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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Apr. 01, 2017
Statement of Comprehensive Income [Abstract] |  |
Net income | $ 53,245 | $ 46,959
Other comprehensive income: |  |
Foreign currency translation adjustment and other | 25,431 | 11,221
Amortization of net loss and prior service benefit included in net periodic cost for pension and other post-retirement benefit plans | 459 | 854
Comprehensive income, before income taxes | 79,135 | 59,034
Less: Income tax expense related to items of other comprehensive income | 1,722 | 226
Comprehensive income, net of income taxes | 77,413 | 58,808
Less: Comprehensive income related to noncontrolling interest, net of income taxes | 1,178 | 298
Comprehensive income attributable to common shareholders | $ 76,235 | $ 58,510

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