STOCK PLANS AND SHARE-BASED COMPENSATION (Performance-based Awards and Restricted Stock Units) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Performance Based Awards (PSUs) [Member]
Shares
Outstanding at beginning of period (in shares)			0
Granted shares (in shares)			88,000
Vested (in shares)			0
Change in units due to performance achievement for PSUs vested in the year (in shares)			0
Forfeited or expired (in shares)			(1,000)
Outstanding at period end (in shares)	87,000		87,000
Outstanding and expected to vest at period end (in shares)	12,000		12,000
Weighted- Average Grant Date Fair Value Per Share
Outstanding at beginning of period (in dollars per share)			$ 0.00
Granted (in dollars per share)	$ 37.81	$ 0	52.39	$ 53.93
Vested (in dollars per share)			0.00
Change in units due to performance achievement for PSUs vested in the year (in dollars per share)			0.00
Forfeited or expired (in dollars per share)			50.79
Outstanding at period end (in dollars per share)	$ 52.41		$ 52.41
Weighted-Average Remaining Contractual Term (in years)
Outstanding and expected to vest, weighted-average remaining contractual term, at period end			3 months
Outstanding and expected to vest, weighted-average remaining contractual term, at period end			3 months
Aggregate Intrinsic Value (in thousands)
Outstanding, aggregate intrinsic value, at period end	$ 3,684		$ 3,684
Outstanding and expected to vest, aggregate intrinsic value, at period end	$ 516		$ 516
Long-Term Performance-based Awards (PRSUs) [Member]
Shares
Outstanding at beginning of period (in shares)			61,000
Granted shares (in shares)	0	0	72,000
Vested (in shares)			0
Forfeited or expired (in shares)			(4,000)
Outstanding at period end (in shares)	129,000		129,000
Outstanding and expected to vest at period end (in shares)	17,000		17,000
Weighted- Average Grant Date Fair Value Per Share
Outstanding at beginning of period (in dollars per share)			$ 55.51
Granted (in dollars per share)			52.47	56.15
Vested (in dollars per share)			0.00
Forfeited or expired (in dollars per share)			57.76
Outstanding at period end (in dollars per share)	$ 53.75		$ 53.75
Weighted-Average Remaining Contractual Term (in years)
Outstanding and expected to vest, weighted-average remaining contractual term, at period end			1 year 9 months 22 days
Outstanding and expected to vest, weighted-average remaining contractual term, at period end			1 year 9 months 15 days
Aggregate Intrinsic Value (in thousands)
Outstanding, aggregate intrinsic value, at period end	$ 5,427		$ 5,427
Outstanding and expected to vest, aggregate intrinsic value, at period end	$ 724		$ 724
Restricted Stock Units (RSUs) [Member]
Shares
Outstanding at beginning of period (in shares)			692,000
Granted shares (in shares)			302,000
Vested (in shares)			(257,000)
Forfeited or expired (in shares)			(48,000)
Outstanding at period end (in shares)	689,000		689,000
Outstanding and expected to vest at period end (in shares)	636,000		636,000
Weighted- Average Grant Date Fair Value Per Share
Outstanding at beginning of period (in dollars per share)			$ 43.86
Granted (in dollars per share)	$ 42.65	$ 58.03	49.90	$ 51.30
Vested (in dollars per share)			42.49
Forfeited or expired (in dollars per share)			45.55
Outstanding at period end (in dollars per share)	$ 46.90		$ 46.90
Weighted-Average Remaining Contractual Term (in years)
Outstanding and expected to vest, weighted-average remaining contractual term, at period end			1 year 5 months 15 days
Outstanding and expected to vest, weighted-average remaining contractual term, at period end			1 year 4 months 25 days
Aggregate Intrinsic Value (in thousands)
Outstanding, aggregate intrinsic value, at period end	$ 29,073		$ 29,073
Outstanding and expected to vest, aggregate intrinsic value, at period end	$ 26,804		$ 26,804