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Schedule of Inventories (Detail) - USD ($) $ in Thousands | Mar. 31, 2025 | Mar. 31, 2024
--- | --- | ---
Inventory [Line Items] |  |
Inventories | $ 415,175 | $ 373,923
Raw Materials and Material-in-Progress [Member] |  |
Inventory [Line Items] |  |
Inventories | 164,683 | 122,772
Finished Cement [Member] |  |
Inventory [Line Items] |  |
Inventories | 67,711 | 71,396
Aggregates [Member] |  |
Inventory [Line Items] |  |
Inventories | 17,681 | 12,149
Gypsum Wallboard [Member] |  |
Inventory [Line Items] |  |
Inventories | 5,708 | 5,242
Recycled Paperboard [Member] |  |
Inventory [Line Items] |  |
Inventories | 7,814 | 14,278
Repair Parts and Supplies [Member] |  |
Inventory [Line Items] |  |
Inventories | 126,983 | 127,511
Fuel and Coal [Member] |  |
Inventory [Line Items] |  |
Inventories | $ 24,595 | $ 20,575

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