Annual report pursuant to Section 13 and 15(d)

NET INCOME (LOSS) PER SHARE - Anti-dilutive Shares Excluded from Calculation (Details)

v3.10.0.1
NET INCOME (LOSS) PER SHARE - Anti-dilutive Shares Excluded from Calculation (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive securities (in shares) 0 0 22,018
Stock options      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive securities (in shares) 0 0 4,646
Preferred stock      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive securities (in shares) 0 0 17,000
Performance stock units      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive securities (in shares) 0 0 0
Non-vested restricted stock units      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Anti-dilutive securities (in shares) 0 0 372