Geographic Information and Significant Customers Long Lived Assets by Geographic Location (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 694,864	$ 608,823
COSTA RICA
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	81,920	80,956
Mexico Property and Equipment [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	64,242	61,008
Other LATAM [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	22,828	19,432
CANADA
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	4,545	4,362
Italy Property and Equipment [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	7,819	6,860
SPAIN
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	6,516	5,601
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	2,427	2,625
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	15,152	5,169
Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	205,449	186,013
United States property and equipment [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 489,415	$ 422,810