Pensions and Other Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	$ 903	$ 774
Interest cost	1,167	1,353
Expected return on plan assets	(506)	(534)
Amortization of prior service cost (credit)	18	12
Amortization of losses (gains)	1,478	1,171
Curtailments and settlements	322	195
Net periodic benefit cost	3,382	2,971
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	0	0
Interest cost	410	3,000
Expected return on plan assets	0	(2,825)
Amortization of prior service cost (credit)	36	36
Amortization of losses (gains)	82	1,650
Curtailments and settlements	0	0
Net periodic benefit cost	528	1,861
U.S. Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	33	31
Interest cost	77	85
Amortization of prior service cost (credit)	(209)	(209)
Amortization of losses (gains)	(23)	(8)
Net periodic benefit cost	(122)	(101)
Non-U.S. Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net service cost	64	67
Interest cost	24	36
Amortization of prior service cost (credit)	0	0
Amortization of losses (gains)	14	17
Net periodic benefit cost	102	$ 120
Republic of China (Taiwan) [Member] | Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Company pension contributions	$ 4,409