Benefit Plans Benefit Plans (Detail 11) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 51,976
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	51,607
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	53,847
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	52,296
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	53,275
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 266,869
Pension Plan [Member] | Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.11%	3.49%
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 8,051
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	8,247
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	8,396
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	8,546
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	8,698
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 43,532
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.49%	3.97%	4.27%
Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	1.22%	0.97%
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 43,494
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	43,111
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	45,220
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	43,543
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	44,397
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 222,671
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	0.97%	0.98%	1.31%
Other Postretirement Benefits Plan [Member] | Domestic Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.65%	2.55%
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 431
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	249
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	231
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	207
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	180
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 666
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.15%	3.41%	3.54%
Healthcare Cost Trend Rate Maximum	6.40%	7.50%
Healthcare Cost Trend Rate Minimum Percentage	7.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%