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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 44,309	$ 54,379	$ 99,997	$ 107,624
Other comprehensive income (loss):
Foreign currency translation adjustment and other	(3,071)	(33,150)	6,814	(7,719)
Amortization of net loss and prior service benefit included in net periodic cost for pension and other post-retirement benefit plans	374	790	748	1,249
Comprehensive income, before income taxes	41,612	22,019	107,559	101,154
Less: Income tax expense (benefit) related to items of other comprehensive income	1,232	(2,320)	1,130	(598)
Comprehensive income, net of income taxes	40,380	24,339	106,429	101,752
Less: Comprehensive income (loss) related to noncontrolling interests, net of income taxes	88	(218)	1,101	960
Comprehensive income attributable to common shareholders, net of income taxes	$ 40,292	$ 24,557	$ 105,328	$ 100,792

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