XML 68 R58.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Mortgage Notes Payable - Footnotes (Details) - USD ($) |  |  | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Aug. 31, 2018 | Dec. 04, 2017 | Sep. 30, 2018 | Mar. 01, 2018 | Dec. 31, 2017
Mortgage loans payable on real estate |  |  |  |  |
Unamortized deferred finance costs |  |  | $ 14,232,000 |  | $ 17,838,000
Outside partner interest of the operating partnership |  |  |  | 75.00% |
Westside Pavilion | Joint Venture |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |
Percentage of loan assumed by third party | 75.00% |  |  |  |
Outside partner interest of the operating partnership | 75.00% |  |  |  |
Fashion Outlets of Chicago |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |
Effective interest rate |  |  | 3.76% |  |
Green Acres Commons |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |
Effective interest rate |  |  | 4.81% |  | 4.07%
Remaining borrowing |  |  |  | $ 20,000,000 |
Fashion Outlets of Niagara Falls USA |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |
Debt premiums |  |  | $ 1,934,000 |  | $ 2,630,000
Chandler Freehold |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |
Percentage of loan assumed by third party |  |  | 49.90% |  |
Fashion Outlets of Chicago |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |
Interest rate spread over basis |  |  | 1.50% |  |
Effective interest rate |  |  |  |  | 3.02%
Green Acres Commons |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |
Interest rate spread over basis |  |  | 2.15% |  |
Santa Monica Place |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |
Interest rate spread over basis |  | 1.35% |  |  |
Effective interest rate |  |  | 3.76% |  | 3.13%
Santa Monica Place | Maximum | Cap |  |  |  |  |
Mortgage loans payable on real estate |  |  |  |  |
Interest rate spread over basis |  |  | 4.00% |  |

X
- Definition Joint Venture Ownership Percent by Other Owners + References No definition available. + Details
Name: | mac_JointVentureOwnershipPercentbyOtherOwners
Namespace Prefix: | mac_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Mortgage Loans on Real Estate, Face Amount of Mortgages, Additional Borrowing + References No definition available. + Details
Name: | mac_MortgageLoansonRealEstateFaceAmountofMortgagesAdditionalBorrowing
Namespace Prefix: | mac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Portion of the loan assumed by a third party. + References No definition available. + Details
Name: | mac_PercentageOfLoanAssumedByThirdParty
Namespace Prefix: | mac_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated amortization, of debt premium. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 + Details
Name: | us-gaap_DebtInstrumentUnamortizedPremium
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
Name: | us-gaap_DeferredFinanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=mac_WestsidePavilionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_CorporateJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | us-gaap_DebtInstrumentAxis=mac_FashionOutletsAtNiagaraMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_DebtInstrumentAxis=mac_FashionOutletsOfChicagoMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=mac_GreenAcresCommonsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=mac_SantaMonicaPlaceMortgageMember
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: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateCapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |