Investments - Summary of Loans Receivable (Details) - USD ($)
$ in Thousands |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
| Loans and Leases Receivable Disclosure [Line Items] |
|
|
|
| Mortgage loans and other note receivables, net |
$ 47,044
|
$ 78,466
|
|
| Mortgage Receivable |
|
|
|
| Loans and Leases Receivable Disclosure [Line Items] |
|
|
|
| Mortgage loans and other note receivables, gross |
42,660
|
|
|
| Mortgage loans - premium, net of amortization |
2,527
|
|
|
| Allowance for loan losses |
0
|
|
|
| Mortgage loans and other note receivables, net |
45,187
|
|
|
| Notes Receivable |
|
|
|
| Loans and Leases Receivable Disclosure [Line Items] |
|
|
|
| Mortgage loans and other note receivables, gross |
2,082
|
|
|
| Mortgage loans - premium, net of amortization |
(225)
|
|
|
| Mortgage loans and other note receivables, net |
$ 1,857
|
5,355
|
$ 3,974
|
| Continuing operations and discontinued operations |
|
|
|
| Loans and Leases Receivable Disclosure [Line Items] |
|
|
|
| Mortgage loans and other note receivables, net |
|
79,967
|
|
| Continuing operations and discontinued operations | Mortgage Receivable |
|
|
|
| Loans and Leases Receivable Disclosure [Line Items] |
|
|
|
| Mortgage loans and other note receivables, gross |
|
69,963
|
|
| Mortgage loans - premium, net of amortization |
|
5,038
|
|
| Allowance for loan losses |
|
(389)
|
|
| Mortgage loans and other note receivables, net |
|
74,612
|
|
| Continuing operations and discontinued operations | Notes Receivable |
|
|
|
| Loans and Leases Receivable Disclosure [Line Items] |
|
|
|
| Mortgage loans and other note receivables, gross |
|
5,355
|
|
| Mortgage loans - premium, net of amortization |
|
0
|
|
| Mortgage loans and other note receivables, net |
|
$ 5,355
|
|