Earnings Per Share (Notes)

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Earnings Per Share

(3) Earnings Per Share

We compute basic earnings per share by dividing net income for the period by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per share is computed by dividing the net income for the period by the weighted average number of shares of common stock outstanding during the period and including the dilutive effect of common stock that would be issued assuming exercise of stock-based compensation awards.

The effects of approximately 3 million total restricted stock units ("RSUs"), and performance restricted stock units ("PRSUs") outstanding at March 31, 2017 have been included in the computation of diluted earnings per share for the three months ended March 31, 2017. Less than 1 million of PRSUs granted in 2016 were excluded from the computation of diluted earnings per share for the three months ended March 31, 2017, as they were contingently issuable and no shares would have been issued if these periods were the end of the contingency period. The effect of approximately 4 million total outperform stock appreciation rights ("OSOs"), RSUs and PRSUs outstanding at March 31, 2016 was included in the computation of diluted earnings per share for the three months ended March 31, 2016.