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Consolidated Statement of Stockholders' Equity (Parenthetical) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]      
Tax effect of change in post retirement benefits $ 123,000 $ 255,000 $ 12,000
Unrealized Interest Rate Swap Gain (Loss), Tax 15,000 0 2,000
Tax effect of change in Foreign Currency Translation Adjustment $ 87,000 $ 2,000 $ 103,000