Variable Interest Entities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Total assets	$ 1,004,319	$ 1,007,091
Total equity	518,235	523,429
Total liabilities and equity	1,004,319	1,007,091
Net real estate investments
Variable Interest Entity [Line Items]
Total assets	966,417	973,813
Cash and cash equivalents
Variable Interest Entity [Line Items]
Total assets	22,491	18,678
Receivables and other assets
Variable Interest Entity [Line Items]
Total assets	15,411	14,600
Secured debt
Variable Interest Entity [Line Items]
Liabilities	462,836	465,433
Lease liabilities
Variable Interest Entity [Line Items]
Liabilities	1,326
Accrued expenses and other liabilities
Variable Interest Entity [Line Items]
Liabilities	$ 21,922	$ 18,229