STOCK PLANS AND SHARE-BASED COMPENSATION (Performance-based Awards and Restricted Stock Units) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Aggregate Intrinsic Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period			3 years
Performance Based Awards (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value of awards released				$ 3,200
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
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Outstanding, shares, at beginning of period			0
Granted, shares			88,000
Vested, shares			0
Change in units due to performance achievement for PSUs vested in the year, shares			0
Forfeited or expired, shares			0
Outstanding, shares, at period end	88,000		88,000
Outstanding and expected to vest at period end	14,000		14,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, weighted-average grant date fair value per share, at beginning of period			$ 0.00
Granted, weighted-average grant date fair value per share	$ 50.75	$ 48.89	52.45	$ 53.93
Vested, weighted-average grant date fair value per share			0.00
Change in units due to performance achievement for PSUs vested in the year 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, at period end	$ 52.45		$ 52.45
Weighted Average Remaining Contractual Term [Abstract]
Outstanding and expected to vest, weighted-average remaining contractual term, at period end (in years)			6 months
Outstanding and expected to vest, weighted-average remaining contractual term, at period end (in years)			6 months
Aggregate Intrinsic Value [Abstract]
Outstanding, aggregate intrinsic value, at period end	$ 3,980		$ 3,980
Outstanding and expected to vest, aggregate intrinsic value, at period end	$ 637		$ 637
Number of performance-based awards shares released as percentage of target number, minimum			0.00%
Long-Term Performance-based Awards (PRSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Outstanding, shares, at beginning of period			61,000
Granted, shares			72,000
Vested, shares			0
Forfeited or expired, shares			0
Outstanding, shares, at period end	133,000		133,000
Outstanding and expected to vest at period end	76,000		76,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, weighted-average grant date fair value per share, at beginning of period			$ 55.51
Granted, weighted-average grant date fair value per share	$ 49.40	$ 47.95	52.47	$ 56.15
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, at period end	$ 53.87		$ 53.87
Weighted Average Remaining Contractual Term [Abstract]
Outstanding and expected to vest, weighted-average remaining contractual term, at period end (in years)			2 years 13 days
Outstanding and expected to vest, weighted-average remaining contractual term, at period end (in years)			2 years 10 days
Aggregate Intrinsic Value [Abstract]
Outstanding, aggregate intrinsic value, at period end	$ 5,995		$ 5,995
Outstanding and expected to vest, aggregate intrinsic value, at period end	3,440		$ 3,440
Number of performance-based awards shares released as percentage of target number, minimum			0.00%
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	$ 7,800	$ 7,800	$ 10,600	$ 9,500
Reduction in number of shares available for issuance under the 2007 Plan per award granted			2
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Outstanding, shares, at beginning of period			692,000
Granted, shares			282,000
Vested, shares			(248,000)
Forfeited or expired, shares			(19,000)
Outstanding, shares, at period end	707,000		707,000
Outstanding and expected to vest at period end	649,000		649,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, weighted-average grant date fair value per share, at beginning of period			$ 43.86
Granted, weighted-average grant date fair value per share	$ 49.37	$ 47.81	50.43	$ 50.97
Vested, weighted-average grant date fair value per share			42.53
Forfeited or expired, weighted-average grant date fair value per share			44.33
Outstanding, weighted-average grant date fair value per share, at period end	$ 46.93		$ 46.93
Weighted Average Remaining Contractual Term [Abstract]
Outstanding and expected to vest, weighted-average remaining contractual term, at period end (in years)			1 year 8 months 9 days
Outstanding and expected to vest, weighted-average remaining contractual term, at period end (in years)			1 year 7 months 18 days
Aggregate Intrinsic Value [Abstract]
Outstanding, aggregate intrinsic value, at period end	$ 31,938		$ 31,938
Outstanding and expected to vest, aggregate intrinsic value, at period end	$ 29,317		$ 29,317