XML 80 R70.htm IDEA: XBRL DOCUMENT v3.5.0.2

Subsequent Events (Details) $ / shares in Units, ft² in Thousands										2 Months Ended			6 Months Ended	9 Months Ended
	Jul. 22, 2016 $ / shares	Jul. 11, 2016 shares	Jul. 06, 2016 USD ($)	May 09, 2016 USD ($) shares	Apr. 19, 2016 shares	Feb. 17, 2016 USD ($) shares	Jan. 19, 2016 shares	Nov. 12, 2015 USD ($) shares	Oct. 30, 2015 $ / shares	Jul. 11, 2016 $ / shares shares	Apr. 19, 2016 $ / shares shares	Jan. 19, 2016 $ / shares shares	Jun. 30, 2016	Jul. 11, 2016 $ / shares shares	Jul. 15, 2016 ft²	Sep. 30, 2015 USD ($)
Subsequent events
Authorized repurchase amount | $				$ 400,000,000		$ 400,000,000		$ 400,000,000								$ 1,200,000,000
Accelerated shares repurchased (shares) | shares				3,964,812	861,235	4,222,193	970,609	4,140,788			5,083,428	5,111,397
Average price per share paid for stock repurchased for accelerated stock repurchases (in dollars per share)											$ 78.69	$ 78.26
Dividend declared (in dollars per share)									$ 2.00
Line of Credit | London Interbank Offered Rate (LIBOR)
Subsequent events
Interest rate spread over basis (percent)													1.50%
Line of Credit | Low end of range | London Interbank Offered Rate (LIBOR)
Subsequent events
Interest rate spread over basis (percent)													1.38%
Line of Credit | High end of range | London Interbank Offered Rate (LIBOR)
Subsequent events
Interest rate spread over basis (percent)													2.00%
Subsequent event
Subsequent events
Accelerated shares repurchased (shares) | shares		1,104,162								5,068,974.000				15,263,799.000
Average price per share paid for stock repurchased for accelerated stock repurchases (in dollars per share)										$ 78.91				$ 78.62
Dividend declared (in dollars per share)	$ 0.68
Subsequent event | The Market Place at Flagstaff
Subsequent events
Property area (in square feet) | ft²															347
Subsequent event | Line of Credit
Subsequent events
Current borrowing capacity | $			$ 1,500,000,000
Maximum contingent borrowing capacity | $			$ 2,000,000,000
Extension option (years)			1 year
Subsequent event | Line of Credit | London Interbank Offered Rate (LIBOR)
Subsequent events
Interest rate spread over basis (percent)			1.33%
Subsequent event | Line of Credit | Low end of range | London Interbank Offered Rate (LIBOR)
Subsequent events
Interest rate spread over basis (percent)			1.30%
Subsequent event | Line of Credit | High end of range | London Interbank Offered Rate (LIBOR)
Subsequent events
Interest rate spread over basis (percent)			1.90%

X

- Definition

Accelerated Share Repurchase Program, Number of Shares Purchased

+ References

No definition available.

+ Details

Name:	mac_AcceleratedShareRepurchaseProgramNumberofSharesPurchased
Namespace Prefix:	mac_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The term of the extension option on the credit facility.

+ References

No definition available.

+ Details

Name:	mac_LineOfCreditFacilityTermOfExtensionOption
Namespace Prefix:	mac_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line of Credit Facility, Maximum Contingent Borrowing Capacity

+ References

No definition available.

+ Details

Name:	mac_LineofCreditFacilityMaximumContingentBorrowingCapacity
Namespace Prefix:	mac_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 25
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653

+ Details

Name:	us-gaap_AcceleratedShareRepurchasesFinalPricePaidPerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
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

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
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

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mac_FlagstaffMallTheMarketPlaceAtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: