Segment Reporting (Schedule of Net Long-Lived Assets by Principal Geographic Areas) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 555,167	$ 533,845
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	438,490	431,306
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	412,700	401,248
Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	20,797	22,274
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	4,993	7,784
Europe, the Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	102,285	86,696
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	67,354	52,032
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	10,191	12,114
Netherlands
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	15,267	13,586
France
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	2,062	2,061
Switzerland
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	3,743	3,508
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	3,668	3,395
Asia Pacific Region
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	14,392	15,843
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	4,503	5,409
Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	3,304	4,088
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 6,585	$ 6,346