Document and Entity Information	3 Months Ended
	Mar. 31, 2012	May 08, 2012
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1
Trading Symbol	EPAM
Entity Registrant Name	EPAM SYSTEMS, INC.
Entity Central Index Key	0001352010
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		42,297,625