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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 |  |

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