Statutory Information - Schedule of Statutory Net Loss, Surplus, Contingency Reserve and Risk-to-Capital Ratio (Details) - Combined $ in Thousands |
9 Months Ended | 12 Months Ended |
|---|---|---|
|
Sep. 30, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
|
| Statutory Accounting Practices [Line Items] | ||
| Statutory net loss | $ (23,808) | $ (52,322) |
| Statutory surplus | 367,987 | 391,422 |
| Contingency reserve | $ 72,014 | $ 32,564 |
| Risk-to-Capital | 11.7 | 8.7 |