INCOME TAXES (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 30, 2018	Dec. 31, 2017
Deferred tax liabilities:
PP&E and identified intangible assets	$ 217,353	$ 213,500
Inventories	69,464	57,641
Insurance claims and losses	29,964	29,253
Business combinations	46,779	50,695
Other	23,434	18,519
Total deferred tax liabilities	386,994	369,608
Deferred tax assets:
Net operating losses	2,923	3,276
Foreign net operating losses	38,531	26,934
Credit carry forwards	14,461	2,425
Allowance for doubtful accounts	6,788	1,767
Deferred revenue	1,860	0
Accrued liabilities	52,181	50,389
Workers compensation	0	26,119
Pension and other postretirement benefits	0	13,379
Other	63,227	51,306
Total deferred tax assets	179,971	175,595
Valuation allowance	(26,150)	(14,479)
Net deferred tax assets	153,821	161,116
Net deferred tax liabilities	$ 233,173	$ 208,492