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Equity - Noncontrolling Interests Narrative (Details) $ in Thousands, shares in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) entity shares | Dec. 31, 2017 USD ($)
Noncontrolling Interest [Line Items] |  |
Non-managing member unitholders | $ 176,751 | $ 176,888
Noncontrolling Interests |  |
Noncontrolling Interest [Line Items] |  |
Non-managing members DownREIT units outstanding (in shares) | shares | 4 |
Conversion of DownREIT units (in shares) | shares | 7 |
Number of DownREIT LLCs (in entities) | entity | 5 |
Non-managing member unitholders | $ 177,000 |
DownREIT unit, fair value | $ 185,000 |

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- Definition The number of DownREIT units outstanding. + References No definition available. + Details
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- Definition Fair value of the equity interests owned by noncontrolling preferred unit holders in an entity included in the reporting entity's consolidated financial statements. + References No definition available. + Details
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- Definition This element represents the number of DownREIT LLCs for which the entity is the managing member. + References No definition available. + Details
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- Definition The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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