INCOME TAXES (Income Tax Holiday) (Details) - Foreign - Belarus - USD ($)
$ / shares in Units, $ in Millions

12 Months Ended

Dec. 31, 2017

Dec. 31, 2016

Dec. 31, 2015

Income Tax Holiday [Line Items]

Income tax holiday description

In Belarus, member technology companies of High-Technologies Park have a full exemption from Belarus income tax. This tax holiday was recently extended through January 2049. The aggregate dollar benefits derived from this tax holiday approximated $15.5 million, $13.6 million and $20.8 million for the years ended December 31, 2017, 2016 and 2015, respectively. The benefit the tax holiday had on diluted net income per share approximated $0.28, $0.26 and $0.40 for the years ended December 31, 2017, 2016 and 2015, respectively.

Income tax holiday termination date

1/1/2049

Aggregate dollar benefits from tax holiday

$ 15.5

$ 13.6

$ 20.8

Tax holiday benefit on diluted net income per share

$ 0.28

$ 0.26

$ 0.40