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Revenues and Gross Profit - Total Revenues and Gross Profit by Product Line (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Product Information [Line Items] |  |
Total revenues | $ 938,955 | $ 802,004
Gross profit (loss) | 142,907 | 110,392
Interproduct Revenues |  |
Product Information [Line Items] |  |
Total revenues | (58,361) | (60,665)
Corporate |  |
Product Information [Line Items] |  |
Gross profit (loss) | (474) | 1,884
Building Materials Business |  |
Product Information [Line Items] |  |
Total revenues | 864,881 | 732,742
Building Materials Business | Operating Segments |  |
Product Information [Line Items] |  |
Total revenues | 864,881 | 732,742
Gross profit (loss) | 117,839 | 84,619
Building Materials Business | Operating Segments | Products and Services |  |
Product Information [Line Items] |  |
Total revenues | 809,131 | 688,436
Gross profit (loss) | 118,004 | 84,738
Magnesia Specialties | Operating Segments |  |
Product Information [Line Items] |  |
Total revenues | 74,074 | 69,262
Gross profit (loss) | 25,542 | 23,889
Magnesia Specialties | Operating Segments | Products and Services |  |
Product Information [Line Items] |  |
Total revenues | 69,174 | 64,869
Gross profit (loss) | 26,607 | 25,063
Aggregates | Building Materials Business | Operating Segments | Reportable Subsegments | Products and Services |  |
Product Information [Line Items] |  |
Total revenues | 541,473 | 425,016
Gross profit (loss) | 97,562 | 53,002
Cement | Building Materials Business | Operating Segments | Reportable Subsegments | Products and Services |  |
Product Information [Line Items] |  |
Total revenues | 99,017 | 89,183
Gross profit (loss) | 13,779 | 23,734
Ready Mixed Concrete | Building Materials Business | Operating Segments | Reportable Subsegments | Products and Services |  |
Product Information [Line Items] |  |
Total revenues | 211,156 | 218,537
Gross profit (loss) | 14,492 | 15,641
Asphalt and Paving | Building Materials Business | Operating Segments | Reportable Subsegments | Products and Services |  |
Product Information [Line Items] |  |
Total revenues | 15,846 | 16,365
Gross profit (loss) | (7,829) | (7,639)
Freight |  |
Product Information [Line Items] |  |
Total revenues | 60,650 | 48,699
Freight | Building Materials Business |  |
Product Information [Line Items] |  |
Total revenues | 55,750 | 44,306
Freight | Building Materials Business | Operating Segments |  |
Product Information [Line Items] |  |
Total revenues | 55,750 | 44,306
Gross profit (loss) | (165) | (119)
Freight | Magnesia Specialties | Operating Segments |  |
Product Information [Line Items] |  |
Total revenues | 4,900 | 4,393
Gross profit (loss) | $ (1,065) | $ (1,174)

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