Other Comprehensive Earnings (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Foreign currency translation adjustments [Abstract]
Foreign currency translation adjustments, before tax	$ 36,541	$ (14,967)	$ (51,874)	$ 34,819
Foreign currency translation adjustments, tax	8,028	989	2,889	242
Total foreign currency translation adjustment	44,569	(13,978)	(48,985)	35,061
Pension and other postretirement benefit plans [Abstract]
Pension and other postretirement benefit plans, before tax	2,515	766	5,037	1,718
Pension and other postretirement benefit plans, tax	(421)	(177)	(989)	(382)
Total pension and other postretirement benefit plans	2,094	589	4,048	1,336
Changes in fair value of cash flow hedges [Abstract]
Changes in fair value of cash flow hedges, before tax	1,651	(4,780)	(3,423)	(1,787)
Changes in fair value of cash flow hedges, tax	(365)	1,002	757	373
Total cash flow hedges	1,286	(3,778)	(2,666)	(1,414)
Total other comprehensive earnings [Abstract]
Other comprehensive earnings (loss), before Tax	40,707	(18,981)	(50,260)	34,750
Other comprehensive earnings (loss), tax	7,242	1,814	2,657	233
Other comprehensive (loss) earnings	47,949	(17,167)	(47,603)	34,983
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	124,766	198,085	301,045	303,790
Other comprehensive earnings (loss)	47,949	(17,167)	(47,603)	34,983
Comprehensive earnings	172,715	180,918	253,442	338,773
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	2,150	122	4,307	350
Amortization of prior service costs	365	644	730	1,368
Total before tax	2,515	766	5,037	1,718
Tax (benefit) provision	(421)	(177)	(989)	(382)
Net of tax	2,094	589	4,048	1,336
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Derivatives Net of Tax [Abstract]
Net (gains) losses reclassified into earnings	(752)	(524)	668	(815)
Tax expense (benefit)	158	108	(140)	169
Net of tax	$ (594)	$ (416)	$ 528	$ (646)

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