XML 123 R74.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Fair Value (Narrative) (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
Item
Dec. 31, 2018
USD ($)
Dec. 31, 2005
Item
Dec. 31, 2001
Item
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fair value of public equity portfolio $ 170,888,000 $ 124,228,000    
Number of equity index put option contracts | Item 4   7 7
Derivatives, number of indices | Item     2 2
Equity index put option contracts $ 5,584,000 11,958,000    
Other invested assets 612,997,000 358,042,000    
Transfers between level 1 and 2 0      
Transfers from level 3 4,695,000 2,942,000    
Settlement amount if contracts had expired 0      
Significant Unobservable Inputs (Level 3) [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Equity index put option contracts $ 5,584,000 11,958,000    
Standard & Poor's Five Hundred Index [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Number of equity index put option contracts | Item 2      
Theoretical maximum payout occurs based on index value $ 0      
Estimates the probability of equity index put option contract will falling below the strike price on the exercise date 0.40%      
Discount factor 3.00%      
Present value of theoretical maximum payouts $ 208,359,000      
Settlement amount if contracts had expired 0      
Equity Index $ 3,230.78      
FTSE 100 Index [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Number of equity index put option contracts | Item 1      
Estimates the probability of equity index put option contract will falling below the strike price on the exercise date 4.00%      
Discount factor 3.00%      
Present value of theoretical maximum payouts $ 42,899,000      
Equity Index 7,542.44      
Fair Value [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Transfers from level 3    
Fair Value [Member] | Amortized Cost [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Other invested assets 209,578,000 117,662,000    
Fixed Maturities [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Available-for-sale Securities 772,979,000 435,959,000    
Fixed Maturities [Member] | Investment Manager's Valuation Committee Value [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Available-for-sale Securities 610,873,000 354,143,000    
Fixed Maturities [Member] | Non-Binding Broker Quote [Member] | Significant Unobservable Inputs (Level 3) [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Available-for-sale Securities   1,153,000    
Fixed Maturities [Member] | Fair Value [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Available-for-sale Securities 5,826,000 2,337,000    
Fixed Maturities [Member] | Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Available-for-sale Securities 162,106,000      
Fixed Maturities [Member] | Fair Value [Member] | Investment Manager's Valuation Committee Value [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Available-for-sale Securities $ 5,826,000 2,337,000    
Fixed Maturities [Member] | Par Value [Member] | Significant Unobservable Inputs (Level 3) [Member]        
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Available-for-sale Securities   $ 80,663,000