Business Combinations - Pro Forma Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Business Acquisition [Line Items]
Basic (in shares)		12,812		12,779
Grove Resource Solutions, LLC
Business Acquisition [Line Items]
Revenue		$ 94,326	$ 301,481	$ 407,795
Net income (loss)		$ 4,603	$ 4,683	$ 15,455
Basic (in shares)	13,854	12,812	13,638	12,779
Diluted (in shares)	14,539	14,235	14,421	14,205
Basic earnings per share (loss) (in dollars per share)		$ 0.36	$ 0.34	$ 1.21
Diluted earnings per share (loss) (in dollars per share)		$ 0.32	$ 0.32	$ 1.09