INCOME TAXES (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Unrecognized tax benefits that, if recognized, would affect the effective tax rate	$ 87,000	$ 88,100	$ 87,500
Tax benefit realized from stock options exercised	$ 1,575	$ 1,601	$ 2,260
U.S. Federal statutory income tax rate	35.00%	35.00%	35.00%
Amount of indefinite re-investment with respect to the earnings and profits of its other foreign subsidiaries	$ 269,000
Income Tax Examination, Penalties and Interest Expense	2,200	$ 1,200	$ 2,800
Income Tax Examination, Penalties and Interest Accrued	6,900	$ 5,200
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Tax credits carry forwards	76,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Tax credits carry forwards	25,300
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards	122,400
Tax credits carry forwards	44,600
Beginning 2031 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards	17,500
Beginning 2015 [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards	482,600
Beginning 2016 [Member] | Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards	$ 134,900