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

Settlement Agreement	3 Months Ended
Settlement Agreement	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Settlement Agreement	Settlement AgreementOn April 19, 2018, certain of the Company’s subsidiaries entered into settlement agreements with a third party arising from a business interruption event not directly related to the Company’s business that the Company does not expect to reoccur (the “Settlement”). The Settlement provides for the Company’s subsidiaries to receive aggregate net payments of approximately $15.7 million in four equal installments between January 2019 and July 2020, in exchange for releasing and waiving all current and future claims against the third party. The Company recorded a pre-tax gain of $14.8 million during the fiscal year ended September 30, 2018 related to the Settlement. Future payments are reflected on the Consolidated Balance Sheet at December 31, 2019 and September 30, 2019 as other current assets in the amount of $7.8 million.