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Schedule III-Real Estate and Accumulated Depreciation (Details 2) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
REAL ESTATE AND ACCUMULATED DEPRECIATION |  |  |
Aggregate gross cost of the property for federal income tax purposes | $ 8,035,421 us-gaap_RealEstateFederalIncomeTaxBasis |  |
Changes in total real estate assets |  |  |
Balances, beginning of year | 9,181,338 us-gaap_RealEstateGrossAtCarryingValue | 9,012,706 us-gaap_RealEstateGrossAtCarryingValue | 7,489,735 us-gaap_RealEstateGrossAtCarryingValue
Additions | 4,042,409 mac_RealEstateAcquisitionsImprovementsAndOtherAdditions | 943,159 mac_RealEstateAcquisitionsImprovementsAndOtherAdditions | 1,909,530 mac_RealEstateAcquisitionsImprovementsAndOtherAdditions
Dispositions and retirements | (445,865)mac_RealEstateCostOfRealEstateSoldOrRetired | (774,527)mac_RealEstateCostOfRealEstateSoldOrRetired | (386,559)mac_RealEstateCostOfRealEstateSoldOrRetired
Balances, end of year | 12,777,882 us-gaap_RealEstateGrossAtCarryingValue | 9,181,338 us-gaap_RealEstateGrossAtCarryingValue | 9,012,706 us-gaap_RealEstateGrossAtCarryingValue
Changes in accumulated depreciation |  |  |
Balances, beginning of year | 1,559,572 us-gaap_RealEstateAccumulatedDepreciation | 1,533,160 us-gaap_RealEstateAccumulatedDepreciation | 1,410,692 us-gaap_RealEstateAccumulatedDepreciation
Additions | 289,178 mac_RealEstateAccumulatedDepreciationDepreciationExpenseAndOtherAdditions | 284,500 mac_RealEstateAccumulatedDepreciationDepreciationExpenseAndOtherAdditions | 241,231 mac_RealEstateAccumulatedDepreciationDepreciationExpenseAndOtherAdditions
Dispositions and retirements | (138,758)mac_RealEstateAccumulatedDepreciationRealEstateSoldOrRetired | (258,088)mac_RealEstateAccumulatedDepreciationRealEstateSoldOrRetired | (118,763)mac_RealEstateAccumulatedDepreciationRealEstateSoldOrRetired
Balances, end of year | $ 1,709,992 us-gaap_RealEstateAccumulatedDepreciation | $ 1,559,572 us-gaap_RealEstateAccumulatedDepreciation | $ 1,533,160 us-gaap_RealEstateAccumulatedDepreciation
Buildings and improvements | Minimum |  |  |
REAL ESTATE AND ACCUMULATED DEPRECIATION |  |  |
Estimated useful lives of assets | 5 years |  |
Buildings and improvements | Maximum |  |  |
REAL ESTATE AND ACCUMULATED DEPRECIATION |  |  |
Estimated useful lives of assets | 40 years |  |
Tenant improvements | Minimum |  |  |
REAL ESTATE AND ACCUMULATED DEPRECIATION |  |  |
Estimated useful lives of assets | 5 years |  |
Tenant improvements | Maximum |  |  |
REAL ESTATE AND ACCUMULATED DEPRECIATION |  |  |
Estimated useful lives of assets | 7 years |  |
Equipment and furnishings | Minimum |  |  |
REAL ESTATE AND ACCUMULATED DEPRECIATION |  |  |
Estimated useful lives of assets | 5 years |  |
Equipment and furnishings | Maximum |  |  |
REAL ESTATE AND ACCUMULATED DEPRECIATION |  |  |
Estimated useful lives of assets | 7 years |  |

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- Definition Amount of depreciation expense and other additions to accumulated depreciation for the period. + References No definition available. + Details
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- Definition The amount that was removed from accumulated depreciation pertaining to real estate that was sold or retired in the period. + References No definition available. + Details
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- Definition Amount of accumulated depreciation pertaining to real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28.FN4) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule III) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 28 -Article 12 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule III -Article 5 + Details
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