Segment Information - Schedule of Revenues from External Customers by Geographical Areas (Details) $ in Thousands	12 Months Ended
	Sep. 30, 2022 USD ($) segment	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Reportable segments | segment	1
Revenues	$ 532,582	$ 470,559	$ 518,499
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	404,973	351,422	397,983
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	81,218	68,655	66,064
Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	20,712	26,615	18,162
Asia/Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,885	8,889	18,079
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	17,699	13,027	15,866
Mexico, Central and South America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 3,095	$ 1,951	$ 2,345