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Real Estate Joint Ventures (Income, Contributions, Distributions and Ending Investment Balances Related to MAA's Joint Ventures) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Real Estate Properties [Line Items]      
Joint venture (loss) gain $ (223) $ (607) $ (1,149)
Gain on joint venture asset dispositions 4,146 14 (358)
Management fee income 899 1,017 680 [1]
Asset and acquisition fees 346 553 808
Contributions to joint venture (218) (1,510) (12,130)
Distributions from joint venture 12,350 1,402 1,735
Investment in at December 31 4,837 17,006 17,505
Advances to at December 31 0 0 0
Mid-America Multifamily Fund I, LLC [Member]
     
Real Estate Properties [Line Items]      
Joint venture (loss) gain (413) (419) (555)
Gain on joint venture asset dispositions 0 0 1
Management fee income 281 275 259
Asset and acquisition fees 225 231 235
Contributions to joint venture (74) (85) (88)
Distributions from joint venture 183 164 93
Investment in at December 31 4,727 5,249 5,747
Advances to at December 31 0 0 0
Mid-America Multifamily Fund II, LLC [Member]
     
Real Estate Properties [Line Items]      
Joint venture (loss) gain 190 (188) (594)
Gain on joint venture asset dispositions 4,146 14 (359)
Management fee income 618 742 421
Asset and acquisition fees 121 322 573
Contributions to joint venture (139) (1,425) (12,042)
Distributions from joint venture 12,167 1,238 1,642
Investment in at December 31 105 11,757 11,758
Advances to at December 31 0 0 0
Mid America Multifamily Fund III LLC [Domain]
     
Real Estate Properties [Line Items]      
Joint venture (loss) gain 0 0 0
Gain on joint venture asset dispositions 0 0 0
Management fee income 0 0 0
Asset and acquisition fees 0 0 0
Contributions to joint venture (5) 0 0
Distributions from joint venture 0 0 0
Investment in at December 31 5 0 0
Advances to at December 31 $ 0 $ 0 $ 0
[1] The 2010 column shows the segment break down based on the 2011 same store portfolios. A comparison using the 2012 same store portfolio would not be comparative due to the nature of the classifications.