Accumulated Other Comprehensive Income (Schedule of Reclassifications out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Tax expense (benefit)	$ 20,600	$ 16,045	$ 65,611	$ 60,693
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			9,681
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	4,743	272	13,760	79
Tax expense (benefit)	1,374	67	4,079	(24)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	3,369	205	9,681	103
Foreign Currency Exchange Contracts [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	5,003	540	14,547	874
Interest Rate Swaps [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	$ (260)	$ (268)	$ (787)	$ (795)