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Taxes (Details 5) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]    
Beginning Unrecognized Tax Benefits $ 24,090 $ 20,240
Increases related to current tax positions 7,638 2,484
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions (605)  
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions   1,434
Decrease relating to taxing authority settlements (4,454) (856)
Decreases resulting from a lapse of the applicable statue of limitations (505) (186)
Unrecognized Tax Benefits, Foreign Currency Translation (decreases) increases to prior year tax positions (488) (974)
Ending Unrecognized Tax Benefits $ 25,676 $ 24,090