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Stock-Based Compensation (Restricted Stock Units) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jan. 04, 2021
Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Nonvested, shares, beginning balance 1,868,440      
Nonvested, weighted-average grant date fair value, beginning balance (in dollars per share) $ 41.36      
Granted, shares 536,645      
Granted, weighted-average grant date fair value (in dollars per share) $ 85.45 $ 44.28 $ 35.51  
Vested, shares (671,926)      
Vested, weighted-average grant date fair value (in dollars per share) $ 43.75      
Forfeited, shares (76,713)      
Forfeited, weighted-average grant date fair value (in dollars per share) $ 45.92      
Nonvested, shares, ending balance 1,656,446 1,868,440    
Nonvested, weighted-average grant date fair value, ending balance (in dollars per share) $ 54.31 $ 41.36    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]        
Weighted average grant-date fair value of RSUs granted (in dollars per share) $ 85.45 $ 44.28 $ 35.51  
Total fair value of RSU's vested $ 51.8 $ 23.2 $ 9.0  
Director [Member] | Restricted Stock Units (RSUs) [Member] | Non-Employee Director Equity Plan 2014 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of restricted stock units granted to each non-employee director       3,671
Employee [Member] | Employee Equity and Incentive Plan 2017 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Measurement Period Performance-Based Restricted Stock Units 1 year      
Employee [Member] | Restricted Stock Units (RSUs) [Member] | Employee Equity and Incentive Plan 2017 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Granted, shares 500,000      
Employee [Member] | Time-based Restricted Stock Units [Member] | Employee Equity and Incentive Plan 2017 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years) 4 years      
Employee [Member] | Performance-based Restricted Stock Units Graded Vesting [Member] | Employee Equity and Incentive Plan 2017 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years) 4 years      
Employee [Member] | Performance-based Restricted Stock Units Cliff Vesting [Member] | Employee Equity and Incentive Plan 2017 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years) 3 years      
Measurement Period Additional Performance Metric Selected Performance-Based Restricted Stock Units 3 years