Segment Information (Schedule of Revenue by Geographic Location) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenues, net	$ 729,597	$ 634,646	$ 684,832	$ 706,579	$ 678,950	$ 632,165	$ 601,138	$ 668,682	$ 2,755,654	$ 2,580,935	$ 2,175,641
North America [Member]
Segment Reporting Information [Line Items]
Revenues, net									2,215,430	2,114,172
Europe [Member]
Segment Reporting Information [Line Items]
Revenues, net									384,234	317,759
Other Geographic Locations [Member]
Segment Reporting Information [Line Items]
Revenues, net									$ 155,990	$ 149,004