Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
Intangible Assets, Net and Goodwill (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]      
Amortization expense $ 2,980,000 $ 3,883,000 $ 5,146,000
Estimated amortization expense, 2018 2,980,000    
Estimated amortization expense, 2019 2,537,000    
Estimated amortization expense, 2020 1,650,000    
Estimated amortization expense, 2021 1,650,000    
Estimated amortization expense, 2022 $ 1,650,000    
Minimum [Member]      
Finite-Lived Intangible Assets [Line Items]      
Amortization period, in years 3 years    
Maximum [Member]      
Finite-Lived Intangible Assets [Line Items]      
Amortization period, in years 10 years