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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Pension liability adjustment, tax expense/benefit $ 0 $ 0 $ 0 $ 0
Unrealized gain (loss) on cash flow hedges, tax expense/benefit $ (1) $ (5) $ (9) $ 3