STOCK-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Stock Based Compensation
Shares of common stock available for issuance	779,336
Number of Shares
Exercised (in shares)	(147,014)	(119,789)	(63,717)
Share-based Payment Arrangement, Option
Stock Based Compensation
Compensation expense (included in selling, general and administrative expenses)	$ 14,874	$ 11,587	$ 10,392
Tax benefits associated with compensation expense	$ 3,719	$ 2,897	$ 2,598
Weighted average period over which unrecognized stock option compensation cost would be recognized	2 years 4 months 20 days
Unrecognized stock option compensation expense	$ 5,364
Assumptions used in estimating fair value of each option grant
Expected volatility	33.72%	33.13%	33.39%
Risk-free interest rate	0.43%	1.69%	2.67%
Expected life from vesting date	4 years	3 years	3 years
Dividend yield	1.24%	1.07%	1.07%
Number of Shares
Balance at the beginning of the period (in shares)	488,560	578,413	570,622
Granted (in shares)	66,231	57,648	105,135
Exercised (in shares)	(147,014)	(119,789)	(63,717)
Forfeited (in shares)	(8,212)	(27,712)	(33,627)
Balance at the end of the period (in shares)	399,565	488,560	578,413
Options vested or expected to vest (in shares)	389,633	478,575	565,592
Options exercisable (in shares)	254,498	341,828	405,128
Weighted Average Exercise Price
Balance at the beginning of the period (in dollars per share)	$ 133.13	$ 127.74	$ 128.34
Granted (in dollars per share)	168.80	147.31	112.08
Exercised (in dollars per share)	125.43	113.02	106.26
Forfeited (in dollars per share)	137.49	137.07	129.52
Balance at the end of the period (in dollars per share)	141.79	133.13	127.74
Options vested or expected to vest (in dollars per share)	141.56	133.21	127.84
Options exercisable (in dollars per share)	$ 138.64	$ 133.32	$ 126.61
Weighted Average Remaining Contractual Term
Options outstanding	4 years 10 months 17 days	4 years 14 days	4 years 4 months 6 days
Options vested or expected to vest	4 years 9 months 21 days	3 years 11 months 26 days	4 years 3 months 18 days
Options exercisable	3 years 4 months 17 days	3 years 2 months 8 days	3 years 5 months 19 days
Aggregate Intrinsic Value
Options outstanding	$ 12,103	$ 9,291	$ 909
Options vested or expected to vest	11,890	9,078	909
Options exercisable	$ 8,510	$ 6,470	$ 909
Other option disclosures
Weighted average per share fair value of option granted	$ 45.49	$ 37.85	$ 30.48
Share-based Payment Arrangement, Option | Maximum
Stock Based Compensation
Expiration period of grant	10 years
Share-based Payment Arrangement, Option | Minimum
Stock Based Compensation
Vesting period of options	3 years
Expiration period of grant	7 years
Restricted Stock and Awards
Assumptions used in estimating fair value of each option grant
Expected life from vesting date	3 years