Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - (Narrative) (Details)

v3.10.0.1
Earnings Per Share - (Narrative) (Details) - shares
shares in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Earnings Per Share [Abstract]        
Antidilutive securities excluded from computation of earnings per share, number of shares 4,509 2,730 3,943 2,772