Quarterly report pursuant to Section 13 or 15(d)

NET INCOME (LOSS) PER SHARE - Anti-dilutive shares excluded from the computations of diluted net income (loss) (Details)

v3.6.0.2
NET INCOME (LOSS) PER SHARE - Anti-dilutive shares excluded from the computations of diluted net income (loss) (Details) - USD ($)
shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Stock options        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Weighted average shares excluded (shares) 1.4 4.4 2.3 4.6
Unvested restricted stock units        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Weighted average shares excluded (shares) 3.1 12.0 3.8 12.4
4.50% convertible subordinated notes        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Weighted average shares excluded (shares) 40.9 42.5 42.0 42.5
Interest expense excluded $ 0.9 $ 0.9 $ 2.7 $ 2.7
Stated interest rate 4.50%   4.50%  
3.50% convertible subordinated notes        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Weighted average shares excluded (shares) 0.0 1.3 0.0 13.3
Interest expense excluded $ 0.0 $ 0.1 $ 0.0 $ 1.8
Stated interest rate 3.50%   3.50%