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Income Taxes (Details 4) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Taxes [Line Items] |  |  |
Balance as of the beginning of the year | $ 1,039 | $ 656 | $ 641
Increases related to prior year tax positions | 348 | 0 | 0
Decreases related to prior year tax positions | 0 | (15) | (244)
Increases related to current year tax positions | 283 | 398 | 259
Settlements | 0 | 0 | (244)
Lapse of statue | 283 | 398 | 259
Lapse of statue | (76) | 0 |
Balance as of the end of the year | $ 1,594 | $ 1,039 | $ 656

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