Equity - Schedule of Company's Outstanding Shares of Common Stock (Detail)	6 Months Ended
	Jun. 30, 2017 shares
Class of Stock [Line Items]
Beginning balance	20,000
Common stock issued	88,481,000
Distribution reinvestment	422,000
Directors’ restricted stock grant	7,000
Ending balance	88,930,000
Class T Shares [Member]
Class of Stock [Line Items]
Beginning balance	0
Common stock issued	13,000
Ending balance	13,460
Class S Shares [Member]
Class of Stock [Line Items]
Beginning balance	0
Common stock issued	71,060,000
Distribution reinvestment	322,000
Ending balance	71,382,151
Class D Shares [Member]
Class of Stock [Line Items]
Beginning balance	0
Common stock issued	216,000
Distribution reinvestment	1,000
Ending balance	216,570
Class I Shares [Member]
Class of Stock [Line Items]
Beginning balance	20,000
Common stock issued	17,192,000
Distribution reinvestment	99,000
Directors’ restricted stock grant	7,000
Ending balance	17,318,240