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Income/(Loss) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Income/(loss) from continuing operations | $ 10,611 | $ 2,351 | $ 9,775 | $ 5,713 |
Gains/(loss) on sales of real estate, net of tax | 31,302 | 0 | 82,305 | 0 |
(Income)/loss from continuing operations attributable to noncontrolling interest |  |  | (3,167) |  |
Income/(loss) from continuing operations attributable to UDR, Inc. | 40,476 | 2,336 | 88,911 |  | 5,637
Income/(loss) from continuing operations operations attributable to common stockholders | 39,545 | 1,405 | 86,118 |  | 2,844
Income/(loss) from discontinued operations, net of tax | 79 | 884 | 10 | 2,567 | 2,567
(Income)/loss from discontinued operations attributable to redeemable noncontrolling interest in the Operating Partnership | (6) | (32) | (4) |  | (92)
Income/(loss) from discontinued operations attributable to common stockholders | 73 | 852 | 6 | 2,475 |
Net income/(loss) | 41,992 | 3,235 | 92,090 | 8,280 |
Net (income)/loss attributable to noncontrolling interests | 4 | 37 | (2) | 30 |
Net (income)/loss attributable to redeemable non-controlling interests in Operating Partnership | 1,447 | 84 | 3,171 | 198 | 198
Net (loss)/income attributable to common stockholders | 39,618 | 2,257 | 86,124 | 5,319 | 5,319
Denominator for earnings per share - basic and diluted: |  |  |  |  |
Weighted average common shares outstanding | 252,891,000 | 250,744,000 | 251,860,000 |  | 250,663,000
Non-vested restricted stock rewards | 1,236 | 759 | (1,159) |  | (701)
Denominator for basic and diluted earnings per share | 251,655,000 | 249,985,000 | 250,701,000 |  | 249,962,000
Incremental shares issuable for assumed conversion of: Stock options and unvested restricted stock | (2,077,000) | (1,469,000) | (1,974,000) |  | (1,477,000)
Weighted average number of common shares outstanding — diluted | 253,732,000 | 251,454,000 | 252,675,000 | 251,439,000 | 251,439,000
Income/(loss) from continuing operations attributable to common stockholders, per basic share | $ 0.16 | $ 0.01 | $ 0.34 | $ 0.01 |
Net income/(loss) attributable to common stockholders | $ 0.16 | $ 0.01 | $ 0.34 | $ 0.02 |
Income/(loss) from discontinued operations attributable to common stockholders, per basic share | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.01 |
Income/(loss) from continuing operations attributable to common stockholders, per diluted share | $ 0.16 | $ 0.01 | $ 0.34 | $ 0.01 |
Income from discontinued operations attributable to common stockholders, per diluted share | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.01 |
Net income/(loss) attributable to common stockholders | $ 0.16 | $ 0.01 | $ 0.34 | $ 0.02 |
OP Units [Member] |  |  |  |  |
Denominator for earnings per share - basic and diluted: |  |  |  |  |
Antidilutive securities | 9,188,987 | 9,323,373 | 9,274,401 |  | 9,342,522
Convertible preferred stock [Member] |  |  |  |  |
Denominator for earnings per share - basic and diluted: |  |  |  |  |
Antidilutive securities | 3,035,548 | 3,035,548 | 3,035,548 |  | 3,035,548
Stock options and unvested restricted stock [Member] |  |  |  |  |
Denominator for earnings per share - basic and diluted: |  |  |  |  |
Antidilutive securities | 2,077,297 | 1,468,706 | 1,974,025 |  | 1,477,021
Series E Preferred Stock [Member] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Distributions to preferred stockholders - Series E (Convertible) | (931) | (931) | (2,793) | (2,793) |
Noncontrolling Interests [Member] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
(Income)/loss from continuing operations attributable to noncontrolling interest | 4 | 37 | (2) |  | 30
RedeemableNoncontrollingInterest [Member] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
(Income)/loss from continuing operations attributable to noncontrolling interest | $ (1,441) | $ (52) |  |  | $ (106)

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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 28A -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1500-109256 + Details
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- Definition Portion of net income (loss) attributable to nonredeemable noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.19) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of Net Income (Loss) attributable to redeemable noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.19) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1377-109256 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686 + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256 + Details
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