Investments - Other Investments (Details) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Schedule of Investments [Line Items] | ||
| Other investments | $ 11,812 | $ 12,571 |
| % of Total fair value | 100.00% | 100.00% |
| Investments in limited partnerships | ||
| Schedule of Investments [Line Items] | ||
| Other investments | $ 5,907 | $ 5,581 |
| % of Total fair value | 50.00% | 44.40% |
| Unfunded commitment on investments in limited partnerships | $ 622 | $ 736 |
| Investments in quoted equity | ||
| Schedule of Investments [Line Items] | ||
| Other investments | $ 4,905 | $ 5,990 |
| % of Total fair value | 41.50% | 47.60% |
| Other | ||
| Schedule of Investments [Line Items] | ||
| Other investments | $ 1,000 | $ 1,000 |
| % of Total fair value | 8.50% | 8.00% |