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Shareholders' Equity Amounts recognized from accumulated other comprehensive income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Stockholders' Equity Note [Abstract] |  |  |
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net | $ 109 | $ 539 | $ 1,679
Cross Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net | (1,022) | 2,212 | (1,416)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | 913 | (2,751) | (263)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax | (52) | 310 | 536
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax | (861) | 2,441 | (273)
Amortization of actuarial (gains) losses and plan amendments and prior service cost | 15,467 | 18,756 | 20,137
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent | 3,323 | 4,390 | 5,264
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax | $ 12,144 | $ 14,366 | $ 14,873

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