Quarterly report pursuant to Section 13 or 15(d)

Acquisitions (Details)

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Acquisitions (Details)
$ in Thousands, $ in Millions
Aug. 16, 2019
USD ($)
Aug. 16, 2019
CAD ($)
Nov. 16, 2018
USD ($)
Dec. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Business Acquisition [Line Items]          
Goodwill       $ 586,659 $ 584,469
GT Hiring Solutions Inc          
Business Acquisition [Line Items]          
Cash payment to acquire business $ 6,100 $ 8.1      
Goodwill 1,700        
Intaigible assets acquired $ 2,700        
Percentage of voting equity interests acquired at the acquisition date in the business combination 100.00%        
Useful life 7 years 7 years      
General Dynamics Information Technology's Citizen Engagement Centers          
Business Acquisition [Line Items]          
Cash payment to acquire business     $ 430,700    
Goodwill     184,600    
Intaigible assets acquired     $ 122,300