XML 41 R41.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Investments (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Investment [Line Items]      
Equity Method Investments $ 0 $ 0  
Fair Value of Securities Received as Collateral that Can be Resold or Repledged $ 302,000 $ 675,000  
Commercial mortgage loans, Percentage 100.00% 100.00%  
Commercial mortgage and others loans, Acquired $ 0 $ 0  
Commercial mortgage and other loans, Sold 206,000 96,000  
Securities Sold under Agreements to Repurchase 0 0  
Fixed maturities, available-for-sale: 13,202,365 9,771,673  
Fixed maturities      
Investment [Line Items]      
Gross Unrealized Gains 792,306 86,799  
Gross Unrealized losses 55,687 501,591  
Gross unrealized losses of twelve months or more 10,071 432,255  
Fixed maturities, available-for-sale: 13,202,365 9,771,673  
Assets Deposited With Governmental Authorities 10,700 8,400  
NAIC high or highest quality rating | Fixed maturities      
Investment [Line Items]      
Gross Unrealized losses 52,500 485,700  
NAIC other than high or highest quality rating | Fixed maturities      
Investment [Line Items]      
Gross Unrealized losses 3,200 15,900  
Other Income (Loss) | Equity securities      
Investment [Line Items]      
Unrealized Gain (Loss) on Investments 2,000 (1,900)  
Other Comprehensive Income (Loss) | Equity securities      
Investment [Line Items]      
Unrealized Gain (Loss) on Investments     $ 400
Fixed maturities      
Investment [Line Items]      
Gross unrealized losses of twelve months or more 10,100 $ 432,300  
Carrying value of non-income producing assets      
Investment [Line Items]      
Fixed maturities, available-for-sale: $ 4,100    
California      
Investment [Line Items]      
Commercial mortgage loans, Percentage 27.00%    
Texas      
Investment [Line Items]      
Commercial mortgage loans, Percentage 13.00%    
New York      
Investment [Line Items]      
Commercial mortgage loans, Percentage 7.00%    
Europe      
Investment [Line Items]      
Commercial mortgage loans, Percentage 16.00%    
Australia      
Investment [Line Items]      
Commercial mortgage loans, Percentage 4.00%