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Stock Based Compensation Performance share units (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage weight of PSUs related to performance condition 80.00%    
Percentage weight of PSUs related to market condition 20.00%    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 11,000,000    
Market Condition Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense 400,000    
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount $ 200,000    
YR1 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 30,875    
YR1 [Member] | Performance Condition Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 51.82    
Compensation expense to be recognized over 3-year period at Minimum level 400,000    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized 200,000    
YR1 [Member] | Market Condition Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value 56.44    
YR2[Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number   45,771  
YR2[Member] | Performance Condition Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value   $ 42.23  
Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense 1,400,000    
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount $ 700,000    
YR2[Member] | Market Condition Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value   $ 37.51  
YR3 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number     53,692
YR3 [Member] | Performance Condition Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 63,227    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value     $ 27.62
Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense $ 1,000,000    
YR3 [Member] | Market Condition Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 12,433    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value     $ 32.52
Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense $ 300,000