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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 52,955	$ 38,033	$ 154,516	$ 111,139
Other comprehensive income (loss):
Foreign currency translation adjustment and other	24,570	(16,888)	69,242	(32,798)
Amortization of net loss and prior service benefit included in net periodic cost for pension and other post-retirement benefit plans	883	1,176	2,638	1,961
Comprehensive income, before income taxes	78,408	22,321	226,396	80,302
Income tax expense related to items of other comprehensive income (Note 9)	153	140	776	424
Comprehensive income, net of income taxes	78,255	22,181	225,620	79,878
Less: Comprehensive income (loss) related to noncontrolling interests, net of income taxes	766	0	1,964	(9)
Comprehensive income attributable to common shareholders, net of income taxes	$ 77,489	$ 22,181	$ 223,656	$ 79,887

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