Principal Business and Organization - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2019	Mar. 31, 2020	Dec. 31, 2019
Class FA
Organization And Business Activities [Line Items]
Common stock, shares authorized (in shares)		7,400,000	7,400,000
Class FA | 2019 Private Offering [Member]
Organization And Business Activities [Line Items]
Number of shares offered in 2019 Private Offering	50,000,000
Shares (in shares)		300,000
Class A
Organization And Business Activities [Line Items]
Common stock, shares authorized (in shares)		94,660,000	94,660,000
Class T
Organization And Business Activities [Line Items]
Common stock, shares authorized (in shares)		558,620,000	658,620,000
Class D
Organization And Business Activities [Line Items]
Common stock, shares authorized (in shares)		94,660,000	94,660,000
Class I
Organization And Business Activities [Line Items]
Common stock, shares authorized (in shares)		94,660,000	94,660,000
Common Class S- [Member]
Organization And Business Activities [Line Items]
Common stock, shares authorized (in shares)		100,000,000
Minimum
Organization And Business Activities [Line Items]
Targeted business annual revenues for acquisition		$ 15
Maximum
Organization And Business Activities [Line Items]
Targeted business annual revenues for acquisition		$ 250