Share-based Compensation - Restricted shares and performance shares (Details) - Non-vested restricted shares and performance shares shares in Thousands	3 Months Ended
Mar. 31, 2021 $ / shares shares
Number of Shares
Outstanding at the beginning of the period (in shares) \| shares	2,040
Granted (in shares) \| shares	813
Vested (in shares) \| shares	(204)
Forfeited (in shares) \| shares	(39)
Outstanding at the end of the period (in shares) \| shares	2,610
Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share) \| $ / shares	$ 12.73
Granted (in dollars per share) \| $ / shares	23.97
Vested (in dollars per share) \| $ / shares	8.95
Forfeited (in dollars per share) \| $ / shares	13.15
Outstanding at the end of the period (in dollars per share) \| $ / shares	$ 16.52

No definition available.

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- Definition

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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- 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.

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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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