Business Segments (Details) $ in Thousands		3 Months Ended
	Oct. 29, 2018 segment	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($)	Sep. 30, 2021 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	3	2
Segment Reporting Information [Line Items]
Revenue from product sales and services		$ 366,268	$ 322,193
Operating profit (loss)		14,288	16,234
Interest expense		(6,579)	(8,673)
Income before income taxes		7,709	7,561
Income tax (expense) benefit		(1,621)	(1,084)
Net income		6,088	6,477
Assets		1,867,601		$ 1,868,891
Integrated Solutions and Services
Segment Reporting Information [Line Items]
Revenue from product sales and services		245,046	214,717
Applied Product Technologies
Segment Reporting Information [Line Items]
Revenue from product sales and services		121,222	107,476
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenue from product sales and services		29,805	18,141
Intersegment Eliminations | Integrated Solutions and Services
Segment Reporting Information [Line Items]
Revenue from product sales and services		8,530	2,036
Intersegment Eliminations | Applied Product Technologies
Segment Reporting Information [Line Items]
Revenue from product sales and services		21,275	16,105
Operating Segments
Segment Reporting Information [Line Items]
Total revenue		396,073	340,334
Operating Segments | Integrated Solutions and Services
Segment Reporting Information [Line Items]
Total revenue		253,576	216,753
Revenue from product sales and services		245,046
Operating profit (loss)		35,300	26,357
Assets		870,124		887,265
Operating Segments | Applied Product Technologies
Segment Reporting Information [Line Items]
Total revenue		142,497	123,581
Revenue from product sales and services		121,222
Operating profit (loss)		17,827	13,380
Assets		636,832		656,362
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Operating profit (loss)		(38,839)	$ (23,503)
Assets		$ 360,645		$ 325,264