NET INCOME PER SHARE (Details) - USD ($) shares in Thousands, $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 15, 2015
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]
Anti-dilutive potential common shares (in thousands of shares)	5,395	6,178
Options
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]
Anti-dilutive potential common shares (in thousands of shares)	4,218	5,227
Non-vested restricted stock units
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]
Anti-dilutive potential common shares (in thousands of shares)	1,177	951
Convertible Debt [Member]
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]
Convertible Notes Payable, Noncurrent			$ 125