STOCK PLANS AND SHARE-BASED COMPENSATION (Performance-based Awards and Restricted Stock Units) (Details) (USD $)	3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended
	Mar. 31, 2013 Performance Based Awards [Member]	Sep. 30, 2013 Performance Based Awards [Member]	Sep. 30, 2012 Performance Based Awards [Member]	Sep. 30, 2013 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2012 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2013 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2012 Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period						4 years
Grant date fair value of awards released		$ 2,000,000		$ 300,000	$ 300,000	$ 7,100,000	$ 4,100,000
Number of performance-based awards shares released as percentage of target number, minimum		0.00%
Number of performance-based awards shares released as percentage of target number, maximum		200.00%
Reduction in number of shares available for issuance under the 2007 Plan per award granted		2.0				2.0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Outstanding, shares, at January 1, 2013	102,000	102,000				573,000
Outstanding, weighted-average grant date fair value per share, at January 1, 2013	$ 37.60	$ 37.60				$ 38.21
Granted, shares		101,000				371,000
Granted, weighted-average grant date fair value per share		$ 38.62	$ 37.60	$ 43.18	$ 37.05	$ 38.52	$ 41.54
Vested, shares	(54,000)					(185,000)
Vested, weighted-average grant date fair value per share		$ 37.60				$ 38.10
Change in units due to performance achievement for PSUs vested in the year, shares		(48,000)
Change in units due to performance achievement for PSUs vested in the year per share		$ 37.60
Forfeited or expired, shares		(2,000)				(43,000)
Forfeited or expired, weighted-average grant date fair value per share		$ 41.79				$ 39.35
Outstanding, shares, at September 30, 2013		99,000		716,000		716,000
Outstanding, weighted-average grant date fair value per share, at September 30, 2013		$ 38.50		$ 38.63		$ 38.63
Outstanding and expected to vest, weighted-average remaining contractual term, at September 30, 2013 (in years)		3 months				1 year 6 months 29 days
Outstanding, aggregate intrinsic value, at September 30, 2013		5,373,000		38,780,000		38,780,000
Outstanding and expected to vest at September 30, 2013		80,000		664,000		664,000
Outstanding and expected to vest, weighted-average remaining contractual term, at September 30, 2013 (in years)		3 months				1 year 6 months 26 days
Outstanding and expected to vest, aggregate intrinsic value, at September 30, 2013		$ 4,335,000		$ 35,968,000		$ 35,968,000