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Goodwill and Intangibles - Schedule of Acquired Intangibles in Accompanying Consolidated Balance Sheets (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2021 USD ($)
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	$ 1,565,758
Amortization	(46,907)
Acquired	103,541
Foreign currency translation	(3,479)
Ending balance	1,618,913
Customer Relationships, Contracts and Backlog
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	1,309,061
Amortization	(42,965)
Acquired	88,002
Foreign currency translation	(2,734)
Ending balance	1,351,364
Developed Technology
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	40,020
Amortization	(1,119)
Acquired	15,539
Foreign currency translation	(20)
Ending balance	54,420
Trade Names
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	216,677
Amortization	(2,823)
Acquired	0
Foreign currency translation	(725)
Ending balance	$ 213,129

X

- Definition

Finite-Lived Intangible Assets, Net, Acquired As Part Of Business Combination

+ References

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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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-Topic 350
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Amount of foreign currency translation gain (loss) which increases (decreases) assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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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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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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-Publisher FASB
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-Topic 350
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-Paragraph 1
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