Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Amortization (Details)

v3.8.0.1
Goodwill and Intangible Assets - Amortization (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets $ 1,451 $ 2,358 $ 4,150
Customer contracts      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets 31 184 932
Customer relationships      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets 1,244 1,809 2,139
Non-compete agreements      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets 42 116 494
Technology      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets 128 238 528
Trade names      
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets $ 6 $ 11 $ 57