Earnings Per Share Earnings Per Share (Policies)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Earnings Per Share, Policy [Policy Text Block]

Basic earnings per share is computed by dividing net income attributable to common stockholders by the weighted average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing net income attributable to common shareholders by the weighted average number of common shares outstanding, including the effect of issuing common stock assuming (i) stock options are exercised, and (ii) performance share awards and restricted stock awards are fully vested under the treasury stock method.