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Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits [Roll Forward]      
Balance at beginning of year $ 823 $ 772 $ 1,506
Addition based on tax positions related to current year 189 163 63
Addition based on tax positions related to prior years 182 0 66
Reduction based on tax positions related to prior years (98) (12) 0
Addition related to acquired company 0 0 297
Currency translation adjustments (28)    
Currency translation adjustments   14 16
Reduction for settled tax examinations 0 0 (906)
Reduction for lapses of statute of limitations (156) (114) (270)
Balance before indemnification receivable 912 823 772
Receivable from Vishay Intertechnology for indemnification 0 (12) (57)
Balance at end of year $ 912 $ 811 $ 715