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STOCK-BASED COMPENSATION (Stock Option Activity) (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 29, 2018
USD ($)
$ / shares
shares
Stock Options (Number of shares)  
Outstanding, beginning balance (in shares) | shares 1,494,223
Granted (in shares) | shares 255,532
Exercised (in shares) | shares (261,113)
Forfeited (in shares) | shares (40,533)
Expired (in shares) | shares (968)
Outstanding, ending balance (in shares) | shares 1,447,141
Vested and expected to vest (in shares) | shares 1,377,440
Exercisable (in shares) | shares 851,264
Stock Options (Weighted-average exercise price)  
Weighted- average exercise price per share beginning balance (in dollars per share) | $ / shares $ 61.76
Granted (in dollars per share) | $ / shares 118.43
Exercised (in dollars per share) | $ / shares 40.58
Forfeited (in dollars per share) | $ / shares 98.01
Expired (in dollars per share) | $ / shares 95.10
Weighted- average exercise price per share ending balance (in dollars per share) | $ / shares 74.55
Weighted- average exercise price per share, Vested and Expected to Vest (in dollars per share) | $ / shares 73.10
Weighted- average exercise price per share, Exercisable (in dollars per share) | $ / shares $ 57.33
Weighted-average remaining contractual terms (years), Outstanding 5 years 11 months 15 days
Weighted-average remaining contractual terms (years), Vested and Expected to Vest 5 years 9 months 24 days
Weighted-average remaining contractual terms (years), Exercisable 4 years 3 months 22 days
Aggregate intrinsic value, Outstanding | $ $ 21,714
Aggregate intrinsic value, Vested and Expected to Vest | $ 21,714
Aggregate intrinsic value, Exercisable | $ $ 21,714