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Stock-Based Compensation - Narrative (Details) - $ / shares
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 29, 2020
Jun. 30, 2020
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum number of shares authorized (shares)   9,700,000 9,700,000
2020 Grant      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance Based Criteria Plan Payout Percentage, Over/Under     20.00%
Restricted Stock Awards Service Condition      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted (shares) 80,876 0  
Shares granted (USD per share) $ 149.49    
Stock Appreciation Rights SARS      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted (shares) 250,080 0  
Award vesting period     3 years
Award, expiration period     10 years
Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted (USD per share) $ 143.45    
Award performance period     3 years
Shares outstanding (shares) 63,868 0 0
Performance Shares | 2020 Grant      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted (USD per share)     $ 143.45
Performance Shares | Minimum | 2020 Grant      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance based criteria plan payout percentage     0.00%
Performance Shares | Maximum | 2020 Grant      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance based criteria plan payout percentage     200.00%