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Retirement Plans (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 01, 2017
Apr. 02, 2016
Minimum    
Amounts Recognized in Other Comprehensive Income [Abstract]    
Estimated future employer contributions in current fiscal year $ 6,000  
Maximum    
Amounts Recognized in Other Comprehensive Income [Abstract]    
Estimated future employer contributions in current fiscal year 11,000  
U.S. Pension Plans    
Net Periodic Benefit Cost [Abstract]    
Service cost 101 $ 94
Interest cost 1,719 1,745
Expected return on plan assets (2,663) (2,417)
Net amortization: Net actuarial loss 651 667
Net periodic pension (benefit) cost (192) 89
U.S. Retiree Healthcare Plan    
Net Periodic Benefit Cost [Abstract]    
Service cost 103 116
Interest cost 150 135
Expected return on plan assets (147) (130)
Net periodic pension (benefit) cost 106 121
Non-U.S. Pension Plans    
Net Periodic Benefit Cost [Abstract]    
Service cost 1,251 1,218
Interest cost 358 421
Expected return on plan assets (402) (399)
Net amortization: Prior service credit (46) (45)
Net amortization: Net actuarial loss 231 188
Net periodic pension (benefit) cost $ 1,392 $ 1,383