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Consolidated Statement of Stockholders' Equity (Unaudited) - Parenthetical - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]    
Tax effect of change in post retirement benefits $ 20,000 $ 17,000
Unrealized Foreign Currency Hedge Gain (Loss), Tax 360,000 (134,000)
Unrealized Interest Rate Swap Gain (Loss), Tax $ 178,000 $ 58,000