Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets and Goodwill - Definite Lived Intangible Assets (Details)

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Intangible Assets and Goodwill - Definite Lived Intangible Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, net $ 12,930 $ 16,139
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross 36,725 35,795
Less: accumulated amortization (30,521) (26,172)
Intangible assets, net 6,204 9,623
Trade names    
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross 9,443 8,793
Less: accumulated amortization $ (2,717) $ (2,277)