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Stock-based Compensation, Summary of Plans (Details) - shares
6 Months Ended
Jun. 30, 2021
Dec. 31, 2018
Restricted Stock [Member]    
Stock-based Compensation [Abstract]    
Restricted stock outstanding (in shares) 0  
2018 LTIP [Member]    
Stock-based Compensation [Abstract]    
Contractual term of option awards 10 years  
Maximum number of shares that can be awarded (in shares)   1,293,109
Aggregate number of shares awarded to date under the plan (in shares) 490,007  
Shares available for awards (in shares) 803,102  
2018 LTIP [Member] | Officers and Employees [Member] | Restricted Stock [Member]    
Stock-based Compensation [Abstract]    
Restricted stock award (in shares) 0