Equity - Schedule of Company's Authorized Capital (Detail) - $ / shares	Jun. 30, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Preferred Stock, Number of Shares, Authorized to issue	100,000,000	100,000,000
Number of Shares, Authorized to issue, Total	2,100,000,000
Preferred Stock, Par Value	$ 0.01	$ 0.01
Class S Shares [Member]
Class of Stock [Line Items]
Common Stock, Number of Shares, Authorized to issue	500,000,000	500,000,000
Common Stock, Par Value	$ 0.01	$ 0.01
Class T Shares [Member]
Class of Stock [Line Items]
Common Stock, Number of Shares, Authorized to issue	500,000,000	500,000,000
Common Stock, Par Value	$ 0.01	$ 0.01
Class D Shares [Member]
Class of Stock [Line Items]
Common Stock, Number of Shares, Authorized to issue	500,000,000	500,000,000
Common Stock, Par Value	$ 0.01	$ 0.01
Class I Shares [Member]
Class of Stock [Line Items]
Common Stock, Number of Shares, Authorized to issue	500,000,000	500,000,000
Common Stock, Par Value	$ 0.01	$ 0.01