Segment Information (Schedule of Revenue by Geographic Location) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues, net	$ 785,204	$ 718,597	$ 772,299	$ 784,221	$ 772,846	$ 696,875	$ 761,385	$ 740,823	$ 3,060,321	$ 2,971,929	$ 2,805,691
North America [Member]
Segment Reporting Information [Line Items]
Revenues, net									2,511,686	2,389,624	2,244,057
Europe [Member]
Segment Reporting Information [Line Items]
Revenues, net									382,888	394,235	369,815
Other Geographic Locations [Member]
Segment Reporting Information [Line Items]
Revenues, net									$ 165,747	$ 188,070	$ 191,819