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Shareholders' Equity Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Before-tax amount [Abstract] |  |  |
Foreign currency translation adjustment | $ (26,593) | $ (2,254) |
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges | (10) | 171 |
Net hedging (gain) loss reclassified to net income | (1,123) | (264) |
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax | 538 | 342 |
Net defined benefit plan (gain) loss reclassified to net income | 471 | 179 |
Total other comprehensive income (loss), before tax | (26,717) | (1,826) |
Tax (provision) benefit [Abstract] |  |  |
Foreign currency translation adjustment | 1,148 | (132) |
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges | 292 | 40 |
Net hedging (gain) loss reclassified to net income | 74 | 188 |
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax | (4) | (15) |
Net defined benefit plan (gain) loss reclassified to net income | (4) | (35) |
Total other comprehensive income (loss) tax benefit | (1,506) | (46) |
Net-of-tax amount [Abstract] |  |  |
Foreign currency translation adjustment | (25,445) | (2,386) |
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges | 282 | 211 |
Net hedging (gain) loss reclassified to net income | (1,049) | (76) |
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax | 534 | 327 |
Net defined benefit plan (gain) loss reclassified to net income | 467 | 144 |
Total other comprehensive income (loss), net of tax | (25,211) | (1,780) |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | (25,211) | (1,780) |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (229,883) |  | $ (204,672)
OCI before reclassifications | (24,629) | (1,848) |
Foreign Currency Translation Adjustments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
OCI before reclassifications | (25,445) | (2,386) |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
OCI before reclassifications | 282 | 211 |
Net Unrealized Gain (Loss) on Nonderivative Instruments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (14,400) | (14,400) |
OCI before reclassifications | 0 | 0 |
Pension Benefit Obligation Adjustments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
OCI before reclassifications | $ 534 | $ 327 |

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