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 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 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 0 2,530 0 0
Shares not included in the computation of diluted earnings per share   1,173,365   1,223,365
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   0  
Shares not included in the computation of diluted earnings per share 614,114   634,114  
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 117,688 207,573 117,688 207,573