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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 102,611	$ 73,552	$ 221,116	$ 173,549
Other comprehensive income (loss):
Foreign currency translation adjustment and other	20,112	(15,889)	(17,993)	(9,075)
Amortization of net loss and prior service benefit included in net periodic cost for pension and other post-retirement benefit plans	1,411	365	4,150	1,113
Comprehensive income, before income taxes	124,134	58,028	207,273	165,587
Less: Income tax expense (benefit) related to items of other comprehensive income	3,201	(2,511)	3,024	(1,381)
Comprehensive income, net of income taxes	120,933	60,539	204,249	166,968
Less: Comprehensive income (loss) related to noncontrolling interests, net of income taxes	591	(37)	399	1,064
Comprehensive income attributable to common shareholders, net of income taxes	$ 120,342	$ 60,576	$ 203,850	$ 165,904

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