CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 125,449	$ 156,366	$ 151,087
Other comprehensive income (loss):
Foreign currency translation adjustment and other	78,084	(73,243)	(61,982)
Cumulative translation adjustment related to intercompany loan forgiveness	0	0	(2,341)
Pension and other post-retirement benefit plans (Note 10):
Prior service cost and gains (losses) arising during the period	36,593	(60,678)	(302)
Amortization of net loss and prior service benefit included in net periodic pension cost	3,344	1,711	2,617
Comprehensive income, before income taxes	243,470	24,156	89,079
Income tax expense (benefit) related to items of other comprehensive income (Note 8)	7,954	(12,369)	530
Comprehensive income, net of income taxes	235,516	36,525	88,549
Less: Comprehensive income (loss) related to noncontrolling interest, net of income taxes	3,128	(24)	537
Comprehensive income attributable to common shareholders, net of income taxes	$ 232,388	$ 36,549	$ 88,012

Comprehensive Income (Loss), before Tax

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount before tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount before tax of reclassification adjustment from accumulated other comprehensive income for translation gain (loss) realized upon the sale or liquidation of an investment in a foreign entity and foreign currency hedges that are designated and qualified as hedging instruments for hedges of the foreign currency exposure of a net investment in a foreign operation.

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Amount, before tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for net period benefit cost (credit) of defined benefit plan.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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