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Summary of Significant Accounting Policies: Acquisitions (Details)	12 Months Ended
	Dec. 31, 2015 form
Accounting Policies [Abstract]
Number of forms of in-place operating lease intangible assets and liabilities	3

X

- Definition

Represents the number of forms that can be taken by the identifiable intangible assets and liabilities relating to in-place operating leases acquired.

+ References

No definition available.

+ Details

Name:	mac_NumberOfFormsOfInPlaceOperatingLeases
Namespace Prefix:	mac_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration