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Unaudited Pro Forma Results (Detail) - CRS Proppants [Member] - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Business Acquisition [Line Items]    
Revenues $ 1,124,755 $ 961,006
Net Income $ 188,715 $ 107,764
Earnings per share – basis $ 3.80 $ 2.20
Earnings per share - diluted $ 3.75 $ 2.16