CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jun. 25, 2016	Jul. 01, 2017	Jun. 25, 2016
Income Statement [Abstract]
NET SALES	$ 1,072,375	$ 872,093	$ 1,918,505	$ 1,554,244
COST OF GOODS SOLD	924,135	740,606	1,649,526	1,320,018
GROSS PROFIT	148,240	131,487	268,979	234,226
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	94,341	77,822	181,259	148,651
NET LOSS ON DISPOSITION AND IMPAIRMENT OF ASSETS			(328)	50
EARNINGS FROM OPERATIONS	53,899	53,665	87,720	85,575
INTEREST EXPENSE	1,840	1,103	3,343	2,179
INTEREST INCOME	(329)	(208)	(411)	(312)
EQUITY IN EARNINGS OF INVESTEE	(21)	(110)	(26)	(192)
NON-OPERATING (INCOME)/EXPENSE	1,490	785	2,906	1,675
EARNINGS BEFORE INCOME TAXES	52,409	52,880	84,814	83,900
INCOME TAXES	17,835	18,643	28,605	29,407
NET EARNINGS	34,574	34,237	56,209	54,493
LESS NET EARNINGS ATTRIBUTABLE TO NONCONTROLLING INTEREST	(932)	(839)	(1,505)	(1,882)
NET EARNINGS ATTRIBUTABLE TO CONTROLLING INTEREST	$ 33,642	$ 33,398	$ 54,704	$ 52,611
EARNINGS PER SHARE - BASIC (USD per share)	$ 1.64	$ 1.64	$ 2.67	$ 2.59
EARNINGS PER SHARE - DILUTED (USD per share)	$ 1.64	$ 1.64	$ 2.66	$ 2.58
OTHER COMPREHENSIVE INCOME
Net earnings	$ 34,574	$ 34,237	$ 56,209	$ 54,493
OTHER COMPREHENSIVE GAIN (LOSS)	1,387	(807)	4,422	(365)
COMPREHENSIVE INCOME	35,961	33,430	60,631	54,128
LESS COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTEREST	(1,460)	(235)	(2,887)	(1,081)
COMPREHENSIVE INCOME ATTRIBUTABLE TO CONTROLLING INTEREST	$ 34,501	$ 33,195	$ 57,744	$ 53,047