v3.25.4

Segment Information - Financial Information Related to Operations by Segment (Detail) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 31, 2025 USD ($) kt | Dec. 31, 2024 USD ($) kt | Dec. 31, 2025 USD ($) kt | Dec. 31, 2024 USD ($) kt | Mar. 31, 2025 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | $ 555,956 | $ 558,025 | $ 1,829,552 | $ 1,790,333 |
Corporate General and Administrative Expense |  | (24,010) | (20,818) | (66,109) | (54,346) |
Other Non-Operating Income |  | 1,644 | 1,381 | 3,729 | 4,788 |
Interest Expense, net |  | (13,712) | (9,061) | (34,790) | (30,459) |
Earnings before Income Taxes |  | 129,248 | 154,302 | 463,580 | 510,487 |
Capital Expenditures |  | 110,045 | 47,370 | 294,680 | 146,975 |
Depreciation, Depletion, and Amortization |  |  |  | 124,243 | 116,661 |
Segment Assets |  | 3,843,435 |  | 3,843,435 |  | $ 3,264,588
External Customers [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 555,956 | 558,025 | 1,829,552 | 1,790,333 |
Intersegment [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 33,060 | 37,316 | 102,450 | 111,428 |
Joint Venture [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 29,366 | 26,426 | 86,961 | 84,561 |
Operating Segments [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 618,382 | 621,767 | 2,018,963 | 1,986,322 |
Freight and Delivery |  | 64,378 | 64,877 | 212,007 | 212,213 |
Parts, Supplies, and Services (Includes Maintenance) |  | 71,274 | 66,090 | 230,164 | 222,681 |
Energy |  | 50,872 | 50,234 | 153,244 | 149,771 |
Raw Materials |  | 115,629 | 118,806 | 353,802 | 367,138 |
Labor and Fixed Costs |  | 75,702 | 70,263 | 225,833 | 210,834 |
Depreciation, Depletion, and Amortization | [1] | 40,126 | 38,427 | 120,707 | 114,347 |
Purchased Cement |  | 21,773 | 16,404 | 60,878 | 57,962 |
Other Segment Items |  | 13,302 | 13,866 | 101,578 | 60,872 |
Segment Profit |  | 165,326 | 182,800 | 560,750 | 590,504 |
Intersegment Eliminations [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | (33,060) | (37,316) | (102,450) | (111,428) |
Consolidation, Eliminations [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | (29,366) | (26,426) | (86,961) | (84,561) |
Cement [Member] | External Customers [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 283,496 | 259,890 | 938,475 | 873,033 |
Cement [Member] | Intersegment [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 8,309 | 9,084 | 28,226 | 29,748 |
Cement [Member] | Joint Venture [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 29,366 | 26,426 | 86,961 | 84,561 |
Cement [Member] | Operating Segments [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | $ 321,171 | $ 295,400 | $ 1,053,662 | $ 987,342 |
Cement Sales Volume | kt |  | 1,861 | 1,702 | 6,050 | 5,673 |
Operating Earnings |  | $ 91,343 | $ 86,763 | $ 292,201 | $ 291,821 |
Capital Expenditures |  | 68,271 | 35,609 | 187,303 | 102,384 |
Freight and Delivery |  | 24,868 | 21,490 | 85,672 | 76,459 |
Parts, Supplies, and Services (Includes Maintenance) |  | 48,696 | 48,748 | 165,330 | 170,959 |
Energy |  | 35,960 | 36,068 | 108,050 | 109,171 |
Raw Materials |  | 26,176 | 22,103 | 76,541 | 66,263 |
Labor and Fixed Costs |  | 43,496 | 40,869 | 130,603 | 122,819 |
Depreciation, Depletion, and Amortization | [1] | 24,169 | 23,029 | 70,231 | 68,853 |
Purchased Cement |  | 21,773 | 16,404 | 60,878 | 57,962 |
Other Segment Items |  | 4,690 | (74) | 64,156 | 23,035 |
Segment Profit |  | 91,343 | $ 86,763 | 292,201 | $ 291,821 |
Segment Assets |  | $ 2,295,110 |  | $ 2,295,110 |  | 2,172,459
Cement [Member] | Operating Segments [Member] | Wholly-Owned [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Cement Sales Volume | kt |  | 1,687 | 1,541 | 5,543 | 5,156 |
Operating Earnings |  | $ 86,923 | $ 81,776 | $ 277,668 | $ 269,842 |
Cement [Member] | Operating Segments [Member] | Joint Venture [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Cement Sales Volume | kt |  | 174 | 161 | 507 | 517 |
Operating Earnings |  | $ 4,420 | $ 4,987 | $ 14,533 | $ 21,979 |
Concrete and Aggregates [Member] | External Customers [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 68,999 | 56,405 | 224,361 | 183,373 |
Concrete and Aggregates [Member] | Intersegment [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 4,500 | 4,311 | 12,530 | 12,138 |
Concrete and Aggregates [Member] | Joint Venture [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 0 | 0 | 0 | 0 |
Concrete and Aggregates [Member] | Operating Segments [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 73,499 | 60,716 | 236,891 | 195,511 |
Capital Expenditures |  | 6,392 | 4,668 | 19,020 | 18,795 |
Freight and Delivery |  | 7,116 | 7,881 | 22,003 | 26,857 |
Parts, Supplies, and Services (Includes Maintenance) |  | 13,681 | 9,636 | 38,869 | 27,940 |
Energy |  | 2,219 | 1,836 | 7,015 | 5,841 |
Raw Materials |  | 26,127 | 26,886 | 86,261 | 89,904 |
Labor and Fixed Costs |  | 10,155 | 8,456 | 31,178 | 25,140 |
Depreciation, Depletion, and Amortization | [1] | 6,999 | 5,261 | 20,927 | 15,074 |
Purchased Cement |  | 0 | 0 | 0 | 0 |
Other Segment Items |  | 5,822 | 2,157 | 15,159 | 4,167 |
Segment Profit |  | 1,380 | (1,397) | 15,479 | 588 |
Segment Assets |  | 404,583 |  | 404,583 |  | 408,792
Gypsum Wallboard [Member] | External Customers [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 175,874 | 209,493 | 580,872 | 642,294 |
Gypsum Wallboard [Member] | Intersegment [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 0 | 0 | 0 | 0 |
Gypsum Wallboard [Member] | Joint Venture [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 0 | 0 | 0 | 0 |
Gypsum Wallboard [Member] | Operating Segments [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 175,874 | 209,493 | 580,872 | 642,294 |
Capital Expenditures |  | 29,450 | 2,560 | 76,964 | 9,925 |
Freight and Delivery |  | 32,394 | 35,506 | 104,332 | 108,853 |
Parts, Supplies, and Services (Includes Maintenance) |  | 4,998 | 4,804 | 15,609 | 13,867 |
Energy |  | 8,427 | 8,807 | 25,539 | 24,291 |
Raw Materials |  | 44,035 | 45,788 | 130,451 | 136,991 |
Labor and Fixed Costs |  | 16,584 | 15,505 | 47,723 | 46,598 |
Depreciation, Depletion, and Amortization | [1] | 5,663 | 6,414 | 18,676 | 19,338 |
Purchased Cement |  | 0 | 0 | 0 | 0 |
Other Segment Items |  | 2,416 | 6,276 | 17,237 | 21,846 |
Segment Profit |  | 61,357 | 86,393 | 221,305 | 270,510 |
Segment Assets |  | 473,720 |  | 473,720 |  | 429,268
Recycled Paperboard [Member] | External Customers [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 27,587 | 32,237 | 85,844 | 91,633 |
Recycled Paperboard [Member] | Intersegment [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 20,251 | 23,921 | 61,694 | 69,542 |
Recycled Paperboard [Member] | Joint Venture [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 0 | 0 | 0 | 0 |
Recycled Paperboard [Member] | Operating Segments [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Revenue |  | 47,838 | 56,158 | 147,538 | 161,175 |
Capital Expenditures |  | 5,174 | 4,309 | 8,111 | 12,425 |
Freight and Delivery |  | 0 | 0 | 0 | 44 |
Parts, Supplies, and Services (Includes Maintenance) |  | 3,899 | 2,902 | 10,356 | 9,915 |
Energy |  | 4,266 | 3,523 | 12,640 | 10,468 |
Raw Materials |  | 19,291 | 24,029 | 60,549 | 73,980 |
Labor and Fixed Costs |  | 5,467 | 5,433 | 16,329 | 16,277 |
Depreciation, Depletion, and Amortization | [1] | 3,295 | 3,723 | 10,873 | 11,082 |
Purchased Cement |  | 0 | 0 | 0 | 0 |
Other Segment Items |  | 374 | 5,507 | 5,026 | 11,824 |
Segment Profit |  | 11,246 | 11,041 | 31,765 | 27,585 |
Segment Assets |  | 165,992 |  | 165,992 |  | 166,673
Corporate and Other [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Capital Expenditures |  | 758 | $ 224 | 3,282 | $ 3,446 |
Segment Assets |  | $ 504,030 |  | $ 504,030 |  | $ 87,396
[1] | (1) Depreciation, Depletion, and Amortization for corporate assets w as $1,484 and $3,536 fo r the three and nine months ended December 31, 2025, respectively, and $807 and $2,314 for the three and nine months ended December 31, 2024, respectively.

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