v3.21.2

Summary of Significant Accounting Policies - Summary of Rents Received in Advance (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Rent received in advance	$ 14,516	$ 13,651

X

- Definition

Amount at the balance sheet date that has been received by the entity that represents rents paid in advance.

+ References

No definition available.

+ Details

Name:	us-gaap_AdvanceRent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration