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Real Estate Acquisitions and Dispositions (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) property | Dec. 31, 2015 USD ($) property | Dec. 31, 2014 USD ($)
Properties acquired | property | 4 | 4 |
Property Units Acquired | 573 | 625 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | $ 249,334 | $ 323,837 |
Disposed Properties | 99 | 8 |
Disposed Units | 29,776 | 1,857 |
Proceeds From Sale Of Property | $ 6,943,458 | $ 513,312 |
Distributions from unconsolidated entities – return of capital | 13,798 | 51,144 | $ 103,793
Net gain on sales of real estate properties | 4,044,055 | 335,134 | 212,685
Net gain (loss) on sales of land parcels | $ 15,731 | (1) | 5,277
Starwood Portfolio [Member] |  |  |
Disposed Properties | property | 72 |  |
Disposed Units | 23,262 |  |
Proceeds From Sale Of Property | $ 5,365,000 |  |
Net gain on sales of real estate properties | $ 3,161,097 | $ 0 | $ 0
Consolidated Rental Properties [Member] |  |  |
Properties acquired | property | 4 | 4 |
Property Units Acquired | 573 | 625 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | $ 249,334 | $ 296,037 |
Disposed Properties | property | 98 | 8 |
Disposed Units | 29,440 | 1,857 |
Proceeds From Sale Of Property | $ 6,811,503 | $ 513,312 |
Consolidated Rental Properties [Member] | Land [Member] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 98,000 | 44,700 |
Consolidated Rental Properties [Member] | Depreciable Property [Member] |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | $ 151,300 | 251,300 |
Consolidated Rental Properties [Member] | Starwood Portfolio [Member] |  |  |
Disposed Properties | property | 72 |  |
Disposed Units | 23,262 |  |
Land [Member] |  |  |
Land parcels acquired | 3 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets |  | $ 27,800 |
Disposed Land Parcels | 2 |  |
Proceeds From Sale Of Property | $ 57,455 |  |
Commercial Real Estate [Member] |  |  |
Commercial Properties Disposed |  | 1 |
Proceeds From Sale Of Property |  | $ 123,300 |
Partially Owned Properties – Unconsolidated |  |  |
Disposed Properties | 1 |  |
Disposed Units | 336 |  |
Proceeds From Sale Of Property | $ 74,500 |  |
Equity Method Investment, Ownership Percentage | 20.00% |  |
Distributions from unconsolidated entities – return of capital | $ 12,400 |  |
Net gain on sales of real estate properties | $ 8,900 |  |

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