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Consolidated Statement of Stockholders' Equity (Unaudited) - Parenthetical - USD ($) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Statement of Stockholders' Equity [Abstract] |  |  |  |
Tax effect of change in post retirement benefits | $ 20,000 | $ 17,000 | $ 60,000 | $ 51,000
Unrealized Foreign Currency Hedge Gain (Loss), Tax | 58,000 | (202,000) | (144,000) | (156,000)
Unrealized Interest Rate Swap Gain (Loss), Tax | $ 106,000 | $ (40,000) | $ 184,000 | $ (97,000)

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