Quarterly report pursuant to Section 13 or 15(d)

Net Income (Loss) Per Share (Narrative) (Details)

v3.20.2
Net Income (Loss) Per Share (Narrative) (Details) - shares
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Stock Compensation Plan [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Dilutive effect of outstanding stock options and shares associated with long-term incentive compensation plans 89,561 51,042 0 8,678
Shares not included in the computation of diluted earnings per share   936,817   1,150,865
Employee Stock Option [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Dilutive effect of outstanding stock options and shares associated with long-term incentive compensation plans     0  
Shares not included in the computation of diluted earnings per share 791,415   727,915  
Performance Units [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Shares not included in the computation of diluted earnings per share 110,308 200,260 110,308 200,260