Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill by Reportable Segment (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Goodwill [Line Items]
Balance	$ 838,867
Foreign currency translation adjustment	(6,056)
Balance	832,811
Commercial Services
Goodwill [Line Items]
Balance	425,081
Foreign currency translation adjustment	(5,456)
Balance	419,625
Government Solutions
Goodwill [Line Items]
Balance	215,400
Foreign currency translation adjustment	(600)
Balance	214,800
Parking Solutions [Member]
Goodwill [Line Items]
Balance	198,386
Foreign currency translation adjustment	0
Balance	$ 198,386