v2.4.0.8
DOCUMENT AND ENTITY INFORMATION DOCUMENT AND ENTITY INFORMATION
3 Months Ended
Mar. 31, 2014
May 13, 2014
Entity [Abstract]    
Entity Registrant Name K2M Group Holdings, Inc.  
Entity Central Index Key 0001499807  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Document Type 10-Q  
Document Period End Date Mar. 31, 2014  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   37,085,906