The fair value at approval date of non-option equity instruments granted during the period.

No definition available.

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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

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

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.

+ References

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- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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- Definition

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

+ References

No definition available.

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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- Definition

Net number of non-option equity instruments granted to participants.

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Benefit Plans - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amortization related to restricted stock/Unit awards and LTIP Unit Awards	$ 2,003	$ 1,844	$ 5,689	$ 6,767
Unrecognized compensation related to unvested restricted stock/Unit awards and LTIP Unit Awards	10,450		$ 10,450
Weighted average period of unrecognized compensation expected to be recognized			344 days
Severance Costs			$ 1,298
Management \| Restricted Stock/Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock/Unit awards and LTIP Unit Awards issued			211,890
Fair value of restricted stock/Unit awards and LTIP Unit Awards issued	6,068		$ 6,068
Vesting period of restricted stock/Unit awards issued			3 years
Compensation expense recognized at date of grant				$ 1,590
Management \| LTIP Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock/Unit awards and LTIP Unit Awards issued			179,288
Fair value of restricted stock/Unit awards and LTIP Unit Awards issued	2,381		$ 2,381
Vesting period of restricted stock/Unit awards issued			3 years
Director \| Restricted Stock/Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock/Unit awards and LTIP Unit Awards issued			15,169
Fair value of restricted stock/Unit awards and LTIP Unit Awards issued	$ 490		$ 490
Vesting period of restricted stock/Unit awards issued			1 year