Real Estate Investments - Operator changes (Details) - Anthem Memory Care $ in Thousands	3 Months Ended
Dec. 31, 2017 USD ($) property	Jun. 30, 2017 USD ($) property
MC \| Master lease in default
Other disclosures
Number of properties in default		10
Properties under Development \| Master lease in default
Other disclosures
Number of properties in default		1
Properties acquired or in transition \| Operator agreements in transition
Other disclosures
Number of properties in transition	2	2
Write-off \| $		$ 1,880
Monthly minimum rent \| $	$ 400

Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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