PROPERTIES - 2009 - 2010 Acquisitions - 143 Facility CapitalSource Acquisitions - First Closing (Narrative) (Detail 9) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended							1 Months Ended	12 Months Ended						1 Months Ended
	Dec. 31, 2010	Dec. 31, 2012 Operator State	Jun. 29, 2010 143 Facility CapitalSource Acquisitions Property	Dec. 22, 2009 143 Facility CapitalSource Acquisitions Property	Jun. 09, 2010 143 Facility CapitalSource Acquisitions Long-term care facilities Property	Dec. 22, 2009 143 Facility CapitalSource Acquisitions Long-term care facilities Property	Nov. 30, 2009 143 Facility CapitalSource Acquisitions Long-term care facilities Property	Dec. 22, 2009 143 Facility CapitalSource Acquisitions First Closing Operator State Contract Property Bed	Dec. 31, 2012 143 Facility CapitalSource Acquisitions First Closing	Dec. 31, 2011 143 Facility CapitalSource Acquisitions First Closing	Dec. 31, 2010 143 Facility CapitalSource Acquisitions First Closing	Dec. 31, 2010 143 Facility CapitalSource Acquisitions First Closing Land	Dec. 31, 2010 143 Facility CapitalSource Acquisitions First Closing Buildings and Site Improvements	Dec. 31, 2010 143 Facility CapitalSource Acquisitions First Closing Furniture and fixtures	Dec. 22, 2009 143 Facility CapitalSource Acquisitions First Closing Long-term care facilities Property	Dec. 31, 2011 143 Facility CapitalSource Acquisitions First Closing Long-term care facilities
Real Estate Properties [Line Items]
Number of facilities under agreements to purchase			40	40			80	40							40
Number of facilities under option to purchase					63	63	63								63
Business acquisition, purchase price															$ 271.4
Option to purchase subsidiaries															25.0
Cash paid for acquisition															184.2
Issuance of common stock for acquisitions, shares	995,000														2,714,959
Common stock issued for acquisition, value															52.8
Assumption of debt indebtedness for acquisition																59.4
Interest rate of assumed debt																6.80%
Number of operating beds								5,264
Number of states		34						12
Number of in-place triple net leases								15
Number of operators		46						12
Annualized lease revenue								31
Business acquisition purchase price allocation											282.0	22.5	241.9	17.6
Business acquisition purchase price allocation to in-place below market leases assumed								19.8
Business acquisition purchase price allocation to in-place above market leases assumed								9.5
Net amortization of below market leases									$ 1.2	$ 1.3	$ 1.4