Quarterly report pursuant to Section 13 or 15(d)

Net Income (Loss) Per Share - Anti-dilutive Shares Excluded from Diluted Earnings (Loss) Per Share Calculation (Details)

v3.7.0.1
Net Income (Loss) Per Share - Anti-dilutive Shares Excluded from Diluted Earnings (Loss) Per Share Calculation (Details) - shares
shares in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive securities (in shares) 1,282 3,743 5,502 3,743
Stock options        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive securities (in shares) 793 3,371 4,640 3,371
Performance stock units        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive securities (in shares) 170 0 170 0
Non-vested restricted stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Anti-dilutive securities (in shares) 319 372 692 372