Investments - Schedule of Components of Real Estate Investments Held Under Direct Financing Leases (Details) - USD ($) $ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Investments in and Advances to Affiliates, Schedule of Investments [Abstract] | ||
| Minimum lease payments receivable | $ 10,124 | $ 12,702 |
| Estimated residual value of leased assets | 35,640 | 43,789 |
| Unearned income | (9,751) | (12,167) |
| Real estate assets under direct financing leases, net | $ 36,013 | $ 44,324 |