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Net Sales and Operating Loss of CRS Proppants (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items] |  |  |  |
Revenues | $ 328,988 | $ 284,808 | $ 613,951 | $ 551,059
Operating Loss | 56,546 | $ 87,995 | 125,908 | $ 154,875
CRS Proppants [Member] |  |  |  |
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items] |  |  |  |
Revenues | 12,455 |  | 31,224 |
Operating Loss | $ (41,257) |  | $ (46,066) |

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