Subsequent Events	12 Months Ended
Dec. 31, 2011
Subsequent Events [Abstract]
Subsequent Events	21. Subsequent Events Chartwell. On February 15, 2012, the company announced it will partner with Chartwell Seniors Housing Real Estate Investment Trust to own and operate a portfolio of 42 seniors housing and care communities located in Canada. The portfolio is being acquired for $925 million. This transaction will be structured under RIDEA with 39 facilities owned 50% by us and 50% by Chartwell, and three facilities wholly owned by us. Our $503 million investment will be through a combination of cash and the pro rata assumption of secured debt. Chartwell will provide management services to the communities under an incentive-based management contract.

Describes disclosed significant events or transactions that occurred after the balance sheet date, but before the issuance of the financial statements. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, losses resulting from fire or flood, losses on receivables, significant realized and unrealized gains and losses that result from changes in quoted market prices of securities, declines in market prices of inventory, changes in authorized or issued debt (SEC), significant foreign exchange rate changes, substantial loans to insiders or affiliates, significant long-term investments, and substantial dividends not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 11

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