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Share and Unit-Based Plans - Compensation Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Share and unit-based plans
Compensation cost under share and unit-based plans	$ 4,973	$ 4,983	$ 29,088	$ 30,103
LTIP Units
Share and unit-based plans
Compensation cost under share and unit-based plans	3,812	3,465	22,810	25,133
Stock awards
Share and unit-based plans
Compensation cost under share and unit-based plans	28	84	225	281
Stock units
Share and unit-based plans
Compensation cost under share and unit-based plans	881	1,134	5,214	3,775
Stock options
Share and unit-based plans
Compensation cost under share and unit-based plans	4	4	12	12
Phantom stock units
Share and unit-based plans
Compensation cost under share and unit-based plans	$ 248	$ 296	$ 827	$ 902

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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



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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