Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024
Inventory [Line Items]
Inventories	$ 371,619	$ 373,923
Raw Materials and Material-in-Progress [Member]
Inventory [Line Items]
Inventories	126,351	122,772
Finished Cement [Member]
Inventory [Line Items]
Inventories	69,507	71,396
Aggregates [Member]
Inventory [Line Items]
Inventories	13,983	12,149
Gypsum Wallboard [Member]
Inventory [Line Items]
Inventories	6,914	5,242
Recycled Paperboard [Member]
Inventory [Line Items]
Inventories	10,007	14,278
Repair Parts and Supplies [Member]
Inventory [Line Items]
Inventories	122,247	127,511
Fuel and Coal [Member]
Inventory [Line Items]
Inventories	$ 22,610	$ 20,575