Investments - Schedule of Loans Receivable, Net of Premium (Details) - USD ($) $ in Thousands |
Mar. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Loans and Leases Receivable Disclosure [Line Items] | ||
| Loans receivable, net | $ 107,403 | $ 109,425 |
| Mortgage Receivable | ||
| Loans and Leases Receivable Disclosure [Line Items] | ||
| Loans receivable, gross | 95,204 | 96,594 |
| Loan premium | 11,833 | 12,452 |
| Loans receivable, net | 107,037 | 109,046 |
| Notes Receivable | ||
| Loans and Leases Receivable Disclosure [Line Items] | ||
| Loans receivable, gross | $ 366 | $ 379 |