v2.4.0.6

Accounting Policies (Details 2) (USD $) | 3 Months Ended | 12 Months Ended |  |  | 1 Months Ended |  |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2008 | Dec. 31, 2011 Nonconvertible debt | Nov. 30, 2011 3 7/8 % Convertible Senior Notes due 2011 upon maturity | Dec. 31, 2011 3 7/8 % Convertible Senior Notes due 2011 upon maturity | Nov. 15, 2011 3 7/8 % Convertible Senior Notes due 2011 upon maturity | Dec. 31, 2010 3 7/8 % Convertible Senior Notes due 2011 upon maturity | Mar. 31, 2010 3 7/8 % Convertible Senior Notes due 2011 upon maturity | Dec. 31, 2008 Adoption of FASB guidance relating to convertible debt instruments that may be settled in cash upon conversion Nonconvertible debt | Dec. 31, 2011 Adjustment Adoption of FASB guidance relating to convertible debt instruments that may be settled in cash upon conversion | Dec. 31, 2010 Adjustment Adoption of FASB guidance relating to convertible debt instruments that may be settled in cash upon conversion | Dec. 31, 2009 Adjustment Adoption of FASB guidance relating to convertible debt instruments that may be settled in cash upon conversion | Dec. 31, 2008 Adjustment Adoption of FASB guidance relating to convertible debt instruments that may be settled in cash upon conversion
Accounting Policies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowing rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 6.125% | 3.875% | 3.875% | 3.875% | 3.875% | 3.875% |  |  |  |  |
Real estate assets for which tenant purchase option is recorded, net | $ 644,000,000 |  |  |  |  |  |  |  | $ 644,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decrease in net income on adoption of FASB guidance | (192,948,000) | (102,885,000) | (19,676,000) | (48,984,000) | (77,583,000) | (57,898,000) | (58,067,000) | (52,619,000) | (364,493,000) | (246,167,000) | (266,495,000) |  |  |  |  |  |  |  |  | 4,000,000 | 4,200,000 | 3,900,000 |
Decrease in net income per diluted share on adoption of FASB guidance (in dollars per share) | $ (0.66) | $ (0.35) | $ (0.11) | $ (0.30) | $ (0.49) | $ (0.37) | $ (0.37) | $ (0.34) | $ (1.58) | $ (1.56) | $ (1.74) |  |  |  |  |  |  |  |  | $ 0.02 | $ 0.03 | $ 0.03 |
Increase in total equity on adoption of FASB guidance | 9,355,944,000 |  |  |  | 2,390,205,000 |  |  |  | 9,355,944,000 | 2,390,205,000 | 2,484,060,000 | 2,179,735,000 |  |  |  |  |  |  |  |  |  |  | 12,100,000
Calculated equity component on adoption of FASB guidance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19,500,000 |  |  |  |
Remaining unamortized liability component | 6,429,116,000 |  |  |  | 2,900,044,000 |  |  |  | 6,429,116,000 | 2,900,044,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount repaid |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 230,000,000 |  |  |  |  |  |  |  |  |
Aggregate shares of common stock issued for the conversion value in excess of the principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  | 943,714 |  |  |  |  |  |  |  |  |

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