XML 19 R48.htm IDEA: XBRL DOCUMENT v2.4.0.6

Property: (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended	9 Months Ended	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Feb. 28, 2011 Desert Sky Mall	Sep. 30, 2011 Desert Sky Mall	Sep. 30, 2011 Desert Sky Mall	Jun. 30, 2011 Superstition Springs Land	Sep. 30, 2011 Superstition Springs Land	Sep. 30, 2011 Superstition Springs Land
Investments in unconsolidated joint ventures:
Write off of development cost	$ 2,626	$ 1,011	$ 7,884	$ 526
Remeasurement gain on acquisition of additional interest					$ 1,868	$ 30	$ 1,868	$ 1,734	$ 1,734	$ 1,734
Ownership percentage purchased					50.00%		50.00%	50.00%

X

- Definition

The additional percentage of ownership of common stock or equity participation acquired in the investee accounted for under the equity method of accounting.

+ References

No definition available.

+ Details

Name:	mac_EquityMethodInvestmentAdditionalOwnershipPercentageAcquired
Namespace Prefix:	mac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the development cost written off during the period.

+ References

No definition available.

+ Details

Name:	mac_WriteOffOfDevelopmentCost
Namespace Prefix:	mac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

In a business combination achieved in stages, this element represents the amount of net gain (loss) recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)(2)

-URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph q(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 48

-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.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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