Document and Entity Information
3 Months Ended
Mar. 31, 2012
Apr. 25, 2012
Document and Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2012  
Entity Registrant Name NAVIGANT CONSULTING INC  
Entity Central Index Key 0001019737  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   51,844,583
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2012  
Trading Symbol nci