STOCKHOLDERS' EQUITY (Schedule of Changes in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 25, 2016	Dec. 27, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	$ 2,086,132	$ 2,659,875	$ 2,196,801
Amounts reclassified from accumulated other comprehensive loss to net income	81	(378)
Total other comprehensive income (loss), net of tax	95,509	(238,385)	(28,932)
Balance, end of year	1,855,661	2,086,132	2,659,875
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(329,858)	(91,473)	(62,541)
Granite Holdings Sàrl common-control transaction	203,209
Other comprehensive income (loss) before reclassifications	95,590	(238,763)
Amounts reclassified from accumulated other comprehensive loss to net income	(81)	378
Total other comprehensive income (loss), net of tax	95,509	(238,385)	(28,932)
Balance, end of year	(31,140)	(329,858)	(91,473)
Losses Related to Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(265,714)	(32,482)
Granite Holdings Sàrl common-control transaction	204,577
Other comprehensive income (loss) before reclassifications	103,218	(233,232)
Amounts reclassified from accumulated other comprehensive loss to net income	0	0
Total other comprehensive income (loss), net of tax	103,218	(233,232)
Balance, end of year	42,081	(265,714)	(32,482)
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 year	99	(61)
Granite Holdings Sàrl common-control transaction	(1,368)
Other comprehensive income (loss) before reclassifications	60	(151)
Amounts reclassified from accumulated other comprehensive loss to net income	(639)	311
Total other comprehensive income (loss), net of tax	(579)	160
Balance, end of year	(1,848)	99	(61)
Losses Related to Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(64,243)	(58,997)
Granite Holdings Sàrl common-control transaction	0
Other comprehensive income (loss) before reclassifications	(7,770)	(5,657)
Amounts reclassified from accumulated other comprehensive loss to net income	579	411
Total other comprehensive income (loss), net of tax	(7,191)	(5,246)
Balance, end of year	(71,434)	(64,243)	(58,997)
Unrealized Holding Gains on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	0	67
Granite Holdings Sàrl common-control transaction	0
Other comprehensive income (loss) before reclassifications	82	277
Amounts reclassified from accumulated other comprehensive loss to net income	(21)	(344)
Total other comprehensive income (loss), net of tax	61	(67)
Balance, end of year	$ 61	$ 0	$ 67