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Fair Value (Activity Under Level 3, Fair Value Measurements Using Significant Unobservable Inputs By Asset Type) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Transfers in and/or (out) of Level 3 | $ (2,458) |
Market Value [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning balance fixed maturities | 435,959 | $ 217,138
Total gains or (losses) (realized/unrealized) Included in earnings | 4,977 | 816
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss) | 573 | 235
Purchases, issuances and settlements | 6,073 | 13,734
Transfers in and/or (out) of Level 3 | (2,458) |
Ending balance | 445,124 | 231,923
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date |  |
Market Value [Member] | Corporate Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning balance fixed maturities | 428,215 | 210,186
Total gains or (losses) (realized/unrealized) Included in earnings | 4,858 | 722
Total gains or (losses) (realized/unrealized) Included in other comprehensive income (loss) | 573 | 235
Purchases, issuances and settlements | 6,638 | 9,412
Transfers in and/or (out) of Level 3 | (2,458) |
Ending balance | 437,826 | 220,555
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date |  |
Market Value [Member] | Foreign Corporate Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning balance fixed maturities | 7,744 | 6,952
Total gains or (losses) (realized/unrealized) Included in earnings | 119 | 94
Purchases, issuances and settlements | (565) | 4,322
Transfers in and/or (out) of Level 3 |  |
Ending balance | 7,298 | 11,368
The amount of total gains or losses for the period included in earnings (or changes in net assets) attributable to the change in unrealized gains or losses relating to assets still held at the reporting date |  |
Fair Value [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning balance fixed maturities | 2,337 |
Total gains or (losses) (realized/unrealized) Included in earnings | 13 | (14)
Purchases, issuances and settlements |  | 1,835
Ending balance | 2,350 | 1,821
Fair Value [Member] | Foreign Corporate Securities [Member] |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Beginning balance fixed maturities | 2,337 |
Total gains or (losses) (realized/unrealized) Included in earnings | 13 | (14)
Purchases, issuances and settlements |  | 1,835
Ending balance | $ 2,350 | $ 1,821

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