XML 63 R48.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Summary of Significant Accounting Policies: Investment in Unconsolidated Joint Ventures (Details) | 12 Months Ended
--- | ---
Dec. 31, 2015
Investment in unconsolidated joint ventures |
Threshold ownership percentage above which to use equity method of accounting only if no controlling financial interest | 50.00%
Buildings and improvements | Minimum |
Property, Plant and Equipment |
Estimated useful lives of assets (in years) | 5 years
Buildings and improvements | Maximum |
Property, Plant and Equipment |
Estimated useful lives of assets (in years) | 40 years
Tenant improvements | Minimum |
Property, Plant and Equipment |
Estimated useful lives of assets (in years) | 5 years
Tenant improvements | Maximum |
Property, Plant and Equipment |
Estimated useful lives of assets (in years) | 7 years
Equipment and furnishings | Minimum |
Property, Plant and Equipment |
Estimated useful lives of assets (in years) | 5 years
Equipment and furnishings | Maximum |
Property, Plant and Equipment |
Estimated useful lives of assets (in years) | 7 years

X
- Definition Represents the threshold percentage of ownership of common stock or equity participation in an investee above which the equity method of accounting is still applied only if the entity does not have a controlling financial interest in the investee. + References No definition available. + Details
Name: | mac_ThresholdOwnershipPercentageForEquityMethodAccountingOnlyIfNoControllingFinancialInterest
Namespace Prefix: | mac_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life on which depreciation was computed for entities with a substantial portion of business acquiring and holding investment real estate, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: 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 2: 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) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 + Details
Name: | us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingAndBuildingImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=mac_TenantImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=mac_EquipmentAndFurnishingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |