Share-Based Compensation - Unvested Restricted Shares (Details)	6 Months Ended
Jun. 30, 2021 $ / shares shares
Share-Settled RSUs
Nonvested Restricted Shares
Unvested, beginning balance (in shares) \| shares	2,118,605
Granted (in shares) \| shares	2,078,409
Vested (in shares) \| shares	(635,023)
Forfeited (in shares) \| shares	(171,384)
Unvested, ending balance (in shares) \| shares	3,390,607
Weighted Avg. Grant Date Fair Value
Unvested, beginning balance (in dollars per share) \| $ / shares	$ 26.00
Granted (in dollars per share) \| $ / shares	10.70
Vested (in dollars per share) \| $ / shares	34.09
Forfeited (in dollars per share) \| $ / shares	19.78
Unvested, ending balance (in dollars per share) \| $ / shares	$ 14.89
Share-Settled PSUs
Nonvested Restricted Shares
Unvested, beginning balance (in shares) \| shares	527,105
Granted (in shares) \| shares	0
Vested (in shares) \| shares	(57,794)
Forfeited (in shares) \| shares	(134,361)
Unvested, ending balance (in shares) \| shares	334,950
Weighted Avg. Grant Date Fair Value
Unvested, beginning balance (in dollars per share) \| $ / shares	$ 36.37
Granted (in dollars per share) \| $ / shares	0
Vested (in dollars per share) \| $ / shares	49.18
Forfeited (in dollars per share) \| $ / shares	46.61
Unvested, ending balance (in dollars per share) \| $ / shares	$ 24.60
Share-Settled PSUs \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of potential pay out, share-settled award base on performance	0.00%
Share-Settled PSUs \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of potential pay out, share-settled award base on performance	200.00%

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

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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.

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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).

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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).

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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.

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

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

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

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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.

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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.

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Percentage of vesting of award under share-based payment arrangement.

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