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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 151,087	$ 128,198	$ 104,151
Foreign currency translation adjustment and other	(61,982)	(48,955)	(15,322)
Cumulative translation adjustment related to intercompany loan forgiveness	(2,341)	0	0
Pension and other post-retirement benefit plans:
Prior service cost and gains (losses) arising during the period	(302)	(42,236)	19,293
Amortization of net gains (losses) and prior service benefit included in net periodic pension cost	2,617	1,234	3,017
Comprehensive income, before income taxes	89,079	38,241	111,139
Income tax expense (benefit) related to items of other comprehensive income	530	(9,897)	7,805
Comprehensive income, net of income taxes	88,549	48,138	103,334
Less: Comprehensive income related to noncontrolling interests	537	1,044	1,752
Comprehensive income attributable to common shareholders	$ 88,012	$ 47,094	$ 101,582

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