Earnings Per Share (Policy)	9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]
Earnings Per Share	Basic earnings per share (EPS) is computed by dividing net income available to common shareholders by the weighted-average number of common shares outstanding for the period. Diluted EPS is computed in the same manner as basic EPS but also reflects the potential dilution that could occur from the grant of stock-based compensation awards. The Company maintains two active share-based compensation plans that may generate additional potentially dilutive common shares. For granted and unexercised stock-settled stock appreciation rights (SSARs), dilution would occur if Company-issued SSARs were exercised and converted into common stock. As of the three and nine months ended September 30, 2020, there were 23,638 and 23,637 potentially dilutive shares related to issued and unexercised SSARs compared to 32,589 and 30,805 for the same 2019 periods, respectively. For restricted stock, dilution would occur from the Company’s previously granted but unvested shares. There were 4,981 and 3,435 potentially dilutive shares related to unvested restricted share grants as of the three and nine months ended September 30, 2020 compared to 10,412 and 9,766 for the same 2019 periods, respectively. In the computation of diluted EPS, the Company uses the treasury stock method to determine the dilutive effect of its granted but unexercised stock options and SSARs and unvested restricted stock. Under the treasury stock method, the assumed proceeds, as defined, received from shares issued in a hypothetical stock option exercise or restricted stock grant, are assumed to be used to purchase treasury stock. Proceeds include amounts received from the exercise of outstanding stock options and compensation cost for future service that the Company has not yet recognized in earnings. The Company does not consider awards from share-based grants in the computation of basic EPS.

Earnings Per Share (Policy)

9 Months Ended

Sep. 30, 2020

Basic earnings per share (EPS) is computed by dividing net income available to common shareholders by the weighted-average number of common shares outstanding for the period. Diluted EPS is computed in the same manner as basic EPS but also reflects the potential dilution that could occur from the grant of stock-based compensation awards. The Company maintains two active share-based compensation plans that may generate additional potentially dilutive common shares. For granted and unexercised stock-settled stock appreciation rights (SSARs), dilution would occur if Company-issued SSARs were exercised and converted into common stock. As of the three and nine months ended September 30, 2020, there were 23,638 and 23,637 potentially dilutive shares related to issued and unexercised SSARs compared to 32,589 and 30,805 for the same 2019 periods, respectively. For restricted stock, dilution would occur from the Company’s previously granted but unvested shares. There were 4,981 and 3,435 potentially dilutive shares related to unvested restricted share grants as of the three and nine months ended September 30, 2020 compared to 10,412 and 9,766 for the same 2019 periods, respectively.

In the computation of diluted EPS, the Company uses the treasury stock method to determine the dilutive effect of its granted but unexercised stock options and SSARs and unvested restricted stock. Under the treasury stock method, the assumed proceeds, as defined, received from shares issued in a hypothetical stock option exercise or restricted stock grant, are assumed to be used to purchase treasury stock. Proceeds include amounts received from the exercise of outstanding stock options and compensation cost for future service that the Company has not yet recognized in earnings. The Company does not consider awards from share-based grants in the computation of basic EPS.