Segment Information (Schedule of Long-Lived Asset by Geographic Areas) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property and equipment, net	$ 56,647	$ 20,660
United States (U.S.)
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property and equipment, net	41,799	9,216
Americas (excluding U.S.)
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property and equipment, net	4,189	1,807
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property and equipment, net	386	141
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property and equipment, net	7,021	6,803
APAC (excluding China)
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property and equipment, net	$ 3,252	$ 2,693