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SUBSEQUENT EVENTS (Notes)	9 Months Ended
SUBSEQUENT EVENTS (Notes)	Sep. 30, 2018
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS On November 1, 2018, the Company acquired 100% of the equity interests of Think Limited, a digital transformation agency headquartered in London, UK. This acquisition is intended to strengthen EPAM’s digital and organizational consulting capabilities in the UK and Western European markets and enhance the Company’s global product and design offerings. The aggregate purchase price included approximately $27,000 cash and up to approximately $8,200 of contingent consideration subject to attainment of specified performance targets in the 12 months after the acquisition.