Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - (Narrative) (Details)

v3.8.0.1
Earnings Per Share - (Narrative) (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Earnings Per Share [Abstract]        
Antidilutive securities excluded from computation of earnings per share, number of shares 2,835 2,517 2,793 2,491