Other Comprehensive Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Foreign currency translation adjustments [Abstract]
Foreign currency translation adjustments, before tax	$ 19,399	$ (42,931)	$ (32,475)	$ (8,112)
Foreign currency translation adjustments, tax	9,872	(7,934)	12,761	(7,692)
Total foreign currency translation adjustment	29,271	(50,865)	(19,714)	(15,804)
Pension and other postretirement benefit plans [Abstract]
Pension and other postretirement benefit plans, before tax	2,552	856	7,587	2,574
Pension and other postretirement benefit plans, tax	(421)	(190)	(1,408)	(572)
Total pension and other postretirement benefit plans	2,131	666	6,179	2,002
Changes in fair value of cash flow hedges [Abstract]
Changes in fair value of cash flow hedges, before tax	(627)	1,419	(4,050)	(368)
Changes in fair value of cash flow hedges, tax	139	(297)	896	76
Total cash flow hedges	(488)	1,122	(3,154)	(292)
Total other comprehensive earnings [Abstract]
Other comprehensive earnings (loss), before Tax	21,324	(40,656)	(28,938)	(5,906)
Other comprehensive earnings (loss), tax	9,590	(8,421)	12,249	(8,188)
Other comprehensive (loss) earnings	30,914	(49,077)	(16,689)	(14,094)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	200,300	206,006	501,345	509,796
Other comprehensive earnings (loss)	30,914	(49,077)	(16,689)	(14,094)
Comprehensive earnings	231,214	156,929	484,656	495,702
Other Comprehensive Income Loss Reclassification Adjustment from AOCI Foreign Currency Translation Net of Tax [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax	0	0	0	(25,339)
Tax benefit	0	0	0	0
Net of tax	0	0	0	25,339
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Pension And Other Postretirement Benefit Plans Net Of Tax Abstract [Abstract]
Amortization of actuarial losses	2,194	176	6,501	526
Amortization of prior service costs	358	680	1,086	2,048
Total before tax	2,552	856	7,587	2,574
Tax (benefit) provision	(421)	(190)	(1,408)	(572)
Net of tax	2,131	666	6,179	2,002
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Derivatives Net of Tax [Abstract]
Net (gains) losses reclassified into earnings	(266)	730	402	(85)
Tax expense (benefit)	56	(153)	(84)	16
Net of tax	$ (210)	$ 577	$ 318	$ (69)