In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)(2)
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

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- Definition

In a business combination achieved in stages, this element represents the amount of loss recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

+ References

No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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- Definition

Revenue, comprised of base and incentive revenue derived from the management of joint ventures, managing third-party properties, or another entity's operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(d))
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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- Definition

The number of businesses acquired by the entity during the period.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The number of properties that are accounted for under the equity method of accounting.

+ References

No definition available.

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Investments in Unconsolidated Entities (Details) $ in Millions	1 Months Ended		12 Months Ended
	Oct. 31, 2015 USD ($) property	Mar. 31, 2013 USD ($) property	Dec. 31, 2015 USD ($) property	Dec. 31, 2014 USD ($) property	Dec. 31, 2013 USD ($)
Equity method investments
Ownership interests in properties accounted for under the equity method (as a percent)			5.00%
Number of properties accounted for under equity method \| property			41	51
Management fees earned in connection with unconsolidated entities \| $			$ 7.8	$ 8.4	$ 7.0
Loss on re-measurement of equity method investments \| $	$ 0.2
Minimum
Equity method investments
Ownership interests in properties accounted for under the equity method (as a percent)			5.00%
Maximum
Equity method investments
Ownership interests in properties accounted for under the equity method (as a percent)			25.00%
Two Medical Office Buildings Acquired March 2013
Equity method investments
Number of businesses acquired \| property		2
Gain on re-measurement of equity method investments \| $		$ 1.3
Medical Office Buildings in October 2015
Equity method investments
Ownership interests in properties accounted for under the equity method (as a percent)	95.00%
Number of businesses acquired \| property	10
Atria
Equity method investments
Ownership interests in properties accounted for under the equity method (as a percent)			34.00%
Ardent
Equity method investments
Ownership interests in properties accounted for under the equity method (as a percent)			9.90%