Schedule of Inventories (Detail) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Inventory [Line Items] | ||
| Inventories | $ 408,391 | $ 415,175 |
| Raw Materials and Material-in-Progress [Member] | ||
| Inventory [Line Items] | ||
| Inventories | 158,829 | 164,683 |
| Finished Cement [Member] | ||
| Inventory [Line Items] | ||
| Inventories | 63,293 | 67,711 |
| Aggregates [Member] | ||
| Inventory [Line Items] | ||
| Inventories | 16,073 | 17,681 |
| Gypsum Wallboard [Member] | ||
| Inventory [Line Items] | ||
| Inventories | 4,809 | 5,708 |
| Recycled Paperboard [Member] | ||
| Inventory [Line Items] | ||
| Inventories | 10,675 | 7,814 |
| Repair Parts and Supplies [Member] | ||
| Inventory [Line Items] | ||
| Inventories | 135,110 | 126,983 |
| Fuel and Coal [Member] | ||
| Inventory [Line Items] | ||
| Inventories | $ 19,602 | $ 24,595 |