XML 78 R1.htm IDEA: XBRL DOCUMENT v3.19.3
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2019
Nov. 01, 2019
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Trading Symbol NSIT  
Entity Registrant Name INSIGHT ENTERPRISES INC  
Entity Central Index Key 0000932696  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Shell Company false  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   35,256,041
Entity File Number 0-25092  
Entity Tax Identification Number 86-0766246  
Entity Address, Address Line One 6820 South Harl Avenue  
Entity Address, City or Town Tempe  
Entity Address, State or Province AZ  
Entity Address, Postal Zip Code 85283  
City Area Code 480  
Local Phone Number 333-3000  
Entity Incorporation, State or Country Code DE  
Title of 12(b) Security Common stock, par value $0.01  
Security Exchange Name NASDAQ  
Document Quarterly Report true  
Document Transition Report false