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Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Feb. 28, 2019 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Property, Plant and Equipment [Line Items] |  |  |  |  |
Depreciation, depletion and amortization expense |  |  |  | $ 22,698 | $ 17,929
Asphalt Terminal |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Purchase price | $ 10,800 |  |  |  |
Acquisition costs incurred | $ 100 |  |  |  |
Depreciation, depletion and amortization expense |  | $ 7,800 | $ 6,500 | $ 22,100 | $ 17,600

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- Definition Asset Acquisition, Transaction Costs + References No definition available. + Details
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- Definition Payments For Asset Acquisitions + References No definition available. + Details
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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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