Construction Partners, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Related Parties - Schedule of Related Party Transactions (Details)

Related Parties - Schedule of Related Party Transactions (Details) - Affiliated Entity - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Sep. 30, 2019
Purchaser of Subsidiary
Related Party Transaction [Line Items]
Revenue Earned (Expense Incurred)	$ 0	$ 0	$ 0	$ 0
Accounts Receivable (Payable)	725		725		$ 756
Disposed Entity
Related Party Transaction [Line Items]
Revenue Earned (Expense Incurred)	0	0	0	0
Accounts Receivable (Payable)	462		462		846
Land Development Project
Related Party Transaction [Line Items]
Revenue Earned (Expense Incurred)	0	0	0	0
Accounts Receivable (Payable)	774		774		774
Subcontracting Services
Related Party Transaction [Line Items]
Revenue Earned (Expense Incurred)	(448)	(3,073)	(2,025)	(6,366)
Accounts Receivable (Payable)	(547)		(547)		(1,238)
Construction Services
Related Party Transaction [Line Items]
Revenue Earned (Expense Incurred)	254	1,061	1,534	1,174
Accounts Receivable (Payable)	1,643		1,643		2,434
Island Pond
Related Party Transaction [Line Items]
Revenue Earned (Expense Incurred)	(80)	(80)	(160)	(160)
Accounts Receivable (Payable)	0		0		0
Vehicle Rentals
Related Party Transaction [Line Items]
Revenue Earned (Expense Incurred)	(262)	(342)	(514)	(631)
Accounts Receivable (Payable)	0		0		0
Consulting Services
Related Party Transaction [Line Items]
Revenue Earned (Expense Incurred)	(72)	(67)	(143)	(134)
Accounts Receivable (Payable)	0		0		0
H&K, Ltd.
Related Party Transaction [Line Items]
Revenue Earned (Expense Incurred)	0	(21)	0	(42)
Accounts Receivable (Payable)	0		0		0
SunTx
Related Party Transaction [Line Items]
Revenue Earned (Expense Incurred)	(357)	$ (387)	(671)	$ (641)
Accounts Receivable (Payable)	$ 0		$ 0		$ 0