Segment Information (Long-lived Assets by Geographic Areas) (Details) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
---|---|---|
United States [Member] | ||
Revenues from External Customers and Long-Lived Assets [Line Items] | ||
Long-lived assets | $ 159,566 | $ 138,704 |
International [Member] | ||
Revenues from External Customers and Long-Lived Assets [Line Items] | ||
Long-lived assets | $ 13,846 | $ 11,171 |