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Net Sales and Operating Earningsof Fairborn Proppants (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items] |  |
Revenues | $ 366,121 | $ 297,504
Operating Earnings | 96,692 | $ 81,010
Fairborn Acquisition [Member] |  |
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items] |  |
Revenues | 22,155 |
Operating Earnings | $ 5,978 |

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