STOCK-BASED COMPENSATION (Stock Option Activity) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 30, 2017 USD ($) $ / shares shares
Stock Options (Number of shares)
Outstanding, beginning balance (in shares) | shares	1,441,210
Granted (in shares) | shares	338,356
Exercised (in shares) | shares	(240,850)
Forfeited (in shares) | shares	(40,828)
Expired (in shares) | shares	(3,665)
Outstanding, ending balance (in shares) | shares	1,494,223
Vested and expected to vest (in shares) | shares	1,422,339
Exercisable (in shares) | shares	907,065
Stock Options (Weighted-average exercise price)
Weighted- average exercise price per share beginning balance (in dollars per share) | $ / shares	$ 52.70
Granted (in dollars per share) | $ / shares	84.29
Exercised (in dollars per share) | $ / shares	35.03
Forfeited (in dollars per share) | $ / shares	83.99
Expired (in dollars per share) | $ / shares	87.46
Weighted- average exercise price per share ending balance (in dollars per share) | $ / shares	61.76
Weighted- average exercise price per share, Vested and Expected to Vest (in dollars per share) | $ / shares	60.53
Weighted- average exercise price per share, Exercisable (in dollars per share) | $ / shares	$ 46.77
Weighted-average remaining contractual terms (years), Outstanding	5 years 10 months 13 days
Weighted-average remaining contractual terms (years), Vested and Expected to Vest	5 years 8 months 19 days
Weighted-average remaining contractual terms (years), Exercisable	4 years 2 months 8 days
Aggregate intrinsic value, Outstanding | $	$ 83,277
Aggregate intrinsic value, Vested and Expected to Vest | $	81,011
Aggregate intrinsic value, Exercisable | $	$ 64,145