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Business Segments - Financial Data for Continuing Operations for Company's Reportable Business Segments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | $ 1,279,468 | $ 1,202,403 | $ 2,218,423 | $ 2,004,407 |
Earnings (Loss) from operations | 285,882 | 263,953 | 355,103 | 303,034 |
Assets employed | 10,163,657 |  | 10,163,657 |  | $ 9,551,419
Products and Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 1,196,135 | 1,128,777 | 2,074,440 | 1,882,082 |
Building Materials Business |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 1,203,229 | 1,129,441 | 2,068,110 | 1,862,183 |
Earnings (Loss) from operations | 284,589 | 263,605 | 356,613 | 306,765 |
Assets employed | 9,705,314 |  | 9,705,314 |  | 9,077,562
Building Materials Business | Products and Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 1,125,756 | 1,060,620 | 1,934,887 | 1,749,057 |
Operating Segments | Building Materials Business Mid-America Group |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 415,327 | 350,592 | 664,140 | 529,373 |
Earnings (Loss) from operations | 141,678 | 108,709 | 172,633 | 114,876 |
Assets employed | 2,906,227 |  | 2,906,227 |  | 2,788,454
Operating Segments | Building Materials Business Mid-America Group | Products and Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 382,717 | 325,578 | 613,025 | 493,468 |
Operating Segments | Building Materials Business Southeast Group |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 137,024 | 112,963 | 256,262 | 193,202 |
Earnings (Loss) from operations | 32,688 | 32,052 | 53,822 | 34,093 |
Assets employed | 1,443,402 |  | 1,443,402 |  | 1,299,469
Operating Segments | Building Materials Business Southeast Group | Products and Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 132,036 | 109,082 | 247,348 | 186,646 |
Operating Segments | Building Materials Business West Group |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 650,878 | 665,886 | 1,147,708 | 1,139,608 |
Earnings (Loss) from operations | 110,223 | 122,844 | 130,158 | 157,796 |
Assets employed | 5,355,685 |  | 5,355,685 |  | 4,989,639
Operating Segments | Building Materials Business West Group | Products and Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 611,003 | 625,960 | 1,074,514 | 1,068,943 |
Operating Segments | Magnesia Specialties |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 76,239 | 72,962 | 150,313 | 142,224 |
Earnings (Loss) from operations | 25,219 | 21,329 | 47,862 | 42,565 |
Assets employed | 176,484 |  | 176,484 |  | 156,106
Operating Segments | Magnesia Specialties | Products and Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 70,379 | 68,157 | 139,553 | 133,025 |
Operating Segments | Building Materials Business |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total Revenues | 1,203,229 | 1,129,441 | 2,068,110 | 1,862,183 |
Corporate |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Earnings (Loss) from operations | (23,926) | $ (20,981) | (49,372) | $ (46,296) |
Assets employed | $ 281,859 |  | $ 281,859 |  | $ 317,751

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