Real Estate and Lending Activities - Summary of Status on Current Development Projects (Detail) $ in Thousands	9 Months Ended
Sep. 30, 2020 USD ($)
Business Acquisition [Line Items]
Commitment	$ 75,429
Costs Incurred as of September 30, 2020	36,251
NeuroPsychiatric Hospitals [Member] \| Houston, Texas [Member]
Business Acquisition [Line Items]
Commitment	27,500
Costs Incurred as of September 30, 2020	$ 20,241
Estimated Rent Commencement Date	2Q 2021
Ernest [Member] \| Bakersfield, California [Member]
Business Acquisition [Line Items]
Commitment	$ 47,929
Costs Incurred as of September 30, 2020	$ 16,010
Estimated Rent Commencement Date	4Q 2021

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

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