Intangible Assets, Net - Schedule of Remaining Weighted-Average Amortization Period for Intangible Assets (Detail)	9 Months Ended
Sep. 30, 2021
Anchor Tenant Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Remaining weighted-average amortization period	12 years 7 months 6 days
In-Place Leases [Member]
Finite Lived Intangible Assets [Line Items]
Remaining weighted-average amortization period	9 years 10 months 24 days

Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

Name:	us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration