loans		1,320,050		1,357,624
Funds withheld at interest		5,976,301		6,083,388
Cash and cash equivalents		1,730,489		1,303,524	$ 1,204,590	$ 1,200,718
Short-term investments		229,928		93,304
Other invested assets		1,706,979		1,505,332
Accrued investment income		455,296		392,721
Liabilities
Interest-sensitive contract liabilities		16,751,379		16,227,642
Long-term debt		2,787,975		2,788,365
Collateral finance and securitization notes		710,792		783,938
Reported Value Measurement [Member]
Assets
Mortgage loans on real estate (net of valuation allowances)	[1]	4,779,074		4,400,533
Policy loans	[1]	1,320,050		1,357,624
Funds withheld at interest	[1]	5,833,925		5,955,092
Cash and cash equivalents	[1]	1,073,209		946,736
Short-term investments	[1]	43,877		42,558
Other invested assets	[1]	842,626		651,792
Accrued investment income	[1]	455,296		392,721
Liabilities
Interest-sensitive contract liabilities	[1]	13,319,348		12,683,872
Long-term debt	[1]	2,787,975
Debt, Long-term and Short-term, Combined Amount	[1]			2,788,365
Collateral finance and securitization notes	[1]	710,792		783,938
Estimate of Fair Value Measurement [Member]
Assets
Mortgage loans on real estate (net of valuation allowances)		4,652,481		4,477,654
Policy loans		1,320,050		1,357,624
Funds withheld at interest		6,040,671		6,275,623
Cash and cash equivalents		1,073,209		946,736
Short-term investments		43,877		42,558
Other invested assets		839,280		679,377
Accrued investment income		455,296		392,721
Liabilities
Interest-sensitive contract liabilities		13,113,427	[1]	12,917,243
Long-term Debt, Fair Value		2,850,344
Debt, Long-term and Short-term, Combined Amount				2,959,912
Collateral finance and securitization notes		652,380		722,145
Estimate of Fair Value Measurement [Member] | Fair Value Inputs Level 1 Member
Assets
Mortgage loans on real estate (net of valuation allowances)		0		0
Policy loans		0		0
Funds withheld at interest		0		0
Cash and cash equivalents		1,073,209		946,736
Short-term investments		43,877		42,558
Other invested assets		5,618		28,540
Accrued investment income		0		0
Liabilities
Interest-sensitive contract liabilities		0		0
Long-term Debt, Fair Value		0
Debt, Long-term and Short-term, Combined Amount				0
Collateral finance and securitization notes		0		0
Estimate of Fair Value Measurement [Member] | Fair Value Inputs Level 2 Member
Assets
Mortgage loans on real estate (net of valuation allowances)		0		0
Policy loans		1,320,050		1,357,624
Funds withheld at interest		0		0
Cash and cash equivalents		0		0
Short-term investments		0		0
Other invested assets		71,401		67,778
Accrued investment income		455,296		392,721
Liabilities
Interest-sensitive contract liabilities		0		0
Long-term Debt, Fair Value		0
Debt, Long-term and Short-term, Combined Amount				0
Collateral finance and securitization notes		0		0
Estimate of Fair Value Measurement [Member] | Fair Value Inputs Level 3 Member
Assets
Mortgage loans on real estate (net of valuation allowances)		4,652,481		4,477,654
Policy loans		0		0
Funds withheld at interest		6,040,671		6,275,623
Cash and cash equivalents		0		0
Short-term investments		0		0
Other invested assets		382,284		247,934
Accrued investment income		0		0
Liabilities
Interest-sensitive contract liabilities		13,113,427		12,917,243
Long-term Debt, Fair Value		2,850,344
Debt, Long-term and Short-term, Combined Amount				2,959,912
Collateral finance and securitization notes		652,380		722,145
Estimate of Fair Value Measurement [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Assets
Mortgage loans on real estate (net of valuation allowances)		0		0
Policy loans		0		0
Funds withheld at interest		0		0
Cash and cash equivalents		0		0
Short-term investments		0		0
Other invested assets		379,977		335,125
Accrued investment income		0		0
Liabilities
Interest-sensitive contract liabilities		0		0
Long-term Debt, Fair Value		0
Debt, Long-term and Short-term, Combined Amount				0
Collateral finance and securitization notes		$ 0		$ 0

[1] aid.September 30, 2018: Carrying Value (1) Estimated Fair Value Fair Value Measurement Using:Level 1 Level 2 Level 3 NAVAssets: Mortgage loans on real estate $4,779,074 $4,652,481 $— $— $4,652,481 $—Policy loans 1,320,050 1,320,050 — 1,320,050 — —Funds withheld at interest 5,833,925 6,040,671 — — 6,040,671 —Cash and cash equivalents 1,073,209 1,073,209 1,073,209 — — —Short-term investments 43,877 43,877 43,877 — — —Other invested assets 842,626 839,280 5,618 71,401 382,284 379,977Accrued investment income 455,296 455,296 — 455,296 — —Liabilities: Interest-sensitive contract liabilities $13,319,348 $13,113,427 $— $— $13,113,427 $—Long-term debt 2,787,975 2,850,344 — — 2,850,344 —Collateral finance and securitization notes 710,792 652,380 — — 652,380 — December 31, 2017: Carrying Value (1) Estimated Fair Value Fair Value Measurement Using:Level 1 Level 2 Level 3 NAVAssets: Mortgage loans on real estate $4,400,533 $4,477,654 $— $— $4,477,654 $—Policy loans 1,357,624 1,357,624 — 1,357,624 — —Funds withheld at interest 5,955,092 6,275,623 — — 6,275,623 —Cash and cash equivalents 946,736 946,736 946,736 — — —Short-term investments 42,558 42,558 42,558 — — —Other invested assets 651,792 679,377 28,540 67,778 247,934 335,125Accrued investment income 392,721 392,721 — 392,721 — —Liabilities: Interest-sensitive contract liabilities $12,683,872 $12,917,243 $— $— $12,917,243 $—Long-term debt 2,788,365 2,959,912 — — 2,959,912 —Collateral finance and securitization notes 783,938 722,145 — — 722,145 — (1)Carrying values presented herein may differ from those in the Company’s condensed consolidated balance sheets because certain items within the respective financial statement captions may be measured at fair value on a recurring basis.

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Fair Value of Assets and Liabilities Fair Value of Assets and Liabilities (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
Equity securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	$ 38,905

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Segment Information (Total Revenues of Reportable Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 3,227,531	$ 3,145,310	$ 9,597,146	$ 9,283,326
Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,838,638	1,785,553	5,335,779	5,367,576
CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	308,130	293,525	947,514	850,883
EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	448,723	438,013	1,403,861	1,255,413
Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	594,202	578,592	1,817,099	1,683,787
Corporate and Other [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	37,838	49,627	92,893	125,667
Life Insurance Product Line [Member] | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,547,790	1,521,383	4,601,631	4,532,584
Life Insurance Product Line [Member] | CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	295,962	281,095	910,480	814,643
Life Insurance Product Line [Member] | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	357,059	360,972	1,123,379	1,024,978
Life Insurance Product Line [Member] | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	578,035	561,660	1,763,094	1,628,419
Nontraditional Long-Duration Contracts [Member] | Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	290,848	264,170	734,148	834,992
Nontraditional Long-Duration Contracts [Member] | CANADA
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	12,168	12,430	37,034	36,240
Nontraditional Long-Duration Contracts [Member] | EMEA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	91,664	77,041	280,482	230,435
Nontraditional Long-Duration Contracts [Member] | Asia Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 16,167	$ 16,932	$ 54,005	$ 55,368

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Segment Information (Income Loss Before Provision for Income Tax of Reportable Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	$ 322,661	$ 340,162	$ 707,874	$ 887,321
Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	203,401	249,630	428,080	580,755
CANADA
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	22,795	33,261	75,042	93,442
EMEA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	74,575	46,374	200,997	132,527
Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	62,213	26,335	152,121	132,594
Corporate and Other [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	(40,323)	(15,438)	(148,366)	(51,997)
Life Insurance Product Line [Member] | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	116,328	160,512	191,198	281,066
Life Insurance Product Line [Member] | CANADA
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	21,149	28,789	66,661	80,953
Life Insurance Product Line [Member] | EMEA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	18,370	15,421	40,259	40,751
Life Insurance Product Line [Member] | Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	62,007	26,564	143,756	121,574
Nontraditional Long-Duration Contracts [Member] | Americas [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	87,073	89,118	236,882	299,689
Nontraditional Long-Duration Contracts [Member] | CANADA
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	1,646	4,472	8,381	12,489
Nontraditional Long-Duration Contracts [Member] | EMEA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	56,205	30,953	160,738	91,776
Nontraditional Long-Duration Contracts [Member] | Asia Pacific [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	$ 206	$ (229)	$ 8,365	$ 11,020

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Segment Information (Total Assets of Reportable Segments) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 62,972,642	$ 60,514,818
Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	38,400,622	34,562,629
CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,356,425	4,287,824
EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	8,158,746	8,374,488
Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	6,494,776	6,114,027
Corporate and Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	5,562,073	7,175,850
Life Insurance Product Line [Member] | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	19,148,790	18,603,423
Life Insurance Product Line [Member] | CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,210,051	4,161,452
Life Insurance Product Line [Member] | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	3,573,449	3,099,495
Life Insurance Product Line [Member] | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	5,312,822	4,915,442
Nontraditional Long-Duration Contracts [Member] | Americas [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	19,251,832	15,959,206
Nontraditional Long-Duration Contracts [Member] | CANADA
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	146,374	126,372
Nontraditional Long-Duration Contracts [Member] | EMEA [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,585,297	5,274,993
Nontraditional Long-Duration Contracts [Member] | Asia Pacific [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 1,181,954	$ 1,198,585

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Commitments, Contingencies and Guarantees (Commitments to Fund Investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Limited Partner [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 578,944	$ 485,197
Commercial Loan [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	120,571	40,815
Bank Loans [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	101,992	60,472
Equity Release Mortgages [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability	$ 213,459	$ 153,937

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Commitments, Contingencies and Guarantees (Maximum Potential Obligation) (Details) $ in Millions	Sep. 30, 2018 USD ($)
Commitment Period Two Thousand Twenty Three [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 500.0
Commitment Period Two Thousand Thirty Three [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	450.0
Commitment Period Two Thousand Thirty Four [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	2,000.0
Commitment Period Two Thousand Thirty Five [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	1,314.2
Commitment Period Two Thousand Thirty Six [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	1,932.0
Commitment Period Two Thousand Thirty Seven [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	6,750.0
Commitment Period Two Thousand Thirty Eight [Member]
Other Commitments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 800.0

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Commitments, Contingencies and Guarantees (Guarantees Issued) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Insurance Treaty Guarantee [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	$ 1,073,184	$ 1,047,449
Insurance Treaty Guarantee Net Of Assets Held In Trust [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	966,099	926,393
Guarantee Of Borrowed Securities [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	276,190	294,325
Product Financing Arrangement [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	69,221	86,183
Guarantee Of Lease Obligations [Member]
Guarantor Obligations [Line Items]
Guarantor Obligations, Current Carrying Value	$ 881	$ 1,662

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Income Tax (Provision for Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 67,759	$ 119,057	$ 148,654	$ 310,562
Tax Adjustments, Settlements, and Unusual Provisions	664	0	(2,685)	0
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	(58,949)	0	(59,139)	0
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	7,537	(3,635)	8,795	(14,049)
Income Tax Reconciliation Foreign Income Tax Basis Differential	(2,371)	2,126	(9,264)	(14,633)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	(5,334)	(2,501)	5,357	11,627
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Amount	1,851	299	650	(873)
Income Tax Reconciliation Change In Foreign Enacted Tax Rate	(166)	(1,139)	30	(2,332)
Income Tax Reconciliation SubpartF	(99)	64	211	1,390
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount	(544)	1,230	(1,003)	(834)
Effective Income Tax Rate Reconciliation Global Intangible Low Taxed Income	7,624	0	11,916	0
Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Amount	817	2,762	5,067	7,226	$ 10,500
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	4,213	452	4,108	133
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	94	(620)	(492)	(1,737)
Income Tax Expense (Benefit)	$ 21,462	$ 112,571	$ 102,071	$ 282,028
Effective Income Tax Rate Reconciliation, Percent	6.70%	33.10%	14.40%	31.80%

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Income Tax Income Tax (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			$ 2,573		$ 156,400
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 58,949	$ 0	$ 59,139	$ 0

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Employee Benefit Plans (Defined Benefit Plans Disclosure) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3,106	$ 2,699	$ 9,330	$ 8,098
Interest cost	1,341	1,314	4,028	3,943
Expected return on plan assets	(1,884)	(1,554)	(5,651)	(4,662)
Amortization of prior service cost	82	85	247	254
Amortization of prior actuarial loss	929	1,081	2,792	3,244
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	256	0	769
Total	3,574	3,881	10,746	11,646
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	999	465	2,271	1,907
Interest cost	680	459	1,739	1,589
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	(328)	(675)	(986)	(986)
Amortization of prior actuarial loss	937	580	1,933	1,494
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	0	0
Total	$ 2,288	$ 829	$ 4,957	$ 4,004

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Reinsurance (Ceded Reinsurance Receivable Assets) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 769,324	$ 782,027
Reinsurance Recoverables, Percentage of Total	100.00%	100.00%
Other Reinsurers [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 117,942	$ 127,808
Reinsurance Recoverables, Percentage of Total	15.30%	16.20%
AM Best, A+ Rating [Member] | Reinsurer A [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 303,942	$ 301,478
Reinsurance Recoverables, Percentage of Total	39.50%	38.60%
AM Best, A+ Rating [Member] | Reinsurer B [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 203,702	$ 203,898
Reinsurance Recoverables, Percentage of Total	26.50%	26.10%
AM Best, A+ Rating [Member] | Reinsurer D [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 41,049	$ 40,528
Reinsurance Recoverables, Percentage of Total	5.30%	5.20%
AM Best, A Rating [Member] | Reinsurer C [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 67,599	$ 67,723
Reinsurance Recoverables, Percentage of Total	8.80%	8.70%
AM Best, A++ Rating [Member] | Reinsurer E [Member]
Ceded Credit Risk [Line Items]
Reinsurance ceded receivables	$ 35,090	$ 40,592
Reinsurance Recoverables, Percentage of Total	4.60%	5.20%

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Reinsurance (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Ceded Credit Risk [Line Items]
Reinsurance Claims Recoverables	$ 269.1	$ 243.8
Claims Recoverable From Retrocessionaires Past Due	$ 6.7	$ 1.9
AM Best, A- Rating [Member]
Ceded Credit Risk [Line Items]
Ceded Credit Risk, Disclosure	“A- (excellent)”	“A- (excellent)”
AM Best, B++ Rating [Member]
Ceded Credit Risk [Line Items]
Ceded Credit Risk, Disclosure	B++

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Financing Activities (Details) - Revolving Credit Facility [Member] $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Covenant Terms	five year term
Line of Credit Facility, Maximum Borrowing Capacity	$ 850.0
Line of Credit Facility, Borrowing Capacity, Description	The Company may borrow cash and may obtain letters of credit in multiple currencies under this facility.

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New Accounting Standards New Accounting Standards (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification			$ 2,573		$ 156,400
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle					17,700
Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Amount	$ 817	$ 2,762	$ 5,067	$ 7,226	10,500
Contractual Obligation					$ 38,200