Performance measurement period, end date.

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- Definition

Performance measurement period, start date.

+ References

No definition available.

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- Definition

Share-based compensation arrangement by share based payment award equity instruments other than options granted in period total fair value.

+ References

No definition available.

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- Definition

Share based compensation arrangement by share based payment award grant date fair value.

+ References

No definition available.

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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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ Details

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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- Definition

Percentage of vesting of share-based compensation awards.

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-Publisher FASB
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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Incentive Compensation - Additional Information (Details) - USD ($)			12 Months Ended
	Apr. 03, 2018	Feb. 05, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Nov. 30, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value of stock options granted				$ 4.02	$ 3.40
Performance Programs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			4 years
Unrecognized compensation cost expected to be recognized over a weighted-average period			2 years 3 months 18 days
Performance measurement period, term			3 years
Fair value of awards granted			$ 7,009,000	$ 10,520,000	$ 10,914,000
Unrecognized compensation cost			$ 10,537,000
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			4 years
Fair value granted			$ 1,335,000	1,309,000	1,600,000
Unrecognized compensation cost expected to be recognized over a weighted-average period			2 years 3 months 18 days
Unrecognized compensation cost			$ 1,918,000
Employee Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost			$ 1,370,000
Unrecognized compensation cost expected to be recognized over a weighted-average period			1 year
Stock options, granted			0
Stock Options Expiration Period			10 years
Employee Stock Option [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			5 years
Employee Stock Option [Member] \| Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			3 years
Equity Incentive Plan [Member] \| Full Value Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for grant			9,643,663
Equity Incentive Plan [Member] \| Full Value Awards [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for grant						17,142,857
Equity Incentive Plan [Member] \| Not Full Value Awards [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for grant						34,285,714
LTIP Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value granted			$ 10,145,000	$ 7,467,000	$ 10,106,000
Unrecognized compensation cost			$ 12,387,000
Unrecognized compensation cost expected to be recognized over a weighted-average period			2 years
LTIP Units [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			5 years
LTIP Units [Member] \| Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			3 years
2017 Performance Program [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		4 years
Performance measurement period, term		3 years
Fair value of awards granted		$ 7,009,000
Performance measurement period, start date		Jan. 01, 2018
Performance measurement period, end date		Dec. 31, 2020
2017 Performance Program [Member] \| Share-Based Compensation Award Tranche One [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of the awards that vest		50.00%
2017 Performance Program [Member] \| Share-Based Compensation Award Tranche Two [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of the awards that vest		50.00%
2015 Performance Program [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost expected to be recognized over a weighted-average period	1 year 7 months 6 days
Unrecognized compensation cost	$ 947,000
Performance measurement period, units forfeited	779,055