Annual report pursuant to Section 13 and 15(d)

Intangible Assets, Net and Goodwill (Narrative) (Details)

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Intangible Assets, Net and Goodwill (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]      
Amortization expense $ 3,000 $ 3,000 $ 3,900
Estimated amortization expense, 2018 2,537    
Estimated amortization expense, 2019 1,650    
Estimated amortization expense, 2020 1,650    
Estimated amortization expense, 2021 1,650    
Estimated amortization expense, 2022 $ 688    
Minimum      
Finite-Lived Intangible Assets [Line Items]      
Amortization period, in years 3 years    
Maximum      
Finite-Lived Intangible Assets [Line Items]      
Amortization period, in years 10 years