Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2011	Dec. 31, 2010
Accounting Policies (Textuals) [Abstract]
Straight line rent receivable	$ 90.0	$ 86.3
Notice period to cancel lease agreements by the resident	30 days
Term of resident lease agreements, Minimum	12 months
Term of resident lease agreements, Maximum	18 months
Net book value of fixtures and equipment	$ 97.0	$ 34.5
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Minimum estimated useful life	20
Maximum estimated useful life	50
Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Minimum estimated useful life	3
Maximum estimated useful life	10

The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property, by the lessor or lessee, respectively. Such receivable should be reduced by allowances attributable to, for instance, credit risk associated with a lessee.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Technical Bulletin (FTB)
-Number 85-3
-Paragraph 2

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 19
-Subparagraph b

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The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land and improvements, buildings, and production equipment.

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The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land and improvements, buildings, and production equipment.

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Accounting Policies.

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Net book value of fixtures and equipment.

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Notice Period to Cancel Lease Agreements By Resident in Days.

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Term of resident lease agreements maximum.

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Term of resident lease agreements minimum.

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