Quarterly report pursuant to Section 13 or 15(d)

NET INCOME (LOSS) PER SHARE - Narrative (Details)

v3.5.0.2
NET INCOME (LOSS) PER SHARE - Narrative (Details) - USD ($)
shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Stock options        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares) 1.6 4.6 2.8 4.7
Restricted stock units        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares) 3.5 12.1 6.6 12.6
4.50% convertible subordinated notes        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares) 42.5 42.5 42.5 42.5
Interest rate, per annum on the principal amount (percent) 4.50%   4.50%  
Anti-dilutive income excluded from computations $ 0.9 $ 0.9 $ 1.8 $ 1.8
3.50% convertible subordinated notes        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares)   19.3   19.3
Interest rate, per annum on the principal amount (percent)   3.50%   3.50%
Anti-dilutive income excluded from computations   $ 0.9   $ 1.8