CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Income Statement [Abstract]
NET SALES	$ 1,056,586	$ 826,665	$ 2,975,091	$ 2,380,909
COST OF GOODS SOLD	911,899	708,611	2,561,424	2,028,629
GROSS PROFIT	144,687	118,054	413,667	352,280
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	92,416	74,502	273,676	223,153
EARNINGS FROM OPERATIONS	52,271	43,552	139,991	129,127
INTEREST EXPENSE	1,481	1,096	4,825	3,274
INTEREST INCOME	(130)	(119)	(541)	(431)
EQUITY IN EARNINGS OF INVESTEE	1	(50)	(25)	(241)
NON-OPERATING (INCOME)/EXPENSE	1,352	927	4,259	2,602
EARNINGS BEFORE INCOME TAXES	50,919	42,625	135,732	126,525
INCOME TAXES	16,250	13,861	44,855	43,268
NET EARNINGS	34,669	28,764	90,877	83,257
LESS NET EARNINGS ATTRIBUTABLE TO NONCONTROLLING INTEREST	(976)	(945)	(2,480)	(2,828)
NET EARNINGS ATTRIBUTABLE TO CONTROLLING INTEREST	$ 33,693	$ 27,819	$ 88,397	$ 80,429
EARNINGS PER SHARE - BASIC (USD per share)	$ 1.65	$ 1.36	$ 4.32	$ 3.95
EARNINGS PER SHARE - DILUTED (USD per share)	$ 1.64	$ 1.36	$ 4.31	$ 3.94
OTHER COMPREHENSIVE INCOME
Net earnings	$ 34,669	$ 28,764	$ 90,877	$ 83,257
OTHER COMPREHENSIVE GAIN (LOSS)	1,719	(1,156)	6,141	(1,521)
COMPREHENSIVE INCOME	36,388	27,608	97,018	81,736
LESS COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTEREST	(975)	(495)	(3,862)	(1,576)
COMPREHENSIVE INCOME ATTRIBUTABLE TO CONTROLLING INTEREST	$ 35,413	$ 27,113	$ 93,156	$ 80,160