v2.4.0.8
Document and Entity Information
9 Months Ended
Sep. 30, 2015
Oct. 30, 2015
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2015  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q3  
Trading Symbol BNFT  
Entity Registrant Name Benefitfocus,Inc.  
Entity Central Index Key 0001576169  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   29,139,773