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Share and Unit-Based Plans - Compensation Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share and unit-based plans
Compensation cost under share and unit-based plans	$ 5,300	$ 4,854	$ 24,115	$ 25,200
LTIP Units
Share and unit-based plans
Compensation cost under share and unit-based plans	3,770	3,428	18,998	21,668
Stock awards
Share and unit-based plans
Compensation cost under share and unit-based plans	122	83	197	197
Stock units
Share and unit-based plans
Compensation cost under share and unit-based plans	1,136	1,039	4,333	2,721
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	$ 268	$ 300	$ 579	$ 606

X

- 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



Reference 4: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Staff Accounting Bulletin (SAB)



-Number Topic 14



-Section F

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+ References

No definition available.

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