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Goodwill and Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 1 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2011
Customer Lists and Service Contracts [Member]
Dec. 31, 2010
Customer Lists and Service Contracts [Member]
Dec. 31, 2011
Trade Name [Member]
Dec. 31, 2010
Trade Name [Member]
Dec. 31, 2011
Technology [Member]
Dec. 31, 2010
Technology [Member]
Dec. 31, 2010
Customer Lists [Member]
Applied Cleansing [Member]
Mar. 31, 2009
EMEA [Member]
Goodwill [Line Items]                      
Impairment loss $ 0 $ 0 $ 43,363               $ 43,363
Percentage of goodwill for the reporting unit impaired (in hundredths)                     100.00%
Income tax benefit relating to goodwill impairment                     1,074
Goodwill Gross [Roll Forward]                      
Balance, beginning of period 67,008 68,706                  
Additions 688                    
Adjustments   (117)                  
Foreign currency fluctuations (1,173) (1,581)                  
Balance, end of period 66,523 67,008 68,706                
Goodwill Accumulated Impairment Losses [Roll Forward]                      
Balance, beginning of period (46,585) (48,525)                  
Adjustments   0                  
Additions 0                    
Impairment losses 0 0 (43,363)               (43,363)
Foreign currency fluctuations 365 1,940                  
Balance, end of period (46,220) (46,585) (48,525)                
Goodwill Net [Roll Forward]                      
Balance, beginning of period 20,423 20,181                  
Additions 688                    
Adjustments   (117)                  
Impairment losses 0 0 (43,363)               (43,363)
Foreign currency fluctuations (808) 359                  
Balance, end of period 20,303 20,423 20,181                
Acquired Finite-Lived Intangible Assets [Line Items]                      
Original cost 37,706 34,812   25,987 26,662 4,583 4,709 7,136 3,441    
Accumulated amortization (13,948) (9,473)   (10,387) (7,344) (1,209) (901) (2,352) (1,228)    
Carrying amount 23,758 25,339   15,600 19,318 3,374 3,808 4,784 2,213    
Weighted-average original life (in years)       14 14 14 14 13 11 8  
Impairment charge for customer lists and technology intangible assets 1,805                    
Amortization expense on Intangible Assets 3,330 3,166 3,120                
Estimated aggregate amortization expense of Intangible Assets [Abstract]                      
2012 2,459                    
2013 2,343                    
2014 2,281                    
2015 2,269                    
2016 2,229                    
Thereafter 12,177                    
Total $ 23,758