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

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 (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ 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 (c)(2)(iii)(3)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ 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 (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ 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 (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ 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 (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

+ 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 (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested 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
-Subparagraph (c)(2)(iii)(2)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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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

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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Stock-Based and Other Compensation Plans - Restricted Stock and Phantom Unit Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restricted Stock
Weighted Average Award Date Fair Value
Awarded (in dollars per share)	$ 19.54	$ 27.96	$ 35.45
Restricted Stock \| Subject to Time Vesting
Number of Shares
Outstanding, beginning balance (in shares)	3,172,891
Awarded (in shares)	2,464,682
Vested (in shares)	(906,485)
Forfeited (in shares)	(486,733)
Outstanding, ending balance (in shares)	4,244,355	3,172,891
Weighted Average Award Date Fair Value
Outstanding, beginning of period (in dollars per share)	$ 32.72
Awarded (in dollars per share)	22.33
Vested (in dollars per share)	34.11
Forfeited (in dollars per share)	27.97
Outstanding, end of period (in dollars per share)	$ 27.02	$ 32.72
Restricted Stock \| Subject to Market Conditions
Number of Shares
Outstanding, beginning balance (in shares)	1,385,634
Awarded (in shares)	1,138,730
Vested (in shares)	0
Forfeited (in shares)	(347,948)
Outstanding, ending balance (in shares)	2,176,416	1,385,634
Weighted Average Award Date Fair Value
Outstanding, beginning of period (in dollars per share)	$ 21.74
Awarded (in dollars per share)	13.50
Vested (in dollars per share)	0
Forfeited (in dollars per share)	21.20
Outstanding, end of period (in dollars per share)	$ 17.52	$ 21.74
Phantom Units \| Subject to Time Vesting
Number of Shares
Outstanding, beginning balance (in shares)	467,365
Awarded (in shares)	803,606
Vested (in shares)	(462,823)
Forfeited (in shares)	(92,762)
Outstanding, ending balance (in shares)	715,386	467,365
Weighted Average Award Date Fair Value
Outstanding, beginning of period (in dollars per share)	$ 31.65
Awarded (in dollars per share)	22.39
Vested (in dollars per share)	31.65
Forfeited (in dollars per share)	22.55
Outstanding, end of period (in dollars per share)	$ 22.39	$ 31.65
Phantom Units \| Subject to Market Conditions
Number of Shares
Outstanding, beginning balance (in shares)	150,296
Forfeited (in shares)	(150,296)
Outstanding, ending balance (in shares)	0	150,296
Weighted Average Award Date Fair Value
Outstanding, beginning of period (in dollars per share)	$ 6.82
Forfeited (in dollars per share)	6.82
Outstanding, end of period (in dollars per share)	$ 0	$ 6.82