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Accumulated Other Comprehensive Income (Loss) and Shareholders' Equity (Components) (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 28, 2019 | Sep. 29, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | $ 563,259 | $ 514,577
Other comprehensive income (loss) before reclassifications | (2,359) | 524
Tax (expense) or benefit | 594 | (609)
Reclassification of stranded tax impact | 0 |
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | (947) | (499)
Ending balance | 560,345 | 553,074
Foreign Currency Translation Adjustment |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | (2,973) | 31
Other comprehensive income (loss) before reclassifications | (406) | (1,944)
Tax (expense) or benefit | 0 | 0
Reclassification of stranded tax impact | 0 |
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 0 | 0
Ending balance | (3,379) | (1,913)
Unrealized Gains (Losses) on Marketable Securities |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | (156) | (132)
Other comprehensive income (loss) before reclassifications | 319 | (125)
Tax (expense) or benefit | (67) | 26
Reclassification of stranded tax impact | 0 |
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 0 | 0
Ending balance | 96 | (231)
Pension and Post-retirement Liabilities |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | (2,929) | (5,630)
Other comprehensive income (loss) before reclassifications | 0 | 0
Tax (expense) or benefit | 0 | 0
Reclassification of stranded tax impact | (1,185) |
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 0 | 0
Ending balance | (4,114) | (5,630)
Derivative Financial Instruments |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | 2,459 |
Other comprehensive income (loss) before reclassifications | (2,272) |
Tax (expense) or benefit | 661 |
Reclassification of stranded tax impact | 446 |
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | (947) |
Ending balance | 347 |
Derivative Financial Instruments |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance |  | 2,120
Other comprehensive income (loss) before reclassifications |  | 2,593
Tax (expense) or benefit |  | (635)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax |  | (499)
Ending balance |  | 3,579
Accumulated Other Comprehensive Income (Loss) |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |
Beginning balance | (3,599) | (3,611)
Reclassification of stranded tax impact | (739) |
Ending balance | $ (7,050) | $ (4,195)

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