Benefit Plans Textuals (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost	$ 18,800	$ 18,900	$ 17,200
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	184,400
Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation	195,300
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets	$ 51,500
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.03%	4.11%
Defined Benefit Plan, Accumulated Benefit Obligation	$ 142,500	$ 130,200
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	Target asset allocation ranges for the U.S. pension plan include 40-60% in equity securities, 13-33% in fixed income securities, and 15-25% in other types of investments.
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.11%	3.49%	3.97%
Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	0.51%	1.22%
Defined Benefit Plan, Accumulated Benefit Obligation	$ 812,000	$ 731,400
Defined Benefit Plan, Plan Assets, Investment Policy and Strategy, Description	International plan assets relate primarily to the Company’s Swiss plan with target allocations of 24-45% in equities, 35-55% in fixed income securities, and 15-25% in other types of investments.
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 25,600
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	1.22%	0.97%	0.98%
Other Postretirement Benefits Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.54%	2.65%
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 200
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.75%	3.15%	3.41%
Healthcare Cost Trend Rate Maximum	6.20%	7.00%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%
Healthcare Cost Trend Rate Minimum Percentage	6.40%