Declaration of Distributions - Additional Information (Detail)	Dec. 20, 2018 $ / shares
Schedule Of Stockholders Equity [Line Items]
Common stock daily distribution declared	$ 0.0016980822
Common stock daily distribution declared date	Dec. 20, 2018
Cash distribution record date start	Jan. 01, 2019
Cash distribution record date end	Mar. 31, 2019
Class T Common Stock [Member]
Schedule Of Stockholders Equity [Line Items]
Common stock daily distribution payable	$ 0.00142
Class W Common Stock [Member]
Schedule Of Stockholders Equity [Line Items]
Common stock daily distribution payable	$ 0.00157