Variable Interest Entities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Total assets	$ 1,006,548	$ 1,007,091
Total equity	518,934	523,429
Total liabilities and equity	1,006,548	1,007,091
Net real estate investments
Variable Interest Entity [Line Items]
Total assets	971,038	973,813
Cash and cash equivalents
Variable Interest Entity [Line Items]
Total assets	18,712	18,678
Receivables and other assets
Variable Interest Entity [Line Items]
Total assets	16,798	14,600
Secured debt
Variable Interest Entity [Line Items]
Liabilities	464,186	465,433
Lease liabilities
Variable Interest Entity [Line Items]
Liabilities	1,327
Accrued expenses and other liabilities
Variable Interest Entity [Line Items]
Liabilities	$ 22,101	$ 18,229