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Subsequent Events (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 03, 2022
Jan. 03, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 02, 2021
Subsequent Event [Line Items]          
Dividends payable, amount per share         $ 0.16
Dividends payable, date of record     Feb. 11, 2022    
Dividends Payable, Date Declared     Dec. 02, 2021    
Dividends Payable, Date to be Paid     Mar. 04, 2022    
Subsequent Event [Member]          
Subsequent Event [Line Items]          
Dividends payable, amount per share $ 0.16        
Dividends payable, date of record May 13, 2022        
Dividends Payable, Date Declared Mar. 03, 2022        
Dividends Payable, Date to be Paid Jun. 03, 2022        
Charter DMN Holdings, LP [Member] | Dallas, Texas [Member]          
Subsequent Event [Line Items]          
Proceeds from interest payment by Purchaser     $ 1,008 $ 897  
Charter DMN Holdings, LP [Member] | Dallas, Texas [Member] | Subsequent Event [Member]          
Subsequent Event [Line Items]          
Proceeds from interest payment by Purchaser   $ 254