Equity - Schedule of Aggregate Distributions Declared for Applicable Class of Common Stock (Detail)	6 Months Ended
	Jun. 30, 2017 $ / shares
Class S Shares [Member]
Dividends Payable [Line Items]
Aggregate distributions declared per share of common stock	$ 0.1732
Stockholder servicing fee per share of common stock	(0.0377)
Net distributions declared per share of common stock	0.1355
Class I Shares [Member]
Dividends Payable [Line Items]
Aggregate distributions declared per share of common stock	0.1732
Net distributions declared per share of common stock	0.1732
Class D Shares [Member]
Dividends Payable [Line Items]
Aggregate distributions declared per share of common stock	0.0958
Stockholder servicing fee per share of common stock	(0.0042)
Net distributions declared per share of common stock	0.0916
Class T Shares [Member]
Dividends Payable [Line Items]
Aggregate distributions declared per share of common stock	0.0517
Stockholder servicing fee per share of common stock	(0.0071)
Net distributions declared per share of common stock	$ 0.0446