Goodwill and Intangible Assets - Narrative (Details) - USD ($)	1 Months Ended	2 Months Ended	3 Months Ended	8 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 07, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 07, 2021	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Impairment losses recognized in goodwill	$ 0	$ 0		$ 0	$ 0		$ 0
Fair Value	969,600,000		$ 969,600,000			$ 969,600,000		$ 199,600,000
Amortization of finite-lived intangible assets	8,400,000		$ 2,700,000	3,600,000		$ 9,900,000	10,800,000
Impairment of intangible assets, finite-lived	$ 0	$ 0		$ 0	$ 0		$ 0

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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-Name Accounting Standards Codification
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- References

No definition available.

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Publisher FASB
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- Definition

Amount before accumulated amortization of intangible assets, excluding goodwill.

+ References

No definition available.

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