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v3.23.1

Property, Plant and Equipment | 6 Months Ended
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Mar. 31, 2023
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | Property, Plant and Equipment Property, plant and equipment at March 31, 2023 and September 30, 2022 consisted of the following (in thousands):
|  | March 31, 2023 |  | September 30, 2022
|  | (unaudited) |  |
Construction equipment |  | $ | 444,027 |  |  | $ | 402,581 |
Plants |  | 182,917 |  |  | 167,625 |
Mineral reserves |  | 69,466 |  |  | 91,992 |
Land and improvements |  | 70,038 |  |  | 59,454 |
Buildings |  | 33,656 |  |  | 32,566 |
Furniture and fixtures |  | 7,476 |  |  | 7,110 |
Leasehold improvements |  | 1,257 |  |  | 1,230 |
Total property, plant and equipment, gross |  | 808,837 |  |  | 762,558 |
Accumulated depreciation, depletion and amortization |  | (336,220) |  |  | (304,935) |
Construction in progress |  | 30,368 |  |  | 23,789 |
Total property, plant and equipment, net |  | $ | 502,985 |  |  | $ | 481,412 |
Depreciation, depletion and amortization expense related to property, plant and equipment was $20.4 million and $17.0 million for the three months ended March 31, 2023 and 2022, respectively, and $39.7 million and $32.8 million for the six months ended March 31, 2023 and 2022, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI https://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126982197&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916 + Details
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