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Share and Unit-Based Plans - Compensation Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share and unit-based plans
Compensation cost under share and unit-based plans	$ 6,349	$ 5,300	$ 27,748	$ 24,115
LTIP Units
Share and unit-based plans
Compensation cost under share and unit-based plans	5,149	3,770	22,548	18,998
Stock awards
Share and unit-based plans
Compensation cost under share and unit-based plans	0	122	20	197
Stock units
Share and unit-based plans
Compensation cost under share and unit-based plans	1,002	1,136	4,374	4,333
Stock options
Share and unit-based plans
Compensation cost under share and unit-based plans	4	4	8	8
Phantom stock units
Share and unit-based plans
Compensation cost under share and unit-based plans	$ 194	$ 268	$ 798	$ 579

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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+ References

No definition available.

+ Details

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