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Real Estate (Tables) | 3 Months Ended
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Mar. 31, 2016
Schedule of Real Estate Investments And Accumlated Depreciation [Table Text Block} | The following table summarizes the carrying amounts for the Company’s investment in real estate (at cost) as of March 31, 2016 and December 31, 2015 (amounts in thousands):
|  | March 31, 2016 |  | December 31, 2015
Land |  | $ | 5,777,206 |  |  | $ | 5,864,046 |
Depreciable property: |  |  |  |
Buildings and improvements |  | 16,430,979 |  |  | 16,346,829 |
Furniture, fixtures and equipment |  | 1,219,444 |  |  | 1,207,098 |
In-Place lease intangibles |  | 465,392 |  |  | 483,160 |
Projects under development: |  |  |  |
Land |  | 247,568 |  |  | 284,995 |
Construction-in-progress |  | 826,254 |  |  | 837,381 |
Land held for development: |  |  |  |
Land |  | 114,149 |  |  | 120,007 |
Construction-in-progress |  | 39,874 |  |  | 38,836 |
Investment in real estate |  | 25,120,866 |  |  | 25,182,352 |
Accumulated depreciation |  | (4,977,274 | ) |  | (4,905,406 | )
Investment in real estate, net |  | $ | 20,143,592 |  |  | $ | 20,276,946 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] | The following table summarizes the carrying amounts for the Company's above and below market ground and retail lease intangibles as of March 31, 2016 and December 31, 2015 (amounts in thousands):
Description |  | Balance Sheet Location |  | March 31, 2016 |  | December 31, 2015
Assets |  |  |  |  |  |
Ground lease intangibles – below market |  | Other Assets |  | $ | 178,251 |  |  | $ | 178,251 |
Retail lease intangibles – above market |  | Other Assets |  | 1,260 |  |  | 1,260 |
Lease intangible assets |  |  |  | 179,511 |  |  | 179,511 |
Accumulated amortization |  |  |  | (14,582 | ) |  | (13,451 | )
Lease intangible assets, net |  |  |  | $ | 164,929 |  |  | $ | 166,060 |
Liabilities |  |  |  |  |  |
Ground lease intangibles – above market |  | Other Liabilities |  | $ | 2,400 |  |  | $ | 2,400 |
Retail lease intangibles – below market |  | Other Liabilities |  | 5,270 |  |  | 5,270 |
Lease intangible liabilities |  |  |  | 7,670 |  |  | 7,670 |
Accumulated amortization |  |  |  | (3,694 | ) |  | (3,414 | )
Lease intangible liabilities, net |  |  |  | $ | 3,976 |  |  | $ | 4,256 |
Schedule of Expected Amortization Expense [Table Text Block] | The following table provides a summary of the aggregate amortization expense for above and below market ground lease intangibles and retail lease intangibles for each of the next five years (amounts in thousands):
|  | Remaining |  |  |  |  |  |  |  |  |  |
|  | 2016 |  | 2017 |  | 2018 |  | 2019 |  | 2020 |  | 2021
Ground lease intangibles |  | $ | 3,241 |  |  | $ | 4,321 |  |  | $ | 4,321 |  |  | $ | 4,321 |  |  | $ | 4,321 |  |  | $ | 4,321 |
Retail lease intangibles |  | (667 | ) |  | (540 | ) |  | (71 | ) |  | (71 | ) |  | (71 | ) |  | (67 | )
Total |  | $ | 2,574 |  |  | $ | 3,781 |  |  | $ | 4,250 |  |  | $ | 4,250 |  |  | $ | 4,250 |  |  | $ | 4,254 |
Acquired and Disposed Properties [Table Text Block] | Acquisitions and Dispositions During the quarter ended March 31, 2016, the Company acquired the entire equity interest in the following from unaffiliated parties (purchase price in thousands):
|  | Properties |  | Apartment Units |  | Purchase Price
Rental Properties – Consolidated (1) |  | 3 |  |  | 479 |  |  | $ | 204,134 |
Total |  | 3 |  |  | 479 |  |  | $ | 204,134 |
(1) | Purchase price includes an allocation of approximately $80.9 million to land and $123.2 million to depreciable property.
During the quarter ended March 31, 2016, the Company disposed of the following to unaffiliated parties (sales price in thousands):
|  | Properties |  | Apartment Units |  | Sales Price
Rental Properties – Consolidated (1) |  | 80 |  |  | 26,162 |  |  | $ | 6,314,953 |
Land Parcels |  | — |  |  | — |  |  | 27,455 |
Total |  | 80 |  |  | 26,162 |  |  | $ | 6,342,408 |
Starwood Portfolio [Member] |
Schedule of Real Estate Investments And Accumlated Depreciation [Table Text Block} | In accordance with this classification, the Company ceased depreciation on all assets in the Starwood portfolio as of November 1, 2015 and the following assets were classified as held for sale in the accompanying consolidated balance sheets at December 31, 2015 (amounts in thousands):
|  | December 31, 2015
Land |  | $ | 602,737 |
Depreciable property: |  |
Buildings and improvements |  | 2,386,489 |
Furniture, fixtures and equipment |  | 335,565 |
In-Place lease intangibles |  | 35,554 |
Real estate held for sale before accumulated depreciation |  | 3,360,345 |
Accumulated depreciation |  | (1,179,210 | )
Real estate held for sale |  | $ | 2,181,135 |
Disposed Properties [Table Text Block] | The following table provides the operating segments/locations of the properties and apartment units sold in the Starwood Transaction, which represents substantially all of the assets in the Company's South Florida and Denver markets and certain assets in the Washington D.C., Seattle and Inland Empire, California (part of Los Angeles) markets. The sale of these properties represents the continuation of the Company's long-term strategy of investing in high barrier to entry urban markets. See Note 11 for further discussion.
Markets/Metro Areas |  | Properties |  | Apartment Units
South Florida |  | 33 |  |  | 10,742 |
Denver |  | 18 |  |  | 6,635 |
Washington D.C. |  | 10 |  |  | 3,020 |
Seattle |  | 8 |  |  | 1,721 |
Inland Empire, CA (part of Los Angeles) |  | 3 |  |  | 1,144 |
Total |  | 72 |  |  | 23,262 |

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- Definition Tabular disclosure of a material business combination completed during the period, including background, timing, and recognized assets and liabilities. This table does not include leveraged buyouts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1486-128463 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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