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Schedule of Geographic Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |
Revenue | $ 373,598 | $ 364,706 | $ 316,910
Percentage of Total | 100.00% | 100.00% | 100.00%
UNITED STATES |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | $ 154,825 | $ 140,973 | $ 107,892
Percentage of Total | 41.40% | 38.70% | 34.00%
GERMANY |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | $ 54,743 | $ 59,029 | $ 56,287
Percentage of Total | 14.70% | 16.20% | 17.80%
Rest Of Europe |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | $ 48,277 | $ 54,308 | $ 45,698
Percentage of Total | 12.90% | 14.90% | 14.40%
CHINA |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | $ 38,491 | $ 40,792 | $ 37,651
Percentage of Total | 10.30% | 11.20% | 11.90%
Rest of Asia-Pacific |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | $ 62,467 | $ 58,830 | $ 57,802
Percentage of Total | 16.70% | 16.10% | 18.20%
Other Countries |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue | $ 14,795 | $ 10,774 | $ 11,580
Percentage of Total | 4.00% | 2.90% | 3.70%

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