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Real Estate Properties (Details 2) (USD $) In Thousands, unless otherwise specified	1 Months Ended	2 Months Ended	12 Months Ended					12 Months Ended		12 Months Ended		12 Months Ended		1 Months Ended				12 Months Ended	2 Months Ended	12 Months Ended		1 Months Ended		2 Months Ended	1 Months Ended			12 Months Ended	1 Months Ended											2 Months Ended		1 Months Ended				12 Months Ended	1 Months Ended	2 Months Ended		12 Months Ended				1 Months Ended	3 Months Ended	1 Months Ended				12 Months Ended	1 Months Ended		3 Months Ended		1 Months Ended
	Nov. 30, 2009 Property	Jun. 30, 2011 Property	Dec. 31, 2011 Property sqft state	Dec. 31, 2010 Property	Dec. 31, 2009 Property	Dec. 31, 2011 Above market lease Y	Dec. 31, 2010 Above market lease	Dec. 31, 2011 In-place lease intangibles Y	Dec. 31, 2010 In-place lease intangibles	Dec. 31, 2011 Below market lease Y	Dec. 31, 2010 Below market lease	Dec. 31, 2011 Five Star Property	Dec. 31, 2010 Five Star	Feb. 29, 2012 Senior living communities Five Star Property unit	Dec. 31, 2011 Senior living communities Five Star Property unit	Dec. 31, 2011 Acquisition	Dec. 31, 2010 Acquisition	Dec. 31, 2011 Acquisition Senior living communities Property	Jun. 30, 2011 Acquisition MOB Property	Dec. 31, 2011 Acquisition MOB Property	Dec. 31, 2010 Acquisition MOB Property	Sep. 30, 2011 Acquisition MOB CommonWealth REIT (CWH) Property sqft	Jan. 31, 2011 Acquisition MOB CommonWealth REIT (CWH) Property sqft	Dec. 31, 2010 Acquisition MOB CommonWealth REIT (CWH) sqft Property	Aug. 31, 2011 Acquisition Five States, Southeast Senior living communities Property	Jul. 31, 2011 Acquisition Five States, Southeast Senior living communities Property	Jun. 30, 2011 Acquisition Five States, Southeast Senior living communities Property	Dec. 31, 2011 Acquisition Five States, Southeast Senior living communities Five Star Property	Apr. 30, 2010 Acquisition Colorado MOB Property sqft	Oct. 31, 2010 Acquisition Texas MOB sqft Property	Jun. 30, 2010 Acquisition Texas MOB sqft Property	May 31, 2011 Acquisition Illinois Senior living communities Property unit	May 31, 2011 Acquisition Illinois Senior living communities Five Star Lease No. 1 Five Star	Sep. 30, 2010 Acquisition Illinois MOB Property sqft	Sep. 30, 2010 Acquisition Georgia MOB sqft Property	May 31, 2011 Acquisition Minnesota MOB sqft Property	Jan. 31, 2011 Acquisition Minnesota MOB sqft Property	Jul. 31, 2011 Acquisition Florida MOB Property sqft	Jun. 30, 2011 Acquisition Florida MOB sqft Property	Jul. 31, 2011 Acquisition Florida MOB Property	Jun. 30, 2011 Acquisition Florida MOB Property	Aug. 31, 2011 Acquisition Florida Land acre	Nov. 30, 2011 Acquisition Virginia MOB Property sqft	Dec. 31, 2011 Acquisition Six states Senior living communities Property	Dec. 31, 2011 Acquisition Indiana MOB Property sqft	Dec. 31, 2011 Sale	May 31, 2011 Sale Five Star	Jun. 30, 2011 Sale Five Star	Dec. 31, 2011 Sale Senior living communities Property	Dec. 31, 2011 Sale MOB Property	Dec. 31, 2011 Sale Skilled nursing facilities Property	Dec. 31, 2010 Sale Skilled nursing facilities Property	Dec. 31, 2011 Sale Assisted living community Property	Aug. 31, 2010 Sale Nebraska Skilled nursing facilities Property unit	Feb. 29, 2012 Agreement to acquire agreement sqft	Sep. 30, 2011 Agreement to acquire MOB CommonWealth REIT (CWH) sqft Property	Nov. 30, 2010 Agreement to acquire MOB CommonWealth REIT (CWH) Property sqft state	Mar. 31, 2011 Agreement to acquire Five States, Southeast Senior living communities Property state	May 31, 2011 Agreement to acquire Five States, Southeast Senior living communities Five Star Property	Dec. 31, 2011 Agreement to acquire Five States, Southeast Senior living communities Five Star Property	Jul. 31, 2011 Agreement to acquire Six states Senior living communities Property unit state	Sep. 30, 2011 Agreement to acquire Eight states MOB CommonWealth REIT (CWH) state	Feb. 29, 2012 Agreement to acquire Missouri Senior living communities Property unit	Feb. 29, 2012 Agreement to acquire Georgia and Hawaii MOB Property	Nov. 30, 2010 Agreement to sell Georgia Senior living communities unit	Nov. 30, 2010 Agreement to sell Georgia Skilled nursing facilities Property
Real estate properties
Number of states in which properties are located			38																																																						12	5			6	8
Aggregate purchase price of properties acquired, excluding closing costs														$ 11,300	$ 11,300					$ 991,618	$ 433,955	$ 167,000	$ 95,870	$ 374,130	$ 17,158	$ 44,671	$ 196,594		$ 4,450	$ 15,000	$ 12,175	$ 7,500		$ 18,400	$ 9,800	$ 7,200	$ 14,150	$ 5,200	$ 14,550			$ 4,000	$ 11,425	$ 379,000	$ 21,000										$ 144,750	$ 167,000	$ 470,000	$ 304,000			$ 478,000
Number of properties acquired or agreed to be acquired														1	1			28	4	28	26	13	6	21	1	3	14	18	1	1	1	1		1	1	1	1	1	3	4	3		2	8	1											13	27	20			9		1	4
Mortgage loans assumed in real estate acquisition			217,317	2,458																					12,459	12,757	48,062		2,458									3,653					9,633	130,752
Mortgage loans assumed in real estate acquisition, interest rate (as a percent)																													6.73%
Number of acquisition agreements																																																							5
Number of properties agreed to be acquired, or agreed to be acquired, referred as leased properties																												5																															5	2
Number of properties acquired, referred as managed properties																												13
Number of real estate properties leased															188
Number of units														92	57																	73																						196							2,226		87		329
Initial lease rent												195,228																					608
Area of real estate properties acquired (in square feet)																						1,300,000	737,000	2,100,000					14,695	58,605	55,800			64,860	38,030	49,809	84,474	32,476	125,990				45,645		94,238										514,409	1,300,000	2,800,000
Intangible lease assets recorded			130,153	78,117		39,075	24,499	91,078	53,618							52,210	27,837						9,217	18,840					775	1,867	1,783			3,144	1,428	1,403	2,722		953		953		1,898		4,867											31,150
Intangible lease liabilities recorded			25,487	21,735												3,770	10,206						1,600	7,806					168	1,561	506				164	51			200		200															1,919
Amortization expenses included in depreciation and amortization			11,318	4,468	3,669
Reductions in rental income on capitalized above market and below market lease due to amortization			93	(891)	(1,006)
Accumulated amortization on lease assets						9,612	5,494	20,306	9,030	7,709	3,496
Weighted average amortization period (in years)						6.9		6.9		8.1
Future amortization of intangible lease assets and liabilities
2012			16,710
2013			15,243
2014			11,885
2015			10,400
2016			8,979
Thereafter			19,240
Number of properties sold or agreed to be sold	1	2																																																2	4	4	1	4												3
Aggregate sale price																																														39,460						1,450		1,450											18,000
Gain on sale of properties			21,315	109	397																																									21,315								109
Impairment of asset charges recorded			1,990	5,965	15,530
Number of properties impaired			4	7	11
Real estate improvements purchased												33,269	31,894
Increase or decrease in annual lease rent payable												2,665	2,555															6,923																			(72)	(1,792)
Number of properties classified as held for sale	1		2									2																																					1	1
Real estate properties, held for sale												1,715	3,603
Area of land (in acres)																																										47
Leases Committed Expenditure			6,133
Square Footage of Real Estate Property Leased			575,000
Lease Committed but Unspent Tenat Related Obligations			$ 6,912

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- Definition

Represents the area of the real estate property.

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- Definition

Represents the increase or decrease in rental income associated with capitalized above market and below market lease due to amortization.

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Represents the increase or decrease on the annual rent the lessee is obligated to pay on an operating lease.

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Represents the number of agreements entered into by the entity to acquire real estate properties.

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

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Represents the amount of improvements to real estate properties made by lessees and purchased by the entity.

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Represents the intangible lease assets recorded as part of the real estate acquisition.

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

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The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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The amount of amortization expense expected to be recognized for the remainder of the finite-lived intangible asset useful life after the fifth succeeding fiscal year.

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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.

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The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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-Number 95

-Paragraph 32

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586



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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 210

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