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Equity (Stock-Based Compensation Plans - Narrative) (Details) - shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
2015 Stock Plan        
Equity - Stock-based Compensation Plans [Line Items]        
Aggregate number of shares authorized for issuance   33,701,004    
Other Stock And Incentive Plans        
Equity - Stock-based Compensation Plans [Line Items]        
Deferred shares   806,715    
2015 Director Stock Plan        
Equity - Stock-based Compensation Plans [Line Items]        
Aggregate number of shares authorized for issuance   1,548,274    
Other Director Stock Plans        
Equity - Stock-based Compensation Plans [Line Items]        
Deferred shares   298,808    
Stock Options        
Equity - Stock-based Compensation Plans [Line Items]        
Award Expiration Date   10 years 10 years 10 years
Stock Options | Maximum        
Equity - Stock-based Compensation Plans [Line Items]        
Vesting period   3 years    
Stock Options | Liability Awards Plan        
Equity - Stock-based Compensation Plans [Line Items]        
Paid   0    
Performance Shares        
Equity - Stock-based Compensation Plans [Line Items]        
Paid   (1,068,099)    
Performance Factor     91.40%  
Performance Shares | Scenario, Forecast        
Equity - Stock-based Compensation Plans [Line Items]        
Paid (1,266,651)      
Performance Shares | Minimum        
Equity - Stock-based Compensation Plans [Line Items]        
Future Performance Factor   0.00%    
Performance Shares | Maximum        
Equity - Stock-based Compensation Plans [Line Items]        
Future Performance Factor   175.00%    
Performance Shares | Liability Awards Plan        
Equity - Stock-based Compensation Plans [Line Items]        
Paid   (166,191)    
Performance Shares | Liability Awards Plan | Scenario, Forecast        
Equity - Stock-based Compensation Plans [Line Items]        
Paid (170,214)