Construction Partners, Inc. Annual report pursuant to Section 13 and 15(d)

Other Comprehensive Income - Schedule of Reclassification of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest expense	$ 1,300
Provision for income taxes	8,349	$ 12,760	$ 13,909
Reclassification out of Accumulated Other Comprehensive Income \| Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest expense	224	0	0
Provision for income taxes	(56)	0	0
Total reclassifications from AOCI to earnings	$ 168	$ 0	$ 0

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.