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Derivative Financial Instruments and Concentrations of Credit Risk (Details) lb in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 USD ($) lb | Dec. 31, 2018 USD ($) lb | Dec. 31, 2017 USD ($) | Mar. 08, 2018 USD ($)
Derivative disclosures |  |  |  |
Other expense, net | $ (4,900,000) | $ (7,600,000) | $ (7,100,000) |
Interest Rate Swap, Through December 2021 |  |  |  |
Derivative disclosures |  |  |  |
Unrealized gain (loss), net of taxes, recorded in AOCI from cash flow hedges | 1,900,000 |  |  |
Unrealized gain (loss), net of tax, recorded in AOCI from cash flow hedges |  | 200,000 |  |
Interest Rate Swap, Through December 2021 | Derivative contracts designated as hedging instruments |  |  |  |
Derivative disclosures |  |  |  |
Derivative notional amount | 247,000,000.0 |  |  | $ 260,000,000.0
Fixed interest rate (percentage) |  |  |  | 2.535%
Fair value of derivatives | (2,500,000) | 200,000 |  |
FX Forward Contracts |  |  |  |
Derivative disclosures |  |  |  |
Derivative notional amount | 26,000,000.0 | 14,400,000 |  |
Commodity contract |  |  |  |
Derivative disclosures |  |  |  |
Unrealized gain (loss), net of taxes, recorded in AOCI from cash flow hedges | 300,000 |  |  |
Unrealized gain (loss), net of tax, recorded in AOCI from cash flow hedges |  | (800,000) |  |
Fair value of derivative contract - liability | $ 400,000 | $ 1,000,000.0 |  |
Commodity contract | Derivative contracts designated as hedging instruments |  |  |  |
Derivative disclosures |  |  |  |
Notional amount of commodity contracts | lb | 3.4 | 3.9 |  |
Net Unrealized Gains (Losses) on Qualifying Cash Flow Hedges | Amount Reclassified from AOCI | Interest Rate Swap |  |  |  |
Derivative disclosures |  |  |  |
Other expense, net |  |  | $ 2,700,000 |

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