Segment Information (Schedule of Fixed Assets by Geographic Location) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 283,752	$ 246,262
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	244,175	202,833
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	25,925	27,218
Other Geographic Locations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 13,652	$ 16,211