SEGMENT REPORTING (Tables)

6 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Schedule of segment revenue

Revenue from external customers by segment are as follows:

	Three Months Ended March 31,				Six Months Ended March 31,
	2020		2019		2020		2019
Segment Revenue:
Electronic Materials:
CMP Slurries	$	119,822	$	110,299	$	242,148	$	236,627
Electronic Chemicals	78,497		78,549		156,079		118,371
CMP Pads	20,590		23,998		41,403		48,464
Total Electronic Materials	218,909		212,846		439,630		403,462
Performance Materials	65,284		52,545		127,706		83,707
Total	$	284,193	$	265,391	$	567,336	$	487,169

Schedule of capital expenditures by segment

Capital expenditures by segment are as follows:

	Three Months Ended March 31,				Six Months Ended March 31,
	2020		2019		2020		2019
Capital Expenditures:
Electronic Materials	$	5,094	$	10,150	$	13,579	$	16,549
Performance Materials	29,328		1,363		45,697		1,623
Corporate	3,555		1,018		5,067		2,244
Total	$	37,977	$	12,531	$	64,343	$	20,416

Schedule of segment adjusted EBITDA

Adjusted EBITDA by segment are as follows:

	Three Months Ended March 31,				Six Months Ended March 31,
	2020		2019		2020		2019
Segment adjusted EBITDA:
Electronic Materials	$	69,603	$	74,910	$	150,807	$	149,735
Performance Materials	29,932		22,660		57,411		35,727
Unallocated corporate expenses	(13,604)		(12,052)		(26,453)		(23,094)
Interest expense	(10,753)		(13,331)		(22,673)		(20,221)
Interest income	143		568		458		1,587
Depreciation and amortization	(32,550)		(27,348)		(64,192)		(43,889)
Acquisition and integration-related expenses	(2,285)		(2,904)		(5,050)		(30,198)
Charge for fair value write-up of acquired inventory sold	—		(4,566)		—		(14,827)
Costs related to KMG-Bernuth warehouse fire (See Note 13) and restructuring of wood treatment business	(206)		—		(598)		—
Costs related to the Pandemic	(237)		—		(237)		—
Income before income taxes	$	40,043	$	37,937	$	89,473	$	54,820