Pension and Other Postretirement Benefits - Information About Accumulated and Projected Benefit Obligations In Excess of Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Fair Value of Plan Assets	$ 302,270	$ 315,649	$ 144,241
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract]
Fair Value of Plan Assets	302,270	315,649	144,241
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected Benefit Obligation	357,644	371,616	170,050
Defined Benefit Plan Pension Plan With Projected Benefit Obligation In Excess Of Plan Assets Projected Benefit Obligation	142,342	371,616
Accumulated Benefit Obligation	140,432	365,990
Fair Value of Plan Assets	91,555	315,649
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract]
Defined Benefit Plan Pension Plan With Projected Benefit Obligation In Excess Of Plan Assets Projected Benefit Obligation	142,342	371,616
Projected Benefit Obligation	357,644	371,616	170,050
Fair Value of Plan Assets	91,555	315,649
Domestic plan [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Fair Value of Plan Assets	73,481	120,550	49,415
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract]
Fair Value of Plan Assets	73,481	120,550	49,415
Domestic plan [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected Benefit Obligation	109,969	153,723	58,734
Defined Benefit Plan Pension Plan With Projected Benefit Obligation In Excess Of Plan Assets Projected Benefit Obligation	109,969	153,723
Accumulated Benefit Obligation	109,540	152,930
Fair Value of Plan Assets	73,481	120,550
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract]
Defined Benefit Plan Pension Plan With Projected Benefit Obligation In Excess Of Plan Assets Projected Benefit Obligation	109,969	153,723
Projected Benefit Obligation	109,969	153,723	58,734
Fair Value of Plan Assets	73,481	120,550
Foreign [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Fair Value of Plan Assets	228,789	195,099	94,826
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract]
Fair Value of Plan Assets	228,789	195,099	94,826
Foreign [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected Benefit Obligation	247,675	217,893	111,316
Defined Benefit Plan Pension Plan With Projected Benefit Obligation In Excess Of Plan Assets Projected Benefit Obligation	32,373	217,893
Accumulated Benefit Obligation	30,892	213,060
Fair Value of Plan Assets	18,074	195,099
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets [Abstract]
Defined Benefit Plan Pension Plan With Projected Benefit Obligation In Excess Of Plan Assets Projected Benefit Obligation	32,373	217,893
Projected Benefit Obligation	247,675	217,893	$ 111,316
Fair Value of Plan Assets	$ 18,074	$ 195,099