Quarterly report pursuant to Section 13 or 15(d)

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

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NET INCOME (LOSS) PER SHARE - Narrative (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Earnings Per Share, Basic $ 0.00 $ 0.03 $ (0.09) $ 0.02
Earnings Per Share, Diluted $ 0.00 $ 0.03 $ (0.09) $ 0.01
Stock options        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share 4.4 1.8 4.6 2.6
Restricted stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share 12.0 0.1 12.4 0.1
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 42.5 0.0 42.5 42.5
Interest rate, per annum on the principal amount 4.50% 4.50% 4.50% 4.50%
Antidilutive income excluded from computation of earnings per share $ 0.9   $ 2.7 $ 2.7
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 1.3 30.9 13.3 30.9
Interest rate, per annum on the principal amount 3.50% 3.50% 3.50% 3.50%
Antidilutive income excluded from computation of earnings per share $ 0.1 $ 1.4 $ 1.8 $ 4.3