Other Comprehensive Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Gain (loss) on euro net investment hedge, gross	$ (9,691)	$ 6,578	$ 24,326	$ 3,342
Foreign currency translation adjustments [Abstract]
Foreign currency translation adjustments, before tax	33,058	13,274	(39,145)	(5,232)
Foreign currency translation adjustments, tax	3,392	(2,303)	(8,514)	(1,170)
Total foreign currency translation	36,450	10,971	(47,659)	(6,402)
Pension and other postretirement benefit plans [Abstract]
Pension and other postretirement benefit plans, before tax	5,775	4,341	11,563	8,680
Pension and other postretirement benefit plans, tax	(1,958)	(1,506)	(3,920)	(3,011)
Total pension and other postretirement benefit plans	3,817	2,835	7,643	5,669
Changes in fair value of cash flow hedges [Abstract]
Changes in fair value of cash flow hedges, before tax	(364)	45	1,265	(898)
Changes in fair value of cash flow hedges, tax	127	(16)	(443)	314
Total cash flow hedges	(237)	29	822	(584)
Other comprehensive earnings other adjustment, net of tax [Abstract]
Other, before tax	317	873	558	767
Other, tax	(40)	(128)	(67)	(148)
Other comprehensive earnings (loss) other adjustment	277	745	491	619
Total other comprehensive earnings [Abstract]
Other comprehensive earnings (loss), before Tax	38,786	18,533	(25,759)	3,317
Other comprehensive earnings (loss), tax	1,521	(3,953)	(12,944)	(4,015)
Other comprehensive earnings (loss), net of tax	40,307	14,580	(38,703)	(698)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	332,396	213,959	541,906	374,097
Other comprehensive earnings (loss)	40,307	14,580	(38,703)	(698)
Comprehensive earnings	372,703	228,539	503,203	373,399
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Pension And Other Postretirement Benefit Plans Net Of Tax Abstract [Abstract]
Amortization of actuarial losses	3,890	2,203	7,792	4,402
Amortization of prior service costs	1,885	2,138	3,771	4,278
Total before tax	5,775	4,341	11,563	8,680
Tax provision	(1,958)	(1,506)	(3,920)	(3,011)
Net of tax	3,817	2,835	7,643	5,669
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Derivatives Net of Tax [Abstract]
Cash flow hedges	877	(77)	724	(291)
Tax (provision) benefit	(307)	27	(253)	102
Net of tax	$ 570	$ (50)	$ 471	$ (189)