v3.19.1
Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2018
Mar. 13, 2019
Jun. 30, 2018
Document And Entity Information [Abstract]      
Entity Registrant Name VERRA MOBILITY CORP    
Entity Central Index Key 0001682745    
Document Type 10-K    
Document Period End Date Dec. 31, 2018    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
Entity Shell Company false    
Entity Public Float     $ 357,382,596
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Trading Symbol VRRM    
Entity Common Stock, Shares Outstanding   156,056,642