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Financial Instruments and Fair Value Measurements (Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)) (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Sep. 30, 2019 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Forward Currency Contracts [Member] |  |  |  |  |
Derivatives designated as cash flow hedges: |  |  |  |  |
Gain (loss) recorded in other comprehensive income (loss) | $ 716 | $ 157 |  | $ (2,604) | $ 426
Gain (loss) reclassified from other comprehensive income (loss) into net income | (947) | $ 299 |  | (1,103) | 515
Foreign currency cash flow hedge gain (loss) to be reclassified during next 12 months | (1,501) |  |  | (1,501) |
Losses expected to be recognized in interest expense in next year | 594 |  |  |  |
Losses expected to be recognized in interest expense after next year | 1,000 |  |  |  |
Interest Rate Swap [Member] |  |  |  |  |
Derivatives designated as cash flow hedges: |  |  |  |  |
Gain (loss) recorded in other comprehensive income (loss) | (245) |  |  | (1,712) |
Gain (loss) reclassified from other comprehensive income (loss) into net income | (114) |  |  | (118) |
Cost of Goods Sold [Member] |  |  |  |  |
Derivatives designated as cash flow hedges: |  |  |  |  |
Gain (loss) reclassified from other comprehensive income (loss) into net income |  |  |  | (839) | 390
Cost of Goods Sold [Member] | Forward Currency Contracts [Member] |  |  |  |  |
Derivatives designated as cash flow hedges: |  |  |  |  |
Gain (loss) reclassified from other comprehensive income (loss) into net income | (712) |  | $ 217 |  |
Design and Development Expense [Member] |  |  |  |  |
Derivatives designated as cash flow hedges: |  |  |  |  |
Gain (loss) reclassified from other comprehensive income (loss) into net income |  |  |  | (29) | 125
Design and Development Expense [Member] | Forward Currency Contracts [Member] |  |  |  |  |
Derivatives designated as cash flow hedges: |  |  |  |  |
Gain (loss) reclassified from other comprehensive income (loss) into net income | 0 |  | 82 |  |
Selling, General and Administrative Expenses [Member] |  |  |  |  |
Derivatives designated as cash flow hedges: |  |  |  |  |
Gain (loss) reclassified from other comprehensive income (loss) into net income |  |  |  | (235) | $ 0
Selling, General and Administrative Expenses [Member] | Forward Currency Contracts [Member] |  |  |  |  |
Derivatives designated as cash flow hedges: |  |  |  |  |
Gain (loss) reclassified from other comprehensive income (loss) into net income | (235) |  | $ 0 |  |
Interest Expense [Member] |  |  |  |  |
Derivatives designated as cash flow hedges: |  |  |  |  |
Gain (loss) reclassified from other comprehensive income (loss) into net income |  |  |  | $ 118 |
Interest Expense [Member] | Forward Currency Contracts [Member] |  |  |  |  |
Derivatives designated as cash flow hedges: |  |  |  |  |
Gain (loss) reclassified from other comprehensive income (loss) into net income | $ 114 |  |  |  |

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