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Shareholders' Equity (Narrative) (Details) - $ / shares
6 Months Ended
Jun. 30, 2019
May 09, 2019
Dec. 31, 2018
Shareholders' Equity [Line Items]      
Dividends payable, date declared May 09, 2019    
Dividends payable, amount per share   $ 0.08  
Dividends payable, date of record Aug. 16, 2019    
Dividends payable, date to be paid Sep. 06, 2019    
Stock repurchase program, number of shares authorized to be repurchased 1,500,000    
Series A      
Shareholders' Equity [Line Items]      
Common stock, shares, outstanding 19,025,788   19,157,358
Series B      
Shareholders' Equity [Line Items]      
Common stock, shares, outstanding 2,469,512   2,469,555