ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustments, net of tax	[1]	$ (217,263)	$ (102,758)
Net unrealized gain (loss) on marketable securities, net of tax	[2]	462,115	(157,144)
Accumulated other comprehensive income (loss)		244,852	(259,902)
Net unrealized gain (loss) on investment securities, before tax		456,100	(164,700)
Unrealized Gain/(Loss) on Investments, nontaxable in the Netherlands		(481,300)	134,600
Unrealized Gain/(Loss) on Investments, taxable		25,200	30,100
Euro Senior Notes [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net gain (loss) from fair value adjustments associated with net investment hedges, before tax		220,500	83,800
Non-Derivative used in Net Investment Hedge, Net of Tax		126,800	48,300
Foreign Exchange Forward
Accumulated Other Comprehensive Income (Loss) [Line Items]
Derivatives used in Net Investment Hedge, Net of Tax		(34,800)	(37,800)
Net gain (loss) from fair value adjustments associated with net investment hedges, before tax		$ (52,600)	$ (57,800)

[1] Foreign currency translation adjustments, net of tax, includes net losses from fair value adjustments of $34.8 million after tax ($52.6 million before tax) and $37.8 million after tax ($57.8 million before tax) associated with derivatives designated as net investment hedges at December 31, 2015 and 2014, respectively (see Note 5).Foreign currency translation adjustments, net of tax, includes foreign currency transaction gains at December 31, 2015 of $126.8 million after tax ($220.5 million before tax) associated with the Company's 2022 Notes, 2024 Notes and 2027 Notes and foreign currency transaction gains at December 31, 2014 of $48.3 million after tax ($83.8 million before tax) associated with the Company's 2024 Notes. The 2022 Notes, 2024 Notes and 2027 Notes are Euro-denominated debt and are designated as hedges of certain of the Company's Euro-denominated net assets (see Note 10). The remaining balance in foreign currency translation adjustments excludes income taxes as a result of the Company's intention to indefinitely reinvest the earnings of its international subsidiaries outside of the United States.

[2] The unrealized gains before tax at December 31, 2015 were $456.1 million, of which unrealized gains of $481.3 million were exempt from tax in the Netherlands and unrealized losses of $25.2 million were taxable. The unrealized losses before tax at December 31, 2014 were $164.7 million, of which unrealized losses of $134.6 million were exempt from tax in the Netherlands and unrealized losses of $30.1 million were taxable.