Subsequent Events - Gross Proceeds (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	9 Months Ended
	Nov. 10, 2022	Sep. 30, 2022	Sep. 30, 2021	Oct. 27, 2022
Subsequent Event [Line Items]
Shares (in shares)		4,341,000	3,830,000
Net proceeds to company		$ 136,747	$ 116,476
Average Net Proceeds Per Share (usd per share)		$ 31.49	$ 30.41
Proceeds from Public Offerings
Subsequent Event [Line Items]
Shares (in shares)		4,173,000	3,737,000
Gross Proceeds		$ 133,500	$ 115,342
Sales Load		(2,024)	(1,663)
Net Proceeds to Company		$ 131,476	$ 113,679
Class A
Subsequent Event [Line Items]
Shares (in shares)		541,000	342,000
Net proceeds to company		$ 16,959	$ 10,317
Average Net Proceeds Per Share (usd per share)		$ 31.31	$ 30.17
Class A | Proceeds from Public Offerings
Subsequent Event [Line Items]
Shares (in shares)		503,000	310,000
Gross Proceeds		$ 16,978	$ 10,087
Sales Load		(1,232)	(735)
Net Proceeds to Company		$ 15,746	$ 9,352
Class T
Subsequent Event [Line Items]
Shares (in shares)		557,000	656,000
Net proceeds to company		$ 17,423	$ 19,881
Average Net Proceeds Per Share (usd per share)		$ 31.28	$ 30.30
Class T | Proceeds from Public Offerings
Subsequent Event [Line Items]
Shares (in shares)		531,000	644,000
Gross Proceeds		$ 17,394	$ 20,442
Sales Load		(792)	(928)
Net Proceeds to Company		$ 16,602	$ 19,514
Class D
Subsequent Event [Line Items]
Shares (in shares)		664,000	465,000
Net proceeds to company		$ 20,586	$ 13,954
Average Net Proceeds Per Share (usd per share)		$ 30.96	$ 30.02
Class D | Proceeds from Public Offerings
Subsequent Event [Line Items]
Shares (in shares)		646,000	456,000
Gross Proceeds		$ 20,010	$ 13,691
Sales Load		0	0
Net Proceeds to Company		$ 20,010	$ 13,691
Class I
Subsequent Event [Line Items]
Shares (in shares)		2,579,000	2,367,000
Net proceeds to company		$ 81,779	$ 72,324
Average Net Proceeds Per Share (usd per share)		$ 31.71	$ 30.55
Class I | Proceeds from Public Offerings
Subsequent Event [Line Items]
Shares (in shares)		2,493,000	2,327,000
Gross Proceeds		$ 79,118	$ 71,122
Sales Load		0	0
Net Proceeds to Company		$ 79,118	$ 71,122
Subsequent Event
Subsequent Event [Line Items]
Shares (in shares)	515,000
Net proceeds to company	$ 16,497
Average Net Proceeds Per Share (usd per share)	$ 32.08
Subsequent Event | Proceeds from Public Offerings
Subsequent Event [Line Items]
Shares (in shares)	470,000
Gross Proceeds	$ 15,361
Sales Load	(279)
Net Proceeds to Company	$ 15,082
Subsequent Event | Distribution Reinvestment Plan
Subsequent Event [Line Items]
Shares (in shares)	45,000
Gross Proceeds	$ 1,415
Subsequent Event | Class A
Subsequent Event [Line Items]
Shares (in shares)	51,000
Net proceeds to company	$ 1,612
Average Net Proceeds Per Share (usd per share)	$ 31.90			$ 34.89
Subsequent Event | Class A | Proceeds from Public Offerings
Subsequent Event [Line Items]
Shares (in shares)	42,000
Gross Proceeds	$ 1,445
Sales Load	(101)
Net Proceeds to Company	$ 1,344
Subsequent Event | Class A | Distribution Reinvestment Plan
Subsequent Event [Line Items]
Shares (in shares)	9,000
Gross Proceeds	$ 268
Subsequent Event | Class T
Subsequent Event [Line Items]
Shares (in shares)	118,000
Net proceeds to company	$ 3,780
Average Net Proceeds Per Share (usd per share)	$ 31.92			33.52
Subsequent Event | Class T | Proceeds from Public Offerings
Subsequent Event [Line Items]
Shares (in shares)	112,000
Gross Proceeds	$ 3,739
Sales Load	(178)
Net Proceeds to Company	$ 3,561
Subsequent Event | Class T | Distribution Reinvestment Plan
Subsequent Event [Line Items]
Shares (in shares)	6,000
Gross Proceeds	$ 219
Subsequent Event | Class D
Subsequent Event [Line Items]
Shares (in shares)	80,000
Net proceeds to company	$ 2,513
Average Net Proceeds Per Share (usd per share)	$ 31.58			31.59
Subsequent Event | Class D | Proceeds from Public Offerings
Subsequent Event [Line Items]
Shares (in shares)	74,000
Gross Proceeds	$ 2,339
Sales Load	0
Net Proceeds to Company	$ 2,339
Subsequent Event | Class D | Distribution Reinvestment Plan
Subsequent Event [Line Items]
Shares (in shares)	6,000
Gross Proceeds	$ 174
Subsequent Event | Class I
Subsequent Event [Line Items]
Shares (in shares)	266,000
Net proceeds to company	$ 8,592
Average Net Proceeds Per Share (usd per share)	$ 32.34			$ 32.35
Subsequent Event | Class I | Proceeds from Public Offerings
Subsequent Event [Line Items]
Shares (in shares)	242,000
Gross Proceeds	$ 7,838
Sales Load	0
Net Proceeds to Company	$ 7,838
Subsequent Event | Class I | Distribution Reinvestment Plan
Subsequent Event [Line Items]
Shares (in shares)	24,000
Gross Proceeds	$ 754