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Segment Information - Additional Information (Detail) $ in Millions	9 Months Ended
	Dec. 31, 2019 USD ($) Location Facility Terminal Plant Sector Segment
Segment Reporting [Abstract]
Number of sectors \| Sector	3
Number of reportable business segments \| Segment	5
Cement plant locations \| Location	7
Slag grinding facility \| Facility	1
Cement distribution terminals \| Terminal	19
Gypsum wallboard plants \| Plant	5
Readymix concrete batch plants \| Plant	25
Aggregates processing 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	5
Proportionate consolidation of share of Joint Venture's revenues and operating earnings	50.00%
Accrued capital expenditures \| $	$ 2.7