|
Investments - Gross Mortgage Loan Principal Outstanding and Allowance for Potential Future Losses (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2014
|
Dec. 31, 2013
|
|---|---|---|
| Investments [Abstract] | ||
| Principal outstanding | $ 572,811 | $ 632,507 |
| Allowance for potential future losses | (2,325) | (3,251) |
| Mortgage loans, carrying value | $ 570,486 | $ 629,256 |