Subsequent Events - Gross Proceeds (Detail) - USD ($)	2 Months Ended	11 Months Ended	12 Months Ended
	Mar. 13, 2020	Dec. 31, 2018	Dec. 31, 2019	Mar. 01, 2020	Feb. 28, 2020	Jan. 28, 2020
Subsequent Event [Line Items]
Shares (in shares)		3,854,515	2,524,449
Net Proceeds to Company			$ 67,991,333
Average Net Proceeds Per Share (in dollars per share)		$ 25.17	$ 26.93
Class FA Private Offering, Follow-On Class FA Private Offering and Public Offering
Subsequent Event [Line Items]
Shares (in shares)		3,850,671
Class FA
Subsequent Event [Line Items]
Shares (in shares)		3,258,260	1,008,488
Net Proceeds to Company		$ 81,456,500	$ 27,586,447
Average Net Proceeds Per Share (in dollars per share)		$ 25.00	$ 27.35
Class FA | 2019 Private Placement and Follow On Private Placement [Member]
Subsequent Event [Line Items]
Shares (in shares)			1,008,488
Proceeds from sale of new shares			$ 27,628,371
Net Proceeds to Company			27,586,447
Class FA | Follow On Private Placement [Member]
Subsequent Event [Line Items]
Up-front Selling Commissions and Placement Agent / Dealer Manager Fees			$ (41,924)
Class A
Subsequent Event [Line Items]
Shares (in shares)		192,388	477,054
Net Proceeds to Company		$ 5,064,779	$ 12,682,767
Average Net Proceeds Per Share (in dollars per share)		$ 26.33	$ 26.59
Class A | Class FA Private Offering, Follow-On Class FA Private Offering and Public Offering
Subsequent Event [Line Items]
Shares (in shares)		190,046	463,565
Proceeds from sale of new shares		$ 5,435,093	$ 13,294,279
Up-front Selling Commissions and Placement Agent / Dealer Manager Fees		(430,953)	(970,592)
Net Proceeds to Company		$ 5,004,140	$ 12,323,687
Class I
Subsequent Event [Line Items]
Shares (in shares)		249,526	688,769
Net Proceeds to Company		$ 6,502,654	$ 18,421,781
Average Net Proceeds Per Share (in dollars per share)		$ 26.06	$ 26.75
Class I | Class FA Private Offering, Follow-On Class FA Private Offering and Public Offering
Subsequent Event [Line Items]
Shares (in shares)		249,136	679,491
Proceeds from sale of new shares		$ 6,492,500	$ 18,173,050
Up-front Selling Commissions and Placement Agent / Dealer Manager Fees		0	0
Net Proceeds to Company		$ 6,492,500	$ 18,173,050
Class T
Subsequent Event [Line Items]
Shares (in shares)		31,452	167,210
Net Proceeds to Company		$ 820,613	$ 4,478,330
Average Net Proceeds Per Share (in dollars per share)		$ 26.09	$ 26.78
Class T | Class FA Private Offering, Follow-On Class FA Private Offering and Public Offering
Subsequent Event [Line Items]
Shares (in shares)		31,432	166,277
Proceeds from sale of new shares		$ 861,000	$ 4,675,452
Up-front Selling Commissions and Placement Agent / Dealer Manager Fees		(40,897)	(222,084)
Net Proceeds to Company		$ 820,103	$ 4,453,368
Class D
Subsequent Event [Line Items]
Shares (in shares)		122,889	182,928
Net Proceeds to Company		$ 3,188,533	$ 4,822,008
Average Net Proceeds Per Share (in dollars per share)		$ 25.95	$ 26.36
Class D | Class FA Private Offering, Follow-On Class FA Private Offering and Public Offering
Subsequent Event [Line Items]
Shares (in shares)		121,797	176,604
Proceeds from sale of new shares		$ 3,160,000	$ 4,655,674
Up-front Selling Commissions and Placement Agent / Dealer Manager Fees		0	0
Net Proceeds to Company		$ 3,160,000	$ 4,655,674
Subsequent Event [Member]
Subsequent Event [Line Items]
Shares (in shares)	762,157
Net Proceeds to Company	$ 20,806,594
Average Net Proceeds Per Share (in dollars per share)	$ 27.30
Subsequent Event [Member] | Distribution Reinvestment Plan
Subsequent Event [Line Items]
Shares (in shares)	12,823
Proceeds from sale of new shares	$ 344,573
Subsequent Event [Member] | 2019 Private Offering and Public Offering [Member]
Subsequent Event [Line Items]
Shares (in shares)	749,334
Proceeds from sale of new shares	$ 20,817,435
Up-front Selling Commissions and Placement Agent / Dealer Manager Fees	(355,414)
Net Proceeds to Company	$ 20,462,021
Subsequent Event [Member] | Class FA
Subsequent Event [Line Items]
Shares (in shares)	407,607
Net Proceeds to Company	$ 11,258,725
Average Net Proceeds Per Share (in dollars per share)	$ 27.62
Subsequent Event [Member] | Class FA | 2019 Private Placement and Follow On Private Placement [Member]
Subsequent Event [Line Items]
Shares (in shares)	407,607
Proceeds from sale of new shares	$ 11,339,000
Net Proceeds to Company	11,258,725
Subsequent Event [Member] | Class FA | Follow On Private Placement [Member]
Subsequent Event [Line Items]
Up-front Selling Commissions and Placement Agent / Dealer Manager Fees	$ (80,275)
Average Net Proceeds Per Share (in dollars per share)						$ 30.207650273224
Subsequent Event [Member] | Class FA | Distribution Reinvestment Plan
Subsequent Event [Line Items]
Shares (in shares)	0
Proceeds from sale of new shares	$ 0
Subsequent Event [Member] | Class A
Subsequent Event [Line Items]
Shares (in shares)	97,428
Net Proceeds to Company	$ 2,613,349
Average Net Proceeds Per Share (in dollars per share)	$ 26.82			$ 29.23	$ 29.25	29.41
Subsequent Event [Member] | Class A | Class FA Private Offering, Follow-On Class FA Private Offering and Public Offering
Subsequent Event [Line Items]
Shares (in shares)	92,163
Proceeds from sale of new shares	$ 2,632,286
Up-front Selling Commissions and Placement Agent / Dealer Manager Fees	(160,299)
Net Proceeds to Company	$ 2,471,987
Subsequent Event [Member] | Class A | Distribution Reinvestment Plan
Subsequent Event [Line Items]
Shares (in shares)	5,265
Proceeds from sale of new shares	$ 141,362
Subsequent Event [Member] | Class I
Subsequent Event [Line Items]
Shares (in shares)	149,841
Net Proceeds to Company	$ 4,053,104
Average Net Proceeds Per Share (in dollars per share)	$ 27.05			26.99	27	27.15
Subsequent Event [Member] | Class I | Class FA Private Offering, Follow-On Class FA Private Offering and Public Offering
Subsequent Event [Line Items]
Shares (in shares)	145,326
Proceeds from sale of new shares	$ 3,930,955
Up-front Selling Commissions and Placement Agent / Dealer Manager Fees	0
Net Proceeds to Company	$ 3,930,955
Subsequent Event [Member] | Class I | Distribution Reinvestment Plan
Subsequent Event [Line Items]
Shares (in shares)	4,515
Proceeds from sale of new shares	$ 122,149
Subsequent Event [Member] | Class T
Subsequent Event [Line Items]
Shares (in shares)	86,486
Net Proceeds to Company	$ 2,330,070
Average Net Proceeds Per Share (in dollars per share)	$ 26.94			28.16	28.19	28.36
Subsequent Event [Member] | Class T | Class FA Private Offering, Follow-On Class FA Private Offering and Public Offering
Subsequent Event [Line Items]
Shares (in shares)	85,475
Proceeds from sale of new shares	$ 2,417,694
Up-front Selling Commissions and Placement Agent / Dealer Manager Fees	(114,840)
Net Proceeds to Company	$ 2,302,854
Subsequent Event [Member] | Class T | Distribution Reinvestment Plan
Subsequent Event [Line Items]
Shares (in shares)	1,011
Proceeds from sale of new shares	$ 27,216
Subsequent Event [Member] | Class D
Subsequent Event [Line Items]
Shares (in shares)	20,795
Net Proceeds to Company	$ 551,346
Average Net Proceeds Per Share (in dollars per share)	$ 26.51			$ 26.4	$ 26.44	$ 26.61
Subsequent Event [Member] | Class D | Class FA Private Offering, Follow-On Class FA Private Offering and Public Offering
Subsequent Event [Line Items]
Shares (in shares)	18,763
Proceeds from sale of new shares	$ 497,500
Up-front Selling Commissions and Placement Agent / Dealer Manager Fees	0
Net Proceeds to Company	$ 497,500
Subsequent Event [Member] | Class D | Distribution Reinvestment Plan
Subsequent Event [Line Items]
Shares (in shares)	2,032
Proceeds from sale of new shares	$ 53,846