Fair Value Disclosures - Financial Assets and Liabilities Not Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Carrying Value
Carrying Value and Estimated Fair Values [Line Items]
Cash and cash equivalents	$ 3,814	$ 12,939
Restricted cash	615	1,812
Mortgage notes payable, net	0	47,074
Line of credit	186,000	56,000
Notes payable, net	897,443	996,722
Fair Value
Carrying Value and Estimated Fair Values [Line Items]
Cash and cash equivalents	3,814	12,939
Restricted cash	615	1,812
Mortgage notes payable, net	0	47,899
Line of credit	186,000	56,000
Notes payable, net	$ 921,394	$ 1,022,937