Segment and Geographic Information (Geographic Location) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 67,425	$ 56,043
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	65,612	54,380
All other countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 1,813	$ 1,663