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Fair Value of Financial Instruments (Foreign Currency Forward Contracts) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Derivative [Line Items] |  |  |
Other Comprehensive Income (Loss), before Reclassifications, before Tax | $ 1,738 | $ 829 |
Net sales | 218,378 | 202,064 |
Cost of sales | 96,940 | 92,507 |
Other Comprehensive Income (Loss), Tax | 420 | 200 |
Other comprehensive income (loss) before reclassifications | 1,318 | 629 |
Foreign Currency Transaction Gain (Loss), before Tax | (229) | (127) |
Derivative Assets and Liabilities at Fair Value [Abstract] |  |  |
Asset Fair Value | 5,733 |  | $ 5,836
Liabilities Fair Value | (295) |  | (648)
Net Fair Value | 5,438 |  | 5,188
Foreign Currency Forward Contracts |  |  |
Derivative [Line Items] |  |  |
Other Comprehensive Income (Loss), before Reclassifications, before Tax | 1,738 | 829 |
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments | (181) | (69) |
Derivatives designated as hedged instruments: | Foreign Currency Forward Contracts |  |  |
Derivative Assets and Liabilities at Fair Value [Abstract] |  |  |
Asset Fair Value | 5,719 |  |
Liabilities Fair Value | (193) |  |
Net Fair Value | 5,526 |  |
Derivatives designated as hedged instruments: | Foreign Currency Forward Contracts | Prepaids and other current assets |  |  |
Derivative Assets and Liabilities at Fair Value [Abstract] |  |  |
Asset Fair Value | 5,291 |  | 5,817
Liabilities Fair Value | (65) |  | (431)
Net Fair Value | 5,226 |  | 5,386
Derivatives designated as hedged instruments: | Foreign Currency Forward Contracts | Other long-term assets |  |  |
Derivative Assets and Liabilities at Fair Value [Abstract] |  |  |
Asset Fair Value | 428 |  |
Liabilities Fair Value | (128) |  |
Net Fair Value | 300 |  |
Derivatives not designated as hedging instruments: | Foreign Currency Forward Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount of cash flow hedges | 42,977 |  | 39,631
Derivatives not designated as hedging instruments: | Foreign Currency Forward Contracts | Prepaids and other current assets |  |  |
Derivative Assets and Liabilities at Fair Value [Abstract] |  |  |
Asset Fair Value | 14 |  | 19
Liabilities Fair Value | (102) |  | (217)
Net Fair Value | (88) |  | (198)
Cash flow hedge | Foreign Currency Forward Contracts |  |  |
Derivative [Line Items] |  |  |
Notional amount of cash flow hedges | 155,730 |  | $ 155,313
Cash flow hedges realized gains (losses) | 1,598 | (1,262) |
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months | 4,000 |  |
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net | 1,212 | (957) |
Cash Flow Hedging Gain (Loss) |  |  |
Derivative [Line Items] |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax | 386 | (305) |
Revenues | Cash flow hedge | Foreign Currency Forward Contracts |  |  |
Derivative [Line Items] |  |  |
Cash flow hedges realized gains (losses) | 1,497 | (1,413) |
Cost of Sales | Cash flow hedge | Foreign Currency Forward Contracts |  |  |
Derivative [Line Items] |  |  |
Cash flow hedges realized gains (losses) | $ 101 | $ 151 |

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