Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Aug. 01, 2019
Document And Entity Information [Abstract]    
Entity Registrant Name VERRA MOBILITY CORP  
Entity Central Index Key 0001682745  
Document Type 10-Q  
Document Period End Date Jun. 30, 2019  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Current Reporting Status Yes  
Entity File Number 001-37979  
Entity Tax Identification Number 813563824  
Entity Address, Address Line One 1150 North Alma School Road  
Entity Address, City or Town Mesa  
Entity Address, State or Province Arizona  
Entity Address, Postal Zip Code 85201  
City Area Code (480)  
Local Phone Number 443-7000  
Entity Shell Company false  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Trading Symbol VRRM  
Entity Common Stock, Shares Outstanding   158,609,946