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Fair Value Measurements (Schedule of Assets and Liabilities) (Details) - Fair Value, Recurring - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Money market funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market funds | $ 76 | $ 76
Equity mutual funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity mutual fund | 1,007 | 1,145
Cross Currency Swaps |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative asset | 54 |
Derivative liability |  | 2,841
Foreign currency exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative asset | 2,400 | 125
Derivative liability | 5,487 | 12,373
Deferred compensation |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Deferred compensation | 1,007 | 1,145
Contingent Payment |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent payment- acquisitions | 5,000 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market funds | 76 | 76
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity mutual funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity mutual fund | 1,007 | 1,145
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cross Currency Swaps |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative asset | 0 |
Derivative liability |  | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign currency exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative asset | 0 | 0
Derivative liability | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Deferred compensation |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Deferred compensation | 1,007 | 1,145
Quoted Prices in Active Markets for Identical Assets (Level 1) | Contingent Payment |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent payment- acquisitions | 0 |
Significant Other Observable Inputs (Level 2) | Money market funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market funds | 0 | 0
Significant Other Observable Inputs (Level 2) | Equity mutual funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity mutual fund | 0 | 0
Significant Other Observable Inputs (Level 2) | Cross Currency Swaps |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative asset | 54 |
Derivative liability |  | 2,841
Significant Other Observable Inputs (Level 2) | Foreign currency exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative asset | 2,400 | 125
Derivative liability | 5,487 | 12,373
Significant Other Observable Inputs (Level 2) | Deferred compensation |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Deferred compensation | 0 | 0
Significant Other Observable Inputs (Level 2) | Contingent Payment |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent payment- acquisitions | 0 |
Significant Unobservable Inputs (Level 3) | Money market funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Money market funds | 0 | 0
Significant Unobservable Inputs (Level 3) | Equity mutual funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity mutual fund | 0 | 0
Significant Unobservable Inputs (Level 3) | Cross Currency Swaps |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative asset | 0 |
Derivative liability |  | 0
Significant Unobservable Inputs (Level 3) | Foreign currency exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative asset | 0 | 0
Derivative liability | 0 | 0
Significant Unobservable Inputs (Level 3) | Deferred compensation |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Deferred compensation | 0 | $ 0
Significant Unobservable Inputs (Level 3) | Contingent Payment |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent payment- acquisitions | $ 5,000 |

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