XML 49 R39.htm IDEA: XBRL DOCUMENT v3.10.0.1

Share and Unit-Based Plans (Tables)

9 Months Ended

Sep. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of activity of non-vested LTIP Units, stock awards, phantom stock and stock units

The following table summarizes the activity of the non-vested LTIP Units, phantom stock units and stock units:

	LTIP Units							Phantom Stock Units							Stock Units
	Units			Value(1)				Units			Value(1)				Units			Value(1)
Balance at January 1, 2018	636,632			$	52.36			4,054			$	79.82			151,355			$	73.32
Granted	569,136			51.78				8,765			61.46				87,193			58.85
Vested	(189,044	)		57.49				(10,581	)		54.70				(108,201	)		74.21
Forfeited	(23,666	)		44.28				(845	)		77.91				—			—
Balance at September 30, 2018	993,058			$	51.24			1,393			$	66.79			130,347			$	64.24
(1) Value represents the weighted average grant date fair value.

During the nine months ended September 30, 2018, the Company granted the following LTIP Units:

Grant Date		Units			Type		Fair Value per LTIP Unit				Vest Date
1/1/2018		65,466			Service-based		$	65.68			12/31/2020
1/1/2018		291,326			Market-indexed		$	44.28			12/31/2020
1/29/2018		13,632			Service-based		$	66.02			2/1/2022
1/29/2018		1,893			Service-based		$	66.02			12/31/2020
1/29/2018		7,775			Market-indexed		$	48.23			12/31/2020
3/2/2018		99,407			Service-based		$	59.04			3/2/2018
4/26/2018		89,637			Service-based		$	55.78			4/26/2018
		569,136

Summary of activity of SARs and stock options outstanding

The following table summarizes the activity of the stock appreciations rights ("SARs") and stock options outstanding:

	SARs							Stock Options
	Units			Value(1)				Units			Value(1)
Balance at January 1, 2018	235,439			$	53.83			35,565			$	57.32
Granted	—			—				—			—
Exercised	(235,439	)		53.83				—			—
Balance at September 30, 2018	—			$	—			35,565			$	57.32
(1) Value represents the weighted average exercise price.

Compensation cost under the share and unit-based plans

The following summarizes the compensation cost under the share and unit-based plans:

	For the Three Months Ended September 30,								For the Nine Months Ended September 30,
	2018				2017				2018				2017
LTIP Units	$	3,440			$	5,269			$	21,823			$	24,892
Stock units	972				1,002				5,717				4,947
Stock options	32				34				94				53
Phantom stock units	172				185				585				545
	$	4,616			$	6,490			$	28,219			$	30,437

X

- Definition

Tabular disclosure of the changes in outstanding nonvested Long-Term Incentive Plan ("LTIP") units, stock awards, phantom stock and stock units.

+ References

No definition available.

+ Details

Name:	mac_ScheduleOfShareBasedCompensationLTIPUnitsAwardActivityTableTextBlock
Namespace Prefix:	mac_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Definition

Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock appreciation rights awards that were outstanding at the beginning and end of the year, and the number of stock appreciation rights awards that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockAppreciationRightsAwardActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration