Other Comprehensive Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Comprehensive Income (Loss), Net of Tax [Abstract]
TranslationAdjustmentForNetInvestmentHedgeIncreaseDecrease	$ (6,058)	$ 3,631	$ (7,723)	$ 27,957
Foreign currency translation adjustments [Abstract]
Foreign currency translation adjustments, before tax	9,370	(55,942)	(24,436)	(95,087)
Foreign currency translation adjustments, tax	2,119	(1,271)	2,702	(9,785)
Total foreign currency translation	11,489	(57,213)	(21,734)	(104,872)
Pension and other postretirement benefit plans [Abstract]
Pension and other postretirement benefit plans, before tax	3,695	5,753	11,084	17,316
Pension and other postretirement benefit plans, tax	(1,242)	(1,951)	(3,725)	(5,871)
Total pension and other postretirement benefit plans	2,453	3,802	7,359	11,445
Changes in fair value of cash flow hedges [Abstract]
Changes in fair value of cash flow hedges, before tax	(488)	(760)	(557)	505
Changes in fair value of cash flow hedges, tax	170	267	195	(176)
Total cash flow hedges	(318)	(493)	(362)	329
Other comprehensive earnings other adjustment, net of tax [Abstract]
Other, before tax	269	445	1,853	1,003
Other, tax	(29)	(52)	(221)	(119)
Other comprehensive earnings other adjustment	240	393	1,632	884
Total other comprehensive earnings [Abstract]
Other comprehensive earnings (loss), before Tax	12,846	(50,504)	(12,056)	(76,263)
Other comprehensive earnings (loss), tax	1,018	(3,007)	(1,049)	(15,951)
Other comprehensive earnings (loss)	13,864	(53,511)	(13,105)	(92,214)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	130,084	186,098	347,730	728,004
Other comprehensive earnings (loss)	13,864	(53,511)	(13,105)	(92,214)
Comprehensive earnings	143,948	132,587	334,625	635,790
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Pension And Other Postretirement Benefit Plans Net Of Tax Abstract [Abstract]
Amortization of actuarial losses	2,080	3,868	6,241	11,660
Amortization of prior service costs	1,615	1,885	4,843	5,656
Total before tax	3,695	5,753	11,084	17,316
Tax provision	(1,242)	(1,951)	(3,725)	(5,871)
Net of tax	2,453	3,802	7,359	11,445
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Derivatives Net of Tax [Abstract]
Cash flow hedges	(55)	(1,042)	201	(318)
Tax benefit	19	364	(70)	111
Net of tax	$ (36)	$ (678)	$ 131	$ (207)