Segment Reporting (Tables)

3 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Schedule of Segment Revenue

Revenue from external customers by segment are as follows:

	Three Months Ended December 31,
	2020		2019
Segment Revenue:
Electronic Materials:
CMP Slurries	$	134,721	$	122,326
Electronic Chemicals	80,006		77,582
CMP Pads	22,071		20,813
Total Electronic Materials	236,798		220,721
Performance Materials:
PIM	25,907		45,141
Wood Treatment	17,323		10,674
QED	7,835		6,607
Total Performance Materials	51,065		62,422
Total	$	287,863	$	283,143

Schedule of Capital Expenditures by Segment

Capital expenditures by segment are as follows:

	Three Months Ended December 31,
	2020		2019
Capital Expenditures:
Electronic Materials	$	5,434	$	8,485
Performance Materials	1,310		16,369
Corporate	3,475		1,512
Total	$	10,219	$	26,366

Schedule of Segment Adjusted EBITDA

Adjusted EBITDA by segment is as follows:

	Three Months Ended December 31,
	2020		2019
Net income	$	31,530	$	38,549
Interest expense	9,608		11,920
Interest income	(23)		(315)
Income taxes	7,546		10,881
Depreciation and amortization	31,891		31,642
EBITDA	80,552		92,677
Charges related to asset impairment of wood treatment	7,347		—
Acquisition and integration-related expenses	2,369		2,204
Costs related to the Pandemic, net of grants received	1,262		—
Net costs related to restructuring of the wood treatment business	26		—
Costs related to KMG-Bernuth warehouse fire, net of insurance recovery	—		392
Consolidated adjusted EBITDA	$	91,556	$	95,273
Segment adjusted EBITDA:
Electronic Materials	$	80,756	$	81,198
Performance Materials	22,975		27,478
Unallocated corporate expenses	(12,175)		(13,403)
Consolidated Adjusted EBITDA	$	91,556	$	95,273