STOCK PLANS AND SHARE-BASED COMPENSATION (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock-based compensation plans	2		2
Awards expiration period, maximum (in years)			10 years
Allocated stock-based compensation expense	$ 4,175,000	$ 4,328,000	$ 8,090,000	$ 7,964,000
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of employee's compensation eligible for payroll deductions	15.00%		15.00%
Purchase price of the purchase plan as percentage of the lower of the fair market value on the first day of each offering period or on the purchase date			85.00%
Number of purchase period in each offering period			1
Duration of each purchase period in each offering period			6 months
Shares reserved for issuance	3,000,000		3,000,000
Employee shares purchased for award	2,646,861		2,646,861
Shares available for grant	353,139		353,139
Allocated stock-based compensation expense	300,000	300,000	600,000	600,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Allocated stock-based compensation expense	2,700,000	2,400,000	5,200,000	4,400,000
Reduction in number of shares available for issuance under the 2007 Plan per award granted			2.0
Granted shares			250,000
Vested shares			246,000
Outstanding shares	706,000		706,000		714,000
Weighted-average grant date fair value per granted share	$ 47.81	$ 40.80	$ 50.97	$ 38.28
Grant date fair value of awards released	7,800,000	6,500,000	9,500,000	6,800,000
Performance Based Awards (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated stock-based compensation expense	700,000	900,000	1,300,000	1,300,000
Reduction in number of shares available for issuance under the 2007 Plan per award granted			2.0
Granted shares			83,000
Vested shares			83,000
Outstanding shares	83,000		83,000		100,000
Weighted-average grant date fair value per granted share	$ 48.89	$ 41.78	$ 53.93	$ 38.62
Grant date fair value of awards released			3,200,000	2,000,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Allocated stock-based compensation expense	500,000	700,000	1,000,000	1,700,000
2007 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			48 months
2007 Equity Incentive Plan [Member] | Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price of stock options as percentage of fair market value on date of grant, minimum			100.00%
2007 Equity Incentive Plan [Member] | Nonstatutory Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price of stock options as percentage of fair market value on date of grant, minimum			100.00%
Directors Equity Compensation Program [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Factor used to determine the number of options/units to be granted			100,000
Directors Equity Compensation Program [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Factor used to determine the number of options/units to be granted			100,000
Directors Equity Compensation Program [Member] | Stock Options and Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Factor used to determine the number of options/units to be granted			$ 100,000
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future issuance	6,619,099		6,619,099