XML 62 R44.htm IDEA: XBRL DOCUMENT v3.21.1
Investments (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2021
USD ($)
security
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
security
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost $ 6,586,020   $ 6,317,164
Fair Value 6,811,318   6,661,596
Assets held by insurance regulatory requirements 13,900   14,100
Assets held in trust for the benefit of contractual counterparties $ 167,700   160,300
Collateral, market value to principal balance of FHLB (as a percent) 102.00%    
FHLB advance, collateral pledged $ 164,100   $ 163,900
Number of securities in unrealized loss position (in securities) | security 403   109
Total fixed income securities      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost $ 6,586,020   $ 6,317,164
Allowance for Expected Credit Loss (31) $ 0 (49)
Gross Unrealized Gains 259,132   349,140
Gross Unrealized Losses (33,803)   (4,659)
Fair Value 6,811,318   6,661,596
Proceeds from sales of fixed income securities 56,800 212,800  
Gross realized gains, fixed income securities 3,000 5,100  
Gross realized losses, fixed income securities 400 1,300  
Impairment charges recognized on securities with the intent to sell 0 $ 300  
Increase (decrease) in credit allowance for the period (18)    
U.S. Treasury securities and obligations of U.S. government corporations and agencies      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 252,806   264,531
Allowance for Expected Credit Loss 0   0
Gross Unrealized Gains 873   1,164
Gross Unrealized Losses (222)   (2)
Fair Value 253,457   265,693
Obligations of U.S. states and political subdivisions      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 2,249,876   2,083,568
Allowance for Expected Credit Loss 0   0
Gross Unrealized Gains 132,869   166,557
Gross Unrealized Losses (14,727)   (256)
Fair Value 2,368,018   2,249,869
Corporate debt securities      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 2,771,839   2,690,860
Allowance for Expected Credit Loss 0   0
Gross Unrealized Gains 104,279   155,156
Gross Unrealized Losses (14,990)   (1,728)
Fair Value 2,861,128   2,844,288
ABS      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 185,394   203,807
Allowance for Expected Credit Loss (31)   (49)
Gross Unrealized Gains 2,000   2,946
Gross Unrealized Losses (222)   (18)
Fair Value 187,141   206,686
RMBS      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 432,148   425,532
Allowance for Expected Credit Loss 0   0
Gross Unrealized Gains 5,270   6,472
Gross Unrealized Losses (1,410)   (838)
Fair Value 436,008   431,166
CMBS      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 317,055   312,572
Allowance for Expected Credit Loss 0   0
Gross Unrealized Gains 12,875   16,055
Gross Unrealized Losses (2,080)   (1,125)
Fair Value 327,850   327,502
CLOs      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 372,417   310,616
Allowance for Expected Credit Loss 0   0
Gross Unrealized Gains 966   566
Gross Unrealized Losses (56)   (692)
Fair Value 373,327   310,490
Foreign government debt      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 4,485   4,485
Allowance for Expected Credit Loss 0   0
Gross Unrealized Gains 0   224
Gross Unrealized Losses (96)   0
Fair Value $ 4,389   4,709
Commercial paper      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost     21,193
Allowance for Expected Credit Loss     0
Gross Unrealized Gains     0
Gross Unrealized Losses     0
Fair Value     $ 21,193