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Merger and Acquisition Activities in Prior Years (Details Textual) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 15 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2010
Dec. 31, 2011
Sep. 30, 2011
Mar. 31, 2011
Dec. 31, 2011
Series Of Individually Immaterial Business Acquisitions [Member]
Dec. 31, 2010
Series Of Individually Immaterial Business Acquisitions [Member]
Jun. 30, 2010
Series Of Individually Immaterial Business Acquisitions [Member]
Dec. 31, 2010
Series Of Individually Immaterial Business Acquisitions [Member]
Bridge Loan [Member]
Business Acquisition [Line Items]                
Acquisition costs related to the merger of Enfora           $ 1.9    
Additional Cash consideration paid based on the operating results of Enfora         6.0      
Bridge loan amount in connection with the bid             30.0  
Debt issuance costs related to the bridge loan facility               3.1
Foreign currency gain, net of hedging transaction costs           1.7    
Legal, advisory and professional fees related to the acquisition bid           1.3    
Merger And Acquisition Activities In Prior Years (Textual) [Abstract]                
Cash consideration paid in exchange for an agreed upon amount of Enfora working capital 64.5              
Additional Cash consideration paid in exchange for an agreed upon amount of Enfora working capital 13.0              
Operating results contingent consideration   15 months            
Fair value of the contingent consideration 0.9              
Total Fair value of the contingent consideration 78.4              
Revision in the estimate of contingent consideration       0        
Adjustment to increase Enfora net deferred tax assets     $ 0.3