Investments (Tables)

3 Months Ended

Mar. 31, 2019

The following tables provide information relating to investments in fixed maturity securities by sector as of March 31, 2019 and December 31, 2018 (dollars in thousands):



March 31, 2019:	Amortized		Unrealized		Unrealized		Estimated Fair		% of		Other-than- temporary impairments
	Cost		Gains		Losses		Value		Total		in AOCI
Available-for-sale:
Corporate	$	24,216,876	$	1,024,557	$	164,095	$	25,077,338	60.1	%	$	—
Canadian government	2,870,018		1,408,501		655		4,277,864		10.2		—
RMBS	1,969,694		34,746		10,254		1,994,186		4.8		—
ABS	2,243,449		14,286		15,749		2,241,986		5.4		275
CMBS	1,404,852		30,009		3,115		1,431,746		3.4		—
U.S. government	1,578,975		9,826		21,238		1,567,563		3.8		—
State and political subdivisions	738,690		56,668		2,641		792,717		1.9		—
Other foreign government	4,166,073		201,446		12,476		4,355,043		10.4		—
Total fixed maturity securities	$	39,188,627	$	2,780,039	$	230,223	$	41,738,443	100.0	%	$	275



December 31, 2018:	Amortized		Unrealized		Unrealized		Estimated Fair		% of		Other-than- temporary impairments
	Cost		Gains		Losses		Value		Total		in AOCI
Available-for-sale:
Corporate	$	24,006,407	$	530,804	$	555,092	$	23,982,119	59.9	%	$	—
Canadian government	2,768,466		1,126,227		2,308		3,892,385		9.7		—
RMBS	1,872,236		22,267		25,282		1,869,221		4.7		—
ABS	2,171,254		10,779		32,829		2,149,204		5.4		275
CMBS	1,428,115		9,153		18,234		1,419,034		3.5		—
U.S. government	2,233,537		10,204		57,867		2,185,874		5.5		—
State and political subdivisions	721,290		39,914		9,010		752,194		1.9		—
Other foreign government	3,680,863		109,320		47,868		3,742,315		9.4		—
Total fixed maturity securities	$	38,882,168	$	1,858,668	$	748,490	$	39,992,346	100.0	%	$	275

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 March 31, 2019 and December 31, 2018 (dollars in thousands):



	March 31, 2019				December 31, 2018
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Fixed maturity securities pledged as collateral	$	74,647	$	77,806	$	80,891	$	83,950
Fixed maturity securities received as collateral	n/a		668,046		n/a		616,584
Assets in trust held to satisfy collateral requirements	20,635,739		21,609,979		20,072,735		20,366,170

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 March 31, 2019 and December 31, 2018 (dollars in thousands).



	March 31, 2019				December 31, 2018
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Fixed maturity securities guaranteed or issued by:
Canadian province of Quebec	$	1,128,373	$	1,955,925	$	1,091,018	$	1,757,087
Canadian province of Ontario	946,731		1,287,150		913,642		1,187,526

Investments Classified By Contractual Maturity Date

The amortized cost and estimated fair value of fixed maturity securities classified as available-for-sale as of March 31, 2019 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	$	1,409,578	$	1,419,110
Due after one year through five years	8,141,200		8,340,166
Due after five years through ten years	8,933,926		9,345,621
Due after ten years	15,085,928		16,965,628
Asset and mortgage-backed securities	5,617,995		5,667,918
Total	$	39,188,627	$	41,738,443

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 March 31, 2019 and December 31, 2018 (dollars in thousands):



March 31, 2019:			Estimated
	Amortized Cost		Fair Value		% of Total
Finance	$	8,981,541	$	9,249,273	36.9	%
Industrial	12,316,131		12,759,526		50.9
Utility	2,919,204		3,068,539		12.2
Total	$	24,216,876	$	25,077,338	100.0	%

December 31, 2018:			Estimated
	Amortized Cost		Fair Value		% of Total
Finance	$	8,793,742	$	8,730,568	36.3	%
Industrial	12,336,857		12,342,111		51.6
Utility	2,875,808		2,909,440		12.1
Total	$	24,006,407	$	23,982,119	100.0	%

Investments In Debt And Equity Securities Gross Unrealized Losses Disclosures

The following table presents the total gross unrealized losses for the 1,585 and 3,109 fixed maturity securities as of March 31, 2019 and December 31, 2018, respectively, where the estimated fair value had declined and remained below amortized cost by the indicated amount (dollars in thousands):



	March 31, 2019				December 31, 2018
	Gross Unrealized Losses		% of Total		Gross Unrealized Losses		% of Total
Less than 20%	$	208,034	90.3	%	$	721,015	96.3	%
20% or more for less than six months	20,845		9.1		21,336		2.9
20% or more for six months or greater	1,344		0.6		6,139		0.8
Total	$	230,223	100.0	%	$	748,490	100.0	%

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

The following tables present the estimated fair values and gross unrealized losses, including other-than-temporary impairment losses reported in AOCI, for 1,585 and 3,109 fixed maturity securities that have estimated fair values below amortized cost as of March 31, 2019 and December 31, 2018, respectively (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
March 31, 2019:	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
Investment grade securities:
Corporate	$	1,140,753	$	23,578	$	3,756,371	$	108,434	$	4,897,124	$	132,012
Canadian government	2,812		19		72,244		636		75,056		655
RMBS	29,505		122		672,715		10,109		702,220		10,231
ABS	774,538		7,246		528,169		8,472		1,302,707		15,718
CMBS	100,664		369		227,404		2,746		328,068		3,115
U.S. government	1,265		1		1,125,274		21,237		1,126,539		21,238
State and political subdivisions	31,416		149		113,463		2,492		144,879		2,641
Other foreign government	115,581		2,813		345,928		7,213		461,509		10,026
Total investment grade securities	2,196,534		34,297		6,841,568		161,339		9,038,102		195,636
Below investment grade securities:
Corporate	215,368		21,398		161,915		10,685		377,283		32,083
RMBS	—		—		1,001		23		1,001		23
ABS	—		—		1,029		31		1,029		31
Other foreign government	27,413		838		27,301		1,612		54,714		2,450
Total below investment grade securities	242,781		22,236		191,246		12,351		434,027		34,587
Total fixed maturity securities	$	2,439,315	$	56,533	$	7,032,814	$	173,690	$	9,472,129	$	230,223



	Less than 12 months				12 months or greater				Total
			Gross				Gross				Gross
December 31, 2018:	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
Investment grade securities:
Corporate	$	8,505,371	$	302,604	$	3,611,266	$	195,082	$	12,116,637	$	497,686
Canadian government	25,169		419		131,806		1,612		156,975		2,031
RMBS	269,558		2,488		836,741		22,760		1,106,299		25,248
ABS	1,102,677		24,271		381,609		8,523		1,484,286		32,794
CMBS	384,259		4,304		414,719		13,930		798,978		18,234
U.S. government	8,616		80		1,086,694		57,787		1,095,310		57,867
State and political subdivisions	103,504		1,538		157,330		7,472		260,834		9,010
Other foreign government	789,859		24,509		472,934		17,446		1,262,793		41,955
Total investment grade securities	11,189,013		360,213		7,093,099		324,612		18,282,112		684,825
Below investment grade securities:
Corporate	755,679		42,760		122,559		14,646		878,238		57,406
Canadian government	443		34		1,770		243		2,213		277
RMBS	—		—		1,026		34		1,026		34
ABS	—		—		1,063		35		1,063		35
Other foreign government	128,725		5,574		7,479		339		136,204		5,913
Total below investment grade securities	884,847		48,368		133,897		15,297		1,018,744		63,665
Total fixed maturity securities	$	12,073,860	$	408,581	$	7,226,996	$	339,909	$	19,300,856	$	748,490

Investment Income

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



	Three months ended March 31,
	2019			2018
Fixed maturity securities available-for-sale	$	415,087		$	369,203
Equity securities	1,246			1,682
Mortgage loans on real estate	59,562			50,199
Policy loans	14,109			14,780
Funds withheld at interest	61,734			75,445
Short-term investments and cash and cash equivalents	6,900			3,245
Other invested assets	42,236			23,828
Investment income	600,874			538,382
Investment expense	(20,997		)	(22,053		)
Investment income, net of related expenses	$	579,877		$	516,329

Gain Loss On Investments

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



	Three months ended March 31,
	2019			2018
Fixed maturity securities available-for-sale:
Other-than-temporary impairment losses	$	(9,453	)	$	—
Gain on investment activity	28,045			10,966
Loss on investment activity	(18,723		)	(20,380		)
Equity securities:
Gain on investment activity	74			28
Loss on investment activity	(1		)	(950		)
Change in unrealized gains (losses) recognized in earnings	3,744			(4,137		)
Other impairment losses and change in mortgage loan provision	(1,859		)	(312		)
Derivatives and other, net	5,961			14,315
Total investment related gains (losses), net	$	7,788		$	(470	)

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 March 31, 2019 and December 31, 2018 (dollars in thousands).



	March 31, 2019				December 31, 2018
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Borrowed securities	$	339,593	$	371,473	$	335,781	$	366,663
Securities lending:
Securities loaned	97,510		100,665		101,981		102,618
Securities received	n/a		107,000		n/a		112,000
Repurchase program/reverse repurchase program:
Securities pledged	548,100		558,981		554,806		554,589
Securities received	n/a		558,523		n/a		530,932

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 March 31, 2019 and December 31, 2018 (dollars in thousands). Collateral associated with certain borrowed securities is not included within the tables, as the collateral pledged to each counterparty is the right to reinsurance treaty cash flows.



	March 31, 2019
	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	$	—	$	—	$	—	$	100,665	$	100,665
Total	—		—		—		100,665		100,665
Repurchase transactions:
Corporate	—		—		—		267,846		267,846
U.S. government	—		—		43,657		165,272		208,929
Foreign government	—		—		—		82,206		82,206
Total	—		—		43,657		515,324		558,981
Total borrowings	$	—	$	—	$	43,657	$	615,989	$	659,646

Gross amount of recognized liabilities for securities lending and repurchase transactions in preceding table									$	694,271
Amounts related to agreements not included in offsetting disclosure									$	34,625



	December 31, 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	$	—	$	—	$	—	$	102,618	$	102,618
Total	—		—		—		102,618		102,618
Repurchase transactions:
Corporate	—		—		—		254,151		254,151
U.S. government	—		—		—		221,572		221,572
Foreign government	—		—		—		78,866		78,866
Total	—		—		—		554,589		554,589
Total borrowings	$	—	$	—	$	—	$	657,207	$	657,207

Gross amount of recognized liabilities for securities lending and repurchase transactions in preceding table									$	671,492
Amounts related to agreements not included in offsetting disclosure									$	14,285

Disclosure Of Real Estate Holdings By Property Type [Table Text Block]

The distribution of mortgage loans by property type is as follows as of March 31, 2019 and December 31, 2018 (dollars in thousands):



	March 31, 2019					December 31, 2018
Property type:	Carrying Value			% of Total		Carrying Value			% of Total
Office building	$	1,707,764		33.3	%	$	1,725,748		34.6	%
Retail	1,495,883			29.1		1,432,394			28.7
Industrial	1,021,871			19.9		961,924			19.3
Apartment	620,926			12.1		571,291			11.5
Other commercial	288,454			5.6		291,997			5.9
Recorded investment	$	5,134,898		100.0	%	$	4,983,354		100.0	%
Unamortized balance of loan origination fees and expenses	(6,135		)			(5,770		)
Valuation allowances	(11,218		)			(11,286		)
Total mortgage loans on real estate	$	5,117,545				$	4,966,298

Mortgage Loans Classified By Contractual Maturity Date [Table Text Block]

The maturities of mortgage loans as of March 31, 2019 and December 31, 2018 are as follows (dollars in thousands):



	March 31, 2019				December 31, 2018
	Recorded Investment		% of Total		Recorded Investment		% of Total
Due within five years	$	1,449,925	28.2	%	$	1,425,598	28.6	%
Due after five years through ten years	2,833,275		55.2		2,686,264		53.9
Due after ten years	851,698		16.6		871,492		17.5
Total	$	5,134,898	100.0	%	$	4,983,354	100.0	%

Mortgage Loan Internal Credit Risk Grade [Table Text Block]

The following tables set forth certain key credit quality indicators of the Company’s recorded investment in mortgage loans as of March 31, 2019 and December 31, 2018 (dollars in thousands):



	Recorded Investment
	Debt Service Ratios						Construction loans
	>1.20x		1.00x - 1.20x		<1.00x		Construction loans		Total		% of Total
March 31, 2019:
Loan-to-Value Ratio
0% - 59.99%	$	2,477,507	$	87,802	$	36,998	$	16,556	$	2,618,863	51.0	%
60% - 69.99%	1,692,549		78,559		41,680		21,051		1,833,839		35.7
70% - 79.99%	403,173		27,591		42,008		—		472,772		9.2
Greater than 80%	117,390		49,522		42,512		—		209,424		4.1
Total	$	4,690,619	$	243,474	$	163,198	$	37,607	$	5,134,898	100.0	%



	Recorded Investment
	Debt Service Ratios						Construction loans
	>1.20x		1.00x - 1.20x		<1.00x		Construction loans		Total		% of Total
December 31, 2018:
Loan-to-Value Ratio
0% - 59.99%	$	2,410,556	$	61,246	$	38,177	$	13,691	$	2,523,670	50.6	%
60% - 69.99%	1,618,374		73,908		38,120		18,929		1,749,331		35.1
70% - 79.99%	414,269		48,438		54,440		—		517,147		10.4
Greater than 80%	117,978		49,668		25,560		—		193,206		3.9
Total	$	4,561,177	$	233,260	$	156,297	$	32,620	$	4,983,354	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 March 31, 2019 and December 31, 2018 is as follows (dollars in thousands):



	March 31, 2019		December 31, 2018
31-60 days past due	$	11,795	$	—
61-90 days past due	17,079		—
Total past due	28,874		—
Current	5,106,024		4,983,354
Total	$	5,134,898	$	4,983,354

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 March 31, 2019 and December 31, 2018 (dollars in thousands):



	March 31, 2019		December 31, 2018
Mortgage loans:
Individually measured for impairment	$	17,079	$	30,635
Collectively measured for impairment	5,117,819		4,952,719
Recorded investment	$	5,134,898	$	4,983,354
Valuation allowances:
Individually measured for impairment	$	—	$	—
Collectively measured for impairment	11,218		11,286
Total valuation allowances	$	11,218	$	11,286

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 months ended March 31, 2019 and 2018 is as follows (dollars in thousands):



	Three months ended March 31,
	2019			2018
Balance, beginning of period	$	11,286		$	9,384
Provision (release)	(73		)	(516		)
Translation adjustment	5			(4		)
Balance, end of period	$	11,218		$	8,864

Impaired Financing Receivables Table

Information regarding the portion of the Company’s mortgage loans that were impaired as of March 31, 2019 and December 31, 2018 is as follows (dollars in thousands):



	Unpaid Principal Balance		Recorded Investment		Related Allowance		Carrying Value
March 31, 2019:
Impaired mortgage loans with no valuation allowance recorded	$	17,084	$	17,079	$	—	$	17,079
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	17,084	$	17,079	$	—	$	17,079
December 31, 2018:
Impaired mortgage loans with no valuation allowance recorded	$	30,660	$	30,635	$	—	$	30,635
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	30,660	$	30,635	$	—	$	30,635

The Company’s average investment balance of impaired mortgage loans and the related interest income are reflected in the table below for the periods indicated (dollars in thousands):
	Three months ended March 31,
	2019				2018
	Average Recorded Investment⁽¹⁾		Interest Income		Average Recorded Investment⁽¹⁾		Interest Income
Impaired mortgage loans with no valuation allowance recorded	$	23,857	$	328	$	14,640	$	56
Impaired mortgage loans with valuation allowance recorded	—		—		—		—
Total impaired mortgage loans	$	23,857	$	328	$	14,640	$	56

(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 March 31, 2019 and December 31, 2018 are as follows (dollars in thousands):



	March 31, 2019		December 31, 2018
Limited partnership interests and real estate joint ventures	$	982,592	$	965,094
Equity release mortgages	595,559		475,905
Derivatives	132,412		180,699
FVO contractholder-directed unit-linked investments	202,848		197,770
Other	93,459		95,829
Total other invested assets	$	2,006,870	$	1,915,297