Variable Interest Entities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Total assets	$ 1,004,148	$ 1,007,091
Total equity	518,821	523,429
Total liabilities and equity	1,004,148	1,007,091
Net real estate investments
Variable Interest Entity [Line Items]
Total assets	963,338	973,813
Cash and cash equivalents
Variable Interest Entity [Line Items]
Total assets	23,881	18,678
Receivables and other assets
Variable Interest Entity [Line Items]
Total assets	16,929	14,600
Secured debt
Variable Interest Entity [Line Items]
Liabilities	461,480	465,433
Lease liabilities
Variable Interest Entity [Line Items]
Liabilities	1,326	0
Accrued expenses and other liabilities
Variable Interest Entity [Line Items]
Liabilities	$ 22,521	$ 18,229