STOCKHOLDERS' EQUITY (Schedule of Changes in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 24, 2017	Sep. 30, 2018	Sep. 24, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			$ 1,855,661	$ 2,086,132
Granite Holdings Sarl common-control transaction				203,209
Other comprehensive income (loss) before reclassifications			(52,459)	89,688
Amounts reclassified from accumulated other comprehensive income (loss) to net income			56	444
Impact of currency translation			(5)
Total other comprehensive income (loss), net of tax	$ (19,677)	$ 25,200	(52,408)	90,132
Balance, end of period	2,067,543	1,710,236	2,067,543	1,710,236
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			(31,140)	(329,858)
Total other comprehensive income (loss), net of tax			(52,408)	90,132
Balance, end of period	(83,548)	(36,517)	(83,548)	(36,517)
Gains (Losses) Related to Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			42,081	(265,714)
Granite Holdings Sarl common-control transaction				204,577
Other comprehensive income (loss) before reclassifications			(58,892)	92,364
Amounts reclassified from accumulated other comprehensive income (loss) to net income			0	0
Impact of currency translation			0
Total other comprehensive income (loss), net of tax			(58,892)	92,364
Balance, end of period	(16,811)	31,227	(16,811)	31,227
Unrealized Gains (Losses) on Derivative Financial Instruments Classified as Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			(1,848)	99
Granite Holdings Sarl common-control transaction				(1,368)
Other comprehensive income (loss) before reclassifications			33	(137)
Amounts reclassified from accumulated other comprehensive income (loss) to net income			329	9
Impact of currency translation			(5)
Total other comprehensive income (loss), net of tax			357	(128)
Balance, end of period	(1,491)	(1,397)	(1,491)	(1,397)
Losses Related to Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			(71,434)	(64,243)
Granite Holdings Sarl common-control transaction				0
Other comprehensive income (loss) before reclassifications			5,415	(2,539)
Amounts reclassified from accumulated other comprehensive income (loss) to net income			683	435
Impact of currency translation			0
Total other comprehensive income (loss), net of tax			6,098	(2,104)
Balance, end of period	(65,336)	(66,347)	(65,336)	(66,347)
Unrealized Holding Gains on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of period			61	0
Granite Holdings Sarl common-control transaction				0
Other comprehensive income (loss) before reclassifications			985	0
Amounts reclassified from accumulated other comprehensive income (loss) to net income			(956)	0
Impact of currency translation			0
Total other comprehensive income (loss), net of tax			29	0
Balance, end of period	$ 90	$ 0	$ 90	$ 0