Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Mar. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the six months ended March 31, 2021 are as follows (dollars in thousands):

	Total
Balance as of September 30, 2020	$	1,128,198
Effect of foreign currency translation		2,304
Balance as of March 31, 2021	$	1,130,502

Summary of Gross Carrying Amounts and Accumulated Amortization of Intangible Assets by Major Class

The following tables summarizes the gross carrying amounts and accumulated amortization of intangible assets by major class (dollars in thousands):

	March 31, 2021
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Remaining Life (Years)
Customer relationships	$	110,839	$	(82,562	)	$	28,277		2.6
Technology and patents		90,919		(83,660	)		7,259		1.2
Total	$	201,758	$	(166,222	)	$	35,536

	September 30, 2020
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Remaining Life (Years)
Customer relationships	$	110,512	$	(75,915	)	$	34,597		3.0
Technology and patents		90,658		(79,639	)		11,019		1.6
Total	$	201,170	$	(155,554	)	$	45,616