Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13537-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13531-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

+ Details

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Period Type:	instant

- Definition

The number of states the entity operates in as of the balance sheet date.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Annual base rent of triple-net properties covered by ten bundles.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Concentration of Credit Risk.

+ Details

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- Definition

Gross book value of real estate investments.

+ Details

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Period Type:	instant

- Definition

Gross book value of real estate investments managed operated.

+ Details

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- Definition

Minimum number of hospitals in the bundle.

+ Details

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- Definition

Minimum number of properties in each bundle.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of assets covered by six bundles.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of bundles in the second renewal period.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Number of bundles set to expire

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Number of provinces in which entity operates.

+ Details

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- Definition

Number Of Real Estate Properties for which we pay an annual management fee pursuant to long-term management agreements which provide for comprehensive property management and accounting services.

+ Details

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Period Type:	instant

- Definition

Number of renewals during lease term.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Number of states accounting for more than ten percent of total revenues.

+ Details

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Balance Type:	na
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- Definition

Number of triple-net properties covered by ten bundles.

+ Details

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Balance Type:	na
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- Definition

Percentage of net operating income derived from lease agreements.

+ Details

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- Definition

Percentage of total revenues derived by third party.

+ Details

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Period Type:	duration

- Definition

Rent of assets covered by six bundles.

+ Details

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Balance Type:	debit
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- Definition

Successive automatic renewal period.

+ Details

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- Definition

Term of agreement.

+ Details

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- Definition

Term of lease.

+ Details

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- Definition

Term of lease renewal.

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Concentration of Credit Risk (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 Hospital Renewal Property Bundle	Apr. 30, 2012
Concentration of Credit Risk (Textuals) [Abstract]
Number of states	46		46
Revenue concentration risk percentage	10.00%		10.00%
Number of Canadian provinces	2		2
Number of states accounting for more than 10% of total revenues	1		1
Senior Housing Communities [Member]
Concentration of Credit Risk [Line Items]
Gross book value of real estate investments	66.20%		66.20%
Number of seniors housing communities under long-term management agreements	196		196
Hospitals Medical Office Building And Other [Member]
Concentration of Credit Risk [Line Items]
Gross book value of real estate investments	33.80%		33.80%
Sunrise [Member]
Concentration of Credit Risk [Line Items]
Gross book value of real estate investments managed	14.40%		14.40%
Term of agreement			30 years
Atria [Member]
Concentration of Credit Risk [Line Items]
Gross book value of real estate investments managed	18.70%		18.70%
Term of agreement			10 years
Successive automatic renewal period			10 years
Brookdale Senior Living [Member]
Concentration of Credit Risk [Line Items]
Gross book value of real estate investments managed	13.00%		13.00%
Percentage of total revenues derived by third party	8.10%	11.30%
Percentage of net operating income derived from lease agreements	13.10%	16.80%
Kindred [Member]
Concentration of Credit Risk [Line Items]
Gross book value of real estate investments managed	5.00%		5.00%
Percentage of total revenues derived by third party	11.30%	23.50%
Percentage of net operating income derived from lease agreements	18.30%	34.80%
Number of renewals during lease term			3
Term of lease renewal			5 years
Number of bundles set to expire			10
Number of triple-net properties covered by ten bundles			89
Minimum Number of properties in each bundle			6
Minimum number of hospitals in the bundle			1
Annual base rent of triple-net properties covered by ten bundles				$ 122.8
Number of assets covered by six bundles			53
Rent of assets covered by six bundles			$ 66
Number of bundles in the second renewal period			6
Kindred [Member] \| Minimum [Member]
Concentration of Credit Risk [Line Items]
Term of lease			10 years
Kindred [Member] \| Maximum [Member]
Concentration of Credit Risk [Line Items]
Term of lease			15 years