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Stock Compensation - Narrative (Details) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Anti-dilutive awards outstanding (fewer than) (in shares) 105,000,000   105,000 105,000 105,000
Relative Total Shareholder Return Awards (RTSRs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share performance period       3 years  
Bottom portion of peer percent group (as a percent) 25.00%        
Top portion of peer percent group (as a percent) 25.00%        
Relative Total Shareholder Return Awards (RTSRs) | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares, issued (in shares) 0        
Relative Total Shareholder Return Awards (RTSRs) | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares issued (as a percent) 150.00%        
Employee | Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares) 11,000 70,000   81,000  
Restricted stock units granted (in dollars per share) $ 52.70 $ 48.47      
Employee | Relative Total Shareholder Return Awards (RTSRs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)   40,000      
Restricted stock units granted (in dollars per share)   $ 56.32      
Director | Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)   14,000      
Restricted stock units granted (in dollars per share)   $ 48.47