Leases - Lessor - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Lessor Disclosure [Abstract]
Direct financing and sales-type leases, gain	$ 1,064	$ 33	$ 2,350	$ 47

Amount of profit (loss) for sales-type lease and (loss) for direct financing lease recognized at commencement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 5
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=124258985&loc=SL77919372-209981

Name:	us-gaap_SalesTypeAndDirectFinancingLeasesProfitLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration