Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets and Goodwill (Narrative) (Details)

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Intangible Assets and Goodwill (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
Amortization expense $ 5,200 $ 723