ACQUISITIONS (Details 2) (USD $) In Thousands, unless otherwise specified	9 Months Ended			12 Months Ended
	Sep. 30, 2014 2014 Acquisitions	Sep. 30, 2014 2014 Acquisitions Triple-Net Leased Properties	Sep. 30, 2014 2014 Acquisitions Senior Living Operations	Dec. 31, 2013 2013 Acquisitions	Dec. 31, 2013 2013 Acquisitions Triple-Net Leased Properties	Dec. 31, 2013 2013 Acquisitions Senior Living Operations	Dec. 31, 2013 2013 Acquisitions MOB Operations
Business Acquisition [Line Items]
Land and improvements	$ 117,963	$ 25,771	$ 92,192	$ 100,908	$ 51,419	$ 45,566	$ 3,923
Buildings and improvements	1,365,279	275,984	1,089,295	1,521,596	803,227	579,577	138,792
Acquired lease intangibles	54,788	18,336	36,452	36,227	8,945	16,920	10,362
Other assets	12,387	0	12,387	8,345	3,285	2,607	2,453
Total assets acquired	1,550,417	320,091	1,230,326	1,667,076	866,876	644,670	155,530
Notes payable and other debt	228,150	0	228,150	41,436	36,300	5,136	0
Other liabilities	129,527	4,630	124,897	30,218	11,423	12,285	6,510
Total liabilities assumed	357,677	4,630	353,047	71,654	47,723	17,421	6,510
Noncontrolling interest assumed				11,785	10,113	0	1,672
Net assets acquired	1,192,740	315,461	877,279	1,583,637	809,040	627,249	147,348
Cash acquired	8,704	0	8,704	2,150	753	0	1,397
Total cash used	$ 1,184,036	$ 315,461	$ 868,575	$ 1,581,487	$ 808,287	$ 627,249	$ 145,951