STOCK-BASED COMPENSATION (Details 2) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 28, 2017	Oct. 29, 2016	Oct. 28, 2017	Oct. 29, 2016
Stock-based compensation
Allocated Share-based Compensation Expense	$ 8,081	$ 8,275	$ 22,561	$ 20,904
Vesting period (in years)			1 year	3 years
Cost of Sales [Member]
Stock-based compensation
Allocated Share-based Compensation Expense	1,100	1,100	$ 3,100	$ 2,600
Restricted Stock Units (RSUs) [Member]
Stock-based compensation
Allocated Share-based Compensation Expense	2,804	2,202	8,730	6,629
Performance Awards Member
Stock-based compensation
Allocated Share-based Compensation Expense	$ 5,277	$ 6,073	$ 13,831	$ 14,275
Percentage of Target Shares paid out if final operating income below threshold (as a percent)			100.00%
Unvested awards at the beginning of the period (in shares)			515
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			171
Vested (in shares)			(301)
Forfeited (in shares)			(36)
Unvested awards at the end of the period (in shares)	552		552
Weighted Average Grant Date Fair Value
Unvested awards at the beginning of the period (in dollars per share)			$ 68.11
Granted (in shares)			113.77
Vested (in dollars per share)			50.97
Forfeited (in dollars per share)			82.55
Unvested awards at the end of the period (in dollars per share)	$ 103.87		$ 103.87
Unrecognized costs and period of recognition
Unrecognized stock-based compensation expense (in dollars)	$ 33,700		$ 33,700
Weighted average period for recognition of unrecognized stock-based compensation expense (in years)			1 year 10 months 12 days