Goodwill (Tables)

6 Months Ended

Mar. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill Activity

Goodwill activity for each of the Company’s reportable segments for the six months ended March 31, 2022 is as follows:

	Electronic Materials		Performance Materials		Total
Balance at September 30, 2021, net of accumulated impairment of $227,126	$	444,233	$	132,669	$	576,902
Foreign currency translation impact	(3,393)		205		(3,188)
Impairment (See Note 8)	—		(9,435)		(9,435)
Balance at March 31, 2022, net of accumulated impairment of $236,561	$	440,840	$	123,439	$	564,279