v2.4.0.6

Income Taxes (Details 3) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2011 Y | Dec. 31, 2010 property | Dec. 31, 2009
Tax effects of temporary differences and carryforwards included in the net deferred tax liabilities |  |  |
Property, primarily differences in depreciation and amortization, the tax basis of land assets and the treatment of interests and certain costs | $ (332,111,000) | $ (287,165,000) | $ (293,800,000)
Operating loss and interest deduction carryforwards | 343,843,000 | 103,733,000 | 86,014,000
Expense accruals and other | 11,511,000 | 3,093,000 | (58,000)
Valuation allowance | (281,954,000) | (60,994,000) | (45,821,000)
Net deferred tax liabilities | 258,711,000 | 241,333,000 | 253,665,000
Deferred Tax Assets, Net | 2,000,000 |  |
Increase (decrease) in net deferred tax liability | 17,400,000 | (12,300,000) |
Number of seniors housing communities noncontrolling interests acquired |  | 58 |
Period during which subject built-in gains tax (in years) | 10 |  |
NOL carryforward related to TRS entities | 240,000,000 |  |
NOL carryforward related to REIT | 690,000,000 |  |
NOL carryforward related to Lillibridge, TRS entities | 10,400,000 |  |
NOL carryforward related to Lillibridge, REIT entities | $ 16,200,000 |  |

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- Definition The amount as of the balance sheet date of the estimated future tax effects attributable to the difference between the tax basis of capital assets and the basis of capital assets computed in accordance with generally accepted accounting principles. The difference in basis, attributable to different capitalization of costs, depreciation, or amortization methodologies, will increase future taxable income when such basis difference is realized. Capital assets include but are not limited to assets such as land, real estate, leasehold improvements, machinery and equipment and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6969291&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 11 -Subparagraph d, e, f -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 + Details
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