Other Comprehensive Earnings (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Foreign currency translation adjustments [Abstract]
Foreign currency translation adjustments, before tax	$ 49,786	$ 43,045
Foreign currency translation adjustments, tax	(747)	9,263
Total foreign currency translation adjustment	49,039	52,308
Pension and other postretirement benefit plans [Abstract]
Pension and other postretirement benefit plans, before tax	952	3,410
Pension and other postretirement benefit plans, tax	(205)	(728)
Total pension and other postretirement benefit plans	747	2,682
Changes in fair value of cash flow hedges [Abstract]
Changes in fair value of cash flow hedges, before tax	2,993	1,404
Changes in fair value of cash flow hedges, tax	(629)	(295)
Total cash flow hedges	2,364	1,109
Total other comprehensive earnings [Abstract]
Other comprehensive earnings (loss), before Tax	53,731	47,859
Other comprehensive earnings (loss), tax	(1,581)	8,240
Other comprehensive (loss) earnings	52,150	56,099
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	105,705	131,435
Other comprehensive earnings (loss)	52,150	56,099
Comprehensive earnings	157,855	187,534
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	25,339	0
Tax benefit	0	0
Net of tax	25,339	0
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Pension And Other Postretirement Benefit Plans Net Of Tax Abstract [Abstract]
Amortization of actuarial losses	228	2,471
Amortization of prior service costs	724	939
Total before tax	952	3,410
Tax (benefit) provision	(205)	(728)
Net of tax	747	2,682
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Derivatives Net of Tax [Abstract]
Net (gains) losses reclassified into earnings	(291)	(320)
Tax expense (benefit)	61	67
Net of tax	$ (230)	$ (253)