Real Property Acquisitions and Development (Details 1) (USD $)	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
Senior housing - triple net [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Land and land improvements	$ 18,530,000	[1]	$ 8,533,000
Buildings and improvements	230,126,000	[1]	47,993,000
Total assets acquired	248,656,000	[1]	56,526,000
Non-cash acquisition related activity	(1,839,000)	[1]	0
Cash disbursed for acquisitions	246,817,000	[1]	56,526,000
Construction in progress additions	55,535,000	[1]	58,799,000
Less: Capitalized Interest	(2,332,000)	[1]	(2,208,000)
Less: Foreign currency translation	(116,000)	[1]	0
Cash disbursed for construction in progress	53,087,000	[1]	56,591,000
Capital improvements to existing properties	9,863,000	[1]	18,302,000
Total cash invested in real property	309,767,000	[1]	131,419,000
Senior housing - triple net [Member] | Preliminary [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Total cash invested in real property	116,134,000
Senior housing - operating [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Land and land improvements	3,546,000	[2]	337,066,000
Buildings and improvements	37,274,000	[2]	3,069,192,000
Acquired lease intangibles	5,569,000	[2]	263,740,000
Restricted cash	0	[2]	22,863,000
Receivables and other assets	33,000	[2]	76,286,000
Total assets acquired	46,422,000	[2],[3]	3,769,147,000	[3]
Secured debt	(12,846,000)	[2]	(556,413,000)
Accrued expenses and other liabilities	(853,000)	[2]	(51,356,000)
Total liabilities assumed	(13,699,000)	[2]	(607,769,000)
Noncontrolling interests	0	[2]	(229,966,000)
Non-cash acquisition related activity	0	[2]	(555,562,000)	[4]
Cash disbursed for acquisitions	32,723,000	[2]	2,375,850,000
Construction in progress additions	2,348,000	[2]	472,000
Less: Capitalized Interest	(75,000)	[2]	(6,000)
Cash disbursed for construction in progress	2,273,000	[2]	466,000
Capital improvements to existing properties	32,171,000	[2]	21,474,000
Total cash invested in real property	67,167,000	[2]	2,397,790,000
Cash Acquired from Acquisition	245,000	[2]	60,590,000
Senior housing - operating [Member] | Preliminary [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Total cash invested in real property	23,922,000
Medical facilities [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Land and land improvements	1,655,000	[5]	0
Buildings and improvements	212,572,000	[5]	0
Acquired lease intangibles	1,525,000	[5]	0
Receivables and other assets	249,000	[5]	0
Total assets acquired	216,001,000	[5]	0
Accrued expenses and other liabilities	(7,475,000)	[5]	0
Total liabilities assumed	(7,475,000)	[5]	0
Cash disbursed for acquisitions	208,526,000	[5]	0
Construction in progress additions	50,323,000	[5]	60,925,000
Less: Capitalized Interest	(898,000)	[5]	(778,000)
Less: Accruals	(9,584,000)	[5],[6]	2,129,000	[6]
Cash disbursed for construction in progress	39,841,000	[5]	62,276,000
Capital improvements to existing properties	12,654,000	[5]	8,704,000
Total cash invested in real property	261,021,000	[5]	70,980,000
Medical facilities [Member] | Preliminary [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Total cash invested in real property	$ 200,295,000

[1] (1) Includes acquisitions with an aggregate purchase price of $116,134,000 for which the allocation of the purchase price consideration is preliminary and subject to change.

[2] (1) Includes acquisitions with an aggregate purchase price of $23,922,000 for which the allocation of the purchase price consideration is preliminary and subject to change.

[3] (2) Excludes $245,000 and $60,590,000 of cash acquired during the six months ended June 30, 2014 and 2013, respectively.

[4] (3) Represents Sunrise loan and noncontrolling interests acquisitions.

[5] (1) Includes acquisitions with an aggregate purchase price of $200,295,000 for which the allocation of the purchase price consideration is preliminary and subject to change.

[6] (2) Represents non-cash accruals for amounts to be paid in future periods relating to properties that converted in the periods noted above.