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Shareholders' Equity Other Comprehensive Income (Loss) (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Before-tax amount [Abstract] |  |  |  |  |
Foreign currency translation adjustment | $ 10,685,000 | $ 5,352,000 | $ (15,908,000) | $ 3,098,000 |
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges | (2,331,000) | 651,000 | (2,341,000) | 822,000 |
Net hedging (gain) loss reclassified to net income | 832,000 | (2,610,000) | (291,000) | (2,874,000) |
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax | (457,000) | (378,000) | 81,000 | 720,000 |
Net defined benefit plan (gain) loss reclassified to net income | 469,000 | (189,000) | 940,000 | (10,000) |
Total other comprehensive income (loss), before tax | 61,286,000 | 3,582,000 | 34,569,000 | 1,756,000 |
Tax (provision) benefit [Abstract] |  |  |  |  |
Foreign currency translation adjustment | 625,000 | (165,000) | 1,773,000 | (297,000) |
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges | 135,000 | 136,000 | 427,000 | 176,000 |
Net hedging (gain) loss reclassified to net income | (25,000) | 189,000 | 49,000 | 377,000 |
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax | 6,000 | 42,000 | 2,000 | (57,000) |
Net defined benefit plan (gain) loss reclassified to net income | 29,000 | 36,000 | 25,000 | 1,000 |
Total other comprehensive income (loss) tax benefit | (770,000) | (154,000) | (2,276,000) | (200,000) |
Net-of-tax amount [Abstract] |  |  |  |  |
Foreign currency translation adjustment | 11,310,000 | 5,187,000 | (14,135,000) | 2,801,000 |
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges | (2,196,000) | 787,000 | (1,914,000) | 998,000 |
Net hedging (gain) loss reclassified to net income | 807,000 | (2,421,000) | (242,000) | (2,497,000) |
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax | (451,000) | (336,000) | 83,000 | 663,000 |
Net defined benefit plan (gain) loss reclassified to net income | 498,000 | (153,000) | 965,000 | (9,000) |
Total other comprehensive income (loss), net of tax | 62,056,000 | 3,736,000 | 36,845,000 | 1,956,000 |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent | 62,056,000 | 3,736,000 | 36,845,000 | 1,956,000 |
Accumulated Other Comprehensive Income (Loss), Net of Tax | (167,827,000) |  | (167,827,000) |  | $ (204,672,000)
OCI before reclassifications |  |  | (15,966,000) | 4,462,000 |
Foreign currency translation adjustment reclassified to net income on sale of business | 52,088,000 | 0 | 52,088,000 | 0 |
Foreign currency translation adjustment reclassified to net income on sale of business | 0 | 0 | 0 | 0 |
Foreign Currency Translation Adjustments |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
OCI before reclassifications |  |  | (14,135,000) | 2,801,000 |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
OCI before reclassifications |  |  | (1,914,000) | 998,000 |
Net Unrealized Gain (Loss) on Nonderivative Instruments |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | $ (14,400,000) | $ (14,400,000) | (14,400,000) | (14,400,000) |
OCI before reclassifications |  |  | 0 | 0 |
Pension Benefit Obligation Adjustments |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
OCI before reclassifications |  |  | $ 83,000 | $ 663,000 |

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