XML 64 R54.htm IDEA: XBRL DOCUMENT v3.10.0.1
Earnings Per Share (Narrative) (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Earnings Per Share [Abstract]        
Anti-dilutive common shares excluded from computation of earnings per share amount 350,644 497,917 353,124 507,628