Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Intangible Assets (Details)

v3.8.0.1
Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 25,998 $ 25,707
Accumulated Amortization 23,558 21,776
Intangible assets, net 2,440 3,931
Customer contracts    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 7,786 7,594
Accumulated Amortization 7,786 7,566
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 11,863 11,652
Accumulated Amortization 9,557 8,048
Non-compete agreements    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 3,052 3,203
Accumulated Amortization 3,048 3,158
Technology    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 2,751 2,716
Accumulated Amortization 2,642 2,485
Trade names    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 546 542
Accumulated Amortization $ 525 $ 519