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Business Combinations and Discontinued Operations - Additional Information (Detail) $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 01, 2021 USD ($) | Jul. 30, 2021 | Apr. 30, 2021 | Oct. 31, 2021 USD ($) Plant | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |
Cash used for operating and investing activities for discontinued operations |  |  |  |  | $ 14.0 |
Capital expenditures |  |  |  |  | 8.6 |
Business combination number of California ready mix operations | Plant |  |  |  | 14 |  |
Total Revenues |  |  |  | $ 250.0 | 1,230.8 | $ 982.4
Cement and California Ready Mix Businesses |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Amortization or depreciation expense |  |  |  |  | $ 0.0 |
Lehigh West Region |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, effective date | 2021-10 |  |  |  |  |
Cash transferred in business combination | $ 2,260.0 |  |  |  |  |
Southern Crushed Concrete |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, effective date |  | 2021-07 |  |  |  |
Tiller Corporation |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, effective date |  |  | 2021-04 |  |  |

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