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Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Pension liability adjustment, tax expense/benefit $ (46) $ 21 $ 82
Unrealized gain (loss) on cash flow hedges, expense/ benefit $ 9 $ (6) $ (43)