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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jun. 25, 2016	Jul. 01, 2017	Jun. 25, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 54,602	$ 35,557	$ 101,561	$ 73,106
Other comprehensive income (loss):
Foreign currency translation adjustment and other	33,451	(8,114)	44,672	(15,910)
Amortization of net loss and prior service benefit included in net periodic cost for pension and other post-retirement benefit plans	901	395	1,755	785
Comprehensive income, before income taxes	88,954	27,838	147,988	57,981
Income tax expense related to items of other comprehensive income (Note 9)	397	142	623	284
Comprehensive income, net of income taxes	88,557	27,696	147,365	57,697
Less: Comprehensive income (loss) related to noncontrolling interests, net of income taxes	900	(136)	1,198	(9)
Comprehensive income attributable to common shareholders, net of income taxes	$ 87,657	$ 27,832	$ 146,167	$ 57,706

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