DEBT (Convertible Debt) (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended	12 Months Ended
	Aug. 20, 2014	May 31, 2013	Mar. 31, 2012	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010	Jun. 30, 2013	Mar. 31, 2010
Debt Instrument
Amortization of debt discount					$ 68,974	$ 66,687	$ 54,731
Gain (Loss) on Extinguishment of Debt					$ 0	$ (3)	(6,270)
0.9% Senior Convertible Notes Due September 2021
Debt Instrument
Debt Instrument, Face Amount	$ 1,000,000
Debt Instrument, Interest Rate, Stated Percentage	0.90%				0.90%	0.90%
Payments of Debt Issuance Costs							11,000
Debt Instrument, Convertible, Conversion Price	$ 2,055.50
Percentage On Conversion Price Of Closing Price Of Common Stock Traded For At Least 20 Trading Days Out Of 30 Consecutive Trading Days In The Period On Last Trading Day Of Previous Quarter	150.00%
Debt Instrument, Interest Rate, Effective Percentage	3.18%
Debt Instrument Convertible Carrying Amount Of The Equity Component Related To Debt Discount Net Of Tax							82,500
Debt Instrument, Convertible, Carrying Amount of Equity Component							142,900
Debt Instrument, Convertible Carrying Amount Of The Equity Component Related To Finance Costs Net Of Tax							1,600
0.9% Senior Convertible Notes Due September 2021 | Minimum
Debt Instrument
Debt Instrument, Convertible, Threshold Consecutive Trading Days	20 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares	$ 0
0.9% Senior Convertible Notes Due September 2021 | Maximum
Debt Instrument
Debt Instrument, Convertible, Threshold Consecutive Trading Days	30 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares	$ 375,000
0.35% Senior Convertible Notes Due June 2020
Debt Instrument
Debt Instrument, Face Amount		$ 1,000,000
Debt Instrument, Interest Rate, Stated Percentage		0.35%			0.35%	0.35%
Debt Instrument, Unamortized Discount		$ 20,000
Payments of Debt Issuance Costs								$ 1,000
Debt Instrument, Convertible, Conversion Price		$ 1,315.10
Percentage On Conversion Price Of Closing Price Of Common Stock Traded For At Least 20 Trading Days Out Of 30 Consecutive Trading Days In The Period On Last Trading Day Of Previous Quarter		150.00%
Debt Instrument, Interest Rate, Effective Percentage		3.13%
Debt Instrument Convertible Carrying Amount Of The Equity Component Related To Debt Discount Net Of Tax											$ 92,400
Debt Instrument, Convertible, Carrying Amount of Equity Component											154,300
Debt Instrument, Convertible Carrying Amount Of The Equity Component Related To Finance Costs Net Of Tax											$ 100
Amortization of debt discount					$ 2,800	$ 2,700	2,600
0.35% Senior Convertible Notes Due June 2020 | Minimum
Debt Instrument
Debt Instrument, Convertible, Threshold Consecutive Trading Days		20 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares		$ 0
0.35% Senior Convertible Notes Due June 2020 | Maximum
Debt Instrument
Debt Instrument, Convertible, Threshold Consecutive Trading Days		30 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares		$ 397,000
Convertible Debt 1.00 Percent Due March 2018
Debt Instrument
Debt Instrument, Face Amount			$ 1,000,000
Debt Instrument, Interest Rate, Stated Percentage			1.00%		1.00%	1.00%
Payments of Debt Issuance Costs									$ 20,900
Debt Instrument, Convertible, Conversion Price			$ 944.61
Percentage On Conversion Price Of Closing Price Of Common Stock Traded For At Least 20 Trading Days Out Of 30 Consecutive Trading Days In The Period On Last Trading Day Of Previous Quarter			150.00%
Debt Instrument, Interest Rate, Effective Percentage			3.50%
Debt Instrument Convertible Carrying Amount Of The Equity Component Related To Debt Discount Net Of Tax			$ 80,900
Debt Instrument, Convertible, Carrying Amount of Equity Component			135,200
Debt Instrument, Convertible Carrying Amount Of The Equity Component Related To Finance Costs Net Of Tax			$ 2,800
Convertible Debt 1.00 Percent Due March 2018 | Minimum
Debt Instrument
Debt Instrument, Convertible, Threshold Consecutive Trading Days			20 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares			$ 0
Convertible Debt 1.00 Percent Due March 2018 | Maximum
Debt Instrument
Debt Instrument, Convertible, Threshold Consecutive Trading Days			30 days
Additional Payment To Debt Holder Settled In Shares Aggregate Value Of Shares			$ 344,000
Convertible Debt 1.25 Percent Due March 2015
Debt Instrument
Debt Instrument, Face Amount												$ 575,000
Debt Instrument, Interest Rate, Stated Percentage												1.25%
Payments of Debt Issuance Costs										$ 13,300
Debt Instrument, Convertible, Conversion Price												$ 303.06
Debt Conversion Cash Delivered for Principal Due on Converted Debt				$ 37,500			$ 122,900
Debt Conversion, Converted Instrument, Shares Issued							300,256
Debt Conversion, Converted Instrument, Cash				$ 110,100			$ 2,200
Debt Instrument Convertible Carrying Amount Of The Equity Component Related To Debt Discount Net Of Tax												$ 69,100
Debt Instrument, Convertible, Carrying Amount of Equity Component												115,200
Debt Instrument, Convertible Carrying Amount Of The Equity Component Related To Finance Costs Net Of Tax												$ 1,600
Write off of Deferred Debt Issuance Cost							500
Gain (Loss) on Extinguishment of Debt							(6,300)
Extinguishment of Debt, Gain (Loss), Net of Tax							(3,800)
All Convertible Notes
Debt Instrument
Interest Expense, Debt					$ 94,500	$ 92,700	75,300
Debt Instrument, Coupon Interest Expense					22,500	22,600	17,100
Amortization of debt discount					67,500	65,600	54,400
Amortization of Debt Issuance Costs					$ 4,500	$ 4,500	$ 3,800
Debt Instrument, Interest Rate During Period					3.40%	3.40%	3.50%