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Unaudited Pro Forma Results (Detail) - CRS Proppants [Member] - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2014
Sep. 30, 2014
Business Acquisition [Line Items]    
Revenues $ 319,179 $ 597,932
Net Income $ 60,669 $ 91,868
Earnings per share - basic $ 1.22 $ 1.85
Earnings per share - diluted $ 1.20 $ 1.82