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Business Segments - Financial Data for Continuing Operations for Company's Reportable Business Segments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | $ 1,420,246 | $ 1,219,640 | $ 3,638,668 | $ 3,224,047 |
Earnings (Loss) from operations | 345,263 | 240,662 | 700,365 | 543,696 |
Assets employed | 10,223,485 |  | 10,223,485 |  | $ 9,551,419
Products and Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 1,323,160 | 1,142,218 | 3,397,599 | 3,024,300 |
Building Materials Business |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 1,355,369 | 1,146,117 | 3,423,478 | 3,008,300 |
Earnings (Loss) from operations | 347,556 | 238,806 | 704,169 | 545,570 |
Assets employed | 9,744,319 |  | 9,744,319 |  | 9,077,562
Building Materials Business | Products and Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 1,263,826 | 1,073,853 | 3,198,713 | 2,822,910 |
Operating Segments | Building Materials Business Mid-America Group |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 448,758 | 377,005 | 1,112,897 | 906,377 |
Earnings (Loss) from operations | 159,711 | 120,344 | 332,344 | 235,221 |
Assets employed | 2,904,439 |  | 2,904,439 |  | 2,788,454
Operating Segments | Building Materials Business Mid-America Group | Products and Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 411,045 | 348,429 | 1,024,069 | 841,897 |
Operating Segments | Building Materials Business Southeast Group |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 134,138 | 125,547 | 390,399 | 318,749 |
Earnings (Loss) from operations | 31,463 | 26,372 | 85,285 | 60,464 |
Assets employed | 1,447,293 |  | 1,447,293 |  | 1,299,469
Operating Segments | Building Materials Business Southeast Group | Products and Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 129,619 | 121,661 | 376,967 | 308,306 |
Operating Segments | Building Materials Business West Group |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 772,473 | 643,565 | 1,920,182 | 1,783,174 |
Earnings (Loss) from operations | 156,382 | 92,090 | 286,540 | 249,885 |
Assets employed | 5,392,587 |  | 5,392,587 |  | 4,989,639
Operating Segments | Building Materials Business West Group | Products and Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 723,162 | 603,763 | 1,797,677 | 1,672,707 |
Operating Segments | Magnesia Specialties |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 64,877 | 73,523 | 215,190 | 215,747 |
Earnings (Loss) from operations | 20,097 | 23,301 | 67,959 | 65,867 |
Assets employed | 163,095 |  | 163,095 |  | 156,106
Operating Segments | Magnesia Specialties | Products and Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 59,334 | 68,365 | 198,886 | 201,390 |
Operating Segments | Building Materials Business |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 1,355,369 | 1,146,117 | 3,423,478 | 3,008,300 |
Corporate |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Earnings (Loss) from operations | (22,390) | $ (21,445) | (71,763) | $ (67,741) |
Assets employed | $ 316,071 |  | $ 316,071 |  | $ 317,751

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