Fair Value Measurements - Summary of Fair Values of Real Estate Investments Measured at Nonrecurring Basis (Details) - Fair Value Measurements, Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Net Carrying Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Non-financial long-lived assets	$ 2,413	$ 3,238
Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Non-financial long-lived assets	2,413	3,238
Fair Value | Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Non-financial long-lived assets	$ 2,413	$ 3,238