SEGMENT REPORTING (Tables)

9 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Schedule of segment revenue

Revenue from external customers by segment are as follows:

	Three Months Ended June 30,				Nine Months Ended June 30,
	2020		2019		2020		2019
Segment Revenue:
Electronic Materials:
CMP Slurries	$	117,680	$	108,617	$	359,828	$	345,244
Electronic Chemicals	78,614		80,103		234,693		198,474
CMP Pads	24,073		23,403		65,476		71,868
Total Electronic Materials	220,367		212,123		659,997		615,586
Performance Materials	54,360		59,759		182,066		143,465
Total	$	274,727	$	271,882	$	842,063	$	759,051

Schedule of capital expenditures by segment

Capital expenditures by segment are as follows:

	Three Months Ended June 30,				Nine Months Ended June 30,
	2020		2019		2020		2019
Capital Expenditures:
Electronic Materials	$	6,141	$	11,293	$	19,720	$	27,842
Performance Materials	33,550		1,286		79,247		2,909
Corporate	3,900		852		8,967		3,096
Total	$	43,591	$	13,431	$	107,934	$	33,847

Schedule of segment adjusted EBITDA

Adjusted EBITDA by segment is as follows:

	Three Months Ended June 30,				Nine Months Ended June 30,
	2020		2019		2020		2019
Segment adjusted EBITDA:
Electronic Materials	$	76,855	$	70,859	$	227,662	$	220,594
Performance Materials	26,959		27,425		84,370		63,152
Unallocated corporate expenses	(11,773)		(12,527)		(38,226)		(35,621)
Interest expense	(10,406)		(12,757)		(33,079)		(32,978)
Interest income	131		417		589		2,004
Depreciation and amortization	(31,324)		(26,587)		(95,516)		(70,476)
Acquisition and integration-related expenses	(2,735)		(2,910)		(7,785)		(33,108)
Charge for fair value write-up of acquired inventory sold	—		(42)		—		(14,869)
Costs related to KMG-Bernuth warehouse fire, net of insurance recovery	(622)		(4,450)		(1,220)		(4,450)
Net costs related to restructuring of the wood treatment business	293		—		293		—
Costs related to the Pandemic, net of grants received	(112)		—		(349)		—
Income before income taxes	$	47,266	$	39,428	$	136,739	$	94,248