INCOME TAXES (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Loss Carryforwards [Line Items]
Unrecognized tax benefits that, if recognized, would affect the effective tax rate	$ 88,100,000	$ 87,500,000	$ 72,700,000
Tax benefit realized from stock options exercised	1,601,000	2,260,000	1,264,000
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	246,000,000
Income Tax Examination, Penalties and Interest Expense	1,200,000	2,800,000	400,000
Income Tax Examination, Penalties and Interest Accrued	5,200,000	3,800,000
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Tax credits carry forwards	69,200,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Tax credits carry forwards	23,600,000
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards	137,000,000
Tax credits carry forwards	39,000,000
Beginning 2031 [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards	17,600,000
Beginning 2015 [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards	501,000,000
Beginning 2016 [Member] | Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards	$ 151,000,000