Real Property Acquisitions and Development (Details 1) - USD ($)		6 Months Ended
		Jun. 30, 2015		Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Cash And Cash Equivalents At Carrying Value		$ 217,942,000		$ 207,354,000	$ 473,726,000	$ 158,780,000
Triple Net [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Land and land improvements		92,287,000	[1]	18,530,000
Buildings and improvements		744,515,000	[1]	230,126,000
Acquired lease intangibles	[1]	2,817,000
Restricted cash	[1]	6,000
Receivables and other assets	[1]	60,000
Total assets acquired		839,685,000	[1]	248,656,000
Accrued expenses and other liabilities	[1]	(1,845,000)
Total liabilities assumed	[1]	(1,845,000)
Noncontrolling interests		0
Non-cash acquisition related activity		(936,000)	[1]	(1,839,000)
Cash disbursed for acquisitions		836,904,000	[1]	246,817,000
Construction in progress additions		74,694,000	[1]	55,535,000
Less: Capitalized Interest		(3,303,000)	[1]	(2,332,000)
Less: Foreign currency translation		240,000	[1]	(116,000)
Cash disbursed for construction in progress		71,631,000	[1]	53,087,000
Capital improvements to existing properties		19,029,000	[1]	10,381,000
Total cash invested in real property		927,564,000	[1]	310,285,000
Triple Net [Member] | Preliminary [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Total cash invested in real property		727,673,000
Senior housing - operating [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Land and land improvements		94,294,000	[2]	3,546,000
Buildings and improvements		1,174,465,000	[2]	37,274,000
Acquired lease intangibles		71,089,000	[2]	5,569,000
Acquired Construction in Progress	[2]	0
Restricted cash		5,425,000	[2]	0
Receivables and other assets		23,645,000	[2]	33,000
Total assets acquired	[3]	1,368,918,000	[2]	46,422,000
Secured debt		(208,960,000)	[2]	(12,846,000)
Accrued expenses and other liabilities		(19,011,000)	[2]	(853,000)
Total liabilities assumed		(227,971,000)	[2]	(13,699,000)
Noncontrolling interests		(86,842,000)	[2]	0
Non-cash acquisition related activity		0	[2]	0
Cash disbursed for acquisitions		1,054,105,000	[2]	32,723,000
Construction in progress additions		19,926,000	[2]	2,348,000
Less: Capitalized Interest		(715,000)	[2]	(75,000)
Less: Foreign currency translation	[2]	(40,000)
Cash disbursed for construction in progress		19,171,000	[2]	2,273,000
Capital improvements to existing properties		32,766,000	[2]	32,171,000
Total cash invested in real property		1,106,042,000	[2]	67,167,000
Cash Acquired from Acquisition		3,390,000		245,000
Senior housing - operating [Member] | Preliminary [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Total cash invested in real property		1,344,831,000
Outpatient Medical [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Land and land improvements	[4]	737,000		1,655,000
Buildings and improvements	[4]	426,130,000		212,572,000
Acquired lease intangibles	[4]	19,371,000		1,525,000
Cash And Cash Equivalents At Carrying Value	[4]	4,373,000
Restricted cash				0
Receivables and other assets				249,000
Total assets acquired	[4]	450,611,000		216,001,000
Secured debt		(112,000,000)	[4]	0
Accrued expenses and other liabilities		(2,743,000)	[4]	(7,475,000)
Total liabilities assumed		(114,743,000)	[4]	(7,475,000)
Capital in excess of par	[4]	0
Noncontrolling interests	[4]	(68,535,000)
Non-cash acquisition related activity				0
Cash disbursed for acquisitions		267,333,000	[4]	208,526,000
Construction in progress additions		26,025,000	[4]	49,805,000
Less: Capitalized Interest		(428,000)	[4]	(898,000)
Less: Accruals	[5]	(1,921,000)	[4]	(9,584,000)
Cash disbursed for construction in progress		23,676,000	[4]	39,323,000
Capital improvements to existing properties		15,291,000	[4]	12,654,000
Total cash invested in real property		301,927,000	[4]	$ 260,503,000
Outpatient Medical [Member] | Preliminary [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Total cash invested in real property		$ 440,220,000

[1] (1) Includes acquisitions with an aggregate purchase price of $688,288,000 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 $1,344,831,000 for which the allocation of the purchase price consideration is preliminary and subject to change.

[3] (2) Excludes $3,390,000 and $245,000 of cash acquired during the six months ended June 30, 2015 and 2014, respectively.

[4] (1) Includes acquisitions with an aggregate purchase price of $440,220,000 for which the allocation of the purchase price consideration is preliminary and subject to change.

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