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Segment Information - Additional Information (Detail) $ in Millions | 9 Months Ended
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Dec. 31, 2020 USD ($) Location Facility Terminal Plant Sector Segment
Segment Reporting [Abstract] |
Number of sectors | Sector | 2
Number of reportable business segments | Segment | 4
Cement plant locations | Location | 8
Slag grinding facility | Facility | 1
Cement distribution terminals | Terminal | 29
Readymix concrete batch plants | 20
Aggregates processing plants | 3
Gypsum wallboard plants | 5
Proportionate consolidation of share of joint venture revenues and operating earnings | 50.00%
Accrued capital expenditures | $ | $ 2.7

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