Goodwill and Intangible Assets Schedule of Goodwill (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Goodwill [Line Items]      
Goodwill $ 296,630 $ 283,585 $ 284,466
Accumulated Impairment Losses (201,014) (151,700) (151,689)
Net Goodwill 95,616 131,885 132,777
Goodwill of acquired businesses 19,046 1,542  
Impairment of goodwill of business held for sale   (11)  
Other activity (1) 668 1,149 [1]  
Foreign currency effects (6,669) (3,572)  
Impairment of goodwill (49,314) 0 0
U.S. Services      
Goodwill [Line Items]      
Goodwill 31,829 31,829 31,829
Accumulated Impairment Losses (5,465) 0 0
Net Goodwill 26,364 $ 31,829 31,829
Foreign currency effects 0  
Impairment of goodwill (5,465)    
International      
Goodwill [Line Items]      
Goodwill 94,069 $ 81,024 81,905
Accumulated Impairment Losses (44,416) (567) (556)
Net Goodwill 49,653 80,457 81,349
Goodwill of acquired businesses 19,046 1,542  
Impairment of goodwill of business held for sale   (11)  
Other activity (1) 668 1,149 [1]  
Foreign currency effects (6,669) (3,572)  
Impairment of goodwill (43,849)    
Broadspire      
Goodwill [Line Items]      
Goodwill 151,133 151,133 151,133
Accumulated Impairment Losses (151,133) (151,133) (151,133)
Net Goodwill 0 0 0
Garden City Group      
Goodwill [Line Items]      
Goodwill 19,599 19,599 19,599
Accumulated Impairment Losses 0 0 0
Net Goodwill 19,599 $ 19,599 $ 19,599
Former EMEA/AP segment      
Goodwill [Line Items]      
Impairment of goodwill (38,138)    
Americas excluding U.S. Contractor Connection reporting unit      
Goodwill [Line Items]      
Impairment of goodwill (11,176)    
Canada and Latin America      
Goodwill [Line Items]      
Accumulated impairment loss reclassification $ 5,711    
[1] (1) "Other activity" relates to adjustments for deferred taxes acquired in connection with prior period business combinations.