This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 9

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 6

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 19

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.12)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 11

-Article 7

+ Details

Investments in Unconsolidated Entities (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Investments In Unconsolidated Joint Ventures [Line Items]
Income from unconsolidated entities	$ 2,482,000	$ 5,772,000	$ 6,673,000
Equity investments	438,936,000	241,722,000
Senior Housing Facilities Triple Net [Member]
Investments In Unconsolidated Joint Ventures [Line Items]
Income from unconsolidated entities	(33,000)	(9,000)	0
Equity investments	34,618,000	30,975,000
Investment percentage range	10% to 49%
Number of properties in portfolio	21
Seniors Housing Operating [Member]
Investments In Unconsolidated Joint Ventures [Line Items]
Income from unconsolidated entities	(6,364,000)	(1,531,000)	0
Equity investments	217,701,000	15,429,000
Investment percentage range	33% to 50%
Number of properties in portfolio	39
Medical Facilities [Member]
Investments In Unconsolidated Joint Ventures [Line Items]
Income from unconsolidated entities	8,879,000	7,312,000	6,673,000
Equity investments	186,617,000	195,318,000
Investment percentage range	36% to 49%
Number of properties in portfolio	13
Strategic Medical Office Partnership [Member]
Investments In Unconsolidated Joint Ventures [Line Items]
Number of properties in portfolio			17
Strategic Medical Office Partnership [Member] \| Controlling [Member]
Investments In Unconsolidated Joint Ventures [Line Items]
Number of properties in portfolio			11
Strategic Medical Office Partnership [Member] \| Non Controlling [Member]
Investments In Unconsolidated Joint Ventures [Line Items]
Number of properties in portfolio			6
Chartwell Partnership [Member]
Investments In Unconsolidated Joint Ventures [Line Items]
Equity investments	223,134,000
Number of properties in portfolio	42
Percentage of partnership owned	50.00%
Unamortized investment	8,656,000
Chartwell Partnership [Member] \| Controlling [Member]
Investments In Unconsolidated Joint Ventures [Line Items]
Number of properties in portfolio	3
Chartwell Partnership [Member] \| Non Controlling [Member]
Investments In Unconsolidated Joint Ventures [Line Items]
Number of properties in portfolio	39
Forest City [Member]
Investments In Unconsolidated Joint Ventures [Line Items]
Equity investments	174,692,000
Number of properties in portfolio			7
Percentage of partnership owned			49.00%
Unamortized investment	$ 448,000