Quarterly report pursuant to Section 13 or 15(d)

Earnings per Share - Additional Information (Details)

v3.10.0.1
Earnings per Share - Additional Information (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Earnings Per Share [Abstract]        
Participating securities (in shares) 0 0 0 0
Anti-dilutive common stock equivalents (in shares) 24,191,000 35,468,000 45,032,000 35,447,000