Investment and Disposition Activity - Disposition Narrative (Details) - Dispositions Second Quarter Twenty Nineteen - Disposal Group, Disposed of by Sale, Not Discontinued Operations $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019 USD ($) states healthcareproperty	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) states healthcareproperty	Jun. 30, 2018 USD ($)
Business Acquisition [Line Items]
Number of medical office buildings \| healthcareproperty	2		2
Number of states in which operating healthcare properties and land parcel located \| states	2		2
Proceeds from divestiture of businesses	$ 12,500
Gain (loss) on sale of investment properties	$ 3,033	$ 0	$ 3,033	$ 0

Number Of States In Which Operating Healthcare Properties And Land Parcel Located

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Number of Medical Office Buildings

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- Definition

Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Paragraph 28
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-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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-Topic 230
-SubTopic 10
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