STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 29, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of assumptions used in estimating fair value of each option grant

	2018		2017		2016
Expected volatility	33.39	%	33.76	%	33.88	%
Risk-free interest rate	2.67	%	2.12	%	1.83	%
Expected life from vesting date	3.0 yrs		3.0 yrs		3.0 yrs
Dividend yield	1.07	%	1.17	%	1.13	%

Summary of activity of stock plans

Following is a summary of the stock option activity during 2016, 2017 and 2018:

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at December 26, 2015	849,609		$	117.42
Granted	85,092		151.37
Exercised	(109,893	)	101.69
Forfeited	(31,635	)	129.36
Outstanding at December 31, 2016	793,173		$	122.77	4.78	$	16,640
Options vested or expected to vest at December 31, 2016	774,139		$	124.18	4.75	16,200
Options exercisable at December 31, 2016	469,844		$	123.75	3.96	9,056

The weighted average per share fair value of options granted during 2016 was $40.00.

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at December 31, 2016	793,173		$	122.77
Granted	67,965		164.35
Exercised	(284,574	)	121.92
Forfeited	(5,942	)	104.26
Outstanding at December 30, 2017	570,622		$	128.34	4.66	$	21,806
Options vested or expected to vest at December 30, 2017	558,114		$	128.00	4.63	21,517
Options exercisable at December 30, 2017	351,794		$	123.90	3.94	15,005

The weighted average per share fair value of options granted during 2017 was $43.68.

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at December 30, 2017	570,622		$	128.34
Granted	105,135		112.08
Exercised	(63,717	)	106.26
Forfeited	(33,627	)	129.52
Outstanding at December 29, 2018	578,413		$	127.74	4.35	$	909
Options vested or expected to vest at December 29, 2018	565,952		$	127.84	4.30	909
Options exercisable at December 29, 2018	405,128		$	126.61	3.47	909

The weighted average per share fair value of options granted during 2018 was $30.48.

Summary of status of stock options outstanding

Following is a summary of the status of stock options outstanding at December 29, 2018:

Outstanding and Exercisable By Price Range
Options Outstanding					Options Exercisable
Exercise Price Range	Number	Weighted Average Remaining Contractual Life	Weighted Average Exercise Price		Number	Weighted Average Exercise Price
$104.47 - 114.11	277,757	5.09 years	$	107.39	171,607	$	104.47
$120.91 - 136.42	114,910	2.25 years	134.02		114,627	134.01
$142.67 - 164.35	185,746	4.55 years	154.31		118,894	151.44
	578,413				405,128

Schedule of non-vested stock and restricted stock units

	2018		2017		2016
Shares granted	88,127		62,160		58,961
Weighted‑average per share price on grant date	$	114.89	$	163.18	$	150.48
Recognized compensation expense	$	6,328	$	5,569	$	4,069