Benefit Plans Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	$ 41,862
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax	(32,699)	$ (23,326)	$ (10,378)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	(576)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax	(430)
Defined Benefit Plans, Amortization of Gains, Losses and Other Expenses	(22,188)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax	(17,594)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	6,721
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, after tax	5,450
Defined Benefit Plans, Impact of FX on Current Year Change in OCI	2,642
Defined Benefit Plans, Impact of FX on Current Year Change in OCI, net of tax	(2,108)	$ 3,522	$ (12,092)
Defined Benefit Plan, Changes in OCI Arising During the Period	28,461
Defined Benefit Plan, Changes in OCI Arising During the Period, net of tax	22,233
Pension Plan [Member] | Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	36,692
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	0
Defined Benefit Plans, Amortization of Gains, Losses and Other Expenses	(20,505)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	6,721
Defined Benefit Plans, Impact of FX on Current Year Change in OCI	2,642
Defined Benefit Plan, Changes in OCI Arising During the Period	25,550
Pension Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	5,299
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	0
Defined Benefit Plans, Amortization of Gains, Losses and Other Expenses	(2,374)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	0
Defined Benefit Plans, Impact of FX on Current Year Change in OCI	0
Defined Benefit Plan, Changes in OCI Arising During the Period	2,925
Other Postretirement Benefits Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	(129)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	(576)
Defined Benefit Plans, Amortization of Gains, Losses and Other Expenses	691
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	0
Defined Benefit Plans, Impact of FX on Current Year Change in OCI	0
Defined Benefit Plan, Changes in OCI Arising During the Period	$ (14)