INCOME TAXES (Narrative) (Details) (USD $)

12 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Income Tax Holiday [Line Items]

Undistributed Earnings of Foreign Subsidiaries

$ 340,500,000

Aggregate dollar benefits from tax holidays

16,800,000

9,700,000

8,500,000

Income tax holiday benefit (in dollars per share)

$ 0.34

$ 0.20

$ 0.19

Unrecognized tax benefits

200,000

1,271,000

1,271,000

1,271,000

Penalties and interest

12,000

189,000

125,000

Unrecognized tax benefits with favorable impact

$ 212,000

$ 1,328,000

Belarus

Income Tax Holiday [Line Items]

Exemption (as a percent)

100.00%

Federal income tax rate (as a percent)

18.00%

Tax exemption period (in years)

15 years

Income tax holiday description

On September 22, 2005, the president of Belarus signed the decree “On the High-Technologies Park” (the “Decree”). The Decree is aimed at boosting the country’s high-technology sector. The Decree stipulates that member technology companies have a 100% exemption from Belarusian income tax of 18% effective July 1, 2006. The Decree is in effect for a period of 15 years from July 1, 2006.

Hungary

Income Tax Holiday [Line Items]

Tax exemption period (in years)

4 years

Income tax credit (as a percent)

70.00%

Income tax holiday description

The Company’s subsidiary in Hungary benefits from a tax credit of 10% of annual qualified salaries, taken over a 4-year period, for up to 70% of the total tax due for that period. The Company has been able to take the full 70% credit for 2008 - 2014. The Hungarian tax authorities repealed the tax credit beginning with 2012. However, credits earned in the years prior to 2012, will be allowed to be used through 2014. The Company has utilized the 70% limit through 2014.

Tax credit on annual qualified salaries (as a percent)

10.00%