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Equity and Redeemable Noncontrolling Interest - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
Other comprehensive loss before reclassifications			$ 68,590
Amounts reclassified from accumulated other comprehensive income (loss)			2,638
Net current period other comprehensive income			71,228
Income tax expense	$ 153	$ 140	776	$ 424
Foreign Currency Translation Adjustment and Other
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
December 31, 2016			(154,595)
Other comprehensive loss before reclassifications			68,590
Amounts reclassified from accumulated other comprehensive income (loss)			0
Net current period other comprehensive income			68,590
Income tax expense			0
September 30, 2017	(86,005)		(86,005)
Pension and Other Post-Retirement Benefit Plans
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
December 31, 2016			(99,169)
Other comprehensive loss before reclassifications			0
Amounts reclassified from accumulated other comprehensive income (loss)			2,638
Net current period other comprehensive income			2,638
Income tax expense	200	$ 100	776	$ 400
September 30, 2017	(97,307)		(97,307)
Total
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
December 31, 2016			(253,764)
September 30, 2017	$ (183,312)		$ (183,312)