XML 81 R68.htm IDEA: XBRL DOCUMENT
v3.19.1

Financing Arrangement - Narrative (Details) ft² in Thousands | Sep. 30, 2009 ft² | Jan. 01, 2018
--- | --- | ---
Schedule of Joint Ventures [Line Items] |  |
Discount rate |  | 5.80%
Financing Arrangement |  |
Schedule of Joint Ventures [Line Items] |  |
Net operating income multiple |  | 21
Financing Arrangement | Chandler Freehold |  |
Schedule of Joint Ventures [Line Items] |  |
Percentage of loan assumed by third party | 49.90% |
Financing Arrangement | Chandler Fashion Center |  |
Schedule of Joint Ventures [Line Items] |  |
Property area (in square feet) | 1,318 |
Financing Arrangement | Freehold Raceway Mall |  |
Schedule of Joint Ventures [Line Items] |  |
Property area (in square feet) | 1,672 |
Minimum | Financing Arrangement |  |
Schedule of Joint Ventures [Line Items] |  |
Market rent per square foot |  | 30
Maximum | Financing Arrangement |  |
Schedule of Joint Ventures [Line Items] |  |
Market rent per square foot |  | 100

X
- Definition Fair Value Inputs, Financing Arrangement, Operating Income Multiple + References No definition available. + Details
Name: | mac_FairValueInputsFinancingArrangementOperatingIncomeMultiple
Namespace Prefix: | mac_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Financing Arrangement, Discount Rate + References No definition available. + Details
Name: | mac_FinancingArrangementDiscountRate
Namespace Prefix: | mac_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage of ownership interest in the joint venture sold by the entity during the period. + References No definition available. + Details
Name: | mac_JointVentureOwnershipPercentageSold
Namespace Prefix: | mac_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | mac_ScheduleOfJointVenturesLineItems
Namespace Prefix: | mac_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Value of input used to measure asset under finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
Name: | us-gaap_FinanceLeasedAssetMeasurementInput
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=mac_FinancingArrangementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mac_FreeholdRacewayMallAndChandlerFashionCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mac_ChandlerFashionCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mac_FreeholdRacewayMallMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |