Segment Information - Property and Equipment by Geographic Region (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
---|---|---|---|
Revenues from External Customers and Long-Lived Assets [Line Items] | |||
Property, Plant and Equipment, Net | $ 20,144 | $ 17,473 | $ 21,083 |
United States | |||
Revenues from External Customers and Long-Lived Assets [Line Items] | |||
Property, Plant and Equipment, Net | 17,852 | 14,969 | 18,390 |
China | |||
Revenues from External Customers and Long-Lived Assets [Line Items] | |||
Property, Plant and Equipment, Net | $ 2,292 | $ 2,504 | $ 2,693 |