ACQUISITIONS OF REAL ESTATE PROPERTY (Details 3) (NHP, USD $)	1 Months Ended
	Jul. 31, 2011 property	Jul. 02, 2011
Business acquisition
Number of properties acquired	643
Fair values of the assets acquired and liabilities assumed at the date of acquisition
Land and improvements		$ 701,154,000
Buildings and improvements		6,147,737,000
Acquired lease intangibles		493,125,000
Investment in unconsolidated entities		93,553,000
Other assets		815,968,000
Total assets acquired		8,251,537,000
Notes payable and other debt		1,882,752,000
Other liabilities		720,420,000
Total liabilities assumed		2,603,172,000
Redeemable OP unitholder interests assumed		100,888,000
Noncontrolling interest included in purchase price of acquisition		76,658,000
Net assets acquired		5,470,819,000
Cash acquired		29,205,000
Equity issued		5,365,819,000
Total cash used		75,795,000
Goodwill included in other assets		399,000,000
Triple-Net Leased Properties
Fair values of the assets acquired and liabilities assumed at the date of acquisition
Goodwill included in other assets		338,500,000
MOB Operations
Fair values of the assets acquired and liabilities assumed at the date of acquisition
Goodwill included in other assets		$ 60,500,000