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Revenues and Gross Profit - Total Revenues and Gross Profit by Product Line (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Product Information [Line Items] |  |  |  |
Total revenues | $ 1,420,246 | $ 1,219,640 | $ 3,638,668 | $ 3,224,047
Gross profit (loss) | 420,645 | 312,984 | 920,418 | 739,293
Interproduct Revenues |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | (77,419) | (66,839) | (203,554) | (205,681)
Corporate |  |  |  |
Product Information [Line Items] |  |  |  |
Gross profit (loss) | 1,725 | (579) | 1,446 | 4,474
Building Materials Business |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 1,355,369 | 1,146,117 | 3,423,478 | 3,008,300
Building Materials Business | Operating Segments |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 1,355,369 | 1,146,117 | 3,423,478 | 3,008,300
Gross profit (loss) | 395,910 | 287,816 | 842,382 | 661,343
Building Materials Business | Operating Segments | Products and Services |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 1,263,826 | 1,073,853 | 3,198,713 | 2,822,910
Gross profit (loss) | 395,593 | 287,863 | 842,004 | 660,911
Magnesia Specialties | Operating Segments |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 64,877 | 73,523 | 215,190 | 215,747
Gross profit (loss) | 23,010 | 25,747 | 76,590 | 73,476
Magnesia Specialties | Operating Segments | Products and Services |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 59,334 | 68,365 | 198,886 | 201,390
Gross profit (loss) | 23,997 | 26,823 | 79,816 | 76,756
Aggregates | Building Materials Business | Operating Segments | Reportable Subsegments | Products and Services |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 818,693 | 691,822 | 2,121,443 | 1,785,961
Gross profit (loss) | 287,024 | 209,666 | 636,505 | 461,912
Cement | Building Materials Business | Operating Segments | Reportable Subsegments | Products and Services |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 119,609 | 98,223 | 330,976 | 300,554
Gross profit (loss) | 48,519 | 32,543 | 104,526 | 97,582
Ready Mixed Concrete | Building Materials Business | Operating Segments | Reportable Subsegments | Products and Services |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 271,844 | 254,686 | 724,179 | 750,424
Gross profit (loss) | 28,948 | 20,632 | 62,454 | 66,226
Asphalt and Paving | Building Materials Business | Operating Segments | Reportable Subsegments | Products and Services |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 131,099 | 95,961 | 225,669 | 191,652
Gross profit (loss) | 31,102 | 25,022 | 38,519 | 35,191
Freight |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 97,086 | 77,422 | 241,069 | 199,747
Freight | Building Materials Business |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 91,543 | 72,264 | 224,765 | 185,390
Freight | Building Materials Business | Operating Segments |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 91,543 | 72,264 | 224,765 | 185,390
Gross profit (loss) | 317 | (47) | 378 | 432
Freight | Magnesia Specialties | Operating Segments |  |  |  |
Product Information [Line Items] |  |  |  |
Total revenues | 5,543 | 5,158 | 16,304 | 14,357
Gross profit (loss) | $ (987) | $ (1,076) | $ (3,226) | $ (3,280)

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