v2.4.0.6

Accounting Policies (Details) (USD $) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2010 segment | Jun. 30, 2010 segment | Dec. 31, 2012 tranche segment | Dec. 31, 2011 | Dec. 31, 2010
Cash Equivalents |  |  |  |  |
Maximum term of maturity to classify investments as cash equivalents (in months) |  |  | 3 months |  |
Deferred Financing Costs |  |  |  |  |
Deferred financing costs, net of accumulated amortization |  |  | $ 42,551,000 | $ 26,669,000 |
Amortized costs included in interest expense |  |  | 10,500,000 | 17,800,000 | 17,800,000
Fair Values of Financial Instruments |  |  |  |  |
Number of foreign currency tranches reported at fair value |  |  | 2 |  |
Number of entity shares issued in exchange for redemption of OP Units |  |  | $ 0.7866 |  |
Revenue Recognition |  |  |  |  |
Straight-line rent receivables |  |  | 120,325,000 | 96,883,000 |
Term of resident lease agreements, minimum (in months) |  |  | 12 months |  |
Term of resident lease agreements, maximum (in months) |  |  | 18 months |  |
Notice period to cancel lease agreements by the resident (in days) |  |  | 30 days |  |
Segment Reporting |  |  |  |  |
Number of reportable business segments | 2 | 2 | 3 |  |
Business acquisition |  |  |  |  |
Tenant purchase option recorded, net |  |  | $ 432,500,000 | $ 644,000,000 |
Building |  |  |  |  |
Business acquisition |  |  |  |  |
Estimated remaining life (in years) |  |  | 35 years |  |
Lillibridge Acquisition |  |  |  |  |
Business acquisition |  |  |  |  |
Number of Medical office buildings | 96 |  |  |  |

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- Definition For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount to be paid per share that is classified as temporary equity by entity upon redemption. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 28 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2,3,4,5,6,7,8 -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. + Details
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