Real Estate Activities - Adeptus Health Transition Properties - Additional Information (Detail) - Adeptus Health Transition Properties [Member] $ in Millions		12 Months Ended
Oct. 02, 2017 Property	Dec. 31, 2019 USD ($) Facility	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Number of facilities transitioned \| Property	16
Amortization of straight-line rent receivables		$ 1.5	$ 6.1
Real estate impairment charge		$ 0.5	$ 18.0
Number of transitioned facilities not re-leased \| Facility		3
Percentage of investment in remaining transition facilities on total assets		0.10%

The charge against earnings in the period to reduce the carrying amount of real property to fair value.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230

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