Deferred Policy Acquisition Costs and Value of Business Acquired (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| DPAC [Roll Forward] | |||
| Balance, beginning of period | $ 161,731 | $ 151,756 | $ 140,928 |
| Additions | 47,742 | 48,599 | 48,723 |
| VOBA interest | 0 | 0 | 0 |
| Amortization | (40,848) | (38,624) | (37,895) |
| Net change | 6,894 | 9,975 | 10,828 |
| Balance, end of period | 168,625 | 161,731 | 151,756 |
| VOBA [Roll Forward] | |||
| Balance, beginning of period | 28,917 | 32,344 | 36,361 |
| Additions | 0 | 0 | 0 |
| VOBA interest | 1,381 | 1,543 | 1,726 |
| Amortization | (4,136) | (4,970) | (5,743) |
| Net change | (2,755) | (3,427) | (4,017) |
| Balance, end of period | 26,162 | 28,917 | 32,344 |
| TOTAL [Roll Forward] | |||
| Balance, beginning of period | 190,648 | 184,100 | 177,289 |
| Additions | 47,742 | 48,599 | 48,723 |
| VOBA interest | 1,381 | 1,543 | 1,726 |
| Amortization | (44,984) | (43,594) | (43,638) |
| Net change | 4,139 | 6,548 | 6,811 |
| Balance, end of period | $ 194,787 | $ 190,648 | $ 184,100 |
| VOBA interest rate | 5.15% | 5.15% | 5.17% |
| Portion of DPAC and VOBA amortization recorded within unrealized gains on securities component of other comprehensive income | $ 3,147 | ||
| Value of business acquired future amortization expense [Abstract] | |||
| 2017 | 3,582 | ||
| 2018 | 2,597 | ||
| 2019 | 2,279 | ||
| 2020 | 2,009 | ||
| 2021 | $ 2,075 | ||