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Derivative Financial Instruments and Concentrations of Credit Risk (Details) lb in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 USD ($) lb | Dec. 31, 2019 USD ($) lb | Dec. 31, 2018 USD ($) | Feb. 29, 2020 USD ($) | Mar. 31, 2018 USD ($)
Derivative disclosures |  |  |  |  |
Other income (expense), net | $ 2,700,000 | $ (5,200,000) | $ (7,600,000) |  |
Interest Rate Swap |  |  |  |  |
Derivative disclosures |  |  |  |  |
Unrealized gain (loss), net of taxes, recorded in AOCI from cash flow hedges | 5,900,000 | 1,900,000 |  |  |
Interest Rate Swap | Derivative contracts designated as hedging instruments |  |  |  |  |
Derivative disclosures |  |  |  |  |
Fair value of derivatives | 7,800,000 | 2,500,000 |  |  |
Interest Rate Swap | Derivative contracts designated as hedging instruments | Short Term Liability |  |  |  |  |
Derivative disclosures |  |  |  |  |
Derivative liability | 1,400,000 |  |  |  |
Interest Rate Swap, Through March 2021 | Derivative contracts designated as hedging instruments |  |  |  |  |
Derivative disclosures |  |  |  |  |
Derivative notional amount | 234,000,000.0 |  |  |  | $ 260,000,000.0
Fixed interest rate (percentage) |  |  |  |  | 2.535%
Interest Rate Swap Through November2024 | Derivative contracts designated as hedging instruments |  |  |  |  |
Derivative disclosures |  |  |  |  |
Derivative notional amount |  |  |  | $ 248,400,000 |
Fixed interest rate (percentage) |  |  |  | 1.061% |
FX Forward Contracts |  |  |  |  |
Derivative disclosures |  |  |  |  |
Derivative notional amount | 6,300,000 | 26,000,000.0 |  |  |
Commodity contract |  |  |  |  |
Derivative disclosures |  |  |  |  |
Unrealized gain (loss), net of taxes, recorded in AOCI from cash flow hedges | (1,500,000) | (300,000) |  |  |
Cash flow hedge asset | $ 2,400,000 | $ 400,000 |  |  |
Commodity contract | Derivative contracts designated as hedging instruments |  |  |  |  |
Derivative disclosures |  |  |  |  |
Notional amount of commodity contracts | lb | 3.2 | 3.4 |  |  |

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