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Subsequent Events: (Details) (Dividend declared, USD $)	1 Months Ended
	Sep. 30, 2012	Jul. 27, 2012
Dividend declared
Subsequent events
Dividend/distribution for common stockholders and OP Unit holders (in dollars per share)		$ 0.55
Percentage of dividend/distribution payable in cash	100.00%

X

- Definition

Percentage of the cash component of the aggregate dividend declared (not including cash paid in lieu of fractional shares).

+ References

No definition available.

+ Details

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Namespace Prefix:	mac_
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Balance Type:	na
Period Type:	duration

X

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 32

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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Balance Type:	na
Period Type:	instant

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- Details

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