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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Annuity Deposits (Net of Coinsurance), By Product Type | Annuity deposits (net of coinsurance) collected in 2018, 2017 and 2016, by product type were as follows:
|  | Year Ended December 31,
Product Type |  | 2018 |  | 2017 |  | 2016
|  | (Dollars in thousands)
Fixed index annuities |  | $ | 3,898,366 |  |  | $ | 3,668,121 |  |  | $ | 5,035,818 |
Annual reset fixed rate annuities |  | 46,744 |  |  | 74,572 |  |  | 63,582 |
Multi-year fixed rate annuities |  | 22,818 |  |  | 22,291 |  |  | 256,894 |
Single premium immediate annuities (SPIA) |  | 23,813 |  |  | 24,946 |  |  | 35,851 |
|  | $ | 3,991,741 |  |  | $ | 3,789,930 |  |  | $ | 5,392,145 |

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