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Real Estate Properties - Discontinued Operations and Properties Held for Sale (Details) $ in Thousands	1 Months Ended							12 Months Ended
	Dec. 31, 2015 USD ($) ft² community building property item	Sep. 30, 2015 community	Aug. 31, 2015 USD ($) community	Jul. 31, 2015 USD ($) community	May. 31, 2015 community item	Apr. 30, 2015 USD ($) building property	Feb. 28, 2015 USD ($) community	Dec. 31, 2015 USD ($) ft² community building property item	Dec. 31, 2014 USD ($) ft² community building property item	Dec. 31, 2013 USD ($)
Real estate properties
Gain on sale of properties									$ 5,453	$ 37,392
Impairment of assets								$ 194	(10)	7,989
Number of Buildings Held For Sale | building	1							1
Number of properties classified as held for sale | property	1							1
Area of real estate properties leased (in square feet) | ft²								1,032,000
(Loss) income from discontinued operations								$ (350)	1,362	5,043
Leases Committed Expenditure								20,314
Lease Committed but Unspent Tenant Related Obligations								16,671
Discontinued Operations, Held-for-sale
Real estate properties
Impairment of assets								$ 796
Number of properties classified as held for sale | item	1							1
Discontinued Operations, Held-for-sale or Disposed of by Sale
Real estate properties
Rental income								$ 56	3,949	9,451
Property operating expenses								(406)	(2,587)	(3,609)
Depreciation and amortization										(799)
(Loss) income from discontinued operations								(350)	1,362	$ 5,043
Other Assets | Discontinued Operations, Held-for-sale
Real estate properties
Assets held for sale	$ 5,356							$ 5,356
Senior Living Communities
Real estate properties
Impairment of assets									$ 4,377
Number of communities | community					1			19
Number of living units | item					838
Senior Living Communities | Discontinued Operations, Disposed of by Sale
Real estate properties
Number of properties sold | community	1		1	1			1		6
Sale price of property sold and agreed to be sold	$ 21		$ 850	$ 155			$ 250		$ 15,650
Gain on sale of properties									$ 5,452
Senior Living Communities | Discontinued Operations, Held-for-sale
Real estate properties
Number of living units | item	140							140	312
Number of properties classified as held for sale | community									4
MOBs
Real estate properties
Number of communities | community									2
Number of Buildings Held For Sale | building	7							7	7
Number of Real Estate Properties, Impaired | item									4
Number of properties classified as held for sale | property	4							4
MOBs | Discontinued Operations, Disposed of by Sale
Real estate properties
Number of properties sold | property						1			3
Number of buildings sold | building						4			3
Sale price of property sold and agreed to be sold						$ 1,500			$ 11,675
MOBs | Discontinued Operations, Held-for-sale
Real estate properties
Area Of Real Estate Property Held For Sale | ft²									323,541
Number of properties classified as held for sale | item									1
Acquisition | Senior Living Communities
Real estate properties
Number of communities | community		1			37				2
Number of living units | item	3,563							3,563	228
Acquisition | MOBs
Real estate properties
Area of real estate properties (in square feet) | ft²	2,170,000							2,170,000	1,776,000

X

- Definition

Represents the area of a real estate property, held for sale.

+ References

No definition available.

+ Details

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X

- Definition

Amount of expense incurred and directly related to generating revenue from leased and rented property or equipment that part of disposal group.

+ References

No definition available.

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Balance Type:	debit
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X

- Definition

Amount of committed but unspent tenant related obligations based on executed lease.

+ References

No definition available.

+ Details

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- Definition

Represents the amount of expenditure committed by entity relating to leases.

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- Definition

The number of buildings owned by the entity, which are classified as held for sale as of the balance sheet date.

+ References

No definition available.

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- Definition

This element represents the number of buildings sold by the entity.

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- Definition

Represents the number of communities.

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- Definition

This element represents the number of properties sold or agreed to be sold by the entity.

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No definition available.

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- Definition

The number of real estate properties owned by the entity, which are classified as held for sale as of the balance sheet date.

+ References

No definition available.

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Represents the number of real estate properties impaired.

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X

- Definition

This element represents the aggregate sales price excluding closing costs, of real estate properties sold by the entity during the period.

+ References

No definition available.

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- Definition

Represents the area of the real estate property subject to an operating lease.

+ References

No definition available.

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Area of a real estate property.

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X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-SubTopic 10
-Section 45
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- Definition

Amount after tax of income (loss) from operations classified as a discontinued operation. Excludes gain (loss) on disposal and provision for gain (loss) until disposal.

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- Definition

Amount of depreciation and amortization expense attributable to disposal group, including, but not limited to, discontinued operation.

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- Definition

Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

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X

- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

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- Definition

The number of units in a real estate property owned as of the balance sheet date.

+ References

No definition available.

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- Definition

Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.

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-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(f))
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- Definition

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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No definition available.

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