The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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The total fair value of shares issued during the period under a deferred compensation arrangement.

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Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Number of shares issued pursuant to the terms of a deferred compensation arrangement.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition.

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Percentage of vesting of share-based compensation awards.

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Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amortization related to restricted stock/Unit awards and LTIP Unit Awards	$ 1,507	$ 1,506	$ 4,470	$ 4,067
Unrecognized compensation related to unvested restricted stock/Unit awards and LTIP Unit Awards	$ 9,919		$ 9,919
Weighted average period of unrecognized compensation expected to be recognized			1 year 20 days
LTIP Unit Awards \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage of LTIP Unit Awards			0.00%
LTIP Unit Awards \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage of LTIP Unit Awards			100.00%
Management \| Restricted Stock/Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock/Unit awards and LTIP Unit Awards issued			308,373
Fair value of restricted stock/Unit awards and LTIP Unit Awards issued			$ 6,047
Vesting Period of restricted stock/Unit awards issued			3 years
Compensation expense recognized at date of grant			$ 1,590	$ 1,250
Management \| LTIP Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock/Unit awards and LTIP Unit Awards issued			254,524
Fair value of restricted stock/Unit awards and LTIP Unit Awards issued			$ 2,561
Director \| Restricted Stock/Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock/Unit awards and LTIP Unit Awards issued			14,460
Fair value of restricted stock/Unit awards and LTIP Unit Awards issued			$ 350
Vesting Period of restricted stock/Unit awards issued			1 year