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Fair Value Measurements - Additional Information (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2021 USD ($)
Changes in fair value [Member]
Fair value, measurement with unobservable inputs reconciliation, recurring basis, liability, period increase (decrease)	$ 18,939
Acquisition related liabilities payments [Member]
Fair value, measurement with unobservable inputs reconciliation, recurring basis, liability, period increase (decrease)	(16,070)
Goodwill [Member]
Fair value, measurement with unobservable inputs reconciliation, recurring basis, liability, period increase (decrease)	$ 29,080

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- Definition

Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

+ Details

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- Details

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- Details

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