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Derivatives (Fair Value of Company's Other Derivatives) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Interest rate component of debt - not accounted for as a hedge | Accrued expenses other current liabilities | Interest rate contract |  |
Derivative [Line Items] |  |
Derivative liabilities | $ (589) | $ 0
Interest rate component of debt - not accounted for as a hedge | Other long-term liabilities | Interest rate contract |  |
Derivative [Line Items] |  |
Derivative liabilities | (430) | (1,007)
Interest rate component of debt - not accounted for as a hedge | Other current assets | Foreign Exchange Contract |  |
Derivative [Line Items] |  |
Derivative assets | 2,753 | 2,742
Interest rate component of debt - accounted for as a hedge | Accrued expenses other current liabilities |  |
Derivative [Line Items] |  |
Interest Rate Fair Value Hedge Liability at Fair Value | (6,664) | (3,118)
Interest rate component of debt - accounted for as a hedge | Other long-term liabilities | Interest rate contract |  |
Derivative [Line Items] |  |
Derivative liabilities | (18,539) | (9,382)
Interest rate component of debt - accounted for as a hedge | Other current assets |  |
Derivative [Line Items] |  |
Interest Rate Fair Value Hedge Asset at Fair Value | $ 164 | $ 0

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