Document and Entity Information
9 Months Ended
Sep. 30, 2013
Nov. 01, 2013
Document Information [Line Items]    
Document Type 10-Q/A  
Amendment Flag true  
Amendment Description Benefitfocus, Inc. is filing this Amendment No. 1 to Quarterly Report on Form 10-Q/A for the three months ended September 30, 2013 (“Amendment No. 1”), originally filed with the Securities and Exchange Commission (“SEC”) on November 12, 2013 (the “Original Filing”), to restate its unaudited consolidated financial statements included in the Original Filing (the “Restatement”) and to reflect related matters involving the Company’s disclosure controls and procedures and internal control over financial reporting. In connection with the Company’s year-end accounting review and preparation of its year-end financial statements, the Company discovered in the first quarter of 2014 an error in its accounting for a leased asset as more fully described in Notes 3 and 12 to the Unaudited Consolidated Financial Statements included in this Amendment No. 1. The Restatement in this Amendment No. 1 is solely related to the error in accounting for the leased asset. For the convenience of the reader, this Amendment No. 1 sets forth the Original Filing in its entirety, as modified and superseded where necessary to reflect the Restatement. The following items have been amended as a result of, and only to reflect, the Restatement: Part I – Item 1. Financial Statements Part I – Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations Part I – Item 4. Controls and Procedures Part II – Item 1A. Risk Factors and Part II – Item 6. Exhibits. In accordance with applicable SEC rules, this Amendment No. 1 includes certifications from the Company’s President and Chief Executive Officer, and its Chief Financial Officer dated as of the date of this filing. Except as set forth above, the Original Filing has not been amended, updated or otherwise modified, and does not reflect events occurring after November 12, 2013, the date of the Original Filing, or modify or update those disclosures that may have been affected by subsequent events.  
Document Period End Date Sep. 30, 2013  
Document Fiscal Year Focus 2013  
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 Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   24,463,854