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Segment Information - Additional Information (Detail) $ in Millions | 3 Months Ended
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Jun. 30, 2020 Location Facility Terminal Plant Sector Segment | Jun. 30, 2019 USD ($)
Segment Reporting [Abstract] |  |
Number of sectors | Sector | 3 |
Number of reportable business segments | Segment | 5 |
Cement plant locations | Location | 8 |
Slag grinding facility | Facility | 1 |
Cement distribution terminals | Terminal | 29 |
Readymix concrete batch plants | Plant | 23 |
Aggregates processing plants | Plant | 4 |
Gypsum wallboard plants | Plant | 5 |
Number of frac sand processing facilities | Facility | 2 |
Number of frac sand drying facilities | Facility | 4 |
Number of frac sand trans-load locations | Location | 2 |
Proportionate consolidation of share of joint venture revenues and operating earnings | 50.00% |
Accrued capital expenditures | $ |  | $ 3.7

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- Definition Gypsum wallboard plants. + References No definition available. + Details
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- Definition Slag grinding facility. + References No definition available. + Details
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- Definition Future cash outflow to pay for purchases of fixed assets that have occurred. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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