Employee and Retiree Benefit Plans (Amount Related to Foreign Benefit Plans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Foreign Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at December 31	$ 206,502	$ 197,549
Fair value of plan assets at December 31	197,575	193,933
Net plan liabilities recognized	8,927	3,616
Net periodic benefit expense (benefit)	(2,244)	4,703
Foreign Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at December 31	615	643
Net plan liabilities recognized	615	643
Net periodic benefit expense (benefit)	$ 154	$ 152