Segment Reporting (Schedule of Net Long-Lived Assets by Principal Geographic Areas) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 437,270	$ 379,096	$ 379,096
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	348,240		310,696
Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	16,735		17,030
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	1,859		2,238
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	366,834		329,964
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	25,036		7,522
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	11,517		11,528
Netherlands
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	10,273		8,225
France
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	2,130		2,305
Switzerland
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	2,742		1,755
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	3,763		3,838
Europe, the Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	55,461		35,173
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	5,296		4,065
Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	4,257		4,426
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	5,422		5,468
Asia Pacific Region
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 14,975		$ 13,959