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Employment and Compensation Arrangements (Details) - USD ($) |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 21, 2021 | Aug. 14, 2019 | May 13, 2019 | Jun. 30, 2021 | Jun. 30, 2020 | Sep. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Jun. 14, 2021 | Dec. 31, 2020 | Feb. 29, 2020 | Feb. 21, 2020 | Dec. 31, 2019
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized grants |  |  |  |  |  |  |  |  |  |  |  | 60,000,000 |  |  |
Share-based compensation expense |  |  |  |  |  | $ 10,609,000 |  | $ 6,796,000 | $ 107,767,000 | $ 31,121,000 |  |  |  |  |
Tax benefits |  |  |  |  |  | $ 1,027,000 |  | 0 | $ 6,862,000 | 0 |  |  |  |  |
Vesting period |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  |  |  |  | $ 23.70 |  |  |  |  |  |  |  |  |
Options issued (in shares) |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Non-option award granted (in shares) |  |  |  |  |  | 565,896 |  |  |  |  |  |  |  |  |
Number of shares called per warrant (in shares) |  |  | 52,800,000 |  |  |  |  |  |  |  |  | 52,800,000 |  |  |
Warrant exercise price (usd per share) |  |  | $ 11.50 |  |  |  |  |  |  |  |  |  |  |  |
Warrants exercised (in shares) | 212,174 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares withheld to cover exercise price (in shares) | 80,610 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock, net (in shares) | 131,564 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares |  |  | 5,309,713 |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, price per share (usd per share) |  |  |  |  | $ 22.50 | $ 25.25 |  |  | $ 25.25 |  | $ 26.00 |  | $ 20.25 |  |
Capital stock, issued (in shares) |  |  |  |  |  | 639,750,620 |  |  | 639,750,620 |  |  | 606,329,598 |  |  |
Net proceeds after fees |  |  |  | $ 728,080,000 | $ 304,030,000 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  | 24,132,666 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value |  |  |  |  |  | $ 2,525,000 |  | $ 76,000 | $ 12,021,000 | $ 2,996,000 |  |  |  |  |
Public Warrant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares called per warrant (in shares) |  |  | 34,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Outstanding |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |
Private Warrant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares called per warrant (in shares) |  |  | 18,300,000 |  |  | 17,813,826 |  | 18,300,000 | 17,813,826 | 18,300,000 |  | 18,026,000 |  |  | 18,300,000
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contractual term |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contractual term |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |
Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant exercise price (usd per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11.50 |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  |  |  |  |  |  |  |  | $ 24.11 |  |  |  |  |  |
Non-option award granted (in shares) |  |  |  |  |  |  |  |  | 2,856,222 |  |  |  |  |  |
Restricted Stock Units (RSUs) | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |
Restricted Stock Units (RSUs) | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |
PSUs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |
Vesting period |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |
TSR PSUs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  |  |  |  | $ 790,000 |  |  | $ 3,048,000 |  |  |  |  |  |
Vesting period |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |
TSR PSUs | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Payout As A Percent Of Target |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |
TSR PSUs | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Payout As A Percent Of Target |  |  |  |  |  |  |  |  | 120.00% |  |  |  |  |  |
Sponsor agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital stock, issued (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,000,000
Share-based Payment Arrangement, Tranche One |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Price |  |  | $ 15.25 |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares |  |  | 2,654,856 |  |  |  |  |  |  |  |  |  |  |  |
Period After Closing for Sale Price of Share |  |  | 42 months |  |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Tranche Two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Price |  |  | $ 17.50 |  | $ 17.50 |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares |  |  |  |  | 17,265,826 |  |  |  |  |  |  |  |  |  |
Management Incentive Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |
Incentive Award Plan 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options not granted |  |  |  |  |  | 41,271,255 |  |  | 41,271,255 |  |  | 42,785,926 |  |  |
Transaction Related Awards 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized grants |  |  | 7,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  |  |  |  |  | $ 13,720,000 |  |  |  |  |  |  |  |
Share Price |  |  | $ 20.00 |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average risk-free interest rate |  |  | 1.33% |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average expected dividend yield |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |
Transaction Related Awards 2019 | Sponsor agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  |  |  |  |  |  |  |  | $ 25,013,000 |  |  |  |  |
Weighted-average risk-free interest rate |  | 1.42% | 2.20% |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate |  | 20.00% | 20.00% |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average expected dividend yield |  | 0.00% | 0.00% |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) In Expense Relating Granting Of Incentive Shares |  |  |  |  |  |  |  |  |  | 48,102,000 |  |  |  |  |
Increase (Decrease) In Expense Relating To Shares Purchased By Founders |  |  |  |  |  |  |  |  |  | 4,411,000 |  |  |  |  |
Transaction Related Awards 2019 | Sponsor agreement | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement By Share-Based Payment Award, Fair Value Assumptions, Discount For Lack Of Marketability |  | 3.00% | 3.00% |  |  |  |  |  |  |  |  |  |  |  |
Contractual term |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |
Transaction Related Awards 2019 | Sponsor agreement | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement By Share-Based Payment Award, Fair Value Assumptions, Discount For Lack Of Marketability |  | 7.00% | 7.00% |  |  |  |  |  |  |  |  |  |  |  |
Contractual term |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |
Transaction Related Awards 2019 | Sponsor agreement | Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) In Expense Relating To Vesting Of Ordinary Shares |  |  |  |  |  |  |  |  |  | 6,297 |  |  |  |  |
Transaction Related Awards 2019 | Sponsor agreement | Common Stock Issued Price at least $15.25 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) In Expense Relating To Vesting Of Ordinary Shares |  |  |  |  |  |  |  |  |  | 9,396,000 |  |  |  |  |
Sale of stock, price per share (usd per share) |  |  |  |  |  |  |  |  |  |  |  | $ 15.25 |  |  |
Transaction Related Awards 2019 | Sponsor agreement | Common Stock Issued Price at least $17.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) In Expense Relating To Vesting Of Ordinary Shares |  |  |  |  |  |  |  |  |  | 13,101,000 |  |  |  |  |
Sale of stock, price per share (usd per share) |  |  |  |  |  |  |  |  |  |  |  | $ 17.50 |  |  |
Transaction Related Awards 2019 | Sponsor agreement | Founder shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital stock, issued (in shares) |  |  |  |  |  |  |  |  |  |  |  | 1,500,000 |  |  |
Net proceeds after fees |  |  |  |  |  |  |  |  |  | 15,000 |  |  |  |  |
Transaction Related Awards 2019 | Sponsor agreement | Share Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employment and Compensation Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) In Expense Relating To Vesting Of Ordinary Shares |  |  |  |  |  |  |  |  |  | $ 1,193,000 |  |  |  |  |

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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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 (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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