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Stock-based Compensation Restricted Stock Unit Activity (Details)
 9 Months Ended
Dec. 31, 2015
$ / shares
shares
Mar. 31, 2015
Stock-based Compensation Restricted Stock Unit Activity Details    
Balance at beginning of period | shares 2,698,686  
Granted | shares 2,516,522  
Vested | shares (529,797)  
Forfeited | shares (175,815)  
Balance at end of period | shares 4,509,596  
RSU weighted-average remaining contractual term, in years 1.82 1.88
Beginning of period, weighted-average purchase price | $ / shares $ 7.33  
Granted, weighted-average purchase price | $ / shares 8.67  
Vested, weighted-average purchase price | $ / shares 7.62  
Forfeited, weighted-average purchase price | $ / shares 7.98  
End of period, weighted-average purchase price | $ / shares $ 8.02