Long-Term Compensation - Performance Pool awarded (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended
Jan. 31, 2018	Jan. 31, 2017
2015 – 2017 Performance Periods [Member] \| Subsequent Event [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance pool	$ 110,230
Common stock	582
Vested POP LTIP Units and LTIP Units	1,170
Grant date fair value	$ 62.65
2014 – 2016 Performance Periods [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance pool		$ 62,220
Common stock		486
Vested POP LTIP Units and LTIP Units		698
Grant date fair value		$ 52.53

Cash incentives awards granted amount under common stock shares.

No definition available.

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- Definition

Cash incentives awards granted amount under performance pool.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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