Geographic Information - Schedule of Long-Lived Assets by Geographic Areas (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	$ 47,266	$ 42,379
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	26,372	26,696
EMEA
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	12,537	10,351
Republic of Ireland
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	5,703	5,171
Other EMEA Countries
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	6,834	5,180
APAC:
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	8,357	5,332
AUSTRALIA
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	3,414	4,544
Other APAC Countries
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	$ 4,943	$ 788