Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets - Schedule of future amortization expense related to finite-lived intangible assets (Details)

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Goodwill and Other Intangible Assets - Schedule of future amortization expense related to finite-lived intangible assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]    
2018 $ 6,067  
2019 5,546  
2020 5,251  
2021 727  
2022 727  
Thereafter 1,091  
Net Carrying Value $ 19,409 $ 90,232