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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Accounting Policies [Abstract] |
Premiums and Annuity Deposits, Net of Coinsurance, By Product Type | Premiums and annuity deposits (net of coinsurance) collected in 2016, 2015 and 2014, by product type were as follows:
|  | Year Ended December 31,
Product Type |  | 2016 |  | 2015 |  | 2014
|  | (Dollars in thousands)
Fixed index annuities |  | $ | 5,035,818 |  |  | $ | 6,491,981 |  |  | $ | 3,911,109 |
Annual reset fixed rate annuities |  | 63,582 |  |  | 44,715 |  |  | 56,647 |
Multi-year fixed rate annuities |  | 256,894 |  |  | 42,709 |  |  | 21,125 |
Single premium immediate annuities (SPIA) |  | 35,851 |  |  | 32,752 |  |  | 24,580 |
Life insurance |  | 9,946 |  |  | 10,917 |  |  | 10,810 |
|  | $ | 5,402,091 |  |  | $ | 6,623,074 |  |  | $ | 4,024,271 |

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