Pension and Other Postretirement Benefits - Cash Flow (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum Cash Contributions, Next Fiscal Year	$ 10,000
Expected Benefit Payments, Next Twelve Months	11,547
Expected Benefit Payments, Year Two	11,428
Expected Benefit Payments, Year Three	11,488
Expected Benefit Payments, Year Four	12,794
Expected Benefit Payments, Year Five	13,035
Expected Benefit Payments, Five Fiscal Years Thereafter	72,405
Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum Cash Contributions, Next Fiscal Year	400
Domestic plan [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum Cash Contributions, Next Fiscal Year	2,700
Expected Benefit Payments, Next Twelve Months	5,947
Expected Benefit Payments, Year Two	5,209
Expected Benefit Payments, Year Three	5,191
Expected Benefit Payments, Year Four	6,054
Expected Benefit Payments, Year Five	6,238
Expected Benefit Payments, Five Fiscal Years Thereafter	31,026
Domestic plan [Member] | Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected Benefit Payments, Next Twelve Months	426
Expected Benefit Payments, Year Two	400
Expected Benefit Payments, Year Three	373
Expected Benefit Payments, Year Four	354
Expected Benefit Payments, Year Five	326
Expected Benefit Payments, Five Fiscal Years Thereafter	1,291
Foreign [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum Cash Contributions, Next Fiscal Year	7,300
Expected Benefit Payments, Next Twelve Months	5,600
Expected Benefit Payments, Year Two	6,219
Expected Benefit Payments, Year Three	6,297
Expected Benefit Payments, Year Four	6,740
Expected Benefit Payments, Year Five	6,797
Expected Benefit Payments, Five Fiscal Years Thereafter	$ 41,379