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Income Taxes (Details 10) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Unrecognized Tax Benefit [Line Items]      
Balance at beginning of year $ 1,335 $ 788 $ 483
Increase related to prior year tax positions 0 292 368
Decrease related to prior year tax positions (292) 0 0
Increase related to current year tax positions 0 630 0
Settlements 0 (368) 0
Lapse of statute of limitations (2) (7) (63)
Effect of exchange rate change 11 0 0
Balance at end of year $ 1,052 $ 1,335 $ 788