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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 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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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Stock-Based Compensation - Payroll Reduction Program (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance	8,126,263
Stock based compensation expense	$ 38,592	$ 11,296	$ 35,972
Vesting percentage	25.00%
Cost not recognized	$ 4,200
Unrecognized compensation cost	$ 4,200
Weighted-average period of unrecognized compensation cost to be recognized	1 year 3 months 18 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost not recognized	$ 44,700
Unrecognized compensation cost	$ 44,700
Weighted-average period of unrecognized compensation cost to be recognized	1 year 7 months 6 days
Shares granted	2,955,252
Number of Restricted Stock Awards
Beginning Balance	2,415,140
Granted	2,955,252
Share Vested	(2,386,853)
Share forfeited	(270,777)
Ending Balance	2,712,762	2,415,140
Weighted Average Fair Value
Beginning balance	$ 3.64
Granted	18.87
Vested	4.30
Canceled	11.67
Ending balance	$ 18.77	$ 3.64
Together we win RSU award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Together we win RSU award \| Vest 25% or Common stock is greater than or equal to $18.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	25.00%
Vesting period	1 year
Together we win RSU award \| Vest 75% or Common stock is greater than or equal to $20.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	75.00%
Vesting period	3 years
Employee awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 13,698	$ 9,680	$ 2,740
Employee awards \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduced cash payroll costs		$ 4,000
Shares reserved for issuance		2,356,045
Shares issued		2,356,045
Stock based compensation expense	$ 1,600	$ 6,500
Special equity award program \| Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted	1,400,000
Grant date fair value	$ 27,800
Number of Restricted Stock Awards
Granted	1,400,000