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Stock Incentive Plans (Changes in the Stock Options Outstanding) (Details) - Employee Stock Option [Member] - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Number of Options        
Outstanding, at the beginning     80,783  
Issued 40,000 0 66,000 420
Outstanding, at the end 146,783   146,783  
Options Exercisable 28,356   28,356  
Weighted Average Exercise Price        
Outstanding, at the beginning     $ 40.76  
Issued     24.64  
Outstanding, at the end $ 33.51   33.51  
Exercisable $ 40.53   $ 40.53  
Aggregate Intrinsic Value        
Outstanding, Aggregate Intrinsic Value $ 28   $ 28  
Exercisable $ 14   $ 14