v2.4.0.6

Income Taxes (Details 3) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
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 | $ (310,756,000) |  | $ (332,111,000) |  | $ (287,165,000) |
Operating loss and interest deduction carryforwards | 366,590,000 |  | 343,843,000 |  | 103,733,000 |
Expense accruals and other | 13,984,000 |  | 11,511,000 |  | 3,093,000 |
Valuation allowance | (326,837,000) |  | (281,954,000) |  | (60,994,000) |
Net deferred tax liabilities | 257,019,000 | [1] | 258,711,000 | [1] | 241,333,000 | [1]
Deferred tax assets | 2,700,000 |  | 2,000,000 |  |  |
Increase (decrease) in net deferred tax liability | (1,700,000) |  | 17,400,000 |  |  |
Net difference between tax bases and the reported amount of REIT assets and liabilities | 5,100,000,000 |  | 5,300,000,000 |  |  |
Period during which subject built-in gains tax (in years) | 10 years |  |  |  |  |
NOL carryforward related to TRS entities | 289,000,000 |  |  |  |  |
NOL carryforward related to REIT | 692,000,000 |  |  |  |  |
NHP |  |  |  |  |  |
Business acquisition |  |  |  |  |  |
Net operating loss, carryforward |  |  | 38,700,000 |  |  |
Atria Senior Living Acquisition [Member] |  |  |  |  |  |
Business acquisition |  |  |  |  |  |
Net operating loss, carryforward |  |  | $ 546,800,000 |  |  |
[1] | 2012 and 2011 includes approximately $2.7 million and $2.0 million, respectively, of deferred tax assets included in other assets on our Consolidated Balance Sheets.

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