Real Estate and Lending Activities - Disposals - Additional Information (Detail) $ in Millions	9 Months Ended
Sep. 30, 2020 USD ($) Facility Property
Business Combinations [Abstract]
Number of facilities sold \| Facility	9
Number of properties sold \| Property	6
Proceeds from sale of facilities	$ 93.0
Net loss on real estate dispositions	$ 2.7

Cash received for the sale of real estate that is not part of an investing activity during the current period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromSaleOfRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration