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Acquisition - Summary of Pro Forma Financial Information (Details) - Redflex and T2 Systems Acquisitions - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Business Acquisition Pro Forma Information [Line Items]    
Revenue $ 650,567 $ 530,807
Net income (loss) $ 30,099 $ (58,695)