Real Property Acquisitions and Development (Details 1) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2016		Sep. 30, 2015
Triple Net [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Land and land improvements		$ 21,713	[1]	$ 64,655
Buildings and improvements		220,274	[1]	727,946
Acquired lease intangibles		2,876	[1]	3,888
Restricted cash		0	[1]	6
Receivables and other assets		0	[1]	60
Total assets acquired		244,863	[1]	796,555
Accrued expenses and other liabilities		(2,145)	[1]	(2,447)
Total liabilities assumed		(2,145)	[1]	(2,447)
Noncontrolling interests		(3,162)	[1]	0
Non-cash acquisition related activity	[2]	(51,733)	[1]	(2,780)
Cash disbursed for acquisitions		187,823	[1]	791,328
Construction in progress additions		133,611	[1]	96,403
Less: Capitalized Interest		(6,263)	[1]	(4,453)
Less: Foreign currency translation		(3,179)	[1]	73
Cash disbursed for construction in progress		124,169	[1]	92,023
Capital improvements to existing properties		21,447	[1]	35,042
Total cash invested in real property		333,439	[1]	918,393
Non Cash Acquisition Financed As Real Estate Loan Receivable		45,044
Non cash acquisition financed as equity investments		6,630
Triple Net [Member] | Preliminary [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Total cash invested in real property		183,547
Senior housing - operating [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Land and land improvements		122,649	[3]	98,444
Buildings and improvements		1,108,195	[3]	1,229,017
Acquired lease intangibles		90,771	[3]	74,091
Restricted cash		137	[3]	5,567
Receivables and other assets		2,179	[3]	23,928
Total assets acquired	[4]	1,323,931	[3]	1,431,047
Secured debt		(49,381)	[3]	(234,597)
Accrued expenses and other liabilities		(12,328)	[3]	(19,016)
Total liabilities assumed		(61,709)	[3]	(253,613)
Noncontrolling interests		(1,089)	[3]	(86,842)
Non-cash acquisition related activity	[5]	(17,477)		0
Cash disbursed for acquisitions		1,243,656	[3]	1,090,592
Construction in progress additions		139,160	[3]	39,493
Less: Capitalized Interest		(3,923)	[3]	(1,116)
Less: Foreign currency translation		(5,953)	[3]	(1,345)
Cash disbursed for construction in progress		129,284	[3]	37,032
Capital improvements to existing properties		84,444	[3]	61,911
Total cash invested in real property		1,457,384	[3]	1,189,535
Cash Acquired from Acquisition		135		3,390
Senior housing - operating [Member] | Preliminary [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Total cash invested in real property		1,194,746
Outpatient Medical [Member]
Estimated Fair Value of Allocated Purchase Price of Asset and Liabilities
Land and land improvements		1,466		47,756
Buildings and improvements		27,272		723,574
Acquired lease intangibles		4,592		19,373
Total assets acquired	[6]	33,330		790,703
Secured debt		0		(112,000)
Accrued expenses and other liabilities		(1,670)		(2,743)
Total liabilities assumed		(1,670)		(114,743)
Noncontrolling interests		0		(68,535)
Non-cash acquisition related activity	[7]	(15,013)		0
Cash disbursed for acquisitions		16,647		607,425
Construction in progress additions		81,843		38,919
Less: Capitalized Interest		(2,588)		(742)
Less: Accruals	[8]	(7,336)		(1,921)
Cash disbursed for construction in progress		71,919		36,256
Capital improvements to existing properties		35,309		25,687
Total cash invested in real property		123,875		669,368
Cash Acquired from Acquisition		$ 0		$ 4,372

[1] (1) Includes acquisitions with an aggregate purchase price of $183,547,000 for which the allocation of the purchase price consideration is preliminary and subject to change.

[2] (2) For the nine months ended September 30, 2016, $45,044,000 relates to the acquisition of assets previously financed as real estate loans receivable and $6,630,000 previously financed as equity investments.

[3] (1) Includes acquisitions with an aggregate purchase price of $1,194,765,000 for which the allocation of the purchase price consideration is preliminary and subject to change.

[4] (2) Excludes $135,000 and $3,390,000 of cash acquired during the nine months ended September 30, 2016 and 2015, respectively.

[5] (3) Relates to the acquisition of assets previously financed as equity investments.

[6] (1) Excludes $0 and $4,372,000 of cash acquired during the nine months ended September 30, 2016 and 2015, respectively.

[7] (2) Relates to an acquisition of assets previously financed as a real estate loan. Refer to Note 6 for additional information.

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