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Revenue Recognition (Narrative) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
segment
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
Revenue from Contract with Customer [Abstract]      
Number of reportable segments | segment 1    
Capitalized contract costs $ 691   $ 799
Amortization of contract costs $ 300 $ 600