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Acquisitions (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2021
Mar. 31, 2020
Business Acquisition      
Payments to acquire businesses, net of cash   $ 12,049 $ 261
Readysub      
Business Acquisition      
Payments to acquire business $ 6,300    
Payments to acquire businesses, net of cash 6,200    
Accrued for working capital 98 98  
DataSpec      
Business Acquisition      
Payments to acquire business 5,900    
Payments to acquire businesses, net of cash 5,800    
Accrued for working capital $ 63 $ 63