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Consolidated Statements of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Parent Company [Member]    
Consolidated net income $ 64,677us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
$ 15,714us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Unrealized loss from the effective portion of derivitave insturments (4,347)us-gaap_DerivativeInstrumentsLossRecognizedInOtherComprehensiveIncomeEffectivePortion
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(997)us-gaap_DerivativeInstrumentsLossRecognizedInOtherComprehensiveIncomeEffectivePortion
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Reclassification adjustment for net losses included in net income for the effective portion of derivative instruments 2,192us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
3,725us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Total comprehensive income 62,522us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
18,442us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Less: comprehensive income attributable to noncontrolling interests (3,296)maa_ComprehensiveIncomeAttributabletoNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
(992)maa_ComprehensiveIncomeAttributabletoNoncontrollingInterest
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Comprehensive income attributable to MAA 59,226us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
17,450us-gaap_ComprehensiveIncomeNetOfTax
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
Limited Partner [Member]    
Consolidated net income 64,677us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_LimitedPartnerMember
15,714us-gaap_ProfitLoss
/ dei_LegalEntityAxis
= us-gaap_LimitedPartnerMember
Unrealized loss from the effective portion of derivitave insturments (4,347)us-gaap_DerivativeInstrumentsLossRecognizedInOtherComprehensiveIncomeEffectivePortion
/ dei_LegalEntityAxis
= us-gaap_LimitedPartnerMember
(997)us-gaap_DerivativeInstrumentsLossRecognizedInOtherComprehensiveIncomeEffectivePortion
/ dei_LegalEntityAxis
= us-gaap_LimitedPartnerMember
Reclassification adjustment for net losses included in net income for the effective portion of derivative instruments 2,192us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_LimitedPartnerMember
3,725us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
/ dei_LegalEntityAxis
= us-gaap_LimitedPartnerMember
Comprehensive income attributable to Mid-America Apartments, L.P. $ 62,522maa_ComprehensiveIncomeNetofTaxAttributabletoParent
/ dei_LegalEntityAxis
= us-gaap_LimitedPartnerMember
$ 18,442maa_ComprehensiveIncomeNetofTaxAttributabletoParent
/ dei_LegalEntityAxis
= us-gaap_LimitedPartnerMember