Acquisitions of Rental Property - Purchase Price Allocation for Real Estate Acquisitions (Parenthetical) - (Detail) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021
Business Acquisition [Line Items]
Tenant's building expansion	$ 17.4
Acquired In-Place Leases
Business Acquisition [Line Items]
Weighted average amortization period	20 years	14 years
Acquired Above-Market Lease
Business Acquisition [Line Items]
Weighted average amortization period	0 years	10 years
Acquired Below-Market Leases
Business Acquisition [Line Items]
Weighted average amortization period	9 years	0 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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