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Fair Value of Financial Instruments (Tables)
3 Months Ended
Mar. 31, 2020
Fair Value Disclosures [Abstract]  
Carrying Amount and Fair Value of Financial Instruments
The carrying amount and fair value of financial instruments are shown below (in thousands):
 March 31, 2020December 31, 2019
Carrying
Amount
Fair ValueCarrying
Amount
Fair Value
Financial assets
      Fixed maturity securities, bonds held-to-maturity$8,554,809  $8,501,656  $8,631,261  $8,968,690  
      Fixed maturity securities, bonds available-for-sale6,480,374  6,480,374  6,725,085  6,725,085  
Equity securities1,375,083  1,375,083  1,700,960  1,700,960  
Equity-indexed options125,988  125,988  256,005  256,005  
Mortgage loans on real estate, net of allowance5,125,365  5,497,500  5,097,017  5,309,005  
Policy loans380,084  380,084  379,657  379,657  
Short-term investments418,882  418,882  425,321  425,321  
Separate account assets ($871,196 and $1,049,938 included in fair value hierarchy)
893,856  893,856  1,073,891  1,073,891  
Separately managed accounts 50,583  50,583  50,503  50,503  
                Total financial assets$23,405,024  $23,724,006  $24,339,700  $24,889,117  
Financial liabilities
Investment contracts$10,242,029  $10,242,029  $10,254,959  $10,254,959  
Embedded derivative liability for equity-indexed contracts630,952  630,952  731,552  731,552  
Notes payable156,943  156,943  157,997  157,997  
Separate account liabilities ($871,196 and $1,049,938 included in fair value hierarchy)
893,856  893,856  1,073,891  1,073,891  
                Total financial liabilities$11,923,780  $11,923,780  $12,218,399  $12,218,399  
Schedule of Significant Unobservable Inputs Used to Calculate Level 3 Fair Value of Embedded Derivatives within Policyholder Contract Deposits Shown below are the significant unobservable inputs used to calculate the Level 3 fair value of the embedded derivatives within policyholder contract deposits (in millions, except range percentages):
 Fair Value Range
 March 31, 2020December 31, 2019Unobservable InputMarch 31, 2020December 31, 2019
Indexed Annuities$625.6  $706.5  Lapse Rate1-70%1-70%
Mortality Multiplier90-100%90-100%
Equity Volatility18-90%11-46%
Indexed Life5.4  25.1  Equity Volatility18-90%11-46%
Quantitative Disclosures Regarding Fair Value Hierarchy Measurements
The fair value hierarchy measurements of the financial instruments are shown below (in thousands):
 Assets and Liabilities Carried at Fair Value by Hierarchy Level as of March 31, 2020
 Total
Fair Value
Level 1Level 2Level 3
Financial assets
Fixed maturity securities, bonds available-for-sale
U.S. treasury and government$30,304  $—  $30,304  $—  
U.S. states and political subdivisions1,078,917  —  1,078,917  —  
Foreign governments6,432  —  6,432  —  
Corporate debt securities5,319,261  —  5,265,871  53,390  
Residential mortgage-backed securities29,585  —  29,585  —  
Collateralized debt securities15,875  —  15,875  —  
                  Total bonds available-for-sale6,480,374  —  6,426,984  53,390  
Equity securities
Common stock1,358,605  1,358,142  —  463  
Preferred stock16,478  16,478  —  —  
Total equity securities1,375,083  1,374,620  —  463  
Options125,988  —  —  125,988  
Short-term investments418,882  —  418,882  —  
Separate account assets871,196  215,339  655,857  —  
Separately managed accounts50,583  —  —  50,583  
Total financial assets$9,322,106  $1,589,959  $7,501,723  $230,424  
Financial liabilities
Embedded derivative for equity-indexed contracts$630,952  $—  $—  $630,952  
Separate account liabilities871,196  215,339  655,857  —  
Total financial liabilities$1,502,148  $215,339  $655,857  $630,952  

 Assets and Liabilities Carried at Fair Value by Hierarchy Level as of December 31, 2019
 Total
Fair Value
Level 1Level 2Level 3
Financial assets
Fixed maturity securities, bonds available-for-sale
U.S. treasury and government$29,941  $—  $29,941  $—  
U.S. states and political subdivisions1,078,165  —  1,078,165  —  
Foreign governments6,287  —  6,287  —  
Corporate debt securities5,576,620  —  5,531,776  44,844  
Residential mortgage-backed securities23,943  —  23,943  —  
Collateralized debt securities10,129  —  10,129  —  
Total bonds available-for-sale6,725,085  —  6,680,241  44,844  
Equity securities
Common stock1,682,149  1,681,686  —  463  
Preferred stock18,811  18,811  —  —  
Total equity securities1,700,960  1,700,497  —  463  
Options256,005  —  —  256,005  
Short-term investments425,321  —  425,321  —  
Separate account assets1,049,938  271,575  778,363  —  
Separately managed accounts50,503  —  —  50,503  
Total financial assets$10,207,812  $1,972,072  $7,883,925  $351,815  
Financial liabilities
Embedded derivative for equity-indexed contracts$731,552  $—  $—  $731,552  
Separate account liabilities1,049,938  271,575  778,363  —  
Total financial liabilities$1,781,490  $271,575  $778,363  $731,552  
The carrying value and estimated fair value of financial instruments not recorded at fair value on a recurring basis are shown below (in thousands):
 March 31, 2020
FV Hierarchy LevelCarrying
Amount
Fair Value
Financial assets
Fixed maturity securities, bonds held-to-maturity
U.S. states and political subdivisionsLevel 2$155,151  $159,929  
Foreign governmentsLevel 23,899  4,419  
Corporate debt securitiesLevel 28,011,160  7,956,612  
Residential mortgage-backed securitiesLevel 2179,084  186,919  
Collateralized debt securitiesLevel 2205,515  193,777  
Total fixed maturity securities, bonds held-to-maturity8,554,809  8,501,656  
Mortgage loans on real estate, net allowance
Level 35,125,365  5,497,500  
Policy loansLevel 3380,084  380,084  
Separately managed accountsLevel 350,583  50,583  
Total financial assets$14,110,841  $14,429,823  
Financial liabilities
Investment contractsLevel 3$10,242,029  $10,242,029  
Notes payableLevel 3156,943  156,943  
Total financial liabilities$10,398,972  $10,398,972  

 December 31, 2019
FV Hierarchy LevelCarrying
Amount
Fair Value
Financial assets
Fixed maturity securities, bonds held-to-maturity
U.S. states and political subdivisionsLevel 2$165,109  $170,114  
Foreign governmentsLevel 23,907  4,349  
Corporate debt securitiesLevel 28,099,098  8,424,969  
Residential mortgage-backed securitiesLevel 2237,516  242,828  
Collateralized debt securitiesLevel 2125,631  126,430  
Total fixed maturity securities, bonds held-to-maturity8,631,261  8,968,690  
Mortgage loans on real estate, net allowance
Level 35,097,017  5,309,005  
Policy loansLevel 3379,657  379,657  
Separately managed accountsLevel 350,503  50,503  
Total financial assets$14,158,438  $14,707,855  
Financial liabilities
Investment contractsLevel 3$10,254,959  $10,254,959  
Notes payableLevel 3157,997  157,997  
Total financial liabilities$10,412,956  $10,412,956  
Financial Instruments Measured at Fair Value on Recurring Basis Using (Level 3) Inputs
For financial instruments measured at fair value on a recurring basis using Level 3 inputs during the period, a reconciliation of the beginning and ending balances is shown below (in thousands):
 Level 3
 Three months ended March 31, 2020
 AssetsLiability
Investment
Securities
Equity-Indexed
Options
Separately Managed AccountsEmbedded
Derivative
Beginning balance$45,307  $256,005  $50,503  $731,552  
Net loss for derivatives included in net investment income—  (108,095) —  —  
Net change included in interest credited—  —  —  (89,581) 
Net fair value change included in other comprehensive income—  —  80  —  
Purchases, sales and settlements or maturities
Purchases22,702  14,164  —  —  
Sales(14,156) —  —  —  
Settlements or maturities—  (36,086) —  —  
Premiums less benefits—  —  —  (11,019) 
Ending balance at March 31, 2020$53,853  $125,988  $50,583  $630,952  
Change in unrealized gains or losses for the period included in other
comprehensive income for assets held at March 31, 2020
$—  $80  
Level 3
Three months ended March 31, 2019
AssetsLiability
Investment
Securities
Equity-Indexed
Options
Separately Managed AccountsEmbedded
Derivative
Beginning balance$4,346  $148,006  $—  $596,075  
Net gain for derivatives included in net investment income—  66,485  16,532  —  
Net change included in interest credited—  —  —  58,156  
Net fair value change included in other comprehensive income—  —   —  
Purchases, sales and settlements or maturities
Purchases—  17,356  4,505  —  
Sales—  —  —  —  
Settlements or maturities—  (15,691) —  —  
Premiums less benefits—  —  —  14,254  
Ending balance at March 31, 2019$4,346  $216,156  $21,046  $668,485