STOCK PLANS AND SHARE BASED COMPENSATION (Performance-based Awards and Restricted Stock Units) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Performance Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of performance-based awards shares released as a percentage of target number, maximum	0.00%
Number of performance-based awards shares released as a percentage of target number, minimum	200.00%
Reduction in number of shares available for issuance under the 2007 Plan per award granted	2.0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments [Roll Forward]
Outstanding, shares, beginning of period	100,000	102,000	0
Granted, shares	83,000	102,000	102,000
Vested, shares	(83,000)	(54,000)	0
Change in units due to performance achievement for PSUs not earned, shares	(17,000)	(48,000)
Forfeited or expired, shares	(83,000)	(2,000)	0
Outstanding, shares, end of period	0	100,000	102,000
Outstanding, weighted-average grant date fair value per share, beginning of period	$ 38.48	$ 37.60	$ 0.00
Granted, weighted-average grant date fair value per share	$ 53.93	$ 38.68	$ 37.60
Vested, weighted-average grant date fair value per share	$ 38.48	$ 37.60	$ 0.00
Change in units due to performance achievement for PSUs not earned, weighted- average grant date fair value per share	$ 38.48	$ 37.60
Forfeited or expired, weighted-average grant date fair value per share	$ 53.93	$ 41.79	$ 0.00
Outstanding, weighted-average grant date fair value per share, end of period	$ 0.00	$ 38.48	$ 37.60
Outstanding, weighted-average remaining contractual term (in years)	0 years
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Outstanding, Aggregate Intrinsic Value	$ 0
Outstanding and expected to vest, shares	0
Outstanding and expected to vest, weighted-average remaining contractual term (in years)	0 years
Outstanding and expected to vest, aggregate intrinsic value	0
Grant date fair value of awards released	3,200,000	2,000,000
Long-Term Performance-based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduction in number of shares available for issuance under the 2007 Plan per award granted	2.0
Performance based period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments [Roll Forward]
Outstanding, shares, beginning of period	0
Granted, shares	61,000
Vested, shares	0
Forfeited or expired, shares	0
Outstanding, shares, end of period	61,000
Outstanding, weighted-average grant date fair value per share, beginning of period	$ 0.00
Granted, weighted-average grant date fair value per share	$ 55.51
Vested, weighted-average grant date fair value per share	$ 0.00
Forfeited or expired, weighted-average grant date fair value per share	$ 0.00
Outstanding, weighted-average grant date fair value per share, end of period	$ 55.51
Outstanding, weighted-average remaining contractual term (in years)	2 years
Outstanding, aggregate intrinsic value	3,161,000
Outstanding and expected to vest, shares	37,000
Outstanding and expected to vest, weighted-average remaining contractual term (in years)	2 years
Outstanding and expected to vest, aggregate intrinsic value	1,928,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduction in number of shares available for issuance under the 2007 Plan per award granted	2.0
Awards vesting period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments [Roll Forward]
Outstanding, shares, beginning of period	714,000	573,000	458,000
Granted, shares	281,000	386,000	293,000
Vested, shares	(267,000)	(195,000)	(152,000)
Forfeited or expired, shares	(36,000)	(50,000)	(26,000)
Outstanding, shares, end of period	692,000	714,000	573,000
Outstanding, weighted-average grant date fair value per share, beginning of period	$ 38.97	$ 38.21	$ 36.08
Granted, weighted-average grant date fair value per share	$ 51.12	$ 39.09	$ 41.06
Vested, weighted-average grant date fair value per share	$ 38.57	$ 37.92	$ 36.48
Forfeited or expired, weighted-average grant date fair value per share	$ 42.74	$ 39.50	$ 36.92
Outstanding, weighted-average grant date fair value per share, end of period	$ 43.86	$ 38.97	$ 38.21
Outstanding, weighted-average remaining contractual term (in years)	1 year 3 months 10 days
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Outstanding, Aggregate Intrinsic Value	35,821,000
Outstanding and expected to vest, shares	645,000
Outstanding and expected to vest, weighted-average remaining contractual term (in years)	1 year 2 months 19 days
Outstanding and expected to vest, aggregate intrinsic value	33,364,000
Grant date fair value of awards released	$ 10,300,000	$ 7,400,000	$ 5,500,000
Minimum [Member] | Long-Term Performance-based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of performance-based awards shares released as percentage of target number, minimum	0.00%
Maximum [Member] | Long-Term Performance-based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of performance-based awards shares released as percentage of target number, minimum	200.00%