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Components of Basic and Diluted Loss Per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Earnings Per Share [Abstract]    
Net loss available to common shareholders $ (89,097) $ (15,052)
Weighted average outstanding shares of common stock, basic 47,067,715 46,981,747
Weighted average common stock and equivalents 47,067,715 46,981,747
Loss per share, basic [1] $ (1.89) $ (0.32)
Loss per share, diluted [2] $ (1.89) $ (0.32)
Antidilutive incremental options and restricted stock awards and units 475,873 268,227
[1] The company calculates “Loss per share, basic” by dividing “Net loss available to common shareholders” by “Weighted average outstanding share of common stock, basic”.
[2] The company calculates “Loss per share, diluted” by dividing “Net loss available to common shareholders” by “Weighted average common stock and equivalents”.