Employee and Retiree Benefit Plans - Amount Related to Foreign Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at December 31		$ 547,484	$ 487,094
Foreign Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at December 31		197,965	170,551
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at December 31	$ 883,269	777,645	881,932
Fair value of plan assets at December 31	547,484	487,094	563,825
Net plan liabilities recognized	(335,785)	(290,551)
Net periodic benefit expense (benefit)	25,150	28,840	24,102
Pension Benefits | Foreign Plans
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at December 31		209,923	173,860
Fair value of plan assets at December 31		197,965	170,551
Net plan liabilities recognized		(11,957)	3,309
Net periodic benefit expense (benefit)		(933)	3,983
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at December 31	108,401	94,779	106,276
Fair value of plan assets at December 31	0	0	0
Net plan liabilities recognized	(108,401)	(94,779)
Net periodic benefit expense (benefit)	$ 5,230	5,354	4,971
Other Postretirement Benefits | Foreign Plans
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at December 31		387	812
Fair value of plan assets at December 31		0	0
Net plan liabilities recognized		387	812
Net periodic benefit expense (benefit)		$ 147	$ 146