Accumulated Other Comprehensive Income (Schedule of Reclassifications out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Provision for income taxes	$ 81,006	$ 64,604	$ 75,467
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	13,983	2,002
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	19,836	2,758	2,569
Provision for income taxes	5,853	756	679
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	13,983	2,002	1,890
Interest Rate Swaps [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(1,042)	(1,064)	(900)
Foreign Currency Exchange Contracts [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	$ 20,878	$ 3,822	$ 3,469