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Share and Unit-Based Plans - Compensation Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share and unit-based plans
Compensation cost under share and unit-based plans	$ 6,490	$ 6,385	$ 30,437	$ 34,133
LTIP Units
Share and unit-based plans
Compensation cost under share and unit-based plans	5,269	5,204	24,892	27,752
Stock awards
Share and unit-based plans
Compensation cost under share and unit-based plans	0	0	0	20
Stock units
Share and unit-based plans
Compensation cost under share and unit-based plans	1,002	965	4,947	5,339
Stock options
Share and unit-based plans
Compensation cost under share and unit-based plans	34	4	53	12
Phantom stock units
Share and unit-based plans
Compensation cost under share and unit-based plans	$ 185	$ 212	$ 545	$ 1,010

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=96867065&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=96867065&loc=d3e5070-113901

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- Definition

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+ References

No definition available.

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