Other Comprehensive Earnings (Loss), Changes in the components of accumulated other comprehensive loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	$ (294,514)	$ (239,425)
Adoption of ASU 2018-02		(21,503)
Other comprehensive earnings (loss), net of tax, total	12,175	(31,467)
Total accumulated other comprehensive earnings (loss), End of Period	(282,339)	(292,395)
Pension and Postretirement Amounts [Member]
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	(143,134)	(110,971)
Adoption of ASU 2018-02		(18,065)
Other comprehensive earnings (loss), net of tax, total	1,139	(24,238)
Total accumulated other comprehensive earnings (loss), End of Period	(141,995)	(153,274)
Gains (Losses) On Derivative Instruments [Member]
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	1,549	(32,827)
Adoption of ASU 2018-02		(3,660)
Other comprehensive earnings (loss), net of tax, total	3,778	(19,915)
Total accumulated other comprehensive earnings (loss), End of Period	5,327	(56,402)
Gains (Losses) On Derivative Instruments [Member] | Interest Rate Contract [Member]
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), End of Period	(18,963)
Gains (Losses) On Derivative Instruments [Member] | Foreign Exchange Forward [Member]
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), End of Period	(24,290)
Unrealized Holding Gains (Losses) on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	(744)	1,034
Adoption of ASU 2018-02		222
Other comprehensive earnings (loss), net of tax, total	265	(143)
Total accumulated other comprehensive earnings (loss), End of Period	(479)	1,113
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive (Loss) [Line Items]
Total accumulated other comprehensive earnings (loss), Beginning of Year	(152,185)	(96,661)
Adoption of ASU 2018-02		0
Other comprehensive earnings (loss), net of tax, total	6,993	12,829
Total accumulated other comprehensive earnings (loss), End of Period	$ (145,192)	$ (83,832)