DISPOSITIONS (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014 property	Sep. 30, 2013	Sep. 30, 2014 property	Sep. 30, 2013	Dec. 31, 2013 property
Significant Acquisitions and Disposals
Properties classified as held for sale	48		48		19
Assets held for sale	$ 200,350,000		$ 200,350,000		$ 155,340,000
Liabilities of assets held-for-sale	51,433,000		51,433,000		64,500,000
Impairment of real estate			17,200,000	38,100,000
Impairment of long-lived assets to be disposed of			1,500,000	36,700,000
Revenues:
Rental income	261,000	3,672,000	4,269,000	11,557,000
Resident fees and services	0	0	0	759,000
Interest and other income	0	0	750,000	0
Total Revenues	261,000	3,672,000	5,019,000	12,316,000
Expenses:
Interest	281,000	1,235,000	1,462,000	4,389,000
Depreciation and amortization	12,000	11,354,000	1,540,000	45,292,000
Property-level operating expenses	123,000	310,000	403,000	1,692,000
General, administrative and professional expenses	0	0	0	3,000
Gain on extinguishment of debt, net	0	0	0	(153,000)
Other	63,000	(7,000)	309,000	(502,000)
Total expenses	479,000	12,892,000	3,714,000	50,721,000
(Loss) income before (loss) gain on real estate dispositions	(218,000)	(9,220,000)	1,305,000	(38,405,000)
(Loss) gain on real estate dispositions, net	(41,000)	46,000	1,212,000	2,241,000
Discontinued operations	(259,000)	(9,174,000)	2,517,000	(36,164,000)
Triple-Net Leased Properties
Significant Acquisitions and Disposals
Properties classified as held for sale	10		10		15
Assets held for sale	17,307,000		17,307,000		125,981,000
Liabilities of assets held-for-sale	794,000		794,000		50,456,000
Senior Living Operations
Significant Acquisitions and Disposals
Properties classified as held for sale	2		2
Assets held for sale	3,709,000		3,709,000
Liabilities of assets held-for-sale	194,000		194,000
MOB Operations
Significant Acquisitions and Disposals
Properties classified as held for sale	36		36		4
Assets held for sale	179,334,000		179,334,000		29,359,000
Liabilities of assets held-for-sale	50,445,000		50,445,000		14,044,000
MOB Operations | Medical Office Buildings
Significant Acquisitions and Disposals
Properties classified as held for sale	34		34
Aggregate NOI			8,700,000	10,600,000
2014 Dispositions
Significant Acquisitions and Disposals
Proceeds from disposition of assets, including termination fees			112,700,000
Gain (loss) on disposition of assets			19,900,000
Expenses:
(Loss) gain on real estate dispositions, net			1,500,000
2014 Dispositions | Triple-Net Leased Properties
Significant Acquisitions and Disposals
Number of real estate properties sold			15
2014 Dispositions | MOB Operations | Medical Office Buildings
Significant Acquisitions and Disposals
Number of real estate properties sold			4
2013 Dispositions
Significant Acquisitions and Disposals
Proceeds from disposition of assets, including termination fees				28,700,000
Lease Termination Fees				300,000
Expenses:
(Loss) gain on real estate dispositions, net				$ 2,500,000
2013 Dispositions | Triple-Net Leased Properties
Significant Acquisitions and Disposals
Number of real estate properties sold				16
2013 Dispositions | Senior Living Operations | Seniors Housing Communities
Significant Acquisitions and Disposals
Number of real estate properties sold				1
2013 Dispositions | MOB Operations | Medical Office Buildings
Significant Acquisitions and Disposals
Number of real estate properties sold				2
Discontinued Operations [Member] | Triple-Net Leased Properties
Significant Acquisitions and Disposals
Properties classified as held for sale	3		3
Discontinued Operations [Member] | MOB Operations
Significant Acquisitions and Disposals
Properties classified as held for sale	2		2