v3.19.2
Document And Entity Information - shares
6 Months Ended
Jun. 30, 2019
Aug. 08, 2019
Document And Entity Information [Abstract]    
Entity Registrant Name INNERWORKINGS INC  
Entity Central Index Key 0001350381  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding (in shares)   51,941,478
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2019  
Entity Current Reporting Status Yes  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false