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Employment and Compensation Arrangements - Private Placement Warrant (Details) - $ / shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Shareholders' Equity
Beginning Balance	52,800,000
Exercise of Private Placement Warrants	(212,174)	0
Restricted Stock Units (RSUs)
Shareholders' Equity
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 23.68		$ 19.30
Warrant [Member]
Shareholders' Equity
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	11.00	$ 18.36	$ 17.35	$ 6.11
Exercised	$ 16.93	$ 0
Private Warrant
Shareholders' Equity
Beginning Balance	18,026,000	18,300,000
Closing Balance	17,813,826	18,300,000

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- Definition

Stock Issued During Period, Shares, Private Warrants Exercised

+ References

No definition available.

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644

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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=120381028&loc=d3e5070-113901

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- Definition

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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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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