Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Goodwill (Details)

v3.8.0.1
Goodwill and Intangible Assets - Goodwill (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Goodwill [Roll Forward]    
Beginning Balance $ 57,976 $ 59,085
Sale of assets of a business (2,639)  
Currency effects 798 (1,109)
Ending Balance 56,135 57,976
Goodwill impairment (1,016) (1,016)
U.S. Regions    
Goodwill [Roll Forward]    
Beginning Balance 24,759 24,759
Sale of assets of a business 0  
Ending Balance 24,759 24,759
Goodwill impairment 0 0
U.S. Federal    
Goodwill [Roll Forward]    
Beginning Balance 3,375 3,375
Sale of assets of a business 0  
Ending Balance 3,375 3,375
Goodwill impairment 0 0
Canada    
Goodwill [Roll Forward]    
Beginning Balance 3,262 3,162
Sale of assets of a business 0  
Currency effects 232 100
Ending Balance 3,494 3,262
Goodwill impairment (1,016) (1,016)
Other    
Goodwill [Roll Forward]    
Beginning Balance 26,580 27,789
Sale of assets of a business (2,639)  
Currency effects 566 (1,209)
Ending Balance 24,507 26,580
Goodwill impairment $ 0 $ 0