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Derivatives and Hedging Activity (UNITED DOMINION REALTY, L.P.) (Details 2) (USD $) In Thousands, 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
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) | $ 1,130 | $ 1,635 | $ 3,809 | $ 5,180 |
Amount of Gain or (Loss) Recognized in Income on Derivative | 0 | 280 | 0 |  | 275
Interest Rate Products [Member] | Interest Expense [Member] | Cash Flow Hedging [Member] |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) | 362 | (386) | 611 |  | (334)
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) | (1,130) | (1,635) | (3,809) |  | (5,180)
United Dominion Reality L.P. [Member] |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) | 588 | 590 | 1,784 | 2,041 |
Amount of Gain or (Loss) Recognized in Income on Derivative | 0 | 0 | 0 | (5) | (5)
United Dominion Reality L.P. [Member] | Interest Rate Products [Member] | Interest Expense [Member] | Cash Flow Hedging [Member] |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) | (3) | (201) | (194) |  | (284)
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) | $ (588) | $ (590) | $ (1,784) |  | $ (2,041)

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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624177-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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