Net Investment Income (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Interest and/or dividend income from [Abstract] | |||
| Interest and/or dividend income | $ 48,913 | $ 45,174 | $ 47,540 |
| Fixed Maturities [Member] | |||
| Interest and/or dividend income from [Abstract] | |||
| Interest and/or dividend income | 37,139 | 36,256 | 38,559 |
| Equity Securities [Member] | |||
| Interest and/or dividend income from [Abstract] | |||
| Interest and/or dividend income | 9,666 | 7,146 | 7,660 |
| Policy Loans [Member] | |||
| Interest and/or dividend income from [Abstract] | |||
| Interest and/or dividend income | 619 | 557 | 545 |
| Cash Equivalents and Interest-Bearing Deposits [Member] | |||
| Interest and/or dividend income from [Abstract] | |||
| Interest and/or dividend income | 257 | 143 | 117 |
| Other [Member] | |||
| Interest and/or dividend income from [Abstract] | |||
| Interest and/or dividend income | $ 1,232 | $ 1,072 | $ 659 |